PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Model 34788-Series
Recovery, Recycling,
and Recharging Unit
Service Manual
Includes Models: AC34788 (MAC), RA-C34788 (Cornwell), GE-48800,
and Robinair 48920-Series Units.
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P ar ts and C o m p o n e n t s
PARTS
AND
34788 (Basic) Service Manual
COMPONENTS
Parts and Components .........................................................................................89
How to Use the Parts and Components Illustrated Parts Listing .....................89
Component Assemblies .......................................................................................91
External Assembly..............................................................................................................91
Internal Assembly ...............................................................................................................94
Head Assembly ...................................................................................................................101
ISV Assembly (Domestic) ..................................................................................................104
ISV Assembly (Int’l) ............................................................................................................106
Manifold Assembly .............................................................................................................108
Vacuum Pump .....................................................................................................................116
Compressor ........................................................................................................................118
Base Assembly ...................................................................................................................120
Electrical Diagram .................................................................................................121
Plumbing Diagram .................................................................................................125
Main Component Descriptions ............................................................................127
Alphabetical Parts List ..........................................................................................129
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
88
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
PARTS AND COMPONENTS
Purpose
This section provides illustrations and parts breakdown of all parts of the assembly(ies) shown
on the title page which can be disassembled, repaired or replaced, and reassembled.
HOW TO USE THE PARTS AND COMPONENTS
ILLUSTRATED PARTS LISTING
Disassembly Order System
The disassembly order system used in the parts
list shows the relationship of one part to another.
For a given item, replaceable parts making up
the top assembly or subassembly depicts the
relationship of the item to the associated next
higher assembly. Indenture is not used in this
illustrated parts list due to the relative simplicity
of these units.
Number Column (No.)
This column contains the callout or index number of a part on the exploded view assembly
drawing. Each number corresponds to a specific part on the drawing. When a triple dash
(---) is shown, the part is either the top assembly
for the drawing, or the part is not illustrated and
therefore not called out.
The illustrated parts list does not list or illustrate
parts which lose their identity by being permanently welded or riveted to other pieces.
Description Column (Description)
This column lists the noun name of the
item followed by any descriptor (Example:
GAUGE, LOW SIDE). In this case “GAUGE”
is the noun, and “LOW SIDE” is the descriptor.
Units Per Assembly (Qty)
The Qty column shows the total number of numbers required per assembly, per subassembly,
and per sub-subassembly as applicable. For
bulk items, the letters AR indicate “as required”.
The letters REF, if used, indicate the item is
listed for reference purposes.
Part Number Column (Part No.)
This column contains the part number of the
item listed in the Description column. The letters RNS, REF, or the abbreviated Ref. Only, if
used, indicate the item is listed for reference
purposes, but is not available for purchase.
A Robinair part number assigned a part is five
or six digit drawing number. Part numbers beginning with RA are “Replacement Assembly”
numbers. These numbers depict a kit of parts
or assemblies used to repair or replace certain
parts of the end item.
Effectivity Column (Effectivity)
Reference letters (A through Z except I and 0)
are assigned to the Effectivity column to each
top assembly in each IPL figure. The reference
letter of the applicable top assembly is also
shown in the Effectivity column for each detail
part and subassembly. When no reference letter is shown for detail parts and subassemblies,
the item is used on all top assemblies.
Parts Replacement Data
The interchangeability relationship between
parts is identified in the Description column of
the parts list. A list of the terms used to show
interchangeability and their definition is shown
in the table following.
89
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P ar ts and C o m p o n e n t s
PARTS LIST
TERM
ABBREVIATION
Optional
OPT
Supersedes
SUPSDS
Superseded
SUPSD BY
Replaced By
REPLD BY
Replaces
REPLS
34788 (Basic) Service Manual
DEFINITION
This part is interchangeable with other parts in
the same Item number variant group or other item
number if designated
The part in the part number column replaces
and is not interchangeable with the item number
shown in the notation.
The part in the part number column is replaced by
and is not interchangeable with the item number
shown in the notation.
The part in the part number column is replaced by
and interchangeable with the item number shown
in the notation.
The part in the part number column replaces and
is interchangeable with the item number shown in
the notation.
Technical Service Bulletin (TSB) Incorporation
Except as indicated below, assemblies, subassemblies and detail parts subject to modification, deletion, addition or replacement by an
issued service bulletin are annotated to show
both pre and post service bulletin configuration.
The term (PRE SB GGGG) in the Description
column designates the original configuration,
and the term (POST SB GGGG) identifies assemblies and parts after the service bulletin
modification has been completed.
Subassemblies and detail parts used on assemblies bearing the pre- or post-service bulletin notation will not carry the same notation
themselves if the use code(s) assigned to them
clearly reflect(s) their pre- or post-service bulletin status.
Items Not Illustrated
Items not illustrated are indicated by a (Not
shown.) notation in the Description column.
Alpha Variant Item Numbers
Alpha variants A through Z (except I and O)
are assigned to an existing item number when
necessary to show:
} Added items
} Technical Service bulletin modifications
} Configuration differences
} Optional parts
} Product improvement parts (non service
bulletin)
Alpha variant item numbers are not shown on
the exploded view when the appearance and
location of the alpha variant item is the same
as the basic item.
PANZITTA SALES & SERVICE
72 George Avenue
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570-822-6720 800-822-6720
www.panzittasales.com
90
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
COMPONENT ASSEMBLIES
EXTERNAL ASSEMBLY
ss00426
6
1
2
3
4
7
5
8
12
9
13
11
10
14
15
16
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Figure 3-1. External Assembly
91
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
EXTERNAL ASSEMBLY
No.
---
1
2
Description
UNIT, BASIC, 34788, 115 VAC (DOMESTIC)
UNIT, BASIC, 34788-1, 230 VAC
(INT’L ONLY)
UNIT, CORNWELL, RA-C34788, 115
VAC
UNIT, MATCO, H234788, 115 VAC
UNIT, MAC, AC34788, 115 VAC
UNIT, GENERAL MOTORS, GE48800, 115 VAC
UNIT, ROBINAIR, 48920, 115VAC
UNIT, BASIC, HONDA 48920T
UNIT, HONDA, 48920U, 115 VAC
UNIT, ROBINAIR, 34788-H, 115VAC
DECAL, 48920 CONTROL BOARD
DECAL, FRONT
Qty
---
1
1
Part No.
Ref. Only
Effectivity
A
Ref. Only
B
Ref. Only
C
Ref. Only
Ref. Only
Ref. Only
D
E
F
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
539901
G
H
J
K
H, J
A, B, F, G, H,
J, K
C
D
E
A, B, F, G, K
C, D, E
H, J
3
FRONT PANEL ASSEMBLY
1
4
5
SCREW, -20 G ¢ INCH
BOTTLE, OIL DRAIN
5
1
124244
123867
124241
544023
544250
122293
121829
17756
6
BOTTLE, OIL DRAIN
CIRCUIT BREAKER, 15 AMP
1
1
121588
518638
7
8
9
CIRCUIT BREAKER, 7 AMP (INT’L
ONLY)
SWITCH, POWER, DPST (I/O)
DECAL, 1-800 PHONE NUMBER
CABLE, POWER
10
11
CABLE, POWER (INT’L ONLY)
DECAL, SERIAL NUMBER
STRAP, HOOK AND LOOP
92
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552036
1
1
1
RA19343
109076
122770
1
1
545162
Ref. Only
121925
A, B, C, D, E,
F, G
H, J, K
A, C, D, E, F,
G, H, J, K
B
A, C, D, E, F,
G, H, J, K
B
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
EXTERNAL ASSEMBLY
No.
12
Description
MANUALS, OPERATION
13
14
15
DECAL, 34724 FILTER REORDER
DECAL, UL
DECAL
16
DOOR, REAR, SIDEWINDER
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
1
1
1
1
Part No.
539680
539602
541844
541846
541845
539602
557701
560826
540600
Ref. Only
515770
1
121575
Effectivity
A, F
B
C
D
E
G
H, J
K
A, C, D, E, F,
G, H, J, K
A
B
C
D
E
F
G
H
J
K
93
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
INTERNAL PARTS
ss00130
2
1
3
4
5
29 30
6
7
28
8
26 27
See
Detail A
24 25
14
See
18
Detail B
15 16 17
31
32
Front View
33 34
Side View
61 62 63
35 36 37
59 60
See
Detail C
38 39 40
58
57
41 42 43 44
54 55 56
53
45
52
46
Rear View
See
Detail D
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Figure 3-2. Internal Assembly (Sheet 1 of 3)
94
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34788 (Basic) Service Manual
ss00424
11
8
12
9
10
18
11
13
Detail A
2X 20
4X 48
49 4X
4X 50
4X 21
Compressor
Foot
51 4X
4X 22
Base
Assembly
23
19
Detail B (Typical)
36
Shelf
49 4X
4X 47
35
Detail D
Detail C
37
Figure 3-2. Internal Assembly (Sheet 2 of 3)
95
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ss01291
Filtered Tank Fill Hose
P/N: 566452
Hose is not reparable, except for filter replacement.
R-134a Quick Seal Assembly, P/N 567796
44.381 inches
1127.28 mm
Unfiltered Tank Fill Hose
P/N: 539007
Hose is not reparable. Shown here for comparison purposes only.
42.00 inches
1066.8 mm
Detail E
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Figure 3-2. Internal Assembly (Sheet 3 of 3)
96
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
INTERNAL ASSEMBLY
No.
---
1
2
3
4
Description
UNIT, BASIC, 34788, 115 VAC (DOMESTIC) (SEE FIGURE 3-1 FOR
NEGT HIGHER ASSEMBLY.)
UNIT, BASIC, 34788-1, 230 VAC
(INT’L ONLY) (SEE FIGURE 3-1 FOR
NEGT HIGHER ASSEMBLY.)
UNIT, CORNWELL, H234788, 115
VAC (SEE FIGURE 3-1 FOR NEGT
HIGHER ASSEMBLY.)
UNIT, MATCO, RA-C34788, 115 VAC
(SEE FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY.)
UNIT, MAC, AC34788, 115 VAC (SEE
FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY.)
UNIT, GENERAL MOTORS, GE48800, 115 VAC (SEE FIGURE 3-1
FOR NEGT HIGHER ASSEMBLY.)
UNIT, ROBINAIR, 48920, 115VAC
(SEE FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY.)
UNIT, BASIC, HONDA 48920T (SEE
FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY.)
UNIT, HONDA, 48920U, 115 VAC
(SEE FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY.)
UNIT, ROBINAIR, 34788-H, 115VAC
(SEE FIGURE 3-1 FOR NEGT HIGHER ASSEMBLY).
HEAD ASSEMBLY (SEE FIGURE 3-3
FOR BREAKDOWN.)
Qty
---
ENCLOSURE, HEAD HINGE COVER
ENCLOSURE HEAD, SHOULDER
SCREW,
-20 G ¢ INCH
Part No.
Ref. Only
Effectivity
A
Ref. Only
B
Ref. Only
C
Ref. Only
D
Ref. Only
E
Ref. Only
F
Ref. Only
G
Ref. Only
H
Ref. Only
J
Ref. Only
K
2
Ref. Only
RA20080
Ref. Only
Ref. Only
539025-2
1
541750-2
539025-1
4
541750-1
121829
A, B, F, G
A, B, F, G, K
C, D, E
H, J
A, B, F, G, H,
J, K
C, D, E
A, B, F, G, H,
J, K
C, D, E
1
97
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34788 (Basic) Service Manual
INTERNAL ASSEMBLY
No.
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Description
STATION PUMP, 3 CFM, 115V (SEE
FIGURE 3-7.)
STATION PUMP, 3 CFM, 230V (INT’L
ONLY) (SEE FIGURE 3-7.)
SCREW, -20 G 1 INCH
BUSHING, HEYCO
HOSE, FLUSHING (SEE DETAIL A)
Qty
1
Part No.
RA20031
RA20075
3
1
1
Ref. Only
100385
546946
DETAIL A (ITEMS 9 THROUGH 13)
FITTING, SPECIAL
1
546871
FITTING, SPECIAL
1
546872
O-RING
3
10267
FITTING, R134A, HIGH SIDE
1
546882
FITTING, R134A, LOW SIDE
1
546883
***END DETAIL A***
RUBBER BUMPER
1
122256
SCREW, PLASTITE, G ¢ INCH
1
123497
CENTER DIVIDER
1
545312
SCREW, PLASTITE, G ¢ INCH
7
123497
ISV ASSEMBLY (SEE FIGURE 3-4
1
Ref. Only
FOR BREAKDOWN.)
ISV ASSEMBLY (SEE FIGURE 3-5
FOR BREAKDOWN.)
DETAIL B (ITEMS 19 THROUGH 23)
SCALE ASSEMBLY
1
RA20002
BOLT, SERRATED HD, -20 G ¡
2
122255
INCH
WASHER, FENDER, ¼ INCH ID
4
Ref. Only
LOCKNUT, ¼-20
4
Ref. Only
MAGNET
1
539903
***END DETAIL B***
SHELF, VACUUM PUMP
1
545466
SCREW, PLASTITE, ¼ G ¢ INCH
2
123497
BOTTLE, OIL INJECT
1
115642
O-RING
1
112699
NUT, 8-32 SEMS
2
112414
PCB ASSEMBLY, RELAY BOARD
1
RA20070
RA20013
SCREW, 6-32 G 1/4 INCH
4
Ref. Only
98
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Effectivity
A, C, D, E, F,
G, H, J, K
B
A, C, D, E, F,
G, H, J, K
B
A, B, C, D, E
A, B, C, D, E
OBSOLETE
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
INTERNAL ASSEMBLY
No.
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Description
TAG, POWER CABLE
HOSE, TANK FILL (FILTERED) SEE
DETAIL E FOR COMPARISON TO
539007 AND FILTER PART NUMBER.)
HOSE, TANK FILL (UNFILTERED)
(SEE DETAIL E FOR COMPARISON
TO 566452.)
FAN ASSEMBLY, 115V
Qty
1
1
Part No.
112661
566452
1
539007
1
RA17416
FAN ASSEMBLY, 230V (INT’L ONLY)
RA17516
SCREW, 10-16 G 3/4 INCH
2
122257
DETAIL C (ITEMS 35 THROUGH 37)
CAP, METAL, DRILLED, 38MM
1
RA19914
NUT, NYLON (PART OF RA19914)
1
522722
FITTING, STRAIGHT THROUGH
1
123616
***END DETAIL C***
MANIFOLD ASSEMBLY (SEE FIG1
RA20018
URE 3-6 FOR BREAKDOWN.)
MANIFOLD ASSEMBLY (SEE FIG530052
URE 3-6 FOR BREAKDOWN.) (EARLIER VERSION OF RA20018.)
MANIFOLD ASSEMBLY (SEE FIGRef. Only
URE 3-6 FOR BREAKDOWN.)
MANIFOLD ASSEMBLY (SEE FIG557696
URE 3-6 FOR BREAKDOWN.)
SCREW, ¼-20 G 3-1/2 INCH
1
Ref. Only
SCREW, 1/4 G 1/2 INCH
1
109556
DOOR LATCH KIT (CONTAINS ITEMS
2
RA19632
42, 43, 44.) (PART OF RA19916 FASTENER AND SEAL KIT.)
RETAINER, DOOR LATCH (PART OF
2
Ref. Only
RA19632)
RECEPTACLE, DOOR LATCH (PART
2
Ref. Only
OF RA19632)
LATCH, DOOR (PART OF RA19632)
2
Ref. Only
INSERT, DIE-CUT FOAM
1
541742
COMPRESSOR ASSEMBLY, 115V
1
RA20020
(SEE FIGURE 3-8.)
COMPRESSOR ASSEMBLY, 230V
RA20076
(INT’L ONLY) (SEE FIGURE 3-8.)
Effectivity
A, C, D, E, F,
G, H, J, K
B
A, B, C, D, E
A, B, C, D, E
A, B, C, D, E
A, B, C, D, E
A, B, C, D, E
F, G
H, J, K
A, C, D, E, F,
G, H, J, K
B
99
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34788 (Basic) Service Manual
INTERNAL ASSEMBLY
No.
Description
Qty
Part No.
DETAIL D (ITEMS 38 THROUGH 42)
47
LOCKNUT, ¼-20
4
Ref. Only
48
BOLT, SERRATED HD, ¼-20 G 2-INCH
4
119105
49
WASHER, FENDER, ¼ INCH ID
8
Ref. Only
4
Ref. Only
50
SLEEVE, COMPRESSOR (PART OF
RA20020 AND RA20076.)
51
GROMMET, COMPRESSOR (PART
4
Ref. Only
OF RA20020 AND RA20076.)
***END DETAIL D***
52
BASE ASSEMBLY (SEE FIGURE 9
1
544094
FOR BREAKDOWN.)
53
EDGE TRIM, RUBBER
A/R
Ref. Only
54
SENSOR ASSEMBLY
1
RA20086
55
BRACKET (PART OF RA20086.)
1
Ref. Only
56
NUT, 1/4 FLARE
1
113564
57
NUT, 8-32 SEMS
2
112414
58
SCREW, 8-32 G 3/8 INCH SEMS
1
514514
59
POWER SUPPLY, 12 VOLT
1
RA20014
60
SCREW, SOCKET HEAD CAP M3.5
4
RS-9100
G5
61
SIDE SUPPORT ASSEMBLY
1
546620
62
SCREW, PLASTITE, ¼ G ¢ INCH
7
121829
63
WASHER, FLAT ¼ INCH
7
12719
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Effectivity
H, J
H, J
A
B
C
D
E
F
G
H
J
K
PANZITTA SALES & SERVICE
72 George Avenue
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570-822-6720 800-822-6720
www.panzittasales.com
100
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
HEAD ASSEMBLY
ss00135
1
3 2X
2
3 2X (See Note 1)
(See Note 2)
4
6
5
15
8
9
7
12
11
13
17
14
16
18
19
20
10
21
NOTES:
1. Torque Item 3 to 5 in-lbs.
2. Head Assembly shown is 34788 (Effectivity
codes A thru E); head assemblies for GE-48800,
34788-H, and 48920-series are similar except
for Oil Inject button (Effectivity codes F thru J).
4
Figure 3-3. Head Assembly
101
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34788 (Basic) Service Manual
HEAD ASSEMBLY
No.
---
8
Description
HEAD ASSEMBLY, BASIC (SEE
FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
HEAD ASSEMBLY, BRANDED (SEE
FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
HEAD ASSEMBLY, 48920T AND
48920U (SEE FIGURE 3-2 FOR NEGT
HIGHER ASSEMBLY.)
GAUGE, LOW SIDE
GAUGE, HIGH SIDE
NUT, HEG, 10-32, SEMS
CABLE, INTERCONNECT
TUBE, 1/8 INCH RED, 4 FEET LONG
TUBE, 1/8 INCH BLUE, 4 FEET LONG
ELBOW, 1/8 MP G 1/8 INCH PNEUMATIC
ENCLOSURE, SWIVEL TOP, FRONT
9
10
11
12
ENCLOSURE, SWIVEL TOP, FRONT,
RED
DECAL, OVERLAY
BEZEL (PART OF RA20001.)
SCREW, MACH, 6-32 G 3/16 INCH
KEYPAD (RA20001 SHOWN)
1
2
3
4
5
6
7
13
14
15
16
17
PCB ASSEMBLY, DISPLAY/CONTROL
BOARD
SCREW, 6-32 G 3/8 INCH
ENCLOSURE, SWIVEL TOP, BACK
ENCLOSURE, SWIVEL TOP, BACK,
RED
PCB ASSEMBLY, SD CARD, NGEN
RRR
SCREW, THD FORM, ¼-20 G ¡
INCH PHD, PH
102
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Qty
---
Part No.
RA20080
Effectivity
A, B, F, G, K
Ref. Only
C, D, E
Ref. Only
H, J
1
1
4
1
1
1
2
RA19786
RA19787
112415
539995
RA20003
RA20004
123928
1
539024-1
541749-1
1
1
6
1
539880
539618
515022
RA20001
1
557635
RA20012
4
1
539665
Ref. Only
539024-2
541749-2
1
539649
4
231728
A, B, F, G, H,
J, K
C, D, E
A, B, C, D, E,
F, G, K
H, J
A, B, C, D, E,
F, G, K
H, J
A, B, F, G, H,
J, K
C, D, E
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
HEAD ASSEMBLY
No.
18
19
20
Description
ENCLOSURE, SWIVEL, TOP, SIDE
COVER
ENCLOSURE, SWIVEL, TOP, SIDE
COVER, RED
SCREW, 6-19 G ¡ EH TORG PLASTITE
ENCLOSURE, SWIVEL TOP, POCKET
ENCLOSURE, SWIVEL TOP, POCKET, RED
21
CABLE, SD BOARD
22
STA-STRAP, 3-3/4”G3/32” WIDE
23
DECAL, CONTROL PANEL, 34788
DECAL, CONTROL PANEL, 34788-I
DECAL, CONTROL PANEL, MAC
AC34788
DECAL, CONTROL PANEL, GE-48800
DECAL, CONTROL PANEL, 48920
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
1
Part No.
539024-3
541749-3
6
121711
1
539024-4
1
3
1
Effectivity
A, B, F, G, H,
J, K
C, D, E
541749-4
A, B, F, G, H,
J, K
C, D, E
539996
109695
540072
552110
541851
A
B
E
546987
Ref. Only
F
G, H, J, K
A
B
C
D
E
F
G
H
J
K
PANZITTA SALES & SERVICE
72 George Avenue
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570-822-6720 800-822-6720
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103
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ISV ASSEMBLY (DOMESTIC)
ss00136
1
2
8
3
7
4
LIQUID
V
SCALE: 1=4
6
SCALE: 1=4
5
11
10
12
9
VAPOR
AIR
PURGE
LIQUID
13
Figure 3-4. ISV Assembly Domestic
104
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ISV ASSEMBLY, DOMESTIC
No.
---
1
2
3
4
5
6
7
8
9
10
11
12
13
Description
ISV ASSEMBLY, DOMESTIC (SEE
FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
TEMPERATURE PROBE
TRANSDUCER, AIR PURGE
TEE, MALE BRANCH 1/8 NPTF
ORIFICE, UNION, .026
MUFFLER, AIR EGHAUST
PRESSURE RELIEF, 450PSI
FITTING, TEE, .25FP G .25FP G
.25MP
VALVE, BALL
FITTING, STRAIGHT
SOLENOID, 12VDC, DISCRETE
VALVE, BALL
VALVE, BALL
TANK, ISV
Qty
---
Part No.
Ref. Only
1
1
1
1
1
1
1
539472
RA20067
539654
539804
519605
RA20079
508690
1
1
1
1
1
1
540322
210312
RA20009
539799
539798
539477
Effectivity
All Domestic
Models
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
105
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ISV ASSEMBLY (INT’L)
SS00440
1
2
1
3
5
6
4
7
8
Figure 3-5. ISV Assembly (Int’l)
106
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ISV ASSEMBLY, INTERNATIONAL
No.
--1
2
3
4
5
6
7
8
Description
ISV ASSEMBLY, INT’L (SEE FIGURE
3-2 FOR NEGT HIGHER ASSEMBLY.)
SOLENOID, 12VDC, DISCRETE
TEMPERATURE PROBE
VALVE, BALL
TRANSDUCER, AIR PURGE
MUFFLER, AIR EGHAUST
ORIFICE, UNION, .026
FITTING, TEE, 1/8FP G 1/8FP G
1/8MP
TANK, ISV
Qty
---
Part No.
Ref. Only
1
1
1
1
1
1
1
RA20009
539472
544672
RA20067
519605
539804
508690
1
543184
Effectivity
All Int’l Models
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
107
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
MANIFOLD ASSEMBLY
ss00437
3
2
4
5
4
6
2
1
Angle A
NOTE: When replacing Item 3 (19 on
models 48920T and U) or Item 6,
set Angle A and Angle B as closely as
possible to the original angle. Angles
may vary by model.
8
9
3
Angle B
7
10
Figure 3-6. Manifold Assembly (Sheet 1 of 5)
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
108
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ss00142
12
11X 13
11
14
32
33 34 35
2X 18
12
17
15
12
3
3
16
12
Top View
(GE-48800, 34788-H, and Robinair 48920)
Figure 3-6. Manifold Assembly (Sheet 2 of 5)
109
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
12
ss00141
12X 13
11
14
31
3
2X 18
12
17
15
12
3
3
16
12
Top View
(Robinair 34788, 34788-I, Cornwell H234788,
MATCO RA-C34788, and MAC AC34788)
Figure 3-6. Manifold Assembly (Sheet 3 of 5)
110
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
12
ss00438
13 12X
11
14
19
18
17
12
12
15
3
3
16
12
Top View
(Honda 48920T and 48920U)
Figure 3-6. Manifold Assembly (Sheet 4 of 5)
111
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P ar ts and C o m p o n e n t s
ss00439
23
22
24
34788 (Basic) Service Manual
25
26
21
20
27
26
28
30
36
29
Figure 3-6. Manifold Assembly (Sheet 5 of 5)
PANZITTA SALES & SERVICE
72 George Avenue
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570-822-6720 800-822-6720
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112
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34788 (Basic) Service Manual
MANIFOLD ASSEMBLY
No.
---
1
2
3
4
5
6
7
8
9
10
11
12
Description
MANIFOLD ASSEMBLY (SEE FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
MANIFOLD ASSEMBLY (SEE FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
MANIFOLD ASSEMBLY (SEE FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.) NOTE: MANIFOLD NO
LONGER AVAILABLE. NOT USED
AFTER 11-1-2008.
MANIFOLD ASSEMBLY (SEE FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.) NOTE: USED AFTER 11-12008.
MANIFOLD ASSEMBLY, 48920T
(SEE FIGURE 3-2 FOR NEGT HIGHER ASSEMBLY.)
ELBOW, 1/8 MP G1/8 PNEUMATIC
(SEE NOTE F.)
SOLENOID, 12VDC, DISCRETE (S13
AND S14)
ELBOW, COMPRESSION, 1/8 MP G
3/8 INCH PNEUMATIC (SEE NOTE F.)
FITTING, COMPRESSION, 1/8 NPT G
¼ INCH (SEE NOTE F.)
VALVE, CHECK (SEE NOTE E.)
TEE, MALE BRANCH, 1/8 NPTF(SEE
NOTE F.)
BALL, MANIFOLD PLUG (NOT
SHOWN.)
CAP, ¼ INCH FLARE W/O-RING(SEE
NOTES F AND G.)
VALVE CORE, SCHRADER (SEE
NOTE A.) (PART OF RA19916)
FITTING, ¼ MFL G 1/8 NPTF(SEE
NOTE F.)
SWITCH, HIGH PRESSURE CUTOUT
VALVE, CHECK (75 IN-LB) (SEE
NOTE F.)
Downloaded from www.Manualslib.com manuals search engine
Qty
---
Part No.
RA20018
Effectivity
A, B, C, D, E
530052
A, B, C, D, E
Ref. Only
F, G, K
546621
F, G, K
557696
H.J
1
123928
2
RA20009
3
122950
2
122917
1
1
RA20015
539654
5
Ref. Only
1
111098
1
Ref. Only
1
100272
1
RA19427
7
6
RA20016
A, B, C, D, E
F, G, H, J, K
PANZITTA SALES & SERVICE
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Wilkes-Barre, PA 18705
113
570-822-6720 800-822-6720
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
MANIFOLD ASSEMBLY
No.
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Description
SOLENOID, 12VDC, MANIFOLD (SEE
NOTE D.) (S1 THRU S12)
SOLENOID, 12VDC, MANIFOLD (SEE
NOTE D.) (S1, S2 AND S4 THRU S12)
FITTING, HALF UNION, .12 MP G .25
FL(SEE NOTE F.)
CONNECTOR, 1/8 NPTF G 1/8 PNEUMATIC (SEE NOTE F.)
TUBE, MANIFOLD CONNECTOR
(SEE NOTE C.)
SCREW, SOCKET HEAD (SEE NOTE
B.)
ACCUMULATOR TRANSDUCER
ELBOW, COMPRESSION, 1/8 NPTF G
¼ INCH (ON UNITS BUILT PRIOR TO
11-1-2008 WITH OIL INJECT.)
O-RING (SEE NOTE H.)
O-RING, CO873 2-240 (SEE NOTE
G.)
O-RING, PARKER P/N SB17-119-7N
(SEE NOTE G.)
O-RING, PARKER P/N SB17-143-7N
(SEE NOTE G.)
FILTER ELEMENT, COALESCING
BOWL, OIL SEPARATOR (SEE NOTE
A.)
UNION, 1/8 MP G 1/8MP G .97(SEE
NOTE F.)
EGCHANGER, HEAT
SHELL, ACCUMULATOR
FILTER DRIER, SPIN ON
MANIFOLD BLOCK, LOWER
ELBOW, COMPRESSION, 1/8 NPT G
1/4
PLUG, 1/8-27 NPTF SOCKET HD
(SEE NOTE F.) NOT SHOWN. (NONOIL INJECT UNITS ONLY.)
PLUG (NON-OIL INJECT UNITS
ONLY.)
114
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Qty
12
Part No.
RA20010
Effectivity
A, B, C, D, E,
H, J
F, G, K
11
RA20010
2
100740
2
121771
1
537991
1
10001
2
1
RA20066
119984
2
1
18190
539668
1
123785
1
123786
1
1
123787
Ref. Only
2
101307
1
1
1
1
1
523477
Ref. Only
34724
Ref. Only
539544
A. B, C, D, E
1
Ref. Only
F, G, H, J, K
1
546609
F, G, H, J, K
A, B, C, D, E,
H, J
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
MANIFOLD ASSEMBLY
No.
34
Description
O-RING 016-NITRILE-70 (SEE NOTE
G.) NOT SHOWN. (NON-OIL INJECT
UNITS ONLY.)
35
O-RING 008 NITRILE-70 DUR (SEE
NOTE G.) NOT SHOWN. (NON-OIL
INJECT UNITS ONLY.)
36
MANIFOLD BLOCK, TOP
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
1
Part No.
10302
Effectivity
F, G, H, J, K
1
10265
F, G, H, J, K
1
Ref. Only
A
B
C
D
E
F
G
H
J
K
MANIFOLD ASSEMBLY NOTES
A. Torque Shrader valve core (item 14) and Oil Bowl Separator (item 25) to 1.5-3.0 IN-LB.
B. Torque to 30 IN-LB.
C. Apply Loctite 242 to threads of Manifold Connection Tube (item 16), then torque to 75 IN-LB.
D. Torque Manifold Solenoids (item 13) to manifold at 75 (±5) IN-LB.
E. Torque Check Valve (item 12) to 75 (±5) IN-LB; 6-places.
F. Apply Loctite 565 on all pipe threads.
G. Lubricate all O-rings on components before assembly.
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
115
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
VACUUM PUMP
ss00138
2
3
1
4
5
6
7
Figure 3-7. Vacuum Pump
116
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
VACUUM PUMP ASSEMBLY
No.
---
Description
VACUUM PUMP ASSEMBLY, 1.5
CFM, 115VAC
VACUUM PUMP ASSEMBLY, 1.5
CFM, 230VAC
VACUUM PUMP ASSEMBLY, 3 CFM,
115VAC
1
RESERVOIR ASSEMBLY (NOTE:
ITEMS 1 THRU 7 ARE FOR THE 3
CFM PUMP ONLY. 1.5 CFM PUMPS
DO NOT HAVE REPLACEMENT
PARTS. 1.5 CFM PUMPS MUST BE
ORDERED AS A COMPLETE UNIT.)
2
BRASS DISCHARGE FITTING (PART
OF ITEM 1)
3
BRASS INLET FITTING (PART OF
ITEM 1)
4
SIGHT GLASS NUT (PART OF ITEM
1)
5
OIL FILL PLUG (PART OF ITEM 1)
6
SIGHT GLASS ASSY W/O-RING
(PART OF ITEM 1)
7
OIL DRAIN ASSEMBLY W/CAP (PART
OF ITEM 1)
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
1
Part No.
RA20031
RA20075
RA20017
1
RA19950
1
Ref. Only
1
Ref. Only
1
Ref. Only
1
1
RA20019
Ref. Only
1
Ref. Only
Effectivity
A, C, D, E, F,
G, H, J, K
B
A, C, D, E, F,
G, H, J, K
A
B
C
D
E
F
G
H
J
K
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
117
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
COMPRESSOR
ss00137
Discharge
Compressor Oil
Return (Suction)
Suction
1
Figure 3-8. Compressor
118
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34788 (Basic) Service Manual
Pa rt s and Co mp o n ents
COMPRESSOR ASSEMBLY, 115 AND 230V
No.
---
Description
COMPRESSOR, 115V (DOMESTIC)
COMPRESSOR, 230V (INT’L ONLY)
1
ELECTRICAL SERVICE KIT, 115V
(INCLUDES THERMAL PROTECTOR,
START RELAY, CAPACITOR, CAPACITOR CAP, AND CAPACITOR LEADS.)
ELECTRICAL SERVICE KIT, 230V
(INCLUDES THERMAL PROTECTOR,
START RELAY, CAPACITOR, CAPACITOR CAP, AND CAPACITOR LEADS.)
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
---
Part No.
RA20020
--1
RA20076
RA20060
RA20061
Effectivity
A, C, D, E, F,
G, H, J, K
B
A, C, D, E, F,
G, H, J, K
B
A
B
C
D
E
F
G
H
J
K
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
119
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
BASE ASSEMBLY
ss00144
1
6 2X
4 2X
3 2X
1
2X
2
2X 7
7X 8
Figure 3-9. Base Assembly
BASE ASSEMBLY
No.
--1
2
3
4
5
6
7
8
Description
BASE ASSEMBLY (SEE FIGURE 1
FOR NEGT HIGHER ASSEMBLY.)
BASE
COTTER PIN
WASHER, FLAT, .500 ID
WHEEL, PNEUMATIC, GRAY, 10
INCH
BUSHING, WHEEL
AGLE
CASTER, 5 INCH DIA G 2 INCH WIDE
SCREW, PLASTITE, ¼ INCH G 1
INCH
120
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Qty
1
Part No.
544094
1
2
2
2
Ref. Only
100723
102755
121841
2
1
2
8
Ref. Only
Ref. Only
RA19631
Ref. Only
Effectivity
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ELECTRICAL DIAGRAM
ss00149
Manifold
Assembly
ISV Assembly
Air Purge
Transducer
Accumulator
Transducer
Temperature
Probe
Low-Side
Transducer
S15 - Air
Purge
3
1
Scale
Assembly
4
J7
14
J11
J17
J13
J14
J8
Display/Control
Circuit Board
J5
S2 - HS Clear
S5 - HS Charge
S6 - LS Charge
S10 - Recover
S11 - Tank Fill
J18
J16
J9
J11
S1 - N Discharge
J6
J4
J1
13
SD Card
J1
S3 - Oil Inject
(when applicable)
S4 - DP Recover
S7 - HS Inlet
S8 - Vacuum
S9 - LS Inlet
S12 - Pwr Charge
S13 - Oil Return
S14 - Oil Drain
J2
HP Switch
5
J3
Vacuum
Pump
12
7
Power
Switch
J1
11
Circuit
Breaker
10
J2
12 Volt
Power
Supply
Compressor
9
8
Fan
Figure 3-10. Electrical Diagram (Sheet 1 of 2)
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
121
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ss00444
Sensor
Assembly
ISV Assembly
Manifold
Assembly
Air Purge
Transducer
Accumulator
Transducer
2
Temperature
Probe
Low-Side
Transducer
S3 - Thermistor
Solenoid
S4 - DP Recover
S7 - HS Inlet
S8 - Vacuum
S9 - LS Inlet
S12 - Pwr Charge
S13 - Oil
S14 - Oil Drain
S15 - Air
Purge
3
1
15
4
J7
Scale
Assembly
J12
J11
J20
J13
J19
J17
J15
J5
J14
Display/Control
Circuit Board
J8
J10
J16
J9
J11
J21
S1 - N Discharge
J6
14
SD Card
J1
S2 - HS Clear
S5 - HS Charge
S6 - LS Charge
S10 - Recover
S11 - Tank Fill
J18
J4
J1
13
HP Switch
J3
J2
5
Vacuum
Pump
12
7
Circuit
Breaker
J1
12 Volt
Power
Supply
Power
Switch
11
J2
Compressor
9
8
10
Figure 3-10. Electrical Diagram (Sheet 2 of 2)
122
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Fan
34788 (Basic) Service Manual
Pa rt s and Co mp o n ents
WIRING HARNESS DIAGRAM PARTS LIST
No.
1
2
3
4
5
6
7
8
9
10
11
12
Description
HARNESS, RELAY BOARD (J7, J8,
J13, J14) TO AIR PURGE, ACCUMULATOR, LOW SIDE TRANSDUCERS,
TEMPERATURE PROBE
HARNESS, VACUUM SENSOR (J15,
J19)
HARNESS, RELAY BOARD (J11) TO
S3 JEGCEPT GE-48800, 34788-H,
AND 48920], S4, S7, S8, S9, S12,
S13, S14
HARNESS, RELAY BOARD (J17
AND J18) TO S2, S5, S6, S10, S11
CHARGE, S1 DISCHARGE, AND S15
PURGE (USED WITH THE RA20013
WHICH IS OBSOLETE.)
HARNESS, RELAY BOARD (J17
AND J18) TO S2, S5, S6, S10, S11
CHARGE, S1 DISCHARGE, AND S15
PURGE (FOR ALL CURRENT PRODUCTION, AND RA2000.)
HARNESS, RELAY BOARD (J4) TO
HIGH PRESSURE SWITCH
HARNESS, COMPRESSOR PIGTAIL
WIRE (64, 66, 76) T0 COMPRESSOR
START RELAY, THERMAL SWITCH,
GROUND THROUGH HARNESS
539991 (NOT SHOWN.)
HARNESS, COMPRESSOR TO HARNESS 539989
HARNESS, RELAY BOARD (J6) TO
VACUUM PUMP, FAN, AND COMPRESSOR THROUGH HARNESS
539991
HARNESS, RELAY BOARD (J2) TO
POWER SUPPLY (J1, J2)
CABLE, GROUND WIRE
POWER CABLE, 115VAC
POWER CABLE, 230VAC
HARNESS, RELAY BOARD (J1 AND
J3) TO POWER SWITCH AND CIRCUIT BREAKER
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Qty
1
Part No.
539988
Effectivity
1
557700
H, J
1
539987
1
539927
549381
1
539992
1
544997
1
539991
1
539989
1
539994
1
1
539993
122770
1
545162
539990
A, C, D, E, F,
G, H, J, K
B
PANZITTA SALES & SERVICE
72 George Avenue
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570-822-6720 800-822-6720
123
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
WIRING HARNESS DIAGRAM PARTS LIST
No.
13
Description
HARNESS, DISPLAY/CONTROL (J11)
TO SD CARD (J1)
14
HARNESS, RELAY BOARD (J5) TO
DISPLAY/CONTROL PCB (J9)
15
HARNESS, RELAY BOARD (J16) TO
SCALE (PART OF SCALE ASSEMBLY
P/N 539853. SEE NHA, FIGURE 3-2.)
16
LEAD, CAPACITOR (NOT SHOWN.)
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
Qty
1
Part No.
539996
1
539995
1
Ref. Only
1
516844
Effectivity
A
B
C
D
E
F
G
H
J
K
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
124
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
PLUMBING DIAGRAM
ss00146
3
4 2X
7
6 2X
Vapor
8
Liquid
ISV Assembly
Vacuum Pump
1
Red Tube From
High Side Gauge
5
2
Manifold
Assembly
Blue Tube From
Low Side Gauge
Note: Use Locktite 242 Or Equivalent
On Threads Of All Hoses And Fittings
9 10
Oil Inject
Bottle
11
12 13
21 2X
Manifold
Assembly
14
15 2X
1.5
16
17 2X
Oil Drain
20
Bottle
18
Compressor
2X 19
Figure 3-11. Plumbing Diagram
PLUMBING DIAGRAM PARTS LIST
No.
---
1
2
3
4
Description
HOSE SET, SERVICE, HIGH AND
LOW SIDE, W/ADAPTERS (COMPRISED OF P/N 540331 [RED] AND
540332 [BLUE])
HIGH SIDE HOSE, RED
LOW SIDE HOSE, BLUE
VACUUM HOSE, LOW SIDE, TUBING, ¼ INCH OD G 0.040 INCH ID
NUT, COMPRESSION, ¼ INCH TUBE
Qty
1
Part No.
37422
1
1
19”
540331
540332
120225
2
RA20007
Effectivity
125
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
PLUMBING DIAGRAM PARTS LIST
No.
5
Description
VACUUM HOSE, HIGH SIDE, TUBING, 3/8 INCH HIGH PRESSURE
6
NUT, COMPRESSION, 3/8 INCH
TUBE
7
HOSE, ISV LIQUID
8
HOSE, ISV VAPOR
9
OIL INJECT TUBE, ¼ INCH OD G
0.040 INCH ID
10
NUT, COMPRESSION, ¼ INCH TUBE
11
HOSE, TANK FILL (FILTERED)
HOSE, TANK FILL (UNFILTERED)
12
VACUUM PUMP EGHAUST TUBE, ¼
INCH OD G 0.040 INCH ID
13
NUT, COMPRESSION, ¼ INCH TUBE
14
SUCTION TUBE, MANIFOLD TO
COMPRESSOR, 3/8 INCH HIGH
PRESSURE
15
NUT, COMPRESSION, 3/8 INCH
TUBE
16
DISCHARGE TUBE, COMPRESSOR
TO MANIFOLD
17
O-RING, NEOPRENE
18
COMPRESSOR OIL RETURN TUBE,
3/8 INCH HIGH PRESSURE
19
NUT, COMPRESSION, 3/8 INCH
TUBE
20
TUBE, NYLON, 1/8 INCH OD G .070
ID (SEE FIGURE 6, ITEM 1 FOR
COMPRESSION FITTING.)
21
STA-STRAP, 8 INCHES LONG G .18
THK
EFFECTIVITY:
ROBINAIR 34788
ROBINAIR 34788-I
CORNWELL RA-C34788
MATCO H234788
MAC AC34788
GENERAL MOTORS GE-48800
ROBINAIR 48920
HONDA 48920T
HONDA 48920U
ROBINAIR 34788-H
126
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Qty
16”
Part No.
RA20005
1
RA20006
1
1
23”
541533
539068
120225
1
1
1
28”
RA20007
567272
539007
120225
1
15.5”
RA20007
RA20005
2
RA20006
1
538469
2
12”
RA19916
RA20005
2
RA20006
27”
121773
2
Ref. Only
Effectivity
A, B, C, D, E
A, B, C, D, E
A
B
C
D
E
F
G
H
J
K
34788 (Basic) Service Manual
Pa rt s and Co mp o n ents
MAIN COMPONENT DESCRIPTIONS
12V POWER SUPPLY — Provides 12 Volts to power
the circuit boards, manifold block components, and the
ISV air purge solenoid.
BOTTLE, OIL DRAIN — Recovers the used oil during
the oil drain process.
BOTTLE, OIL INJECT — Stores oil for injection into
the A/C system. Not used on all models.
BREAKER, CIRCUIT — Protects the unit from drawing
too much current. If blown, unit is completely inoperative.
CALIBRATION BALL — Calibration standard that
attaches to magnet under scale assembly. Used to
verify scale calibration.
CASTER — 5” x 2” wheels used for maneuvering unit.
HIGH PRESSURE CUTOUT SWITCH — Switch
opens at 435 ± 10 psi (2999 ± 69 kPa) and resets at
320 ± 20 psi (2066 ± 137 kPa). If pressure in the high
side of the system exceeds 435 psi (2999 kPa), the
switch opens stopping all functions.
INTERNAL STORAGE VESSEL (ISV) — Storage tank
where the recovered and recycled refrigerant is stored.
Vapor, liquid, and air purge access is on-top of tank.
KEYPAD — Touch-pad cover for the front of the control board.
MANIFOLD BLOCK ASSEMBLY — Internal block
assembly that contains solenoids, check valves and
switches. Refrigerant will flow through the manifold
assembly for proper distribution.
CHECK VALVE — Allows flow in one direction only.
MUFFLER, AIR EXHAUST — Disperses excessive air
from the ISV. Provides effective reduction of objectionable air exhaust noise.
COMPRESSOR — Moves refrigerant from the A/C
system being serviced into the ISV on the unit.
ORIFICE, UNION — Fitting used to reduce the flow
rate.
COMPRESSOR CAPACITOR — Used for starting the
compressor. Helps reduce the initial high current demand required by the compressor on start-up.
POWER CORD — Supplies main power to the unit.
COMPRESSOR OIL SEPARATOR — Removes the
compressor oil from the refrigerant leaving the
compressor. New oil is returned to the compressor
when the oil return solenoid receives power.
PRESSURE RELIEF VALVE, 450 PSI — Spring loaded safety valve use to releases pressure from internal
tank assembly if pressure exceeds 450 psi.
RELAY BOARD — Relay control for all electrical components.
DISPLAY/CONTROL BOARD — Front display panel
and main control of the unit.
SCALE ASSEMBLY — Measures the amount of
refrigerant being charged and recovered.
DOOR LATCH KIT — Used to replace spring-loaded
latch, retainer, and door latch receptacle.
SD CARD PCB ASSEMBLY — Used to read information from Secure Digital (SD) memory cards.
FAN — Keeps the compressor’s electrical
components cool.
SIGHTGLASS – Used to view vacuum pump oil level.
FILTER DRIER, SPIN-ON — Used to remove moisture
and particles from refrigerant. Must be changed every
time 150 lbs of refrigerant is recovered.
SOLENOID (1), NORMAL DISCHARGE — When
energized, allows refrigerant flow from the compressor
to the system oil separator, then to the internal storage
vessel.
GAUGE, HIGH SIDE — Monitor high-side pressure of
the vehicle being serviced.
SOLENOID (2), HIGH-SIDE CLEAR — Energized
during the high-side clearing process.
GAUGE, LOW SIDE — Monitors low-side pressure of
the vehicle being serviced.
SOLENOID (3), OIL INJECT — Energized during the
Oil Inject process to allow A/C system oil to be
replenished. Not used on all models.
HEAD ASSEMBLY — User interface panel for controlling refrigerant recovery, recycling and recharging.
SOLENOID (4), DEEP RECOVER — When energized,
uses vacuum pump to perform “deep” recovery of
127
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P ar ts and C o m p o n e n t s
refrigerant from the system being serviced.
SOLENOID (5), HIGH-SIDE CHARGE — When
energized, allows refrigerant from ISV to enter highside of system being serviced.
SOLENOID (6), LOW-SIDE CHARGE — When
energized, allows refrigerant from ISV to enter low-side
of system being serviced.
SOLENOID (7), HIGH-SIDE INLET — Allows an open
“pathway” for refrigerant flow and vacuum between
the A/C system high side and the 34788 unit. This
solenoid is powered during the Recover, Vacuum, and
Leak Check process.
SOLENOID (8), VACUUM — When energized, allows
a vacuum or deep recovery to be pulled on the A/C
system being serviced.
SOLENOID (9), LOW-SIDE INLET — Allows an open
“pathway” for refrigerant flow and vacuum between the
A/C system low side and the unit. This solenoid is powered during the Recover, Vacuum and Flush process.
SOLENOID (10), RECOVERY — When energized,
provides the primary pathway of removing refrigerant
from the system being serviced. This solenoid is also
powered during the Flush process.
34788 (Basic) Service Manual
tor to the compressor and equalizes the pressure on
the high and low side of the compressor.
SOLENOID (14), OIL DRAIN — Energized at the end
of the Recover process to drain oil.
SOLENOID (15), AIR PURGE — Energized to allow
excessive air to be removed from the ISV.
SWITCH ON/OFF — Allows the unit to be turned ON
and OFF.
SYSTEM OIL SEPARATOR — Heat exchanger with
high-side coils that provide internal heat to the canister
causing saturated vapor and accumulated liquid refrigerants to evaporate. This process prevents liquid refrigerant from entering the compressor and separates the
refrigerant oil.
TEMPERATURE PROBE — Monitors the temperature
inside the ISV.
TRANSDUCER, ACCUM (SYSTEM OIL
SEPARATOR) — Measures the pressure within the
system oil separator.
TRANSDUCER, AIR PURGE — Measures the pressure within the ISV.
SOLENOID (11), TANK FILL — When energized during the Tank Fill process, allows refrigerant to flow from
the external supply tank to the ISV.
TRANSDUCER, LOW-/HIGH-SIDE — Measures the
pressure of incoming refrigerant from the A/C system.
Pressure readings are then relayed to the control
board.
SOLENOID (12), POWER CHARGE/FEEDBACK —
Provides “feedback” pressure to assist the oil drain
operation. Also, increases tank pressure to assist the
charging function.
VACUUM PUMP — Pump designed to remove
moisture and air from an A/C system. Also aids in the
recovery process by performing a deep recovery of
A/C system.
SOLENOID (13), OIL RETURN — When energized, it
returns compressor oil from the compressor oil separa-
WHEEL, PNEUMATIC 10” — Transport wheels.
128
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Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
ALPHABETICAL PARTS LIST
Description
No.
Qty
Part No.
ACCUMULATOR TRANSDUCER
AGLE
BALL, MANIFOLD PLUG
BASE
BASE ASSEMBLY
BASE ASSEMBLY
BEZEL (PART OF RA20001.)
BOLT, SERRATED HD, ¼-20 G ¡ INCH
BOLT, SERRATED HD, ¼-20 G 2-INCH
BOTTLE, OIL DRAIN
Fig.
No.
3-6
3-9
3-6
3-9
3-9
3-2
3-3
3-2
3-2
3-1
18
6
7
1
--52
10
20
48
5
2
1
5
1
1
1
1
2
4
1
RA20066
Ref. Only
Ref. Only
Ref. Only
544094
544094
539618
122255
119105
17756
BOTTLE, OIL DRAIN
BOTTLE, OIL INJECT
3-1
3-2
5
26
1
1
121588
115642
BOWL, OIL SEPARATOR
BRACKET (PART OF RA20086.)
BRASS DISCHARGE FITTING
BRASS INLET FITTING
BUSHING, HEYCO
BUSHING, WHEEL
CABLE, GROUND WIRE
CABLE, INTERCONNECT
CABLE, POWER
3-6
3-2
3-8
3-8
3-2
3-9
3-10
3-3
3-1
25
55
2
3
7
5
10
4
9
1
1
1
1
1
2
1
1
1
Ref. Only
Ref. Only
Ref. Only
Ref. Only
100385
Ref. Only
539993
539995
122770
CABLE, POWER
CABLE, SD BOARD
CAP, ¼ INCH FLARE W/O-RING
CAP, METAL, DRILLED, 38MM
3-1
3-3
3-6
3-2
9
21
8
35
1
1
1
1
545162
539996
111098
RA19914
CASTER, 5 INCH DIA G 2 INCH WIDE
CENTER DIVIDER
CIRCUIT BREAKER, 15 AMP
3-9
3-2
3-1
7
16
6
2
1
1
RA19631
545312
518638
CIRCUIT BREAKER, 7 AMP (INT’L ONLY)
COMPRESSOR ASSEMBLY, 115V (DOMESTIC)
3-1
3-2
6
46
1
1
552036
RA20020
Effectivity
A, B, C, D,
E, F, G, K
H, J
A, B, C, D,
E
H, J
A, C, D, E,
F, G, H, J, K
B
A, B, C, D,
E
A, C, D, E,
F, G, H, J, K
B
A, C, D, E,
F, G, H, J, K
129
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
No.
Qty
Part No.
Effectivity
COMPRESSOR ASSEMBLY, 230V (INT’L
ONLY)
COMPRESSOR OIL RETURN TUBE, 3/8
INCH HIGH PRESSURE
COMPRESSOR, 115V (DOMESTIC)
Fig.
No.
3-2
46
1
RA20076
B
3-11
18
12”
RA20005
3-7
---
---
RA20020
COMPRESSOR, 230V (INT’L ONLY)
CONNECTOR, 1/8 NPTF G 1/8 PNEUMATIC
COTTER PIN
DECAL
3-7
3-6
3-9
3-1
--15
2
15
--2
2
1
RA20076
121771
100723
515770
DECAL, 1-800 PHONE NUMBER
DECAL, 34724 FILTER REORDER
DECAL, 48920 CONTROL BOARD
DECAL, CONTROL PANEL, 34788
DECAL, CONTROL PANEL, 34788-I
DECAL, CONTROL PANEL, 48920
DECAL, CONTROL PANEL, GE-48800
DECAL, CONTROL PANEL, MAC AC34788
DECAL, FRONT
3-1
3-1
3-1
3-3
3-3
3-3
3-3
3-3
3-1
8
13
1
23
23
23
23
23
2
1
1
1
1
1
1
1
1
1
109076
540600
Ref. Only
540072
552110
Ref. Only
546987
541851
539901
DECAL, FRONT
DECAL, FRONT
DECAL, FRONT
DECAL, OVERLAY
DECAL, SERIAL NUMBER
DECAL, UL
DISCHARGE TUBE, COMPRESSOR TO
MANIFOLD
DOOR LATCH KIT
DOOR, REAR, SIDEWINDER
EDGE TRIM, RUBBER
ELBOW, 1/8 MP G 1/8 INCH PNEUMATIC
ELBOW, 1/8 MP G1/8 PNEUMATIC
ELBOW, COMPRESSION, 1/8 MP G 3/8
INCH PNEUMATIC
ELBOW, COMPRESSION, 1/8 NPT G 1/4
3-1
3-1
3-1
3-3
3-1
3-1
3-11
2
2
2
9
10
14
16
1
1
1
1
1
1
1
124244
123867
124241
539880
Ref. Only
557695
538469
3-2
3-1
3-2
3-3
3-6
3-6
41
16
53
7
1
3
2
1
A/R
2
1
3
RA19632
121575
Ref. Only
123928
123928
122950
3-6
31
1
539544
130
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A, C, D, E,
F, G, H, J, K
B
A, C, D, E,
F, G, H, J, K
H, J, K
A
B
G, H, J, K
F
E
A, B, F, G,
H, J, K
C
D
E
A. B, C, D,
E
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
Fig.
No.
3-6
No.
Qty
Part No.
Effectivity
19
1
119984
A, B, C, D,
E, H, J
3-7
1
1
RA20060
A, C, D, E,
F, G, H, J, K
3-7
1
1
RA20061
B
3-2
3
1
539025-1
ENCLOSURE HEAD, SHOULDER
ENCLOSURE, HEAD HINGE COVER
3-2
3-2
3
2
1
2
541750-1
539025-2
ENCLOSURE, HEAD HINGE COVER
ENCLOSURE, SWIVEL TOP, BACK
3-2
3-3
2
15
2
1
541750-2
539024-2
ENCLOSURE, SWIVEL TOP, BACK, RED
ENCLOSURE, SWIVEL TOP, FRONT
3-3
3-3
15
8
1
1
5417419-2
539024-1
ENCLOSURE, SWIVEL TOP, FRONT, RED
ENCLOSURE, SWIVEL TOP, POCKET
3-3
3-3
8
20
1
1
541749-1
539024-4
ENCLOSURE, SWIVEL TOP, POCKET, RED
ENCLOSURE, SWIVEL, TOP, SIDE COVER
3-3
3-3
20
18
1
1
5417419-4
539024-3
ENCLOSURE, SWIVEL, TOP, SIDE COVER,
RED
EGCHANGER, HEAT
FAN ASSEMBLY, 115V
3-3
18
1
541749-3
A, B, F, G,
H, J, K
C, D, E
A, B, F, G,
H, J, K
C, D, E
A, B, F, G,
H, J, K
C, D, E
A, B, F, G,
H, J, K
C, D, E
A, B, F, G,
H, J, K
C, D, E
A, B, F, G,
H, J, K
C, D, E
3-6
3-2
27
33
1
1
523477
RA17416
3-2
3-6
3-6
3-6
3-6
33
29
24
10
4
1
1
1
1
2
RA17516
34724
123787
100272
122917
ELBOW, COMPRESSION, 1/8 NPTF G ¼
INCH (ON UNITS BUILT PRIOR TO 11-12008 WITH OIL INJECT.)
ELECTRICAL SERVICE KIT, 115V (INCLUDES THERMAL PROTECTOR, START
RELAY, CAPACITOR, CAPACITOR CAP, AND
CAPACITOR LEADS.)
ELECTRICAL SERVICE KIT, 230V (INCLUDES THERMAL PROTECTOR, START
RELAY, CAPACITOR, CAPACITOR CAP, AND
CAPACITOR LEADS.)
ENCLOSURE HEAD, SHOULDER
FAN ASSEMBLY, 230V (INT’L ONLY)
FILTER DRIER, SPIN ON
FILTER ELEMENT, COALESCING
FITTING, ¼ MFL G 1/8 NPTF
FITTING, COMPRESSION, 1/8 NPT G ¼
INCH
A, C, D, E,
F, G, H, J, K
B
131
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
No.
Qty
Part No.
FITTING, HALF UNION, .12 MP G .25 FL
FITTING, R134A, HIGH SIDE
FITTING, R134A, LOW SIDE
FITTING, SPECIAL
FITTING, SPECIAL
FITTING, STRAIGHT
FITTING, STRAIGHT THROUGH
Fig.
No.
3-6
3-2
3-2
3-2
3-2
3-4
3-2
14
12
13
9
10
9
37
2
1
1
1
1
1
1
100740
546882
546883
546871
546872
210312
123616
FITTING, TEE, .25FP G .25FP G .25MP
FITTING, TEE, 1/8FP G 1/8FP G 1/8MP
FRONT PANEL ASSEMBLY
3-4
3-5
3-1
7
7
3
1
1
1
508690
508690
544023
FRONT PANEL ASSEMBLY
FRONT PANEL ASSEMBLY
GAUGE, HIGH SIDE
GAUGE, LOW SIDE
GROMMET, COMPRESSOR (PART OF
RA20020 AND RA20076.)
HARNESS, COMPRESSOR PIGTAIL WIRE
(64, 66, 76) T0 COMPRESSOR START
RELAY, THERMAL SWITCH, GROUND
THROUGH HARNESS 539991 (NOT
SHOWN.)
HARNESS, COMPRESSOR TO HARNESS
539989
HARNESS, DISPLAY/CONTROL (J11) TO
SD CARD (J1)
HARNESS, RELAY BOARD (J1 AND J3) TO
POWER SWITCH AND CIRCUIT BREAKER
HARNESS, RELAY BOARD (J11) TO S3 [EGCEPT GE-48800 AND 48920], S4, S7, S8,
S9, S12, S13, S14
HARNESS, RELAY BOARD (J16) TO SCALE
HARNESS, RELAY BOARD (J17 AND J18)
TO S2, S5, S6, S10, S11 CHARGE, S1
DISCHARGE, AND S15 PURGE (FOR ALL
CURRENT PRODUCTION, AND RA2000.)
3-1
3-1
3-3
3-3
3-2
3
3
2
1
51
1
1
1
1
4
544250
122293
RA19787
RA19786
Ref. Only
3-10
6
1
544997
3-10
7
1
539991
3-10
13
1
539996
3-10
12
1
539990
3-10
3
1
539987
3-10
3-10
15
4
1
1
Ref. Only
549381
132
Downloaded from www.Manualslib.com manuals search engine
Effectivity
A, B, C, D,
E
A, B, F, G,
K
C, D, E
H, J
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
Fig.
No.
3-10
No.
Qty
Part No.
4
1
539927
3-10
9
1
539994
3-10
5
1
539992
3-10
14
1
539995
3-10
8
1
539989
3-10
1
1
539988
3-10
3-2
2
1
1
1
557700
Ref. Only
HEAD ASSEMBLY
3-2
1
1
RA20080
HEAD ASSEMBLY
HEAD ASSEMBLY
HEAD ASSEMBLY, 48920T AND 48920U
HEAD ASSEMBLY, BASIC
3-2
3-2
3-3
3-3
1
1
-----
1
1
-----
Ref. Only
Ref. Only
Ref. Only
RA20080
HEAD ASSEMBLY, BRANDED
HIGH SIDE HOSE, RED
HOSE SET, SERVICE, HIGH AND LOW
SIDE, W/ADAPTERS (COMPRISED OF P/N
540331 [RED] AND 540332 [BLUE])
HOSE, FLUSHING
HOSE, ISV LIQUID
HOSE, ISV VAPOR
HOSE, TANK FILL (FILTERED)
HOSE, TANK FILL (FILTERED)
HOSE, TANK FILL (UNFILTERED)
HOSE, TANK FILL (UNFILTERED)
3-3
3-11
3-11
--1
---
--1
1
Ref. Only
540331
37422
3-2
3-11
3-11
3-2
3-11
3-2
3-11
8
7
8
32
11
32
11
1
1
1
1
1
1
1
546946
541533
539068
566452
566452
539007
539007
HARNESS, RELAY BOARD (J17 AND J18)
TO S2, S5, S6, S10, S11 CHARGE, S1 DISCHARGE, AND S15 PURGE (USED WITH
THE RA20013 WHICH IS OBSOLETE.)
HARNESS, RELAY BOARD (J2) TO POWER
SUPPLY (J1, J2)
HARNESS, RELAY BOARD (J4) TO HIGH
PRESSURE SWITCH
HARNESS, RELAY BOARD (J5) TO DISPLAY/CONTROL PCB (J9)
HARNESS, RELAY BOARD (J6) TO VACUUM PUMP, FAN, AND COMPRESSOR
THROUGH HARNESS 539991
HARNESS, RELAY BOARD (J7, J8, J13,
J14) TO AIR PURGE, ACCUMULATOR, LOW
SIDE TRANSDUCERS, TEMPERATURE
PROBE
HARNESS, VACUUM SENSOR (J15, J19)
HEAD ASSEMBLY
Effectivity
H, J
A, B, F, G,
K
A, B, F, G,
K
C, D, E
H, J
H, J
A, B, F, G,
K
C, D, E
133
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
No.
Qty
Part No.
INSERT, DIE-CUT FOAM
ISV ASSEMBLY
Fig.
No.
3-2
3-2
45
18
1
1
541742
Ref. Only
ISV ASSEMBLY
ISV ASSEMBLY, DOMESTIC
3-2
3-4
18
---
1
---
Ref. Only
Ref. Only
ISV ASSEMBLY, INT’L
KEYPAD (RA20001 SHOWN)
3-5
3-3
--12
--1
Ref. Only
RA20001
KEYPAD (RA20001 SHOWN)
LATCH, DOOR (PART OF RA19632)
LEAD, CAPACITOR (NOT SHOWN.)
LOCKNUT, ¼-20
LOCKNUT, ¼-20
LOW SIDE HOSE, BLUE
MAGNET
MANIFOLD ASSEMBLY
3-3
3-2
3-10
3-2
3-2
3-11
3-2
3-6
12
44
16
22
47
2
23
---
1
2
1
4
4
1
1
---
557635
Ref. Only
516844
Ref. Only
Ref. Only
540332
539903
RA20018
MANIFOLD ASSEMBLY
3-6
---
---
530052
MANIFOLD ASSEMBLY NOTE: MANIFOLD
NO LONGER AVAILABLE. NOT USED AFTER 11-1-2008.
MANIFOLD ASSEMBLY
3-6
---
---
Ref. Only
3-2
38
1
RA20018
MANIFOLD ASSEMBLY
MANIFOLD ASSEMBLY
MANIFOLD ASSEMBLY (EARLIER VERSION OF RA20018.)
MANIFOLD ASSEMBLY, 48920T
MANIFOLD BLOCK, LOWER
MANIFOLD BLOCK, TOP
MANUALS, OPERATION
MANUALS, OPERATION
MANUALS, OPERATION
MANUALS, OPERATION
MANUALS, OPERATION
MANUALS, OPERATION
3-2
3-2
3-2
38
38
38
1
1
1
557696
Ref. Only
530052
3-6
3-6
3-6
3-1
3-1
3-1
3-1
3-1
3-1
--30
36
12
12
12
12
12
12
--1
1
1
1
1
1
1
1
557696
Ref. Only
Ref. Only
539680
539602
541844
541846
541845
539602
134
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Effectivity
A, C, D, E,
F, G, H, J, K
B
A, C, D, E,
F, G, H, J, K
B
A, B, C, D,
E, F, G, K
H, J
A, B, C, D,
E
A, B, C, D,
E
F, G, K
A, B, C, D,
E
H, J
F, G, K
A, B, C, D,
E
H.J
A, F
B
C
D
E
G
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
No.
Qty
Part No.
Effectivity
MANUALS, OPERATION
MANUALS, OPERATION
MUFFLER, AIR EGHAUST
MUFFLER, AIR EGHAUST
NUT, 1/4 FLARE
NUT, 8-32 SEMS
NUT, 8-32 SEMS
NUT, COMPRESSION, ¼ INCH TUBE
NUT, COMPRESSION, ¼ INCH TUBE
Fig.
No.
3-1
3-1
3-4
3-5
3-2
3-2
3-2
3-11
3-11
12
12
5
5
56
28
57
4
10
1
1
1
1
1
2
2
2
1
557701
560826
519605
519605
113564
112414
112414
RA20007
RA20007
H, J
K
NUT, COMPRESSION, ¼ INCH TUBE
NUT, COMPRESSION, 3/8 INCH TUBE
NUT, COMPRESSION, 3/8 INCH TUBE
NUT, COMPRESSION, 3/8 INCH TUBE
NUT, HEG, 10-32, SEMS
NUT, NYLON (PART OF RA19914)
3-11
3-11
3-11
3-11
3-3
3-2
13
6
15
19
3
36
1
1
2
2
4
1
RA20007
RA20006
RA20006
RA20006
112415
522722
OIL DRAIN ASSEMBLY W/CAP
OIL FILL PLUG
OIL INJECT TUBE, ¼ INCH OD G 0.040
INCH ID
ORIFICE, UNION, .026
ORIFICE, UNION, .026
O-RING
O-RING
3-8
3-8
3-11
7
5
9
1
1
23”
Ref. Only
RA20019
120225
3-4
3-5
3-2
3-2
4
6
11
27
1
1
3
1
539804
539804
10267
112699
O-RING
3-6
O-RING 008 NITRILE-70 DUR NOT SHOWN. 3-6
(NON-OIL INJECT UNITS ONLY.)
O-RING 016-NITRILE-70 NOT SHOWN.
3-6
(NON-OIL INJECT UNITS ONLY.)
O-RING, CO873 2-240
3-6
O-RING, NEOPRENE
3-11
O-RING, PARKER P/N SB17-119-7N
3-6
O-RING, PARKER P/N SB17-143-7N
3-6
PCB ASSEMBLY, DISPLAY/CONTROL
3-3
BOARD
20
35
2
1
18190
10265
F, G, H, J, K
34
1
10302
F, G, H, J, K
21
17
22
23
13
1
2
1
1
1
539668
RA19916
123785
123786
RA20012
A, B, C, D,
E
A, B, C, D,
E
A, B, C, D,
E
A, B, C, D,
E
A, B, C, D,
E, F, G
135
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
PCB ASSEMBLY, DISPLAY/CONTROL
BOARD
PCB ASSEMBLY, RELAY BOARD
PCB ASSEMBLY, RELAY BOARD (BEFORE
11-1/2008)
PCB ASSEMBLY, SD CARD, NGEN RRR
PLUG (NON-OIL INJECT UNITS ONLY
PRIOR TO 11-1-2008.)
PLUG, 1/8-27 NPTF SOCKET HD NOT
SHOWN. (NON-OIL INJECT UNITS ONLY
PRIOR TO 11-1-2008.)
POWER CABLE, 115VAC
POWER CABLE, 230VAC
POWER SUPPLY, 12 VOLT
PRESSURE RELIEF, 450PSI
RECEPTACLE, DOOR LATCH (PART OF
RA19632)
RESERVOIR ASSEMBLY
RETAINER, DOOR LATCH (PART OF
RA19632)
RUBBER BUMPER
SCALE ASSEMBLY
SCREW, 6-19 G ¡ EH TORG PLASTITE
SCREW, ¼ -20 G ¢ INCH
SCREW, ¼-20 G ¢ INCH
SCREW, ¼-20 G 1 INCH
SCREW, ¼-20 G 3-1/2 INCH
SCREW, 1/4 G 1/2 INCH
SCREW, 10-16 G 3/4 INCH
SCREW, 6-32 G 1/4 INCH
SCREW, 6-32 G 3/8 INCH
SCREW, 8-32 G 3/8 INCH SEMS
SCREW, MACH, 6-32 G 3/16 INCH
SCREW, PLASTITE, ¼ INCH G 1 INCH
SCREW, PLASTITE, ¼ G ¢ INCH
SCREW, PLASTITE, ¼ G ¢ INCH
SCREW, PLASTITE, ¼ G ¢ INCH
136
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Fig.
No.
3-3
No.
Qty
Part No.
Effectivity
13
1
539665
H, J
3-2
3-2
29
29
1
1
RA20070
RA20013
F, G
3-3
3-6
16
33
1
1
539649
546609
F, G, H, J, K
3-6
32
1
Ref. Only
F, G, H, J, K
3-10
11
1
122770
3-10
3-2
3-4
3-2
11
59
6
43
1
1
1
2
545162
RA20014
RA20079
Ref. Only
A, C, D, E,
F, G, H, J, K
B
3-8
3-2
43
42
1
2
RA19950
Ref. Only
3-2
3-2
3-3
3-1
3-2
3-2
3-2
3-2
3-2
3-2
3-3
3-2
3-3
3-9
3-2
3-2
3-2
14
19
19
4
4
6
39
40
34
30
14
58
11
8
15
17
25
1
1
6
5
4
3
1
1
2
4
4
1
6
8
1
7
2
122256
RA20002
121711
121829
121829
Ref. Only
Ref. Only
109556
122257
Ref. Only
Ref. Only
514514
515022
Ref. Only
123497
123497
123497
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
SCREW, PLASTITE, ¼ G ¢ INCH
SCREW, SOCKET HEAD
SCREW, SOCKET HEAD CAP M3.5 G 5
SCREW, THD FORM, ¼-20 G ¡ INCH PHD,
PH
SENSOR ASSEMBLY
SHELF, VACUUM PUMP
SHELL, ACCUMULATOR
SIDE SUPPORT ASSEMBLY
SIGHT GLASS ASSY W/O-RING
SIGHT GLASS NUT
SLEEVE, COMPRESSOR (PART OF
RA20020 AND RA20076.)
SOLENOID, 12VDC, DISCRETE
SOLENOID, 12VDC, DISCRETE
SOLENOID, 12VDC, DISCRETE (S13 AND
S14)
SOLENOID, 12VDC, MANIFOLD (S1 THRU
S12)
SOLENOID, 12VDC, MANIFOLD (S1, S2
AND S4 THRU S12)
STA-STRAP, 3-3/4”G3/32” WIDE
STA-STRAP, 8 INCHES LONG G .18 THK
STATION PUMP, 3 CFM, 115V
STATION PUMP, 3 CFM, 230V (INT’L ONLY)
STRAP, HOOK AND LOOP
SUCTION TUBE, MANIFOLD TO COMPRESSOR, 3/8 INCH HIGH PRESSURE
SWITCH, HIGH PRESSURE CUT-OUT
SWITCH, POWER, DPST (I/O)
TAG, POWER CABLE
TANK, ISV
TANK, ISV
TEE, MALE BRANCH 1/8 NPTF
TEE, MALE BRANCH, 1/8 NPTF
TEMPERATURE PROBE
TEMPERATURE PROBE
Fig.
No.
3-2
3-6
3-2
3-3
No.
Qty
Part No.
62
17
60
17
7
1
4
4
121829
10001
RS-9100
231728
3-2
3-2
3-6
3-2
3-8
3-8
3-2
54
24
28
61
6
4
50
1
1
1
1
1
1
4
RA20086
545466
Ref. Only
546620
Ref. Only
Ref. Only
Ref. Only
3-4
3-5
3-6
10
1
2
1
1
2
RA20009
RA20009
RA20009
3-6
13
12
RA20010
3-6
13
11
RA20010
3-3
3-11
3-2
22
21
5
3
2
1
109695
Ref. Only
RA20031
3-2
3-1
3-11
5
11
14
1
1
15.5”
RA20075
121925
RA20005
3-6
3-1
3-2
3-4
3-5
3-4
3-6
3-4
3-5
11
7
31
13
8
3
6
1
2
1
1
1
1
1
1
1
1
1
RA19427
RA19343
112661
539477
543184
539654
539654
539472
539472
Effectivity
H, J
A, B, C, D,
E, H, J
F, G, K
A, C, D, E,
F, G, H, J, K
B
137
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P ar ts and C o m p o n e n t s
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
TRANSDUCER, AIR PURGE
TRANSDUCER, AIR PURGE
TUBE, 1/8 INCH BLUE, 4 FEET LONG
TUBE, 1/8 INCH RED, 4 FEET LONG
TUBE, MANIFOLD CONNECTOR
TUBE, NYLON, 1/8 INCH OD G .070 ID
UNION, 1/8 MP G 1/8MP G .97
UNIT, BASIC, 34788, 115 VAC (DOMESTIC)
UNIT, BASIC, 34788, 115 VAC (DOMESTIC)
UNIT, BASIC, 34788-H, 115 VAC
UNIT, BASIC, 34788-H, 115 VAC
UNIT, BASIC, 34788-I, 230 VAC (INT’L
ONLY)
UNIT, BASIC, 34788-I, 230 VAC (INT’L
ONLY)
UNIT, BASIC, HONDA 48920T
UNIT, BASIC, HONDA 48920T
UNIT, CORNWELL, H234788, 115 VAC
UNIT, CORNWELL, H234788, 115 VAC
UNIT, GENERAL MOTORS, GE-48800, 115
VAC
UNIT, GENERAL MOTORS, GE-48800, 115
VAC
UNIT, HONDA, 48920U, 115 VAC
UNIT, HONDA, 48920U, 115 VAC
UNIT, MAC, AC34788, 115 VAC
UNIT, MAC, AC34788, 115 VAC
UNIT, MATCO, RA-C34788, 115 VAC
UNIT, MATCO, RA-C34788, 115 VAC
UNIT, ROBINAIR, 48920, 115VAC
UNIT, ROBINAIR, 48920, 115VAC
VACUUM HOSE, HIGH SIDE, TUBING, 3/8
INCH HIGH PRESSURE
VACUUM HOSE, LOW SIDE, TUBING, ¼
INCH OD G 0.040 INCH ID
VACUUM PUMP ASSEMBLY, 1.5 CFM,
115VAC
138
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Fig.
No.
3-4
3-5
3-3
3-3
3-6
3-11
3-6
3-1
3-2
3-1
3-2
3-1
No.
Qty
Part No.
Effectivity
2
4
6
5
16
20
26
-----------
1
1
1
1
1
27”
2
-----------
RA20067
RA20067
RA20004
RA20003
537991
121773
101307
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
A
A
K
K
B
3-2
---
---
Ref. Only
B
3-1
3-2
3-1
3-2
3-1
-----------
-----------
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
H
H
C
C
F
3-2
---
---
Ref. Only
F
3-1
3-2
3-1
3-2
3-1
3-2
3-1
3-2
3-11
----------------5
----------------16”
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
Ref. Only
RA20005
J
J
E
E
D
D
G
G
3-11
3
19”
120225
3-2
5
1
RA20017
A, C, D, E,
F, G, H, J, K
Pa rt s and Co mp o n ents
34788 (Basic) Service Manual
ALPHABETICAL PARTS LIST
Description
VACUUM PUMP ASSEMBLY, 1.5 CFM,
115VAC
VACUUM PUMP ASSEMBLY, 1.5 CFM,
230VAC
VACUUM PUMP ASSEMBLY, 1.5 CFM,
230VAC
VACUUM PUMP ASSEMBLY, 3 CFM,
115VAC
VACUUM PUMP ASSEMBLY, 3 CFM,
115VAC
VACUUM PUMP EGHAUST TUBE, ¼ INCH
OD G 0.040 INCH ID
VALVE CORE, SCHRADER(PART OF
RA19916)
VALVE, BALL
VALVE, BALL
VALVE, BALL
VALVE, BALL
VALVE, CHECK (75 IN-LB)
VALVE, CHECK (75 IN-LB)
VALVE, CHECK (SEE NOTE E.)
WASHER, FENDER, ¼ INCH ID
WASHER, FENDER, ¼ INCH ID
WASHER, FLAT ¼ INCH
WASHER, FLAT, .500 ID
WHEEL, PNEUMATIC, GRAY, 10 INCH
Fig.
No.
3-8
No.
Qty
Part No.
Effectivity
---
1
RA20017
3-2
5
1
RA20075
A, C, D, E,
F, G, H, J, K
B
3-8
---
1
RA20075
B
3-2
5
1
RA20031
3-8
---
1
RA20031
A, C, D, E,
F, G, H, J, K
A, C, D, E,
F, G, H, J, K
3-11
12
28”
120225
3-6
9
1
Ref. Only
3-4
3-4
3-4
3-5
3-6
8
11
12
3
12
1
1
1
1
7
540322
539799
539798
544672
RA20016
3-6
3-6
3-2
3-2
3-2
3-9
3-9
12
5
21
49
63
3
4
6
1
4
8
7
2
2
RA20016
RA20015
Ref. Only
Ref. Only
12719
102755
121841
A, B, C, D,
E
F, G, H, J, K
PANZITTA SALES & SERVICE
72 George Avenue
Wilkes-Barre, PA 18705
570-822-6720 800-822-6720
www.panzittasales.com
139
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