Graco 16X423, Repair Manual

Page: 12 / 20

Service
12 333028E
15. Soak all leather packings in SAE 30W oil for one hour
minimum prior to assembly. Stack male gland (219)
on piston rod. Alternately stack UHMWPE (208)and
leather (218) packings (note orientation) on piston
rod. Install female gland (217). Install piston wiper
(216) and backup washer (229) (note orientation) on
piston valve (210). The special sealing patch on pis-
ton valve threads is good for four repackings. Use
thread sealant on piston valve threads after four
repackings.
16. Install ball (206) in piston rod.
NOTE: If thread sealant is applied to piston valve
threads, make sure none gets on ball. Install piston
valve on piston rod. Torque as follows:
17. Grease piston packings.
18. Slide piston assembly into bottom of sleeve. Make
sure V-packing and u-cup are not rolled over or
damaged.
Mark IV and Mark VII models: Install
o-ring (231) on sleeve spacer (230). Install sleeve
spacer on sleeve.
19. Grease top inch or two of piston rod that will go
through the cylinder throat packings.
Models Torque
16Y598, 16X428 27 ± 3 ft-lb (36.6 ± 4.1 N•m)
16Y706, 16Y601,
16X429
55 ± 3 ft-lb (74.6 ± 4.1 N•m)
16X423, 16X425 100 ± 5 ft-lb (136 ± 7 N•m)
210
218
206
208
219
217
229
216
ti3941a
Not
used on
16Y598,
16X428
ti7575b
206
NOTICE
Do not slide piston assembly into top of sleeve as this
may damage piston packing.
ti7578c
ti7341a
ti7579a