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Case 430 hydraulic leaking

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PostPosted: Sun Jul 19, 2009 7:12 am    Post subject: Case 430 hydraulic leaking Reply to specific post Reply with quote

Case 430 Hyl oil leaking into transmission rearend I have been told my problem is the seals are leaking in the rockshaft housing I will need to remove the seat and then the housing plate to get at the seals. I am assuming this is the proper way or method to get at these seals? Question: if I remove the seat and plate and with the tractor in neutral can I start the tractor up and see where the seals are? and where they are leaking? I believe my three point hitch hydraulics are not the problem, stays up overnight, it is the bucket on the front (stays up only three hours) causing the problem. Am I correct in assuming this? If I raise and lower the bucket would I be able to see where the seals are leaking int the rockshaft area. It should be obvious that I am not a transmission - rearend person, and any and all help would be appreciated. Thanks to all and have a great safe day. Barney
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bradley martin
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Joined: 05 Aug 2007
Posts: 1461
Location: London, Ontario Cananda

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PostPosted: Sun Jul 19, 2009 8:51 am    Post subject: Re: Case 430 hydraulic leaking Reply to specific post Reply with quote

No, you cannot remove the lid and observe the rockshaft cyllnder operation as the cylinder is part of the lid. Doubt very much that F.E.L. is the problem as that leakage would either be external or through the valve back into the hydraulic resevoir. If 3 pt is staying up overnite with weight on it, leak is likely seal on PTO drive shaft where it exits transmission case and enters rear end housing. Accessed by removing seat, rear end lid and PTO unit. Seal will have to be carefully chiselled out of seal housing.( You will use a few new word combinations when doing this!!)
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Joined: 08 Dec 2000
Posts: 788

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PostPosted: Sun Jul 19, 2009 11:12 am    Post subject: Re: Case 430 hydraulic leaking Reply to specific post Reply with quote

I don't know if you can see the picture or not kinda small. There are 2 seals in the front and 1 double seal in the rear that separate the oil between the hydraulic and the tranny. If the front 2 are leaking the tractor has to be split between the triple-dual range and the 4 speed. front seals are item 18 rear seal is item 10. also you will need some gaskets

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