HYDRAULIC MOTOR REPAIR KITS
MOTOR REPAIR KIT INSTALLATION
Ace hydraulic motor repair kits include all O-rings and seals necessary to rebuild the motor. The motor
model number and date code are stamped on the end plate below the ports. The 200 series kit will fit
all motors including those with “L”, “N”, or “R” designation. The 300 series kit will fit all motors including
those with “L” or “A” designations except 310 motors with G-5 or earlier date codes.
NOTE: The seal cartridge comes on an installation bullet with a small diameter for storage and
a larger 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. Draw or 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.
Disassembly Step 6
8
Motor Model
Repair Kit Part Number
Ace EDP#
200 Series Motors (202, 203, 204, 206, 210)
RK-BAC-75-HYD-L
41374
300 Series Motors (304, 305, 306, 307, 310)
RK-BAC-75-HYD-300-L
41362
310 Motor (G-5 or earlier)
RK-BAC-75-HYD-310
41379