2
Caution:
Do not remove the protective paper tube from the new flange assembly.
DISASSEMBLY
1. Wipe the motor with a clean cloth to remove dirt which
could contaminate the motor.
2. Note port locations then remove hoses and external
fittings.
3. Mark the motor section joints to indicate orientation of the
motor components.
4. Remove (4) motor assembly cap screws. Motors with hex
head cap screws require a 17 mm socket. Motors with
socket head cap screws require a 9.5 mm or 3/8” hex key
wrench.
5. Set motor on rear cover with shaft pointing up.
6. Remove front motor flange by pressing thumbs against
shaft end while pulling up with fingers behind flange ears.
Take care to not disturb the other motor components.
7. Remove the housing seal O-ring and discard the old flange assembly. Inspect the motor shaft for grooving or scoring. Moderate to
severe damage in the sealing area may prevent proper sealing and require motor replacement.
ASSEMBLY
8. Place seal installation tool over splined shaft end. Lubricate the tool and seal lips with clean oil.
9. Lightly grease housing seal O-ring and place into groove on rear of new flange.
10. Carefully place new flange/seal assembly over installation tool and press down slowly to body. The tool will push the paper tube out.
Note:
Take care to hold the flange level and push evenly on both sides of the flange.
11. Discard seal installation tool and paper tube.
12. Reinstall motor assembly bolts and tighten to 33 ft-lb (45 N-m) torque. Turn the shaft by hand to ensure the motor turns freely.
13. Reinstall external motor fittings.
Step 4
Step 6
Ace Pump Breakdown and Hydraulic Seal Replacement
Step 10
Step 11
Step 8
To see a video on how to change this check out this video from Ace Pumps.
https://www.youtube.com/watch?v=Lxe5vomHmrU
J&M Part Number: JM0061314
Ace Pump Part Number: RK-BAC-75-M
