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Case Tractors Discussion Forum
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Case 430 hydraulic problems

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cletis74

01-12-2007 10:09:31




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Hello, I was wondering if someone could help me out. I have a case 430 with a job master bucket loader. The hydro was strong on it when i got it. But a few months after, the bucket operation started to get a little weaker and jittery. I added case fluid to it the fill port just forward of the seat to get it up to the full line, but it didn't help. The bucket now will hardly move, and it sounds like the pump is cavitating. I am going to drain the fluid and change the filter. I was told that the previous owner may have been running 90 weight and by me adding the case oil as it needed I may have thinned out the viscousity, so to rule that out I am going to drain it and replace it. Should I use the manuf. specific, or 90 weight? I am also going to check the return line for collapse and put a tee line by the bucket cylinders to check pressure. The book I have is horrible, and covers about 30 models. It references checking the "front pump, resevior, and lines if installed". Does the 430 have a front pump and res? If so where are they located and what is the required maintenance? Thanks.

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cletis74

01-16-2007 14:41:32




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 Re: Case 430 hydraulic problems in reply to cletis74, 01-12-2007 10:09:31  
Thank you for your help, and I believe you are right, that i added hydro mistakenly to the rearend res. My question is, where exactly is the hydro fill then? There is no other plug on the exterior of the vehicle. Under the front lip of the seat there is a breather and a plug that when unscrewed has a dipstick on it. Farther forward (to the left of the hi lo range shifter) there is another breather on a piece of pipe, but no plug, then under the cowl by the steering shaft is another breater. Is it possible that the breather that I am seeing that is mounted on the pipe has replaced the plug?

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dwag

01-13-2007 08:06:52




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 Re: Case 430 hydraulic problems in reply to cletis74, 01-12-2007 10:09:31  
Case utility tractors can transfer oil from hyd res. to final drive oil. Make sure hyd oil level is OK. On oil type, I think any hyd oil is OK in hyd and rear end.(Hy-Tran, Hy Gard, TSC, et.) 90 wt\gear lube was needed for protection in early days when oil technology was young. IMHO. Your on the right track checking press. Tractor hyd pump and relief valve are under trans cover.



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John Saeli

01-12-2007 15:07:16




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 Re: Case 430 hydraulic problems in reply to cletis74, 01-12-2007 10:09:31  
Hey Cletus: You may have topped off the Tranny fluid which takes SAE 90, or my preference, 85W140. The Range Housing serves as the Hyd. Reservoir. The fill for that is farther front, under the steering column. A front pump would be quite noticeable. It drives off the front crank pulley.



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