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Ace Pump Breakdown and Water Seal Replacement
J&M Part Number: JM0061312
Ace Pump Part Number: RK-FMC-750
To see a video on how to change this check out this video from Ace Pumps.
https://www.youtube.com/watch?v=EbIVN45hvss
Volute
O-ring
DISASSEMBLY
1.
Mark orientation of volute, seal plate, frame, and motor to assist in reassembly.
2.
Remove (2) socket head motor screws and washers with 5/16" hex wrench.
3.
Remove hydraulic motor.
Note: Tap with a non-marring hammer if necessary.
Alternate method: a) rotate motor slightly positioning flange ears in front of bolt holes b) install (2) motor screws in motor mount
holes from opposite direction and tighten by hand until snug c) tighten screws with wrench using an alternating pattern of one turn
each until separated.
4.
Remove snap ring from behind rear pump bearing.
5.
Remove cap from air fill valve and press stem to release reservoir pressure.
6.
Remove hex drain plug with 7/8" wrench and drain barrier fluid into a clean pan.
Note: Recycle or dispose of used fluid the same as motor oil.
7.
Remove (4) volute hex head cap screws and spacers with a 9/16" wrench.
8.
Remove volute and O-ring.
9.
Remove impeller acorn nut with a 1" socket.
Note: Turn counterclockwise to remove. Insert a flat file into an impeller vane to hold stationary.
10. Remove impeller and key from shaft.
11. Remove (4) socket head seal plate cap screws with 5/16" hex wrench.
Note: Two screws were used on early models.
12. Remove seal plate slowly and place shop towel over shaft end for protection. Remove O-ring.
Danger: Compression of seal spring may cause part of seal to fly off without warning.
13. Slide rotating seal assembly ((2) seal faces and (1) spring) off shaft and discard.
14. Install impeller nut on shaft end to protect threads.
15. Press or tap (non-marring hammer) shaft/bearing assembly from impeller end until clear of stationary seal face in mounting frame.
16. Use a screw driver to pry stationary seal seats from frame and seal plate.
2
Stationary
Seal Plate
Seal Seats
Impeller
Drain Plug
Frame
Rotating Seal Assy.
Spacer (4)
Shaft/Bearing Assy.
Volute Cap Screw (4)
O-ring
Seal Plate Cap Screw (4)
Motor
Pad
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