Re: 1956 Packard Patrician from Bring A Trailer

Posted by HH56 On 2022/8/2 17:24:36

The armature is supported by a bearing at each end with a long length in the middle. When the window hits the top or bottom limit things abruptly stop letting the shaft absorb the shock. The roughly 1/4" diameter shaft has the worm groove cut in and metal drops down to about 1/8" or less. The regulator and worm drive gear is on one side of the weak spot and suddenly stops, the heavy windings of the armature is on the other side and is still energized so keeps wanting to turn and the shaft snaps at the weak spot. Almost all failures of a window motor have been because the armature shaft breaks and I doubt that is going to be something that could be easily rebuilt.

In this case with the report of a motor overheating and the mechanic saying there is something missing or wrong with the regulator, there is probably some serious drag and an overloaded motor. If the mechanical issues are corrected the motor might be OK.