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Case Tractors Discussion Forum

Case -O - matic 10 wt Or 90 wt

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J Heitkemper

03-24-2007 02:48:37

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HI Guys, Just double checking , My 800 operators manual calls for the same oil in the rear tranny gears to be the same as torque covertor , When the tractor came here , Years ago ,{ Before I recieved the operators manual },I topped the tranny off with 90 wt. Now I am going to change all oils and I just want to make sure . I know these oils are not to intermingle ,However I suppose they could and I further suppose that the gears were built to a tighter tolerance for a lighter oil . Just Wondering , Thanx Jim

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Roger H

03-24-2007 08:54:15

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 Re: Case -O - matic 10 wt Or 90 wt in reply to J Heitkemper , 03-24-2007 02:48:37  
Jim, Dad"s "62 830 uses the same oil all the way through. We have used ATF for as long as I can remember, it called for either ATF or Case"s TCH. The torque convertor housing is separate from the transmission, while the hydraulic system oil does come from the transmission. In the last few years I have had TCH in the convertor, it works ok IF you let it warm up a while in the winter, otherwise the gears grind BAD because of the stiffer TCH until it warms up & thins a little. By all means do not use 90 wt in the convertor.

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J heitkemper

03-24-2007 18:35:11

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 Re: Case -O - matic 10 wt Or 90 wt in reply to Roger H, 03-24-2007 08:54:15  
Thanx Guys ,, Til I got the book . I had always believed Hy gard In torque Convertor , I am changing that to Dexron 3 as per recent posts ,,this tractor had been mothballed in the back of my shop since 94 ,, When I aquired it in 92 ,I added about 3 gallon of 90 wt in the tranny ,based on farmboy knowledge of requirements of other tractors . Did not hurt anything to my Knowledge .. .. I will put hy gard in Tranny.. What gets Me is the light oil the engine calls for.. .10 wt winter and 20wt summer ?,Right now on a new rebuild engine I have been running Rotella 15 w 40 . And all seems Well .. Perhaps ? So... Those of you that know oils Feel free to steer me Correctly , Thanx Jim

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03-24-2007 20:46:09

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 Re: Case -O - matic 10 wt Or 90 wt in reply to J heitkemper , 03-24-2007 18:35:11  
Jim, for diesels,the Rotella 15w - 40 is as good as it gets and Sams prices down here are pretty good on it. I used to use Rotella 30w exclusively in all my vehicles because that was what Dad's bulk dealer called "bid oil" and he made me a good deal on it by the case. He was very good about helping young married couples trying to get a start in life!!

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J Heitkemper

03-25-2007 09:30:45

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 Re: Case -O - matic 10 wt Or 90 wt in reply to JGarner, 03-24-2007 20:46:09  
There is Nothing better Than giving people hope and a good start ..And it is Contagious ! ...Sounds like I am doing things O.k...Boy this Ol 800 has got a lot of things to get polished up on . AHHhh,, Springtime !!!Temp here today will reach over 80 !. Thanx for your help . Jim

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03-24-2007 05:43:03

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 Re: Case -O - matic 10 wt Or 90 wt in reply to J Heitkemper , 03-24-2007 02:48:37  
Jim, I think the hydraulics and the COM share oil. I don't have one and my family never did so I am not sure, but I have seen many posts on here concerning the COM and its fluid.

My JI Case dealers service manual for the 630 COM says:
Fluid - 10 Wt
Torque tube reservoir capacity - 4 gal
Replace filter every 200 hours and replace oil every 1000 hours or every season which ever come first.

Bear in mind oil is much better now than it was in the late 50s. I read an article just this week that Ford is saying on its new models that oil does not need to be changed but every 7,500 miles. Remember, for gassers our fuel has no tetraethel lead any more whose combustion by products ended up in our ENGINE oil.

Gear lube and hydraulic fluids should last a lot longer. But to be on the safe side and oil is relatively inexpensive I personally would go by Case recommendations.


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