Repair
Repair
Repair
Repair
Disassembly
Disassembly
Disassembly
1.
Stop the pump at the bottom of its stroke.
2.
Relieve the pressure.
Follow
the
Pressure Relief Procedure, page 13
.
3.
Disconnect the hoses from the lower and plug
the ends to prevent fluid contamination.
4.
Models
Models
Models with
with
with Sealed
Sealed
Sealed Lowers
Lowers
Lowers: 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. Do
Do
Do not
not
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.
Reassembly
Reassembly
Reassembly
1.
If the coupling adapter (9) and tie rods (6) have
not been disassembled from the motor (3), skip
to step 2.
If the coupling adapter (9) and tie rods (6) have
been disassembled from the motor (3), follow
these steps:
a.
Screw the tie rods (6) into the motor (3) and
torque to 50-60 ft-lb (68-81 N•m). See Fig. 7.
b.
Apply blue thread locker to the coupling
adapter (9).
c.
Screw the coupling adapter (9) into the motor
shaft and torque to 90–100 ft-lb (122–135
N•m).
d.
Continue to step 2.
2.
Assemble the coupling nut (11) over the piston
rod (R). See Fig. 8.
3.
Orient the lower (7) to the motor (3). Position the
lower on the tie rods (6).
4.
If you are reusing lock nuts (8) and the nylon of
the lock nut is worn or cut, add blue thread locker
to the tie rod threads.
5.
Screw the lock nuts (8) onto the tie rods (6).
Leave the lock nuts (8) loose enough to allow the
lower to move so that it can be aligned correctly.
6.
Insert the collars (10) into the coupling nut (11).
Tighten the coupling nut (11) onto the coupling
adapter (9) and torque to 90–100 ft-lb (122–135
N•m) to align the motor shaft with the piston rod.
7.
Tighten the lock nuts (8) and torque to 50-60 ft-lb
(68-81 N•m).
16
3A3384B
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