IH 1466 Hydro problem

Walt7777777 · Nov 24, 2008

IH 1466, seems like hydraulic pressure is not good enough to split harder woods like oak. Have 4600 hrs on tractor. I have removed the pump and the o-rings all look good, guess it is time to get a new pump. Anyone out there have any ideas to confirm it is getting bad?

ben brown · Nov 24, 2008

get a 5000+ psi pressure gage plug it into the remote see if your getting 2300 t0 2500 psi. then go from there relief valve pump

Walt7777777 · Nov 24, 2008

My Manuals are not very good. Where is the relief valve located, I have a cab on mine and cannot see well. Pump is already out, so I would have to get another gasket to test pressure. If low, how do you tell if the pump is bad or relief valve is bad?

I also tried the 2nd set of ports with same result. I noticed that the pressure has gone down over the last couple of years.

Any help/comments appreciated.

Thanks,

Mike

Owen Aaland · Nov 24, 2008

The relief valve is on the right side just below the seat. It looks like a bolt with a thin head. The PSI rating of the valve should be stamped on the end.

If the pressure stays about the same through the entire RPM range from low idle to high idle, the valve is limiting the pressure. If the pressure goes up from idle as the RPMs increase there is either a weak pump or a leak.

Walt7777777 · Nov 24, 2008

Thanks for the reply.

I do not have a gage, but I can tell that the pressure increases as the RPM increases. I don't see any visible sign of leakage unless it is internal. Is the by-pass valve have an adjustment for pressure? If so, I will get a gage and check, what should the pressure be?

Thanks for your answers.

Mike

bc · Nov 24, 2008

Don't forget to clean the screen and replace the filter. The screen and filter partially blocking the flow will affect the output. You will hear some whine with it when that happens.

Unless you tore the gasket, bolt it back up. The pump housing isn't under pressure. It just hold the fluid in the cavity behind it. I change the filter on my 2606 a couple times and haven't replaced the gasket yet on that plate and no leakee.

I'd look for something or some sludge holding a check ball or relief valve open. Anywhere you see a thin bolt head as Owen said. Not all have the psi stamped on them or else they are painted so you can't see it.

Flow test the pump with a clean 5 gal bucket. Mark at 1 gal intervals. Take a line loose and time how long it takes to pump a gal or two. Then replace the fluid. As pumps decline so does the gallons per minute it puts out.

If your pump runs more than one system, then you need to isolate them to find what is wrong. Not as likely, but a leaking piston seal on a cylinder will allow flow by and loss of psi so check all your cylinders.

Owen Aaland · Nov 24, 2008

(quoted from post at 12:26:42 11/24/08) Thanks for the reply.

I do not have a gage, but I can tell that the pressure increases as the RPM increases. I don't see any visible sign of leakage unless it is internal. Is the by-pass valve have an adjustment for pressure? If so, I will get a gage and check, what should the pressure be?

Thanks for your answers.

Mike

The pressure should be somewhere between 1600 and 2500 PSI depending upon which relief valve is installed. The PSI rating of the valve is stamped on the end of the valve.

bc · Nov 25, 2008

You could check to see what the stock psi relief valve is. Some like my 2606 made in the 60's were 1600 psi. The IH 3000 loader came with a 2000 psi popoff.

IH 1466 Hydro problem

Walt7777777

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ben brown

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Walt7777777

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Owen Aaland

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Walt7777777

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bc

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Owen Aaland

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bc

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