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Case Tractors Discussion Forum
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300 3 point problem!

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daveminn

12-04-2006 05:21:57




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We have a 300 case roundnose tractor that we use everday to clean our dairy barn with.Been a real good tractor for this to use.Problem:trans dyraulic oil is comming through the vent under the seat at about a gallon a week.Always have to add 1 gallon each gas fill to keep the 3 point lifting.could you drill a hole in the transmission case into the gear shifting housing to let the oil back into that area to fix this?Thanks for any help you can give,Dave A

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rongrong

12-04-2006 17:52:04




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 05:21:57  
your seals are leaking in therockshaft cyl. do you leave the 3pt.raised when the tractor is shut off ? i have a 600 with 3pt parts from a 430 in it, and when its cold out when i leave the arms up they fall and the oil goes intothe trans. lower them, no problem.. the 30 series had a hose that comes from the rockshaft housing through the trans and into the torque housing but i never hooked it up,buy the way new seals would have been around $80.00...

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J heitkemper

12-04-2006 16:02:36




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 05:21:57  
Hi Dave ,,It probably gets pretty cold there ,And you probably do not run this tractor but 1 hour per day ,if THAT ..... ,,.I have wondered the same thing about drilling a hole ,But always have fixed it right,, In Your situation ,and from a Survival point of veiw,, And realizing the Yard tractor is usually the most dependable ,and bused ,and looks like they have run thru about everything imaginable to hell and back ,,I would not be against that drilling suggestion ,, Use 90 weight i the summer ,and 30 in the winter ,,And do not run too long,,and you will probably not have any problems for years to come ,,, Use some LUCAS hub sealer in the hydro pump to swell out the seals ,,,,THE real answer TO REPAIR YOUR HYDRAULIC RAM ,ABOUT A 60 BUCK PARTS JOB ,,and serveral hours of everything going perfect while You whistle while You work ,Or not so good as it did for me and took a week on the 430 The decision is Yours ! good Luck ,JIM

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JRT

12-04-2006 20:26:10




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 Re: 300 3 point problem! in reply to J heitkemper , 12-04-2006 16:02:36  
It shouldn't take that long to do a hydraulic ram job. I did one from start to finish on my 300 in about 2 hours and I am not a mechanic. The 300 is cheap and easy. I think the rings on that one are only rubber 0 rings and they don't cost much. Couldn't be more than 25 or 30.00.



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Joe (Wa)

12-04-2006 09:43:19




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 05:21:57  
The normal torque tube oil level is much higher than the normal transmission oil level. Are you sure it is leaking pass the piston seals as opposed to leaking through the drive shaft seal?

If it is leaking pass the piston seals and you plug the vent the transmission will be pressurized, not only by the leak-bye oil but also by piston displacement during lift. The least that will happen is the pressure will leak out at one or more of the following:

1. Back through the drive shaft seal into the torque tube.
2. Through the differential shafts seals on the brakes
3. Axle shafts seals.
4. PTO shaft seal.

Joe

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C. Amick

12-04-2006 09:32:15




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 05:21:57  
Sounds as if the hydraulic oil is leaking into the transmission and the transmission may be too full? If this is the problem, the seals on the lift arm rock shafts need to be replaced.



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daveminn

12-04-2006 06:26:29




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 05:21:57  
fORGOT TO ASK:
Can you plug the vent to stop oil from leaking?Do you need that vent?Dave a



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Roger300

12-04-2006 09:41:42




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 Re: 300 3 point problem! in reply to daveminn, 12-04-2006 06:26:29  
Dave your hydraulic oil from the troque tube, triple range housing, is leaking into your transmision and causing it to overflow. There are a couple reasons this can be happening, the hydraulic piston under the transmission top may have bad rings or seals and letting oil past it, there's also seals between the torgue tube and transmission that maybe bad. The oil in the transmission shouldn't be above the mark on the dip stick the breather allows for the oil to rise and fall with out forcing oil past the seals when it expands from heat. Roger

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