Casematic oil leaks into trans. rear diff.?

Genos · Dec 24, 2012

Have to add oil to casematic and drain excess amount out of rear end. have repaired rock shaft piston and it don't leak down. would new gasket between hi-low range gearbox and trans.
stop this leak? anyone had this happen?
i know would have to split tractor. Thanks Gene

DKase · Dec 25, 2012

What model? I have 2 830's. One leaked rear end into COM. I pulled that COM out and replaced the seals back in there, and fixed that problem. The other one leaks like yours which is more common from what I have heard. Will take splitting and pulling the COM which will take the special fixture to handle the thing. Service book shows plans to build the fixture and procedure to replace the seals.

mEl · Dec 25, 2012

Yes, a model number would be helpful. I am assuming that you have a small series tractor so I am posting additional info that does not pertain to tractors such a DKase has.

Since you have already done the rockshaft, there are two other places possible, neither one requiring COM removal.

The PTO shaft seal at the rear of the sliding gear shaft in the rear right next to the ring and pinion and the seals between the range box and the main tranny. Of course that set is a split but a very easy one. Just get everything supported safely.

Hopefully Joe can post some pics and when you get a look at it it's fairly obvious what must be done. The two back to back seals are located in a retainer between the range box and 4 speed so the box must be removed to get to them.

Genos · Dec 25, 2012

Sorry Guys it is a 611-b

Joe Young · Dec 26, 2012

Below is a diagram of the mainshaft (top shaft). The PTO shaft runs in the center of this shaft necessitating seals to keep the hydraulic fluid in the front reservoir.

The needed part numbers are: (prices are what is quoted at my local dealer).

G13802 - Oil Seal, Rear Mainshaft - $32.03
G10422 - Oil Seal, Front Mainshaft (part subs to A155950) - $16.65 (2 needed)

Joe Young · Dec 26, 2012

Here are some SKF part numbers for the seals:

Case numbers: G10422 & A155950 ----> SKF-15592

Case number: G13802 ----> SKF-13649

Joe Young · Dec 26, 2012

I forgot about the gasket between the range gearbox and the primary gearbox. It's Case part number G46841 which subs to Case part number 1342380C1. My dealer has it for $6.40

See the large arrow in the diagram below.

Anonymous-0 · Jan 12, 2014

I am having the same problem with my case 311. My question is; when I remove the pto shaft, should any hyd oil come out of the main shaft (the hollow shaft that the pto shaft goes into)? It wasn't a lot, but made me wonder..... Thanks!

pcweber · Jan 12, 2014

Not sure what the condition your tractor or commitment you have to going in deep & splitting but I read a while back of a guy who got some plumbing fittings and tied the 2 reservoirs together with a fuel grade hose between the 2 drain plugs at bottom. I know it is not right but for a light duty acreage/ hobby tractor not used in the field it may be.

Casematic oil leaks into trans. rear diff.?

Genos

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DKase

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mEl

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Genos

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Joe Young

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Joe Young

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Joe Young

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Anonymous-0

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pcweber

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