Ive heard of people rebuilding them with success. Just wondering if anyone here has done it, what was involved, maybe some pictures? A friend of mine has my old JD 70 that one side barely moves once it gets warm, and My old NH L455 has one that is starting to groan, but still has decent power. Both machines need axle seals, thinking about giving them a shot while we're in there. Thanks, -Mike
The motors are not much of a problem, it's the final reductions that give everyone a pain.
The 455 is likely a motor with the groan. The 70 with a lack of power could be a pump. As a general rule I always rebuild the pumps but I seldom rebuild the drive motors due to the cost of the parts. Reman drive motors cost me the same as the parts to service a worn motor. Most reduction drives are easy to rebuild but you have to get the tolerances and bearing preloads right and it takes some knowledge and special tools.
Buy the time you figure parts labor and cleaning supplies usually its cheaper to buy reman than rebuild. Thats what i found working for bobcat on just about everything drive motors pumps hydrostats. ultimately it came down to the customer and what they wanted. If you have the time and patience for it go for it for a learning experience. Make sure you take notes or set everthing in a way that you know which way the bearings gears and seals go together. Lip seals especially in motors so they seal correctly and you dont have internal leakage after you get done
I'm new to this site. And new to heavy equipment. I have an asv Sr-70. I was wondering how to tell if the drive motor starts to wear/go? Thanks n