KitchenAid KSM75 Service Manual page 34

Stand Mixer Service Manual LIT4177310-C
PROBLEM SOLVING QUICK REFERENCE GUIDE
MIXER PROBLEM
Switch lever clicks, but mixer will not
run or buzz.
Mixer will not shut off with switch.
Bowl not held firmly on pedestal
Beater strikes bowl or too much
clearance.
Planetary turns - beater does not revolve.
Mixer runs with a raspy, bumpy noise
at the planetary.
Mixer runs with bad vibration rumbling
noise and goes to higher speeds.
Mixer runs on low speed, but has
no power.
Mixer has no power on low speed but
OK on high speed.
Repeated worm gear failures.
KITCHENAID
MOST LIKELY CAUSE(S)
Open electrical circuit.
ON/OFF switch not correctly
adjusted with switch control link
Loose clamp disc screws.
Bent bowl screw cap.
Adjusting screw on tongue of
bottom cover improperly set.
Pinion gear drive pin broken.
Bottom cover internal gear teeth
worn or broken.
Faulty governor.
Bad phase control.
Bad electrical connections.
"Stir" speed improperly set
Faulty governor.
Galled attachment gear.
Attach hub bearing galled.
Appendix B-1
2005 KitchenAid
WHAT TO DO / CHECK
Faulty plug.
Faulty power cord.
Faulty speed control plate.
Wire loose from brush holder.
Bad connection between field and cord.
Open circuited armature.
Open circuited field.
Faulty switch ON/OFF.
Bad phase control.
Dirty contacts.
Incorrect brush orientation.
Check switch control link lever.
Tighten the screws.
Replace bowl screw cap.
If none available, bend the four lugs or lips
back into position.
Turn the adjusting screw slightly to right or left to
adjust clearance. Clearance should be 1/16"
Remove planetary and take off the pinion gear.
Replace the drive pin.
Remove the planetary & bottom cover.
NOTE: The complete bottom cover assembly must
be replaced.
Replace the governor.
Control plate contacts not going closed.
Adjust the control plate.
Replace the phase control.
Check the connections to the control plate.
Repair any loose connections.
Replace the control plate assembly.
Remove end cover and reset "stir" speed.
The planetary should revolve at 60 RPM on "stir"
Turn switch lever to # 10 position and hold out the
control plate as far as possible. Turn the switch lever
to "OFF". Watch the governor as it recedes when the
armature slows down. If faulty, replace it.
Replace attachment hub gear.
Replace gear case - motor housing.