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Repair
312766N 19
Pump Lower Reassembly
1. Lubricate packing (17) and bearing (18)
with no. 2 lithium-based grease.
2. Install the bearing (18), and cup packing
(17) with the lips facing down on the pump
connecting rod (37). See F
IG
. 18.
3. Lubricate the piston seals (21) and bearing
(22) with no. 2 lithium-based grease. Install
one piston seal (21) with the lips facing
down, bearing (22), and second piston seal
(21) with lips facing up on the piston (23).
Install the backup washer (20) with the
grooves facing down. See F
IG
. 17 on page
18.
4. Place the ball (3) on top of the piston body
(23) and screw the piston body and the
fluid piston rod (19) together. Torque to
30-35 ft-lb (41-48 N•m). Screw the piston
valve housing (29) onto the lower connect-
ing rod (19). See F
IG
. 17 on page 18.
5. Install the seal (51), with the lips facing
down, in the displacement pump frame
(36), then install bearing (31).
6. Use a turning motion to maneuver and
install the pump connecting rod (37) and
piston back into the pump frame (36). See
F
IG
. 14 on page 17.
7. Install piston cylinder (58).
a. For Series A and B Pumps: Support the
pump frame (36) with a strap wrench.
Lubricate o-ring (57) lightly with grease
and apply loctite to threads of pump cyl-
inder (58). Torque to 10-15 ft-lbs
(13.5-20 N•m).
b. For Series C Pumps: Support the pump
frame (36) with wrench flats. Lubricate
o-ring (57) lightly with grease and apply
loctite to threads of pump cylinder (58).
Torque to 30-35 ft-lbs (41-48 N•m).
F
IG
. 19
TI17181a
51
36
31
Install seal (51) from the bottom of the
pump frame (36) with insert tool
24B917.
F
IG
. 20: Series A and B
F
IG
. 21: Series C
36
58
TI21638b
57
36
58
TI21637a
57