Graco GM 3500 - DISPLACEMENT PUMP; Pump Removal Procedure; Pump Disassembly Steps

~~;~~,~~~,~~~~~~~~~~~~~~~~~~~~~~~~~~ D I S PUC E
WARNING
To reduce the risk of serious bodily injury, alwaysfol-
low the Pressure Relief Procedure Warning on
page 13 before repairing the sprayer.
Removing the pump. See
F/g 18-1.
1. Flush the pump. Relieve pressure.
2. Hold the intake valve (223) with a wrench and
unscrew the suction tube
(30). Remove the
hose
(59). ForuDriaht carts,removethespring
clips (101,103) and drain hose (102).
3. Push the retaining spring (26) up. Push the pin
(25
) out the rear.
4. Loosen the locknut (27). Unscrew the pump.
See Disassembling the pump, below.
Dlsassembllng the pump.
1. Unscrewthe intakevalve (223) andremoveall
parts.
See F;g 18-1.
2. Remove the plug (205). Unscrew the packing
nut (216).
See Ffg 18-2.
3. Tap the piston rod (224) down and then pull it
out the bottom of the cylinder (219). See
F;g
18-2.
4. Remove the throat packings. See Fig 18-2.
5. Clamp the fiats of the piston rod (224) in a vise. Loos-
ton. Remove the piston packings.
en the piston (222). Unscrewthe nut (21 1) from the pis-
Fig
18-2
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