John Deere 2850 Hydralic issue

[tombrown2850]

Hi

I have a problem on my John Deere 2850 where the Hydralic system keeps building up pressure and it then snaps the bolt on the Hydralic filter which holds it on underneath the tractor as soon as you start it once the pressure has built up.
It first started where the hydraulic pressure would completely go and you would loose all steering and loader controls and all the other things used by the hydraulic system. But now its doing this where the pressure just keeps building up.
Does anyone know what's wrong with it and how to fix the problem?

thanks

 

[Tractortech]

Now Then..
Put a pressure gauge in the port in the filter bowl. It's 1 1/6" UNF. It should read 10.5 bar, or 155 psi
Alternatively, remove the filter bypass valve and check it. Have you got the correct filter in it and preferably a genuine one??
I've never seen a tractor break the filter bowl bolt in 40 odd years,,, eh..

 

[Welderloon]

Now Then..
Put a pressure gauge in the port in the filter bowl. It's 1 1/6" UNF. It should read 10.5 bar, or 155 psi
Alternatively, remove the filter bypass valve and check it. Have you got the correct filter in it and preferably a genuine one??
I've never seen a tractor break the filter bowl bolt in 40 odd years,,, eh..

I thought you'd like this one

 

[Tractortech]

I thought you'd like this one

Luvvin it!! 🛠

 

[tombrown2850]

Now Then..
Put a pressure gauge in the port in the filter bowl. It's 1 1/6" UNF. It should read 10.5 bar, or 155 psi
Alternatively, remove the filter bypass valve and check it. Have you got the correct filter in it and preferably a genuine one??
I've never seen a tractor break the filter bowl bolt in 40 odd years,,, eh..

it is reading that the pressure is all normal and yes it is the correct filter and genuine. any idea of what else? thanks

 

[Tractortech]

Have you tested the pressure in the bowl?? With an accurate gauge??
How many bolts have failed so far?? Do you have a picture of the failed bolt,,,,, and the filter etc??

 

[tombrown2850]

Have you tested the pressure in the bowl?? With an accurate gauge??
How many bolts have failed so far?? Do you have a picture of the failed bolt,,,,, and the filter etc??

yes all this is done. we have done the obvious.

 

[2850singer]

I have just split the bowl on mine, started it up and 30 seconds later it was split ,any ideas why ?

 

[Tractortech]

Steel or aluminium type??

 

[2850singer]

Steel or aluminium type??

Aluminium

 

[2850singer]

Steel or aluminium type??

Aluminium