Kenmore series 90 won't agitate; buzzing sound; fills, spins, and drains fine

[kevink]

hiya - my kenmore fills but won't agitate. there is a loud buzzing sound. the spin and drain cycles work fine.

Model 110.20902991

[JWWebster]

check the coupling

[kevink]

thx.

i tore the thing apart and the coupling looks healthy..nothing worn.

anything else?

[kevink]

does the motor control the agitate and the spin?  where do you think the buzzing sound is coming from?  the spin works like a champ - it's just agitate that is really agitating.

[JWWebster]

now that you have the case off you might can ID the noise easier. Jump the lid switch and do a load with the case off.

[kevink]

the sound seems to come from the motor (between the two copper coil areas).  if this is bad would it still spin and drain?

[JWWebster]

take the pump off and run it with the pump off look at the area around the bearings.

[kevink]

took the pump off - set it to agitation.  loud noise, not spinning.

[kevink]

by not spinning - i mean the bolt that hooks into the pump is not spinning, nor are the visible motor parts.

[JWWebster]

take the motor off and run it by itself

[kevink]

the motor works during the spin cycle.

[JWWebster]

must be a bad motor.

[kevink]

ouch!  nothing else could be the culprit?  clutch?  dogs?

[Repair-man]

In some cases, the timer can cause this if it is not sending  enough voltage to the agitate windings. The only way to confirm this is to check voltage at the timer between the WHite/Bk wire and the BU wires when the machine should be agitating. If 120 volts is not present, the timer is the issue.

[JWWebster]

Take the coupling off the transmission and the motor and look at it for cracks.