Happijac Parts list/Repair Instruction

WestCoast1969 wrote:
I am having some difficulty with the two rear motor heads on my jacks. One seized up and the other is really noisy, so I emailed Happijac about repair costs and this is what I got.

If the motor head has not been used in a while it is possible that the brushes on the motor have begun to seize. SOMETIMES you can break them free by inserting the manual hand crank in the socket (leaving the lever in the up position) and attempt to turn the handle ¼ turn. If this does not work and you are mechanical you could attempt to take the top cover off the motor head (6 screws with square head insert) and pull the gears exposing the top of the motor spindle. Wrap the spindle with a rag and apply vise grips and attempt to turn the motor.


If this fails we have a program to refurbish the motor head for $59.95. ( But does not include shipping (( this could be a high cost because of the weight and distance from and to 84037)) ).

We also have refurbished motor heads for $95.00 or new motor heads for $179.95

AN RGA MUST BE CREATED BEFORE SENDING IN THE PRODUCT. ( You can call 800 231 7440 to acquire an RGA)

In addition to the above quote I also received (6) pdf documents that contain parts list and repair instruction. See below.


45 series parts break down
4150/4160 Diagram Parts List
Cam Install
Clutch Adjustment
Outer Jack Tube Removal
Upper Assembly