Service
3A6584A 13
17. Grease piston packings.
NOTE: Do not slide piston assembly into top of sleeve as this
may damage piston packing.
18. Slide piston assembly (with force) 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 (232).
Install sleeve spacer on sleeve.
19. Grease top inch or two of piston rod that will go
through the cylinder throat packings.
20. Grease o-ring (221 and 234) and place on sleeve.
Slide sleeve/piston rod assembly into bottom of
cylinder. Replace o-ring (207) if desired.
O-ring (207) is not required for safe pump operation.
21. Torque seal and packing nut (202) to the following:
Remove o-ring when pump packings begin to leak
after extended use. Then tighten packing nut down
until leakage stops or reduces. This allows
approximately 100 gallons of additional operation
before a repacking is required.
Models Torque
16Y598, 17H828 100 ± 10 in-lb
(11.3 ± 1.1 N•m)
16X423, 17H831, 17H830, 16Y706,
17H829, 25E689
140 ± 10 in-lb
(15.8 ± 1.1 N•m)
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