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Case Tractors Discussion Forum

Case-o-matic rebuild

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Jeff in RI

03-31-2007 09:21:15

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Hi Guys, I just replaced the torque converter fluid and filter in my 1960 540C and the pressure is still low. The needle on the gauge reads halfway between 0 and the green zone. I think it even went down a little after the change. The tractor won't move in high range in high gear, but it will move OK in low range in low gear. I even pushed into a pile of dirt hard enough to get a bucket of dirt. My question is this... if I limit my use to just moving the machine around so that I can use the Hoe, and do not try to push or grade with the front bucket, how long will the tranny hold out before it won't move anymore? Question # 2 , A local mechanic said that a rebuild would cost between $5K - $7K. This doesn't make sense for a $4K machine. Is this something a shade tree mechanic could do himself with the right manual? I was thinking maybe break the machine in half and remove the torque converter, dual drive, and pump and take them to the mechanic for him to rebuild. ?? I have rebuilt a couple of truck engines but I am certianly not an equipment mechanic. Your opinion would be apreciated.
, jeff

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04-02-2007 18:19:58

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 Re: Case-o-matic rebuild in reply to Jeff in RI, 03-31-2007 09:21:15  
I have a 530 CK hoe with the same issue. I have removed the pedal and torque converter relief valves and cleaned them (even shimmed the spring with no luck). Mine has better pressure in cold weather (I suppose the fluid is thicker then). The previous owner had even taken out the thermostat to try to keep the pressure up. I have a repair manual and will be tearing mine down maybe this summer. There is a set of steel rings on a piston that enguages a clutch pack and I assume these are the culprit.

I have been using mine carefully as is and downshifting when I feel it slipping. I switched up to 50% 90 weight john deere hydraulic fluid and that has helped my pressure somewhat. I also bypassed the radiator caseomatic fluid cooler so that the hot engine doesn't warm the fluid up (I never drive it over 200 yards at a time). I can scoop a loader buscket full of dirt, if the fluid is cold in 1st low range but can't drive in high gear either.

The steel sealing rings are about $90 but the clutch pack parts are several hundred $

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03-31-2007 12:22:12

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 Re: Case-o-matic rebuild in reply to Jeff in RI, 03-31-2007 09:21:15  
relief valve in pump is the most likly be the problem The cover under fuel tank is where pump located and that where the relief valve is.I wouldn"t move it far in that condition ,,you may worpe the drive plate. you need pres. to lock chutch up. good luck

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