ULTRA^^ PRESSURE CONTROL a ~ 3 0 7 - 7 0 1
CIRCUIT BOARD REPLACEMENT"""'"
INSTRUCTIONS
Rev A
This manual contain8 IMPORTANT
WARNINGS and INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
PRESSURE CONTROL less circuit board
Pert No. 218-353, for all 230 Volt Sprayers
pert NO. 218-354, for Ultra 433, 100 Volt Sprayer
Part No. 218-396, for Ultra
100 Volt Sprayer
400.
CIRCUIT BOARD
Part No. 218-355, for all 230 Volt Sprayers
Pert No. 218-356, for all 100 Volt Sprayers
WARNING
Pressure Relief Procedure.
To reduce the risk of injection or serious bodily injury from moving parts or electric shock when installing,
removing, cleaning or repairing any part of the sprayer and whenever shutting off the sprayer: (1) Engage gun
safety latch, 12) turn ON/OFF switch to OFF, (3) unplug power supply cord, (4) disengage gun safety and trigger
gun into waste container maintaining firm metal to metal contact to relieve pressure. 15) Engage the gun safety.
16) Repeat Steps 4 and 5 for secondary hose, if used. (7) Open drain valve, having container ready to catch fluid.
(8) Leave drain valve open until you are ready to spray again. (9) If the hose or spray tip is clogged, follow this
procedure, then SLOWLY loosen the tip guard retaining nut or hose coupling slightly to relieve pressure
gradually before loosening comDletely.
ENGAGE SAFETY
TURN SWITCH TO OFF
UNPLUG CORD
DISENGAGE SAFETY
AND TRIGGER GUN:
ENGAGE SAFETY AGAIN
GRACO INC. P.O. Box 1441 MINNEAPOLIS. MN
@COPYRIGHT 1984 GRACO INC.
OPEN DRAIN VALVE
65440-1444
CIRCUIT BOARD REPLACEMENT
Tools Needed:
To remove the board from the box, pull out the
black plastic-tipped pin (330). Push the boftom of
the circuit board toward the wall of the box and
carefully slide the board out.
5. Install the board in the box at the same angle as it
was removed.
6. Reconnect ell wires. Refer to the wiring diagram on
page 3.
4.
Phillips screwdriver
Needle nose pliers
WARNING
Relief Procedure Warning on the front cover to
reduce the risk of an injection injury, injury from
moving parts, or electric shock. Be sure to unplug
CAUTION
1. Remove the pressure control cover and screws.
2. Turn the pressure control knob all the way counterclockwise to the minimum setting to release spring
tension on the board. Also check.to be sure only
three or four threads of the pressure control knob
shaft are exposed below the pressure adjustment
nut (SI.Backdown the nut, if necessary. See Fig 1.
CAUTION
Be sure the flat blade of the insulated male connectors are centered exactly in the wraparound
blade of the female connector when connections
are made.
Route all wires carefully to avoid interference with
the circuit board, bourdon tube and pressure control cover.
Step 2 is essential to reduce the risk of damaging
the circuit board while removing or installing it.
These precautions are essential to reduce the risk
of malfunction.
3. DisconnectALL wires from the board, including the
two heavy black wires. Pay close attention to where
7. Perform the Stall Pressure Calibration on page 5 i
you installed a new board.
connections are made.
Fig 1
' '
WIRING DIAGRAM
ALL PRESSURE CONTROLS AND CIRCUIT BOARDS
rONlOFFSWlTCH
THESE WIRES ARE CONNECTED
TO TWO TERMINALS ON THE OTHER
SIDE OF THE ONlOFF SWITCH
CIRCUIT BOARD
.'
MICROSWITCH
'P18
MOTOR
YELLOWlQREEN
QROUNO WIRE
307-701
3
PRESSURE CONTROL REPLACEMENT (Refer to Fig 3)
Tools Needed:
Phillips screwdriver
13 mm ( 1 / 2 ) open end wrench
19 mm 13/4") open end wrench
Adjustable wrench
Small screwdriver
WARNING
Relief. Procedure Warning on the front cover to
reduce the risk of an injection injury, injury from
moving parts, or electric shock. Be sure to unplug
1. Disconnect the main fluid hose (23) and the secondary fluid hose, if used, from the sprayer.
2. Disconnect the fluid hose (47) from between the
displacement pump outlet nipple (46)and pressure
control inlet elbow (88).
3. Loosen the filter bracket nut (85)and washer (13)
a 19 mm open end wrench.
... . using
.
Holdthe'pressure control adapter 186) firmly with a
19 mm oDen end wrench. Use an adiustable
wrench to loosen the swivel union (79), then
remove the fluid filter (48).
5. Remove the pressure control cover and screws
(36,871, and disconnect the four motor leads at the
appropriate terminals.
6. Refer to "Circuit Board Replacement" on page 2,
remove the circ,uit board and retain.
7. Remove the conduit (22).
8. Use a 13 mm open end wrench to loosen and
remove the pressure control mounting screws (44)
and washers 140) located below the Dressure control box. Remove the box.
9. Install the new pressure control assembly in the
reverse order of disassembly.
4
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10. Perform the Stall Pressure Adjustment Procedure
on page 5, before regular operation of the sprayer.
4
307-701
Fig 3
PRESSURE CONTROL CALIBRATION
USE EXTREME CAUTION WHEN PERFORMING THIS CALIBRATION PROCEDURE to reduce the risk of
an injection injury or other serious bodily injury which can result from component rupture, electric shock, fire, explosion, or moving parts.
,
This procedure sets the Ultra 433 sprayer to 210' bar
(3000 psi) MAXIMUM WORKING PRESSURE and
the Ultra 400 sprayer to 192 bar (2750 psi) MAXIMUM WORKING PRESSURE.
This procedure must be performed whenever a new
or used circuit board or pressure control assembly is
removed and reinstalled or replaced to be sure the
sprayer is properly calibrated.
.
.
NEVER ammpt to increase the fluid outlet pressure
by performing this calibration in any other way.
NEVER EXCEED the stated MAXIMUM WORKING
PRESSURE OF YOUR SPRAYER. Normal operation
of the sprayer at higher pressures could result in
component rupture, fire or explosion.
AVOID touching the wires in the pressure control
assembly when the control box cover is removed to
reduce the risk of electric shock.
Improper calibration can cause the sprayer to overpressurize and result in component rupture, fire or
explosion. It may also prevent the sprayer from obtaining the maximum working pressure which would
result in poor sprayer performance.
Tools Needed:
Phillips screwdriver
9 mm ignition wrench
Stell Pressure Adjustment (See Fig 4)
NOTE: Perform this procedure only after completing "Overpressurization Shutoff Adjustment" unless otherwise instructed in
another procedure.
1. Turn the sprayer switch to OFF. Turn the pressure
control knob counterclockwise to the minimum setting. Disengage the gun safety latch and trigger the
gun into a waste container until pressure is relieved.
Engage the gun safety latch.
2. Use a 9 mm ignition wrench to turn the pressure adjustment nut IS) counterclockwise about two full
turns.
3. With the pressure control knob at the minimum setting, turn the sprayer switch ON.
CAUTION
Topreventpump corrosion, flush the water out of
the pump, hose and gun with mineral spirits. Be
sure to close the drain valve, first. Use the lowest
pressure necessary to flush. Relieve the pressure
as stated in the WARNING, above. Leave the
mineral spirits in the pump to protect it until you
are aready to spray again.
ON/OFFSWITCH7
THE SPRAYER SHOULD NOT STARTI
If it does start, shut the sprayer switch OFF,
disengage the gun safety latch, trigger the gun into a
waste container until pressure is relieved. Engage the
gun safety latch. Turn the pressure adjustment nut
( S )a little further counterclockwise. Turn the sprayer
on to be sure it does not start.
4. Slowly turn the pressure control knob clockwise to
the maximum setting and hold it there. Use a 9 mm
ignition wrench to slowly turn the pressure adjustment nut ( S ) clockwise until the test gauge reads
EXACTLY 210 bar (3000 psi) for the Ultra 433 and
EXACTLY 192 bar (2750 psi) for the Ultra 400.
5. The calibration procedure is now completed.
WARNING
Relieve the fluidpressure in the sprayer. Turn the
sprayer switch to OFF. Disengage the gun safety
latch. Trigger the gun into a waste container until
pressure is relieved. Engage the gun safety latch.
Open the drain valve and have a container ready
to catch the fluid.
Fig 4
307-701
5
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THE GRACO WARRANTY
Graco Inc. warranta all equipment manufactured by it and bearing its name to be free from defects in
material and workmanship undar normal use and sawica. This warranty extends to the original purchasar
for a period of 12 months from the data of purchase and applies only when the equipment is installad and
operated in accordance with written factow recommendations. This warranty dons not cover damage or
wear whish, in the reasonable 'udgmem of Graco, arises from misusa, abrasion, corrosion, negligence,
accident, substitution of non-draco pans,-faulty installation or tempering.
This warranty. is conditioned upon the prepaid return of tha equipment claimed to be defective for
Examination by Graco to verify the claimed defect. If the claimed defect is variiied, Graco will repair or
replace frae of charge, any defective paFb.'Tha Equipment will be returned to the original purchaser
transwnation prepaid. If inspection of the aquipmant does not disclose any defect in workmanship or
matarial, rapairs will be made at a reasonabte charge and return transporntion will be charged.
EQUIPMENT NOT COVERED BY GRACO WARRANTY. Accessories or components of equipment sold
by Graco that Era not manufactured by G r a m (such as electric motors, switchas, hose, atc.i ara subject
to tha warranty, if any. of their manufacturer. Graco will provide purchasar with reasonable assistance in
making such claims.
Factory Branches:Atianta. Dallas. Dstroit. Los Angsles. Wmst Caldwrll (N.J.1
Subsidiary end Afflilate Campanles.Cmnmdm; England Switzerland, Frmnce; Germany; Hong Kong; Japan
GRACO INC.
P. 0. Box 1441 MINNEAPOLIS, MN 55440-1444
PRINTED I N U.S.A. m-ml 681
.