Down-draft radiator fan failure

[mrkane]

Gurus:

My Kohler/Yanmar generator shut down due to coolant over-temp. I found the squirrel-cage blower had stopped. The motor would rotate only a partial turn when spun by hand (with the engine off.) Later, after cooling, the motor now spins more freely. After cooling overnight, the fan spins very freely, with no problems with the bearings noted. The generator ran for several hours before the fan stopped again. The motor case was quite warm.

Is this a symptom that this motor should be replaced? Capacitor?

The motor is marked GE 5KCP39LG, 1075 rpm, 1/3 HP, 230 VAC. Web searching has not located an exact GE replacement, but rather many other 5KCP39xxx versions. I would prefer to have a replacement on hand before starting the swap, if possible. (It appears it will be necessary to drain the coolant to get the fan housing out.)

Any suggestions?



--M.R.Kane
1987 PT40 'Sleipnir'
currently in Iron River, MI