Displacement
Pump
Removing the pump See
Fig 1
1 and parts list.
1.
Flush pump, if possible, and relieve pressure
again. Stop pump with piston rod in its lowest
position, if possible.
2.
Remove hose (132).
3.
Push retaining spring (35) up and push out
pin (20).
4.
Loosen locknut (38) and unscrew pump one half
turn from bearing housing (27).
5.
Remove spring clip (75) and drain tube (79) from
pump.
6.
Remove pump.
Repairing the pump
1. See
manual 307–806 for parts and repair
.
Installing the pump
See Figs. 1
1, 12, and parts
list.
1.
Screw displacement pump into bearing housing
(27) until pin hole in connecting rod assembly (29)
and displacement rod (A) align. Install pin (20).
2.
Continue to screw pump into bearing housing until
top threads of pump cylinder are flush with face of
bearing housing, and outlet nipple (75) is straight
back. Unscrew pump 1/2 turn so pump outlet is at
rear
. Push retaining spring (35) into groove around
connecting rod to prevent it from vibrating loose.
T
ighten locknut (38) to 95 N.m (70 ft-lb).
WARNING
MOVING P
ARTS HAZARD
If the pin works loose, it or other parts
could break of
f due to the force of the
pumping action. These parts could be
projected through the air and result in serious
bodily injury or property damage, including damage
to the pump, connecting rod or bearing housing.
CAUTION
If the locknut (38) loosens during operation, the
threads of the bearing housing (29) will be damaged.
Be sure to tighten the locknut firmly
.
3.
Install spring clip (75) and drain tube (79) to pump.
4. T
ighten packing nut/ wet-cup just enough to stop
leakage, but no tighter
. Fill wet-cup/packing nut 1/3
full with Graco TSL.
Fig 11
35
20
38
39
27
A
04348A
132
Fig 12
02083
27
38
20
35
29
1
2
1
2
Torque
to 95
N.m
Face of bearing housing
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