NH TC35 weak hydraulics when hot

[newlife]

My TC35 has weak hydraulics when hot, fine when cold. It has only 450 hours on it so I would hope the pump is not warn at only 450 hours. Anyone had any simililar problem on a TC35,40 or 45 gear tractor?

 

[bigbull338]

My TC35 has weak hydraulics when hot, fine when cold. It has only 450 hours on it so I would hope the pump is not warn at only 450 hours. Anyone had any simililar problem on a TC35,40 or 45 gear tractor?

have you changed your hydro filters.they could be stopped up an not letting the oil flow like it should.thus making it get hot an stop working after awhile.

 

[devildog1]

I'm with bigbull,
have you done you scheduled P.M's on your tractor? As I would start there.
DevilDog

 

[newlife]

I'm with bigbull,
have you done you scheduled P.M's on your tractor? As I would start there.
DevilDog

Yes the filter and the hydraulic fluid were changed less than 50 hours ago.

 

[jinman]

You cannot make an objective qualitative judgement of your hydraulic performance without a pressure test. Do you have a loader where you could put a pressure gage at the quick connects? How are you judging your hydraulics? Does it lift something on the 3PH when cold, but not when hot? Is the loader weak? You've GOT to know the pressure. No responsible tech would adjust your pressure without testing it first.

 

[evan price]

Without seeing your machine, problems when hot typically boil down to something having excess clearance and internal leaks. Perhaps an O-ring failing in the valve, the pump is worn out, a cylinder is leaking/bypassing inside, etc.
You can't diagnose this sort of problem without finding out what pressure the system is putting out under load.

 

[RickB]

Pressure, pressure. It's half the equation, and even when the flow is going to sleep, your relief pressure is probably being maintained. A full-blown pressure/flow test is indicated. That said, clean oil, fresh filters and diminished performance as the oil temp increases more often than not indicates a worn pump. And no, pump failures are not typical of Nh TC Class III CUT's.

 

[wdchyd]

Pressure, pressure. It's half the equation, and even when the flow is going to sleep, your relief pressure is probably being maintained. A full-blown pressure/flow test is indicated. That said, clean oil, fresh filters and diminished performance as the oil temp increases more often than not indicates a worn pump. And no, pump failures are not typical of Nh TC Class III CUT's.

:drink:........Here, Here.....Right on RickB......

Kubota Flow/Load Meter Test - Tractor Videos - Kubota, John Deere, New Holland and More

I don't mean to wear it out but that's exactly the step I'd take before going on to anything else.......

 

[jinman]

Pressure, pressure. It's half the equation, and even when the flow is going to sleep, your relief pressure is probably being maintained.

My TC35 has weak hydraulics when hot, fine when cold.

RickB, I guess you see "weak" as meaning slow. To me, weak means it doesn't have the power to lift at any speed. If the relief pressure was being met, would the hydraulics be weak or slow? I agree completely that a full pressure-flow test is indicated, but I would still like to know how newlife defines "weak."

 

[RickB]

RickB, I guess you see "weak" as meaning slow. To me, weak means it doesn't have the power to lift at any speed. If the relief pressure was being met, would the hydraulics be weak or slow? I agree completely that a full pressure-flow test is indicated, but I would still like to know how newlife defines "weak."

Weak is often slow, as a partial load in the loader or on the hitch makes the system develop less than relief pressure.

Better to ask the OP what he means by 'weak' than to ask me.