REPLACEMENT PARTS MANUAL
national
2000
SERIES
AIR SUSPENSION SEAT
Service Manual for All
National 2000 Series Seats
National Seating Company
200 National Drive
Vonore, TN 37861
(800) 222-7328
(423) 884-6651
(423) 884-6166 fax
www.nationalseating.com
Catalog # 7456-396-10N
©2000 National Seating
1
COMFORT ADJUSTMENTS
STANDARD FEATURES
The National 2000 Air Suspension Seat is equipped with features that adjust for
maximum comfort and safety. Not all of these features are available on each model.
Seat Track
Rear Cushion
Adjuster
Seat Height &
Single Lumbar
Armrest
Adjustment
PREMIUM FEATURES
Front Cushion
Standard Adjuster
Seat Height,
Back & Seat
Bolsters,
Triple Lumbar
Chugger Lockout:
Handle up, unlocked
Cushion and
Back Heater
Seat Height
Triple Lumbar
Seat Swivel:
Release lock,
turns inward
2
REPLACEMENT PARTS LIST
NATIONAL 2000
The Replacement Parts are separated into sections of
the seat to ease identification and selection.
SECTION 1
SECTION 4
SECTION 3
SECTION 2
SECTION 6
SECTION 5
HOW TO USE THIS MANUAL.
Parts are identified by Item No on the illustration. Quantities for seat models are in the table
application blocks (columns ABC). Special requirements or instructions are identified in the
Description section as footnotes. Seat Model Applications are below..
APPLICATION
DESCRIPTION
ITEM
PART NO
NO
A B C
1
2
3
4
1234567-08
24567-556
678456-02
Seat specific
1
1
1
1
2
1
1
2
1
Part with one model application
Part with use on models B & C
Part with different quantities on models
Unique part number: call National Seating
Seat model Application Letter
Seat Model
Letter
High Back
A
Mid Back
B
Mid Back w/HR
C
3
ILLUSTRATED PARTS BREAKDOWN: Section 1
1
2
3
5A
1
2
4
5B
6
8
17
14
7
12
13
9 11
ITEM
NO
15 18
16A
16B
11 10
Please be sure to include part number of the seat when ordering parts.
APPLICATION
DESCRIPTION
PART NO
A
1
2
3
4
5A
5B
6
7
8
9
10
11
12
13
14
15
16A
16B
17
18
Seat specific
Seat specific
Seat specific
Seat specific
230203-01
230203-03
230203-05
SK-1025-07
SK-1192-07
224371-05
224371-03
177058-25
177060-49
177060-71
230684-01
230679-01
230667-03
230667-01
224378-01
224377-09
ITEM
PART NO
B
C
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
6
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
APPLICATION
Upholstered Back Assembly
Back Cover
Intermediate Back Poly-20”
High Back Poly-20”
Int. Back Frame Assembly
Int. Back Frame Assembly for Headrest
High Back Frame Assembly
Knob Kit - Back Recline
Install Back to Lower Frame
Bolt, Shoulder
Bolt, Shoulder
Washer, Wave
Nut, Self Locking, 5/16-18
Nut, 5/16 - 18, locking
Bolt, Shoulder 3/8-16x1”
Back Plate Assy
Recline Limiting Bracket, 6 to 23 deg
Recline Limiting Bracket, 2 to 15 deg
Bolt,
Bolt, 5/16 - 18 x .68”
DESCRIPTION
4
NO
19
20
230659-01
230660-01
A
B
C
1
-
1
1
High Back Crash Pad
Lo-Mid Back Crash Pad
5
ILLUSTRATED PARTS BREAKDOWN: Section 2
Seat Serial
No. Location
ITEM
NO
PART NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
Seat specific
SK-965-05
229723-01
224357-01
226635-01
228152-01
SK-1193-07
P229-7
324686-03
321740-05
221192-05
224377-07
177060-49
SK-1035-07
231037-11 LH/-12 RH
231037-13
177063-39
230228-03
230393-03
227546-05
177001-17
SK-1289
231037-09 LH/-10 RH
APPLICATION
A
B
DESCRIPTION
C
1
1
1
Lower Frame Assy
1
1
1
Chugger Kit
1
1
1
Chugger Support
1
1
1
Chugger Support Frame
4
4
4
Roller Bearing
2
2
2
5/16 - 18 Nut & Washer Assy
1
1
1
Chugger Lockout Kit
1
1
1
Track Kit
1
1
1
Track, Slave
1
1
1
Track, Locking
1
1
1
Knob, Track
4
4
4
Bolt, Square neck
4
4
4
Nut, Track Attachment
1
1
1
Front Cushion Adjuster Kit, 2 position
1
1
1
Front Cushion Adjuster Kit, 6 position
1
1
1
Rear Cushion Adjuster
*
*
*
Cap, Cushion Adjuster Rod
*
*
*
Knob, Rear/Front Cushion Adjuster
*
*
*
Cover, Knob Cushion Adjuster
*
*
*
Handle, Front Cushion Adjuster
*
*
*
Screw #10 X ¾
*
*
*
Spring
1
1
1
Front Cushion Adjuster Kit, 3 position
*Quantity seat specific
6
ILLUSTRATED PARTS BREAKDOWN: Section 3
1
2
3
4
ITEM
NO
PART NO
1
2
3
4
5
Seat specific
Seat specific
Seat specific
227488-01
427482-01
APPLICATION
A
B
C
1
1
1
3
1
1
1
1
3
1
1
1
1
3
1
5
DESCRIPTION
Upholstered Cushion Assembly
Cushion Cover
Poly, Cushion
Webbing
Cushion Frame
ILLUSTRATED PARTS BREAKDOWN: Section 4
1
2
3A (3B opposite)
5
6
4A (4B Opposite)
4C (4D Opposite)
ITEM
NO
PART NO
1
2
3A
3B
4A
4B
4C
4D
5
6
Seat specific
Seat specific
230661-01
230661-02
229981-01
229981-02
229981-03
229981-04
229728-01
222976-01
APPLICATION
A
1
1
1
1
1
1
1
1
B
1
1
1
1
1
1
1
1
DESCRIPTION
C
1
1
1
1
1
1
1
1
Upholstered Arm Assembly
Armrest Cover
Poly, Armrest, Left
Poly, Armrest, Right
Armrest Mechanical Assembly LH - 20”
Armrest Mechanical Assembly RH - 20”
Armrest Mechanical Assembly LH - 18”
Armrest Mechanical Assembly RH - 18”
Disk, Nylon, Armrest Pivot (1 per arm)
Clip, Spring, Armrest (1 per arm)
Note: Armrests are an optional feature for some seats. Contact NSC for more information.
7
ILLUSTRATED PARTS BREAKDOWN: Section 5
17
14
13
15
12
10
9
3
18
19 13
14
16
7
20
5
8
6A
6B
11
16
4
13
14
1
2
22
ITEM
PART NO
NO
1
2
3
4
5
6A
6B
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Seat Specific
230574-01
230241-01
230691-01
230385-01
317107-01
317107-07
SK-582-2
SK-1277
177070-28
180027-03
180021-37
SK-735
221599-01
177070-07
Seat specific
230386-01
177095-03
Seat specific
177032-63
177060-49
Seat specific
422696-29
21
APPLICATION
A
B
C
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
1
8
2
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
1
8
2
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
1
8
2
1
4
4
1
1
DESCRIPTION
Base Assembly
Lower Base Assembly
Upper Base Assembly
Bumper Stop - STD
Upper Arm Assy, w/bushings
Lower Arm Assy, w/bushings
Lower Arm Assy, F/LTD Up-Stop
Shock Kit, Heavy Duty
Air Spring Kit
Lock Washer
Air Fitting, 90 Degree
Lock clip
Shaft Kit
Shaft
Snap Ring
Belt Bar
Bushings, Arm Spacer
Bolt, Self Tapping
Swivel
Bolt
Nut, Locking
Skirt Kit
Bellows Kit
8
ILLUSTRATED PARTS BREAKDOWN: Section 5 (cont’d)
ITEM
NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PART NO
APPLICATION
A
B
DESCRIPTION
C
SK-582-2
1
1
1
Shock Kit (Service Kit)
177032-09
1
1
1
3/8-24 X 1 3/4 Hex Head Bolt
177060-05
1
1
1
3/8-24 Thin Locknut
230032-01*
1
1
1
Upper 96 Base Assembly
225890-01*
1
1
1
Upper Arm Assembly with Bushing - 96
317125-01*
2
2
2
Arm Assembly with Bushings - 4” Travel - 96
230033-01*
1
1
1
Lower 96 Base Assembly
212342-03
1
1
1
Bumper - Down Stop
SK-777
1
1
1
Air Spring Kit for 96 & 97 Bases
SK-639
1
1
1
96 & 97 Shaft Kit
427114-07*
1
1
1
96 Base Assembly
422518-01*
1
1
1
Upper 97 Base Assembly
422517-01*
1
1
1
Lower 97 Base Assembly
317128-01*
1
1
1
Upper Arm Assembly with Bushings - 97
317125-01*
1
1
1
Lower Arm Assembly with Bushings - 97
422487-13*
1
1
1
97 Base Assembly
*These base components are for aftermarket series seats only.
For all others, the seat serial number is required.
9
ILLUSTRATED PARTS BREAKDOWN: Section 6
This section uses the number of air valves instead of
seat style to determine components usage.
11
12
8 (7 not shown)
6 (4 plcs)
1
14 13
2
2
Route air supply hose down center
of base and exit thru down stop
bumper. If equipped with swivel,
enter thru center hub.
5
4
12
14
10
13
12
9
14
13
Seat Height
Triple Lumbar
PART NO
NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
180027-49
180027-53
180027-07
180027-55
180027-57
229800-01
230202-01
230662-01
230766-03
230767-03
230768-03
180027-09
230914-07
230914-09
231016-07
231016-09
231016-11
AIRVALVES
2
4
6
1
1
1
1
1
1
1
-
5
1
1
1
1
3
1
-
2
3
5
1
1
4
1
1
1
1
5
1
Seat Height
Single Lumbar
DESCRIPTION
1/8” T Fitting
elbow, Plastic Fitting
Tie Strap
Tubing, Clear, 2.83 Feet
Tubing, Green, 2.67 Feet
Air Bolster
Single Chamber Lumbar Bag
Triple Chamber Lumbar Bag
Manifold Assy, 2 Button
Manifold Assy, 4 Button
Manifold Assy, 6 Button
Tubing, Black, 1.5 Feet
Air Valve, High Pressure, Red Handle
Air Valve, Low Pressure, Grey Handle
Single Chamber Installation including items 7 & 12
Triple Chamber Installation including items 8 & 12
Triple Chamber Installation w/bolsters including
items 1,2,4,5,6,8,& 12
Note: Seat configuration determines which components are installed and the quantities. A visual inspection of your seat
should provide most information using the above illustration as a guideline. National Seating can provided information
specifically for your seat, based on the seat part number, if you are not able to determine which components are installed.
1) Bolsters are secured with glue. Removal can damage the poly. Damaged or worn poly should be replaced.
2) Comfort valves (gray handle) are low pressure and interchangeable between locations. Seat height valve
(red handle) is high pressure can cause damage to comfort components. Do not switch red and gray valves.
3) Item 13 & 14 contain air valve use decals. Apply after installing the valve and before use.
10
ILLUSTRATED PARTS BREAKDOWN: Section 7
1
2
3
4
ITEM
NO
PART NO
1
2
3
4
Seat specific
Seat specific
428450-01
325043-01
APPLICATION
A
B
C
-
-
1
1
1
1
DESCRIPTION
Headrest Assembly
Cover, headrest
Poly and Frame Assembly
Bushing Kit
11
4)
WHEN ADJUSTMENT IS SATISFACTORY, TIGHTEN LOCKNUTS
(ITEM 2) TO 14 TO 17 FT. LBS. TORQUE.
12