30887416
Displacement Pump
Removal
1. Fig. 16. Flush pump.
2.
Relieve pressure; page 5.
3. Cycle pump until piston rod (A) is in its lowest
position.
4. Remove suction/drain hose (27).
A
Fig. 16
8828A
27
5. Fig. 17. Use screwdriver: push retaining spring up
and push out pin (82).
Fig. 17
7675B
82
6. Fig. 18. Loosen locknut by hitting firmly with a
20 oz (maximum) hammer. Unscrew pump.
Fig. 18
7673B
Repair (See manual 308798 for pump repair instructions)
Installation
WARNING
If pin works loose, parts could break off due to
force of pumping action and project through the air
and cause serious injury or property damage.
CAUTION
If the pump locknut loosens during operation, the
threads of the bearing housing will be damaged.
1. Fig. 19. Pull piston rod out 1.5 in. Screw in pump
until holes in bearing cross link and piston rod
align.
Fig. 19
7676B
1.5 in.
2. Fig. 17. Push pin (82) into hole, and push retaining
spring into groove around connecting rod.
3. Fig. 20. Screw jam nut down onto pump until nut
stops. Screw pump up into bearing housing until it
is stopped by jam nut. Back off pump and jam nut
to align pump outlet to back. Tighten jam nut by
hand, then tap 1/8 to 1/4 turn with a 20 oz hammer
to approximately 75" 5 ft–lb (102 Nm).
Fig. 20
7673B
4. Fig. 21. Fill packing nut with Graco TSL, through
the slit, until fluid flows onto the top of seal.
Fig. 21
7677B
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