Displacement Pump
Removal
1. Flush pump.
2.
Relieve pressure; page 4.
3.Fig. 12. Cycle pump with piston rod (222) in its lowest position.
4.Fig. 12. Remove suction tube (107) and hose (47).
222
47
107
Fig. 12 | 7672B |
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5. Fig. 13. Use screwdriver: push retaining spring up and push out pin (19).
Repair
See manual 308798 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 jamnut is properly tightened.
1.Fig. 15. Pull piston rod out 1.5 in. Screw in pump until holes in bearing cross link and piston rod align.
1.5 in.
Fig. 15 | 7676B |
14308864
19
Fig. 13 | 7675B |
6.Fig. 14. Loosen jam nut by hitting firmly with a 20 oz (maximum) hammer. Unscrew pump.
Fig. 14 | 7673B |
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2.Fig. 13. Push pin (19) into hole. And push retaining spring into groove all the way around connecting rod.
3.Fig. 16. 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. 16 | 7673B |
4.Fig. 17. Fill packing nut with Graco TSL, through one of the slits, until fluid flows onto the top of seal.
Fig. 17 | 7677B |
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