Quad Force Blade Drive Assembl 20659

The new part includes instruction on how to install it. Thank you.

Took apart, cleaned with silicone oil, brake cleaner and air. Replaced the blade drive, need the right size screwdrivers. Normal brush replacement. The circuit card had cracks in the etches on both of the line connectors. After soldering the connectors and repairing the cracks, clippers worked well. The circuit card is weak at the connectors due the the card being so thin. Probably should replace the circuit card at some point in the future if it fails. Plastic housing screw holders were weak so I had to enforce them to get the screws tight, plastic is very thin and brittle. I suspect next time I do repair Ill need both plastic housing pieces, circuit card and whatever else wears out. The brush holder plastic screws were partly broken so I had to us small chisel/knife to break it out w/o destroying the housing, although the old brushes were still in good shape. Plastic components become brittle with use, heat and time, its plastic. Internals like the motor, switch, armature are superior as compared to the housings. Blades are very durable, light plastic hard to work with, lightweight, but not very durable.
All in all not a bad repair job, if I was to pay somebody labor..... better to buy new pair.

Replaced the drive. Easy to do. Screwdriver needed to remove the top of the clipper body to get to the drive part.

Opened clipper case and replaced motor control board. Reassembled clipper body. Then removed blade holder screws and blade holder. Cleaned out excess dog hair. Took of Blade Drive cover as it just snaps on and off. Removed two screws holding blade drive. Installed new blade drive and screws and then snapped cover back on.

Remove phillips screws from clipper housing. Separate housing.
Locate wires to circuit board. Remove with needle nose pliers.
Remove and replace circuit board and wires.
Replace clipper housing with phillips screws

1 removed switch and replaced switch
2 added foam pad

Both upper and lower housings were damaged in use over time. The case was broken enough to warrant replacement after being dropped on a hard tile floor. Examination revealed that the Quad blade drive was worn from use.

1. Removed upper housing (4 screws)
2. Removed motor assembly from lower housing (2 screws)
3. Removed quad drive (2 screws)
4. Installed New Quad drive assy. (2 screws)
5. Installed motor assy. into new lower Housing (2 screws)
6. Installed new upper Housing (4 screws)
Note: Pay attention to line cord grommet orientation when removing motor assy. Also, note the power switch actuator orientation and the insulator on top of the switch. If your unit has a lot of time on it then check the brush condition before ordering parts.

Remove plastic body.
Take picture to insure correct placement of wires for cord.
Disconnect cord.
Remove old circuit board.
Install new circuit board.
Reconnect cord.
Remove and replace blade drive.
Place Insulation sheet in front of switch.
Place rubber protector on switch.
Plug in and test.
Put body together again.
Finished.

Took apart. Removed the old drive. Replaced with the new drive. Reassembled and tested.

Simply followed replacement instructions which came with the part. Removed a total of four screws, removed old blade drive and inserted new drive. Replaced screws. Blades and clipper are as quiet as when new.