I have a DuAl loader, on my MM332, that got pretty jerky on the controls, so I took the two lift rams off, and had a hydraulic shop rebuild them. I also took my pump off, and took it along, for rebuild. After putting everything back togeather again, it is still jerky , if I am not very careful on the control valves. I used the opportunity, to change all the hydraulic fluid, and have raised and lowered the loader, to its extreme limits, to evacuate any air in the system. Do I have to replace, or rebuild the control valves? I won't let anyone work around the bucket, as I am afraid I will hurt them. If I use both hands on the control valves, then I can feather them, and raise, or lower them slowly. I need dome advise, from someone more knowledgable than me!
- Thread starter RalphWD45
- Start date
I am not at all familiar with MM tractors, but I do have a DuAl loader. It sounds to me that it is a tractor issue. Is the pump one that is integrated into the tractor or an exterior driven pump? It suggests to me that the pump is not getting an adequate oil supply--low oil, clogged filter, etc.?
Moonlite37
Well-known Member
Air in lines
Eagle Beagle
Member
Or a suction leak before the oil gets to the pump. is the oil foamy or can you tell? The needle on a pressure gauge placed after the pump, will fluctuate all over with a suction leak. Clogged filter, gauge more steady.
Beagle
Beagle
Adirondack case guy
Well-known Member
You have a problem with the suction side of your oil reservoir. Either too small of reserve or restricted flow to pump. Also check breather on your oil reservoir.
Loren
Loren
Thanks guys! I would NEVER have guessed that the problem, was in the supply side of things. I have been gone all day, and just got back, an hour ago, so just now saw your posts. Come daylight, I will check out that possibility. My pump is outside the tractor body, and powered by a lovejoy coupling, from the left side, belt pulley shaft. It was recently sent to the hydraulic shop, for a rebuild.
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