I've been to this movie myself.
My fuses kept blowing
The motor turned extremely slow.
I thought the motor was going bad.
Then read posting here on Rv.Net and found that someone said the screws needed to be lubricated.
After pulling apart the motor I found:
The drive gears had old, dry & crusty grease (or what was left of it)
both Jacks had hold dry crusty grease.
After disassembling everything, and cleaning it all with brake cleaner and a wire brush down to bare metal, I reassembled the entire thing and haven't looked back.
my BIL had a similar problem and he replaced his motor (which was warn from teh dried out grease) and it worked better for a couple of years but eventually he had the same problem.
You may just have a defective motor - but what caused the defective motor may be the lack of good useful grease on the jacks.
Josh
