Case 885 hydraulic issues

Classichay

Member
Arable Farmer
Location
The moon
I’ve a case 885 which we’ve been having a well know fitter fix since October and to be fair I’ve got past the point of being blunt.

he’s swapped round loader feeds and diverted the pipe into the back end filler cap, however it’s now pressuring the back end that bad it’s pushing oil out the three point linkage top shaft seals, and this is my main concern, the clutch has gone very sharp and I’m concerned it’s now pushed oil into the clutch. But what I’m concerned is that there’s a vibration appeared and I’m sure he’s starved the transfer pump in the gearbox not back ended

I’ve made a few calls to the mechanic and I just don’t seem to be getting anywhere, has anyone any rational ideas? I think I’ve 500.00 outstanding on the bill, but I’m struggling to justify remotely paying this as it’s done a lot more harm than good.

 

jamc

Member
Mixed Farmer
Location
n ireland
I’ve a case 885 which we’ve been having a well know fitter fix since October and to be fair I’ve got past the point of being blunt.

he’s swapped round loader feeds and diverted the pipe into the back end filler cap, however it’s now pressuring the back end that bad it’s pushing oil out the three point linkage top shaft seals, and this is my main concern, the clutch has gone very sharp and I’m concerned it’s now pushed oil into the clutch. But what I’m concerned is that there’s a vibration appeared and I’m sure he’s starved the transfer pump in the gearbox not back ended

I’ve made a few calls to the mechanic and I just don’t seem to be getting anywhere, has anyone any rational ideas? I think I’ve 500.00 outstanding on the bill, but I’m struggling to justify remotely paying this as it’s done a lot more harm than good.

Is there not two chambers in the backend casting with a levelling hole in the divide. This hole could be blocked
 

Classichay

Member
Arable Farmer
Location
The moon
Is there not two chambers in the backend casting with a levelling hole in the divide. This hole could be blocked
That’s what I’m wondering he’s blanked off the link pipe from the pressure relief valve and taken that feed through the loader valve block and then into the back end. The vibration I’m hearing I’m worried is the transfer pump from the first chamber.
 

sc4545

Member
Location
kinnegad ireland
the back end cant breathe as he has the breather blocked the oil is forced into the tractor and the air has to go somewhere so it's finding its easiest way to vent.
The correct place to put a return on these is in front of the RHS half shaft below the oil level. I would try this and return the breather to its normal place, I would say this will cure your problems
 

Classichay

Member
Arable Farmer
Location
The moon
the back end cant breathe as he has the breather blocked the oil is forced into the tractor and the air has to go somewhere so it's finding its easiest way to vent.
The correct place to put a return on these is in front of the RHS half shaft below the oil level. I would try this and return the breather to its normal place, I would say this will cure your problems
Do you know what size fitting this is?
 

sc4545

Member
Location
kinnegad ireland
I'm not sure it's a big plug I think it's a 17 or 19 Allenkey from memory.. I got one in a breakers yard and drilled it out to welded a 1/2 bsp fitting on to it so it saved draining all the oil.. I'm sure gapples would know the exact size if someone knows hows to tag him in this..
 

Gapples

Member
I'm not sure it's a big plug I think it's a 17 or 19 Allenkey from memory.. I got one in a breakers yard and drilled it out to welded a 1/2 bsp fitting on to it so it saved draining all the oil.. I'm sure gapples would know the exact size if someone knows hows to tag him in this..

The bung under the RHS back axle is usually 1 1/2" AF, that said if you you take a flow & return as previously mentioned, that is under the seat, from the aux valve feed pipe to the loader valve, from the loader valve & back into the aux valves that will work.
IF the loader valve also has a third pipe, a free flow return, then that goes in below the RHS back axle.
The filler bung should never be used as a return port & it should have a breather in it.


I hope this clears it up for you.
 

Pennine Ploughing

Member
Mixed Farmer
as Gapples says, the return needs to be below the oil level,
it wont be pressurizing the back end, it will be frothing the oil, then this causes cavitation and then the pump will be drawing a mix of air and oil, this will cause a wine and vibration of the pipe work,
its a simple mistake,

however you never said what the start of the problems were when you called him out
 

Classichay

Member
Arable Farmer
Location
The moon
as Gapples says, the return needs to be below the oil level,
it wont be pressurizing the back end, it will be frothing the oil, then this causes cavitation and then the pump will be drawing a mix of air and oil, this will cause a wine and vibration of the pipe work,
its a simple mistake,

however you never said what the start of the problems were when you called him out

there wasn’t an issue until the pump was fitted then vibration started and it’s just got worse since then. However I’m concerned it’s pushed oil into the clutch
 

Gapples

Member
There is a rectangular plate that can be removed to inspect. If oil was really flying out of the transmission you would see oil coming out around the plate.

The earlier TA set up ( if fitted ) were prone to leaking a bit oil into the clutch housing anyway, the later & modified earlier versions are not.
Either way I can't see how the other issues you describe can "push' oil into the clutch housing, they can't.
Oil either leaks through the seals or it doesn't.
Concentrate on fixing your other problems first but do check into that tin plate under the clutch housing, it's held on with 2 - 9/16af spanner size bolts.
 

Pennine Ploughing

Member
Mixed Farmer
there wasn’t an issue until the pump was fitted then vibration started and it’s just got worse since then. However I’m concerned it’s pushed oil into the clutch
Cavitation is the problem air and oil mixed,
That should not put oil on the clutch, as the seal will hold the oil back, and far easier places to get out first like dip stick, of breather,
If oil is getting on clutch, then the seal is gone before this happened,
Sounds like the pump is the root of the problem, as you said there was nothing wrong before new pump fitted, and a cycling pump can cause cavitation,
Reinstate the pipe work back to how it was first, and fit a new pump
 

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Red Tractor drops launch of green farming scheme amid anger from farmers

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As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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