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Case Tractors Discussion Forum
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Case 870 hydraulic and shifting problems

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Troy Warnken

05-06-2013 08:46:55




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Hello, New to this forum and new owner of a I think its a 72 Case 870 diesel with power shift. Okay bought the tractor last week and everything was working. Started changing fluids and filters, doing the Hydraulic first. In changing it found it was way overfilled by 5 gallons. Second once I got it everyting changed started the tractor up and everything worked great. Drove the tractor and barely made it back to the yard. The pressure dropped from in the green to red and the steering was gone as well as the 3pt lift. I let her set for about an hour and started it again and was able to move her back to the shed. Let it sit over night and tried again yesterday. When I cranked the wheel back and forth the pressure slowly came up and with out the clutch pushed in the engine kicked down like the power shift was being used. Also one of the lines coming from the pump is chattering quite a bit. Do I have air in the system or is this something more serious. Any help greatly appreciated.

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mEl

05-07-2013 04:44:53




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 Re: Case 870 hydraulic and shifting problems in reply to Troy Warnken, 05-06-2013 08:46:55  
Rereading your original post, The one thing you could check that would cause these symptoms is a cut oring on the feed tube at the inlet port of the hydraulic pump, it's an easy task and if air is entering the hydraulic supply it most definately can be there. If you find a cut o ring, dress the edge of the suction pipe till it has a small radius to allow it to enter the oring without cutting it. I do that on every pump replace.

mEl

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brokengun

05-06-2013 11:04:43




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 Re: Case 870 hydraulic and shifting problems in reply to Troy Warnken, 05-06-2013 08:46:55  
I have a feeling that you have a clutch or fiber disk failure and the screen to the pump is plugged.

Normally you need to do a pressure check/flow test on the PS/hyd system to determine the problem

What type of oil did you use when you changed it?

I once changed oil in a cherry 1370 and the oil I used dissolved the glue underneath the fiber disk plates and plugged up the oil intake screen.

P.S> An 870 is worth fixing so if you do have a major problem please consider fixing it

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John Saeli

05-06-2013 12:55:17




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 Re: Case 870 hydraulic and shifting problems in reply to brokengun, 05-06-2013 11:04:43  
Curious as to what oil you used that disolved the glue holding the fiber on. All the major brand oils say they are compatible w/ CASE-IH, but contributors to this forum have had other experience.



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brokengun

05-07-2013 00:04:12




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 Re: Case 870 hydraulic and shifting problems in reply to John Saeli, 05-06-2013 12:55:17  
Marathon 577 was the oil i used. It eat the glue right out from under the plates the fiber disk peeled like the skin on an onion.

The C4 plate fiber disk was very close to like new thickness when they failed.

In the end I split that tractor 4 times before i got everything fixed. Every disk except the TLC failed.

The only reason the TLC didnt fail was because the guy that owned the tractor before me put a NEW case rebuilt engine and a new TLC at the same time

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mEl

05-06-2013 14:46:52




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 Re: Case 870 hydraulic and shifting problems in reply to John Saeli, 05-06-2013 12:55:17  

John Saeli said: (quoted from post at 12:55:17 05/06/13) Curious as to what oil you used that disolved the glue holding the fiber on. All the major brand oils say they are compatible w/ CASE-IH, but contributors to this forum have had other experience.


The 870 has external dry brakes, no diff lock and unless someone has had it apart and put new C4 stuff in it should have all sintered brass clutch plates in it. I'm not saying that could not have been done but all 70 series of that vintage had sintered brass plates, including the large C4 plate, not till much later was the gray fibre plates used and I'm not sure the others were ever subed to the early tractors, the fact that the failure is heat related leads me to believe you have pump wear. Pay a competent shop to perform a flo test on the system, with one hookup right at the remotes the entire system can be diagnosed including the power shift clutch leakage. Anything else is speculation. . mEl
This post was edited by mEl at 14:48:11 05/06/13.

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Troy Warnken

05-06-2013 11:12:57




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 Re: Case 870 hydraulic and shifting problems in reply to brokengun, 05-06-2013 11:04:43  
I used Ultra Tran from the local Case dealer. The pressure was better today than yesterday on the gauge. Do you think I need to bleed the brake system it said to do that on the directions when I changed the filters but the dealer didnt think I needed to.



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D-C-741

05-06-2013 10:56:05




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 Re: Case 870 hydraulic and shifting problems in reply to Troy Warnken, 05-06-2013 08:46:55  
If the Tractor Sat & not used or used very little =Oil Slime & It will Plug up the filters = you have to change them several times to get it cleared up.Once bought a 970 that had the problem it sat for 5 years



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Troy Warnken

05-06-2013 10:59:42




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 Re: Case 870 hydraulic and shifting problems in reply to D-C-741, 05-06-2013 10:56:05  
Okay, Do I need to get it good and warmed up before I change the filters again? With the pump chattering is this because of air? or something else?



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Dalet

05-06-2013 09:56:47




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 Re: Case 870 hydraulic and shifting problems in reply to Troy Warnken, 05-06-2013 08:46:55  
Maybe there is the wrong dip stick in the tractor? I would guess the previous owner put in extra fluid and it worked better. Just a thought.



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Troy Warnken

05-06-2013 10:37:30




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 Re: Case 870 hydraulic and shifting problems in reply to Dalet, 05-06-2013 09:56:47  
No dip stick it has two sight plugs on the side for filling plus I checked with the local dealer on the capacity. Thank you for the thought



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