Graco A Series Additional Maintenance And Repair Instructions page 5

WARNING
COMPONENT RUPTURE HAZARD
Do not clean or wipe the piston valve
threads. Cleaning the piston valve
threads could destroy the special sealing
patch and cause the piston valve to come loose
during operation, causing pump bursting and
possible serious bodily injury.
Fig. 6. Unscrew piston valve from piston rod. Clean
and inspect parts. The piston has a special thread
locking/sealing patch. Do not remove the patch. The
patch allows four disassembly/assembly procedures
before it is necessary to apply Loctiter to the threads.
ti6183a
Fig. 6
Fig. 7. Remove packings and glands from piston rod.
Not
used on
287512
Fig. 7
Fig. 8. Remove throat packings and glands from cylin-
der. Discard throat packings and glands.
Service
Not used
on
287512
Fig. 8
Assembling the pump
Fig. 9. Soak all leather packings in SAE 30W oil for 1
hour minimum prior to assembly. Stack male gland
(204) on piston rod. Alternately stack UHMWPE (208)
and leather (218) packings (note orientation) on piston
rod. Install female gland (217). Install piston wiper
(216) (note orientation) and backup washer (229) on
piston valve (210). The special sealing patch on piston
valve threads is good for four repackings. Use Loctiter
on piston valve threads after four repackings.
Not
used on
287512
ti6185a
Note: pump 249122 and 289590 do not use
leather packings in piston stack. Alternately
ti6184a
stack blue (208) and brown (218) packings
on this pump.
Fig. 9
ti6182a
218 204 208
210
229
216
217
310894 5