AC blower motor bearing seizing!!!
Arggggg!!!:M This happened once last year, and it just happened again. I have a 15,000 btu Coleman Mach air conditioner in my KZ Spree. When the AC kicks on, the blower motor connected to the squi...
Forum Discussion
Ah, the Bearing Issue.
I've fixed lots of motors. Fans, starters, power tools... So, when the blower motor in our Coleman Mach started to seize (should say Failed to Start Because it was Seized...) I got up there with the Zoom Spout Turbine Oil and dripped some on the shaft. That has never not worked. OOPS, not this time. WD-40 actually got it going. So I thought OK, I'll now add some Turbine Oil now that it's free. OK. For a few hours. Back to the same thing. I inquired here and found where an OP had replaced the sleeve bearings (simple bushings) in his with Ball Bearings. Decided not to do that since BBs can be noisy and our A/C was noisy enough. Last four days of the camping trip, I was up on the roof morning and night. Got home took it all apart, cleaned everything, bench tested it in the house. Reassembled on the RV. Same thing after a day. One of the guys here said the bearings get contaminated and really can't be cleaned. They're porous and the gook keeps seeping out. I surrendered and ordered a new motor. Had it sent to the next campground and changed it there. OK since. So, you may get lucky. Your bearings may not be as fouled. You may find a bearing house that has those sleeves, and you'll also need the felt that the oil soaks into to keep the bearings wet. You'll have to drill rivets out and fasten with cap screws and nuts. It can be done. I gave up. Sometimes the Dragon Wins.
I've fixed lots of motors. Fans, starters, power tools... So, when the blower motor in our Coleman Mach started to seize (should say Failed to Start Because it was Seized...) I got up there with the Zoom Spout Turbine Oil and dripped some on the shaft. That has never not worked. OOPS, not this time. WD-40 actually got it going. So I thought OK, I'll now add some Turbine Oil now that it's free. OK. For a few hours. Back to the same thing. I inquired here and found where an OP had replaced the sleeve bearings (simple bushings) in his with Ball Bearings. Decided not to do that since BBs can be noisy and our A/C was noisy enough. Last four days of the camping trip, I was up on the roof morning and night. Got home took it all apart, cleaned everything, bench tested it in the house. Reassembled on the RV. Same thing after a day. One of the guys here said the bearings get contaminated and really can't be cleaned. They're porous and the gook keeps seeping out. I surrendered and ordered a new motor. Had it sent to the next campground and changed it there. OK since. So, you may get lucky. Your bearings may not be as fouled. You may find a bearing house that has those sleeves, and you'll also need the felt that the oil soaks into to keep the bearings wet. You'll have to drill rivets out and fasten with cap screws and nuts. It can be done. I gave up. Sometimes the Dragon Wins.
