Displacement Pump - Graco 309412F Repair Instructions

Removal
See manual 309277 for pump repair instructions.
1. Flush pump.
2. Fig. 9. Cycle pump with piston rod (222) in lowest
position.
3.
Relieve pressure; page 4.
4. Fig. 9. Remove suction tube (30) and hose (33).
33
Fig. 9
Repair
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 (101) and retaining
clip (71a) are properly installed. See Detail A. Fig.
10.
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. 12. Pull piston rod out 1.0 in. Screw in pump
until holes in housing plates and piston rod align.
Fig. 12

Displacement Pump

222
9024C
30
9024B
1.0 in.
9020A
5. Fig. 10. Use screwdriver to push out pump
pin (101).
Detail A
Fig. 10
6. Fig. 11. Loosen locknut by hitting firmly with a
20 oz (maximum) hammer. Unscrew pump.
Fig. 11
2. Fig. 10. See Detail A. Push pin (101) into hole
until retaining clip (71a) snaps over pin.
Fig. 13. Screw jam nut down onto pump until nut
stops. Screw pump up into pump plate until it stops.
Back off pump one full turn and align pump outlet to
back. Tighten jam nut by hand, then tap 1/8 to 1/4 turn
with a 20 oz (maximum) hammer to approximately 75
±5 ft--lb (102 N¡m).
Fig. 13
Fig. 14. Fill packing nut with Graco TSL until fluid flows
onto the top of seal.
Fig. 14
71a
101
9019B
9022A
9021A
9023A
309412 15