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

18
307-863
Displacement Pump
WARNING
To reduce the risk of serious bodily injury always
follow the Pressure Relief Procedure W arning on
page 2 before checking, adjusting, cleaning or
shutting down the sprayer .
Removing the pump See Fig. 1 1.
1. Flush the pump. Relieve pressure.
2. Hold the intake valve (223) with a wrench and un-
screw
the suction tube (30). Remove the hose (59).
For upright carts , remove the spring 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.
Disassembling the pump
1. Unscrew the intake valve (223) and remove all parts.
See Fig. 1 1.
2. Remove the plug (205). Unscrew the packing nut
(216).
See Fig. 12.
3. Tap the piston rod (224) down and then pull it out the
bottom of the cylinder (219). See Fig. 12.
4. Remove the throat packings. See Fig. 12.
5. Clamp the flats of the piston rod (224) in a vise. Loos -
en the piston (222). Unscrew the nut (211) from the
piston.
Remove the piston packings.
WARNING
T o reduce the risk of serious bodily injury from
pump rupture, use only tool 222–586 to remove
the sleeve. If the sleeve is stuck, send the cylinder
to your Graco distributor for removal.
6. Remove the sleeve whenever your service the
pump. Use special tool, Part No. 222–586 only.
Screw the nut (H) into the cylinder (219). Screw down
the rod (J) to push the sleeve out. See Fig. 13.
Fig. 11
21
26
25
27
59
223
224
204*
219
220
221*
202*
57
101
102
103
30
01200A
Fig. 12
*213
*209
216
205
*208
222
211
219
224
0026
207*
Fig. 13
219
H
J
0028