I have a M113A3 that is on its 3rd hydraulic pump in 3 months. The first time it went out, the mech did the pressure tests and found the pump to be bad. When he pulled the pump to replace it, the drive gear came loose. We pulled the pack and sent it to CSMS to have the drive gear repaired. When we reinstalled the pump it lasted all of an hour and was smoke. We checked everything we could hoping we just got a bad pump. I had the mech pull all the lines and flush the system including the ram and replace with clean fluid. The track just showed up and by my initial look over, the pump is out again.
This is the 5th pump we have had in 2 years and if you ever changed one, they are a nightmare.
Any help would be appreciated.