Graco PR70e, Instructions Manual

Page: 45 / 70

Repair
334135B 45
8. Disconnect the pump shaft from the drive block.
a. Loosen the shaft locking nut.
b. Hold the drive block alignment rod stationary
with a wrench.
c. Turn the pump shaft with a wrench.
d. Manually push the pump shaft forward to sepa-
rate the shaft from the drive block.
9. Remove the shaft lock nut.
10. Remove the two screws that hold the pump collar in
place.
11. Remove the pump collar from the pump housing.
12. Slide the pump bearing housing away from the
pump housing to remove.
13. Remove rear pump components from the pump
bearing housing.
Clean and Inspect the Parts
14. Using a clean dry cloth, remove any existing grease
from the bearing housing.
15. Apply new high temperature grease lubricant
(part 115982) to the inside of the pump bearing
housing, and the new rebuild components.
Assemble the Rear Pump Assembly
16. Install the new rebuild kit components into the bear-
ing housing.
17. Apply one layer of thin masking tape over the male
threads of the pump shaft that mates with the drive
block. This will prevent the threads from damaging
the seal.
18. Slide the pump shaft through the hole in the bearing
housing.
19. Align the bearing housing in position next to the
pump housing.
20. Install the pump collar over the bearing housing.
21. Attach the pump housing using the two screws and
torque to 350 in-lb (39.5 N•m).
22. Remove the masking tape from pump shaft.
23. Install the pump shaft lock nut onto the pump shaft.
24. Connect the pump shaft to the drive block alignment
rod. Screw the shaft completely into the drive block.
25. Tighten the lock nut.
Prepare for Operation
26. Fill tanks.
27. Perform several shots to fill the pump with new
material.
28. Calibrate and phase the machine. Perform Setup ,
page 26.
NOTICE
Be careful when installing the seal. Ensure there is
masking tape on the threads of the piston rod and that
the open side of the seal faces the piston rod when it
slides onto the rod.