Hydraulics quit working after getting hot. Mostly a loss of power to the point of driving backwards to get out of the way. Help

[Dmacleo]

Again I'd take look at relief valve or pressure regulator. Whatever the valve called that you can adjust near the underside of the deck height adjust. Can't remember the nomenclature right now.

this is what I was thinking of

HOW TO: Adjust the Pressure Relief Valve (PRV) on the MF GC 1705/10/15/20

I know there is threads all over this forum on how to adjust to spec or over spec the PRV valve so I decided to make one for the MF GC 1700 series... we can't be worse than Kubota BX and John Deere 1 series owners. :thumbsup: ***I AM NOT RESPONSIBLE FOR DAMAGE DONE BY ADJUSTING THE PRV ON YOUR...

www.tractorbynet.com

The PRV is located behind the mower height adjustment knob on the Left side of the tractor beneath the seat.

that valve.
any pressure relief valve thats worn can exhibit these symptoms when hot

 

[Dmacleo]

Any updates? Very interested to see what's going on.

 

[dieselscout80]

Can you explain to me what the PRV symptoms are and what it is doing?

Are you say it’s bypassMing to much/often?

 

[Dmacleo]

Can you explain to me what the PRV symptoms are and what it is doing?

Are you say it’s bypassMing to much/often?

saying its possible. I'll see if I can find out in mtx manual later today if there are any test procedures specifically for that valve.

edit: manual does not give any test procedures for it just specs and replacement torque values.

 

[dieselscout80]

The reason I asked is I think my tractor hydraulics are over heating too, but on a completely different type tractor, so any insights are welcome.

 

[Dmacleo]

The reason I asked is I think my tractor hydraulics are over heating too, but on a completely different type tractor, so any insights are welcome.

prv on gc2400 is spring loaded valve, when springs on a prv are worn they sometimes don't react correctly when hot.

 

[CalG]

A comment:

Not the same tractor, and may be quite unrelated, BUT......

The little B7200 HST has a detent on the 3point lift control. Can't for the life of me figure out why, (Might be something catching that's not supposed to, I really should look into it)

But, If I'm working the tractor hard , and that detent is engaged, and don't notice the hydraulic whine, the lift oil all goes through the control valve over pressure port. The fluid heats up quickly when that happens.

This goes along with all the mentions of OPV ...

Just something to check, Make sure no hydraulic control valves are blocked! These are OPEN CENTER SYSTEMS, and designed for unrestricted flow unless being called for.

 

[cdaigle430]

How does the HST fan look? Its on the Drive shaft....

 

[ray66v]

I hope this isn't another one of those threads where we never find out what happened.

 

[Dmacleo]

I hope this isn't another one of those threads where we never find out what happened.

been 14 days since last post, all 4 posts by member in this thread, so yeah thats exactly whats going to happen.