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MM M602 Hydraulics

J

Jay Liedman

Member
This is perhaps a really ignorant question, but here goes: I have a Moline M602. I rebuilt the engine, and made a few other repairs, and it runs really nice. HOWEVER, the rear hydraulic arms do not move at all when I manipulate the levers. I have added fluid, but no change. I am assuming the pump must be bad, but I am quite unfamiliar with the hydraulic system on this model, and there are some extra control levers I really do not understand the purpose of. Any advice before I pull the pump off?
 
Jay Liedman said:
This is perhaps a really ignorant question, but here goes: I have a Moline M602. I rebuilt the engine, and made a few other repairs, and it runs really nice. HOWEVER, the rear hydraulic arms do not move at all when I manipulate the levers. I have added fluid, but no change. I am assuming the pump must be bad, but I am quite unfamiliar with the hydraulic system on this model, and there are some extra control levers I really do not understand the purpose of. Any advice before I pull the pump off?
Click to expand...
I'd find an operators manual and find out how things are supposed to work and what the controls are and how to use them. Then find a service manual or someone who knows how to diagnose it.
 
Jay Liedman said:
This is perhaps a really ignorant question, but here goes: I have a Moline M602. I rebuilt the engine, and made a few other repairs, and it runs really nice. HOWEVER, the rear hydraulic arms do not move at all when I manipulate the levers. I have added fluid, but no change. I am assuming the pump must be bad, but I am quite unfamiliar with the hydraulic system on this model, and there are some extra control levers I really do not understand the purpose of. Any advice before I pull the pump off?
Click to expand...
Post on the Minneapolis-Moline forum. Lots of knowledgeable folks there.
 
Yes on the Moline forum. You may have a stuck valve in hydraulic, it happened to me on a jet star. 602 is a nice machine and I am no expert on them. Moline had basically two types of hydraulic systems. A manual will really help.
 
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