NH TM150 Hydraulic trouble.

[TractorJockey*]

Hi,

I was referred over here.

I have a New Holland TM150 that has the reoccurring problem that the hydraulic hose on the right side of the engine bursts up by the cooler. I'm up to 5 times now and it is getting annoying, it new happens at a convention time.

I'm thinking that it might be a restricted cooler that causes an overpressure in the hose. But I have zero knowledge of the hydraulic system on the blue thing and wouldn't know here to start.

Any ideas on diagnosing or test the system?

 

[WM75Guy]

Welcome to TBN. Get a copy of the service manual. You can download one from several sources for not a lot of money. See if it has a process to test for a restriction in the cooler. Absent that, the parts diagram shows a combination of rigid and flexible hydraulic lines. I would make sure a hydraulic line isn't getting crimped by movement. Then I would put a hydraulic test gauge inline on each side of the cooler to see what the pressure is to test for restriction. A radiator shop should be able to clean the cooler out and check for restriction as well.

https://www.messicks.com/catalogs/n...02-1-29-7-02-gearbox-lubrication-piping-c5315

 

[GrandpaSmurf825]

You could get better hose but that would be treating a symptom rather than the ailment IMHO. There is a relief valve in the cooler circuit and I would be possibly changing that first. The hose is keeping you from blowing up the cooler itself. You could probably tee in a pressure gauge and see what the system is maintaining for pressure both cold and hot. The relief valve is set at 45 PSI it appears. I'd be more inclined to think the pressure is running to high. At least get a pressure reading so you know what's going on. I think there is also a thermostat in the system because in cold weather you don't need to circulate the oil through the cooler unless the temperature it gets high enough to open the thermostat. The optimum temperature is usually around 150 degrees.