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Tractor Talk Discussion Board

Re: Case 648 update 3. The work continues!


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Posted by Tslinger on April 11, 2022 at 07:05:58 from (69.74.110.34):

In Reply to: Case 648 update 3. The work continues! posted by 1939farmall on April 11, 2022 at 04:47:30:

Lookin good so far! Nice to see someone either kept it inside all the time, or actually serviced the rear this century...

There's a procedure in one of the manuals, either the owner's, or the hydraulic service manual that discusses how to drain the whole system. It's a royal pain. You have to break off all the cylinders to ensure you get all the oil out.

The other option is to dump what you can, either by the return line, or the test port on the control valve, and then refill, circulate, etc...

These machine are never real strong in high range, but it should be fine on the flat. Both mine ended up needing the pump replaced. It was a crappy job, but it was well worth it. I would expect the pump to be bad before the drive motor. The hoe, and loader need so little flow in comparison to the drive that it will seem like the system is fine, and the motor is shot, but it's almost always the pump.


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