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16 309411
Displacement Pump
Removal
1. Flush pump.
2.
Relieve pressure; page 6.
3. Fig. 11. Cycle pump with piston rod (222) in its
lowest position.
4. Fig. 11. Remove suction tube (73) and hose (167).
Fig. 11
7672B
222
167
73
5. Fig. 12. Use screwdriver: push retaining spring up
and push out pin (58).
Fig. 12
7675B
58
6. Fig. 13. Loosen jam nut by hitting firmly with a
20 oz (maximum) hammer. Unscrew pump.
Fig. 13
7673B
Repair
See manual 309277 for pump repair instructions.
Installation
WARNING
If pin works loose, parts could break off due to
force of pumping action. Parts could project
through the air and result in serious injury or prop-
erty damage. Make sure pin and retaining spring
are properly installed.
CAUTION
If the pump jam nut loosens during operation, the
threads of the bearing housing will be damaged.
Make sure jam nut is properly tightened.
1. Fig. 14. Pull piston rod out 1.5 in. Screw in pump
until holes in bearing cross link and piston rod
align.
Fig. 14
7676B
1.5 in.
2. Fig. 12. Push pin (19) into hole. And push retaining
spring into groove all the way around connecting
rod.
3. Fig. 15. Screw jam nut down onto pump until
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 (maxi-
mum) hammer to approximately 75" 5 ft–lb (102
Nm).
Fig. 15
7673B
4. Fig. 16. Fill packing nut with Graco TSL, through
one of the slits, until fluid flows onto the top of
seal.
Fig. 16
7677B