Achilles99,
Without going into a really really long story, basically I have had two complete bearing failures on the lift's pulleys. Some of the bearings they used in their pulley's were/are ball bearings and other pulleys utilize brass sleeves.
Both failures were while the lift was in motion.
The failures were with the pulley's with ball bearings, the bearings outer race essentially cracked and the bearing failed, in this state the balls in the bearing are free to fall out. When this happens the pulley then twists on it's shaft and the cable comes off the pulley and then the lift with your car on it attempts to fall. Needless to say this is a very scary moment !!!
The first time it happened; when the bearing failed it made a sound like a gunshot and the lift platform with my car on it fell approx 5"-6" to where the safety latch catches. Thanks goodness that their safety mechanism works, however be aware that this leaves your lift platform with your car on it in a twisted state. One corner is lower than the others. This creates a real challenge when you are ready to fix the bearing and return the platform/car to a level postion.
I sent them the failed bearing and they sent me a postcard note that the bearings must be properly lubed (but the bearing had plenty of lube on the balls and other pieces that I sent them?) and they mentioned that I could purchase replacement bearings for $15.00 (I think that was the price...don't remember exactly). Since my lift is only used about four times per year and was only about 18 months old...I didn't feel that was the actual problem so I just chalked up the failure to a defective bearing and purchased two new ones (although I was pissed...who has time for this crap!). And now I really wanted a spare. I repaired the failed bearing, made sure all of them were greased and got the lift back into operation...I gotta tell ya it wasn't a pretty sight sitting there on an angle for a week or so while I waited on the new bearings.
Good thing I bought the spare because three months later another bearing failed on the opposite site. Fortunately I knew what to expect and also my car was closer to ground this time. I really wasn't buying the lube issue at this point and had absolutely no faith in Autolifter's. So I took the spare bearing to an industrial bearing supply company, to see if I could purchase something
more heavy duty. After some measurements, I was advised that this is somewhat of a special bearing, it is a metric bearing from China that is commonly used on Lawn Mower/Tractor applications for the shaft that powers the blades. It is designed for higher RPM applications and is not designed for the forces that exist on my lift. There was no exact industrial replacement for this "cheap" bearing and my pulley's would have to machined in order to fit a proper bearing.
After this experience I checked the other pulley's on my unit with ball bearings and they were cracked but had not completely failed yet.
In addition to this issue, I have had leakage problems with the rod seals on the lifting cylinder. Thus I can not recommend a AutoLifter's unit.
Sorry for the length of the message but I could go on and on about how scary it is to have a piece of equipment like this that you do feel comfortable working around.