Graco 231–034 Instructions And Parts List page 37

Displacement Pump Repair
205
216
224
219
Fig. 30
*209
*213
B
*208
Fig. 31
224
*206
*225
211
Fig. 32
Fig. 33
220
221*
A
204*
202*
223
207*
219
210*
212*
C
215*
203*
214*
222
04232
A
B
218
219
NOTE: Use the Packing Repair Kit, Part No. 222–588.
An asterisk following a reference number indicates that
the part included in the kit. For the best results, use all
of the parts in the kit, even if the old parts still look
good.
NOTE: Clean and inspect the parts after disassem-
bling the pump. Replace the worn or damaged parts.
WARNING
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 4 whenever
you are instructed to relieve the pressure.
Disassemble the Pump.
1. Relieve the pressure.
2. Remove the pump. See page 36.
3. Unscrew the intake valve assembly (A) from the
cylinder (219). Remove all of the parts. See Fig.
30.
4. If no further service is needed, reassemble the
intake valve assembly. Use a new gasket (202*).
5. Remove the packing nut (216) and the plug (205).
See Fig. 30.
6. Use a plastic mallet to tap the piston rod (224)
down. Pull the rod out from the bottom of the
cylinder (219). See Fig. 30.
7. Remove the throat packings and the glands (B).
See Fig. 31.
8. Clamp the flats of the piston rod (224) in a vise.
Loosen the nut (211). Unscrew the piston valve
(222) from the rod. Remove all the parts from the
piston assembly (C). See Fig. 32.
9. Remove the sleeve (218), using the sleeve remov-
al tool, Part No. 222–586. Clean the sleeve and
the cylinder.
WARNING
Always use the special sleeve removal tool, Part
No. 222–586, to remove the sleeve. Other tools or
methods could cause the pump to rupture, resulting
in serious injury. If the sleeve cannot be removed
easily, return the sleeve and the cylinder to your
Graco distributor for removal.
10. Screw the large nut (B) of the tool in to the top of
the cylinder (19). Screw down the rod (A) to push
the sleeve out of the cylinder. Remove the tool.
See Fig. 33 .