Displacement Pump
Removal
1. Flush pump.
2.
Relieve pressure; page 5.
3.Fig. 15. Cycle pump with piston rod (222) in its lowest position.
4.Fig. 15. Remove suction tube (30) and hose (33).
222
33
30
5.Fig. 16. Use screwdriver: push retaining spring up and push out pin (29).
29
Fig. 16 | 7675B |
6.Fig. 17. Loosen locknut by hitting firmly with a 20 oz (maximum) hammer. Unscrew pump.
Fig. 15
7672C
Fig. 17 | 7673B |
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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 locknut loosens during operation, the threads of the bearing housing will be damaged. Make sure locknut is properly tightened.
1.Fig. 18. Pull piston rod out 1.5 in. Screw in pump until holes in bearing cross link and piston rod align.
1.5 in.
Fig. 18 | 7676B |
2.Fig. 16. Push pin (29) into hole. And push retaining spring into groove all the way around connecting rod.
Fig. 19. 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 (maximum) ham- mer to approximately 75" 5
Fig. 19 | 7673B |
Fig. 20. Fill packing nut with Graco TSL until fluid flows onto the top of seal.
Fig. 20 | 7677B |
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