Reassembling The Pump - Graco A Series Instructions-Parts List Manual

Fig. 6. Remove throat packings and glands from
manifold. Discard throat packings and glands.
Fig. 6
WARNING
COMPONENT RUPTURE HAZARD
Do not clean or wipe the piston valve
threads. Cleaning the piston valve
threads could destroy the plastic patch
and cause the piston valve to come loose during
operation, causing pump bursting and possible
serious bodily injury.
Fig. 7. Unscrew piston valve from piston rod. Clean
and inspect parts. The piston has a plastic sealing
patch. Do not remove the patch. The patch allows four
disassembly/assembly procedures before it is
necessary to apply Loctiter to the threads.
Fig. 7
6
308815
Service
Fig. 8. Remove packings and glands from piston rod.
Fig. 8

Reassembling the pump

Fig. 9. Soak all leather packings in SAE 30W oil for 1
hour minimum prior to assembly. Stack male gland
9678A
(219) on piston rod. Alternately stack UHMWPE (208)
and leather (218) packings (note orientation) on piston
rod. Install female gland (217). Install backup washer
(216) and u-cup (209) (note orientation) 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.
Fig. 9
Fig. 10. Install ball (206) in piston rod. If Loctiter is
used, ensure no Loctiter gets on ball.
9677A
Fig. 10
219
218 208
206
9680A
217 209
216
210
9679A
9681A