2
Note:
The seal cartridge come on an installation bullet with a small diameter for storage and a loarger diameter for installation. The seal
lips curve towards the larger diameter when properly installed on the bullet. The seal should remain on the bullet until installation for
best results.
DISASSEMBLY
1. Remove motor from pump by removing four cap screws.
2. Remove seal retaining ring from drive plate if installed and discard.
3. Remove two 1/4” cap screws (200 series) or four 3/8” cap screws (300 series).
4. Scribe a line on motor casing (end plate, drive plate, housing), note orientation, and
pull apart.
5. Remove idler gear/shaft assembly, drive gear, and drive shaft dowel pin. Note:
Failure to remove dowel pin will result in bushing damage.
6. Press or tap (non-marring hammer) drive shaft/bearing assembly, and seal cartridge
out of drive plate.
7. Remove and discard old “O” rings and seal cartridge. Check shaft for wear or
grooving under seal and replace if damaged.
ASSEMBLY
1. Place drive shaf/bearing assembly in drive plate.
2. Apply a thin film of hydraulic oil to the seal lips and bullet. Insert
seal/bullet assembly over shaft tang. Press seal by hand over the
installation bullet until the seal casing touches the drive plate.
3. Place a 3/4” (200 Series) or 15/16” (300 Series) deep socket over
seal and press or tap into seal cavity until seated.
4. Remove the installation bullet and discard.
5. Lightly grease large “O” rings and insert in plate grooves. (300
series grooves in gear housing)
6. Place dowel pin and drive gear on drive shaft.
7. Place idler gear/shaft assembly in drive plate bushing.
8. Assemble the drive, center, and end plates aligning scribe marks.
9. Install two 1/4” cap screws - torque 6-8 ft-lbs (200 series) or four cap screws - torque 24 ft-lb (300 series).
Caution:
Do not over tighten.
10. Remove needle valve, replace thread seal (metal washer with rubber insert), and reassemble.
11. Remove seal check cap from drive plate with 5/32” allen wrench (200 series) or 7/8” wrench (300 series), replace seal check cap “O”
ring, and reassemble.
12. Position coupler in pump shaft slot and seal support spacer around coupler.
Note:
The smaller diameter of the 200 series spacer must face the hydraulic motor. Fill the remaining area of the coupler/spacer
cavity with coupler grease, align motor tang with coupler slot, and attach motor with four cap screws - torque 13 ft-lbs.
Disassembly Step 6
Assembly Step 3
Ace Pump Breakdown and Hydraulic Seal Replacement
2
Seal Cartridge
Drive Plate
End Plate
Gear Housing
Drive Shaft
Roll Pin
Housing Seal
"O"ring
Seal Check Cap
"O"ring
Thread Seal
1/4" Cap Screw
Seal Support
Spacer
J&M Part Number: JM0061308
Ace Pump Part Number: RK-FMCSC-150