Graco High-Flo JS17A8, Instructions Manual

Page: 13 / 28

Repair
3A6938D 13
Repair
Disassembly
1. Relieve the pressure. Follow the Pressure Relief
Procedure , page 9.
2. Disconnect the hoses from the lower and plug the
ends to prevent fluid contamination.
3. Remove the 2-piece shield (22) by inserting a
screwdriver straight into the slot, and using it as a
lever to release the tab. Repeat for all tabs.
Do not
use the screwdriver to pry the shields apart. See
F
IG
. 3.
4. Loosen the coupling nut (3) and remove the collars
(4). Remove the coupling nut from the piston rod
(R). Unscrew the lock nuts (7) from the tie rods (6).
Separate the motor (1) and lower (2). See
Parts , on
page 16.
5. To repair the air motor or lower, see the separate
manuals listed under
Related Manuals , on page 2.
Reassembly
1. If the coupling adapter (5) and tie rods (6) have not
been disassembled from the motor, skip to step 2.
If the coupling adapter (5) and tie rods (6) have
been disassembled from the motor, follow these
steps:
a. Screw the tie rods (6) into the motor (1) and
torque to 50-60 ft-lb (68-81 N•m). See Parts ,
page 16.
b. Apply red Loctite
®
to the coupling adapter (5).
c. Screw the coupling adapter (5) into the motor
shaft and torque to 90-100 ft-lb. (122-136 N•m).
d. Continue to step 2.
2. Assemble the coupling nut (3) over the piston rod
(R).
3. Orient the lower (2) to the motor (1). Position the
lower on the tie rods (6).
4. If you are reusing lock nuts (7) and the nylon of the
lock nut is worn or cut, add blue Loctite to the tie rod
threads.
5. Screw the lock nuts (7) onto the tie rods. Leave the
lock nuts (7) loose enough to allow the lower to
move so that it can be aligned correctly.
6. Insert the collars (4) into the coupling nut (3).
Tighten the coupling nut onto the coupling adapter
(5) and torque to 90-100 ft-lb. (122-136 N•m) to
align the motor shaft with the piston rod (R).
7. Tighten the lock nuts (7) and torque to 50-60 ft-lb
(68-81 N•m).
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
splashing fluid and moving parts, follow the
Pressure
Relief Procedure before servicing the equipment.
F
IG
. 3. Shield Disassembly
ti15759a ti15770a
Step 1
Step 2