New Holland T4.75 power star hydraulic problem

[NCJim919]

New holland said the filter base was probably cracked so I replaced it and we inspected the suction pipes again . We saw no cracks in the pipes replaced the filter again . It still jerks on the loader when it gets warm . I removed the loader and baled hay for 4 hours and you can fill it jerking on the small door lift cylinders on the baler . talked to several new holland people they don’t know what is wrong with my tractor . Everything has been replaced the pump, lrelief, loader controls, filter base . Is there something in the remotes or 3 point hitch controls that will act like it is loosing pressure for a second like air in the system

 

[LouNY]

I wonder if your 3 point is miss adjusted and trying to lift to high and bumping up against the 3 points internal relief valve. If you lower your lift arms to about 1/2 or 3/4 full lift height does it bother.

 

[NCJim919]

I don’t really know next time I get it out and get it hot I will try that and see if that makes a different Thanks I will let you know

 

[Leejohn]

Sound like your 3 pt piston is leaking by to me.

 

[21cjoggerst]

The loader jerks really Bad when the oil is hot . I have replaced the pump, loader control valve, relief valve, change filter and oil ,replaced all suction hoses on suction side of pump ,changed the quick couplings and switched the hoses on the lift and replaced the cylinder packing . Installed a flow meter on the lift hose, I have 5.5 gallon a minute at idle and it will drop to around 3.5 when it jerks and go back to 5,5 till it jerks again and pressure stays around 500 when lifting . Pump puts about 11 gallon at 1500 rpm’s .Also removed filter housing and piping to check for cracks When the oil is cold it does not jerk the warmer it gets the worst the jerking. I have talked to the dealers around here they were no help. Any recommendations you have will be very helpful.

did you end up find what was wrong with it. ive got a t4.75 and the loader is jerking also the 3 point and steering is jerking as well

 

[NCJim919]

I sent a e-mail to the factory no help. They said contact a dealer I have spoke to 5 dealers they don’t know what is wrong

 

[LouNY]

One possibility could be the pivot pins are binding, either in the lift arms or if you have it in the self leveling arms.

 

[HTFord]

Did anyone figure out what was causing this on there tractor, I have a 2014 T4.75 and it is doing the same thing mentioned in the original post. 3pt hitch is jumpy the last few inches raised all the way up and loader is starting to do the same only in the raise and lower. Like previous posted, it doesn’t stutter when you first crank it, only when it has cycled 2-3 times then it starts