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Case 446 hydrive problem

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eniced73
Join Date: Oct 2013
Posts: 3 pa
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2013-10-08          188095


Hi all. New to the forum. I bought a new house a year ago and a Case 446 Model 14096471 tractor come with it. It worked Ok for a year and then this month I was cutting the grass and it just quit moving. The tractor was still running fine and in the forward position with the mower engaged but it would neither go forward or backward nor engage to cut grasss. I am assuming hydraulics by browsing around some forums. Any help pinpointing the problem would be greatly appreciated. Thanks.



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Case 446 hydrive problem

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kthompson
Join Date: Oct 2005
Posts: 5275 South Carolina
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2013-10-09          188105


To begin with do not know this tractor. But lets talk basics. I assume you have check the hyd oil level if it has hydraulic system, right? So low oil is not the issue.

What does it use to power the hyd system, is it drive shaft or belt driven? Either one be sure they are not slipping or stripped or broken. ....


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Case 446 hydrive problem

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eniced73
Join Date: Oct 2013
Posts: 3 pa
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2013-10-09          188109


Appreciate the reply. First I apologize for the lack of information but forgive me as I know about as much about tractors as my wife. Yeah, that bad.

I did check the hydraulic fluid and it is at level according to the manual. I changed the fluid about 4 months ago as I popped a hose and had to replace it. I believe I used 10W40 oil to fill. The transmission is not belt driven. I am pretty sure it is hydraulic. I crawled under the tractor to find out where the forward and reverse lever went to. I see it goes into the hydraulic control valve. As I move from forward to reverse the levers move in and out of the control valve. Like I said I dont know squat but it seems like a pump issue. Any way to check the pump without tearing out? ....


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Case 446 hydrive problem

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kthompson
Join Date: Oct 2005
Posts: 5275 South Carolina
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2013-10-15          188134


Been away from computer for a few days.

So it ran fine for a while after you replaced the lost hyd oil. Does the manual call for 10w40 for the hyd system? Not the engine but the hyd system.

Is there a filter in the hyd system, if so have you replaced it?

You have looked and it sounds like the linkage is all moving and shifting as it should.

How to test the pump, I would suggest getting a mechanic with gauges to test it. Hyd systems run or are designed to run pressure of say 2 to 3000 PSI and that pressure can be dangerous to let loose. I am not suggesting you try this but if you are determined to do some testing with tractor cut off break a fitting loose very little and cover with a good heavy rag it should run out with tractor running (I would only run at idle) and system being operated. Still recommend you get mechanic in that system.

On the hose bursting, did it run all oil out of the system allowing the pump to run dry? ....


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