Graco 231-033 Instructions-Parts List Manual page 36

WARNING
To reduce the risk of serious injury, follow the Pres-
sure Relief Procedure warning on page 24 when-
ever you are instructed to relieve pressure.
NOTE: Read the GENERAL REP AIR INFORMATION
on page 24 before doing this procedure.
205
216
224
219
Fig 36–1
*209
*213
THROAT
PACKINGS
*208
Fig 36–2
224
*206
*225
211
Fig 36–3
Fig 36–4
DISPLACEMENT PUMP REPAIR
220
221*
INTAKE
204*
VALVE
202*
223
207*
219
210*
212*
PISTON
ASSEMBLY
215*
203*
214*
222
A
B
218
219
NOTE: Use Packing Repair Kit 222–588. An asterisk
following a reference number , i.e., (210*), indi-
cate that the part included in the kit. For the best
results, use all the new parts in the kit even if the
old ones still look good.
NOTE: Clean and inspect parts after disassembling the
pump. Replace worn or damaged parts.
Disassembling the Pump
1. See page 38 to remove the pump.
2. Unscrew the intake valve (223) from the cylinder
(219). Remove all parts. See Fig 36–1.
3. If no further service is needed, reassemble the intake
valve. Be sure you use a new gasket (202*).
4. Remove the packing nut (216) and plug (205). See
Fig 36–1.
5. Use a plastic mallet to tap the piston rod (224) down,
then pull the rod out through the bottom of the
cylinder (219). See Fig 36–1.
6. Remove the throat packings and glands.
36–2.
7. Clamp the flats of the piston rod in a vise. Loosen the
retaining nut (211). Unscrew the piston valve (222)
from the rod. Remove all parts from the piston valve
(222). See Fig 36–3.
8. Remove and clean the sleeve (218). Use ONLY the
special sleeve removal tool, P/N 222–586.
WARNING
Always use the special sleeve removal tool to re-
move the sleeve. Other removal methods could
cause the pump to rupture, resulting in serious
bodily injury. If the sleeve cannot be removed easily
using the tool, return the sleeve and cylinder to your
Graco distributor for removal.
9. Screw the large nut (B) of the tool into the top of the
cylinder (19). Screw down the rod (A) to push the
sleeve out. Remove the tool. See Fig 36–4 .
Reassembling the Pump
NOTE: Alternate leather and plastic packings as shown
in Fig 37–1. The lips of the throat "V" packings
must face down. The lips of the piston "V" pack-
ings must face up. The lips of the U–cup seal
(203*) face down. Incorrect installation damages
the packings and results in pump leaking.
NOTE: Soak leather packings in oil before using them.
1. Check the outside of the piston rod (224) and the in-
side of the sleeve (218) for scoring or scratches. If
these parts are damaged, new packings will not seal
properly. Replace these parts if needed.
2. Stack the backup washer (214), seal (203*), female
gland (215*), alternate packings (212*,206*), and
then male gland (210*) onto the piston valve (222).
See Fig 36–3.
See Fig