Air compressor motor case repair

[iowa4x4dieselman]

I have a Quincy QT-5 I am getting ready for use and the motor cage spot welds are broke and was wondering if I disassemble the motor and re weld the case if this will be a suitable repair. I really hate to buy a new motor because this one works great it just doesn’t keep the proper tension on the compressor because of the failed spot-welds. Picture of what I’m dealing with. TIA

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[redmondjp]

Wow! I've never seen a failure like that. If you do attempt a repair, I would only use a MIG welder as the heat-affected zone will be minimal.

But my biggest concern about welding on the motor housing is how much heat will be transferred into the windings - the insulation on them can be damaged by heat.

If you do attempt to MIG-weld it, I would first just do 2-3 tack-welds to affix the base in the proper position. Then do short sections of weld, maybe 1/2" in length at a time, with several hours in between, in order to let the heat dissipate.

edit: from looking at your picture, can you even get into that area in order to weld the broken area? If not, you may consider cutting access holes or slots in the base such that you can weld through them.

 

[JohnDeere1]

I'd weld it that's your only hope on my air compressor the motor swivels up and down and you turn a wing nut to hold it in place putting tension on the belt it would be very hard for me to find a motor as only 1 will work as it has an odd bracket welded on it.

 

[Davefr]

Take it to a motor shop and have them remove the stator prior to any welding.

But before you do that have you contacted Quincy or the motor manufacturer. It's probably worth a phone call.

It kind of looks like it could be stress/damage from shipping.

 

[454ragtop]

Might try a mechanical repair with a giant hose clamp or 2. I converted a C face motor to a foot type, made a bracket to catch a couple of the face holes and used a giant hose clamp around the case, worked fine.