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Repair
RepairRepair
Repair
DisassemblyDisassembly
Disassembly
1. Stop the pump at the bottom of its stroke.
2. Relieve the pressure. See the
Pressure Relief Procedure, page 13.
3. Disconnect the hoses from the lower and plug
the ends to prevent uid contamination.
4. Remove the 2-piece shield (12) by inserting a
screwdriver straight into the slot, and using it as
a lever to release the tab. Repeat for all tabs. DoDo
Do
notnot
not
use the screwdriver to pry the shields apart.
5. Loosen the coupling nut (11) and remove the
collars (10). Remove the coupling nut from the
piston rod (R). Unscrew the locknuts (8) from the
tie rods (6). Separate the motor (3) and lower
(7). See Fig. 7.
6. To repair the lower, see the lower manual.
7. There are no user-serviceable parts in the
motor. Contact your Graco representative for
assistance.
ReassemblyReassembly
Reassembly
NOTE:NOTE:
NOTE:
If the coupling adapter (9) and tie rods
(6) have been disassembled from the motor, see
Reassemble the Coupling Adapter and Tie Rods to
the Motor, page 17.
1. See Fig. 8. Assemble the coupling nut (11) to
the piston rod (R).
2. Orient the lower (7) to the motor (3). Position the
lower on the tie rods (6). Lubricate the threads of
the tie rods. Screw the tie rod locknuts (8) onto
the tie rods. Tighten the locknuts and torque to
50-60 ft-lb (68-81 N•m).
3. Insert the collars (10) into the coupling nut
(11). Tighten the coupling nut onto the coupling
adapter (9) and torque to 90–100 ft-lb (122–135
N•m).
4. Install the shields (12) by engaging the bottom
lips with the groove in the wet-cup cap. Snap the
two shields together.
5. Flush and test the pump before reinstalling
it in the system. Connect hoses and ush
the pump. While it is pressurized, check for
smooth operation and leaks. Adjust or repair
as necessary before reinstalling in the system.
Reconnect the pump ground wire before
operating.
163A2096D