Replace Gear Assembly; Replace Motor; Reinstall G-Jr Pump - Graco G-JR Instructions-Parts List Manual

Chemical injection pump
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Repair
12. Install the new motor with the two T-20 6lobe
screws. Torque to 26-32 in-lbs (3-4 N•m).
NOTICE
Do not over-torque the T-20 6lobe screws. Doing so
may damage the plastic brush housing in the motor
and result in problems with the motor shroud tabs
locking properly.
13. Attach the new motor shroud to the motor with the
top and bottom tabs.
14. Reinstall the gear cover (3).
15. Reinstall the gear assembly per step 3 of Replace
Gear Assembly, page 16.

Replace Gear Assembly

1. Follow steps 1-7 in Replace Fluid Module, page
15.
2. Apply supplied grease to both bearing and gear of
the new gear assembly.
3. Insert the bearing tab of the new gear assembly
assembly into the pocket of the plunger, and rock
the gear back and forth or spin the gear while
pushing the fluid module and gear assembly
together.
4. Follow steps 11-14 in Replace Fluid Module, page
15.
16

Replace Motor

1. Follow steps 1-4 in Replace Fluid Module, page
15.
2. Install the new motor with the two T-20 6lobe
screws. Torque to 26-32 in-lbs (3-4 N•m).
NOTICE
Do not over-torque the T-20 6lobe screws. Doing so
may damage the plastic brush housing in the motor
and result in problems with the motor shroud tabs
locking properly.
3. Attach the new motor shroud to the motor with the
top and bottom tabs.
4. Reinstall the gear cover (3).
5. Reinstall the gear assembly per step 3 of Replace
Gear Assembly, page 16.

Reinstall G-JR Pump

1. Reconnect the wires that were disconnected in step
5 in Remove G-JR Pump, page 14.
NOTE: Connect the white wire from the controller to the
blue wire from the motor, and the black wire with the
white stripe from the controller to the black wire from the
motor.
2. Secure the mounting plate to the front of the
enclosure (1) with the four screws (5) and lock nuts
(20), with the Harrier controller bracket (25) secured
by the top two screws.
3. Slide the enclosure lid (7) back into position and
tighten the screws to secure.
3A8109A

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25t65125t650

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