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You fised a leaky cylinder so you

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Rob

09-11-2004 09:30:32

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increased the system pressure. Remove the inspection plate and look for a blown gasket or relief valve as it trys to lift. You may have to take the load off, raise the arms, turn off the pto, and watch for any turbulence or leak as she bleeds down. Investigate any swirl, spray, or other leak even if you have to lower the fluid level to see where it comes from. You can feel around in the fluid while the tractor is shut off and the arms are bleeding down.

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DanL

09-11-2004 09:51:54

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Re: You fised a leaky cylinder so you in reply to Rob, 09-11-2004 09:30:32

Again, thanks for the replies.

I take it you are referring to a blown gasket somewhere within the pump housing.

Shouldn't the new relief valve have prevented that from happening.

Here's what I think might have happened. The owner tried to pick up too heavy a load and the relief valved opened to lessen the pressure. Having not been operated in a while, trash that settled at the bottom of the transmission has become lodged in the relief valve. I haven't tried it yet but I suspect the arms will leak down quickly with a lighter load.

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souNdguy

09-11-2004 10:42:25

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Re: You fised a leaky cylinder so you in reply to DanL, 09-11-2004 09:51:54

Either is possible.. a gasket blew out from the new load, or the relief/check valve might be stuck.

The previous owner of my N used lots of rtv and that let the gasket blow out.. and I also found a bit of string in the relief valve.. I know that was contributing to my leakdown as well.

Look into the inspection port and you may get your answer.

Soundguy

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Rob

09-11-2004 10:07:12

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Re: You fised a leaky cylinder so you in reply to DanL, 09-11-2004 09:51:54

Could be like you say, remove the inspection plate and see. No big deal. You are going to see a pretty good leak. Lift a light load so you can see the leak but the arms don't fall so fast you don't have time to figure out where it's coming from.

Last time I had a blown gasket I found all eight chamber cover bolts torqued to around 20ft-lbs. They should be near 80ft-lbs. No wonder it blew a gasket. That leak was a 3/4" wide solid spray from the pump to the lift cover. It was shiny in the light and looked like another control arm.

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DanL

09-11-2004 10:43:41

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Re: You fised a leaky cylinder so you in reply to Rob, 09-11-2004 10:07:12

Yeah, I won't know anything until I pull the inspection plate and see what's happening inside.

Maybe I'll get lucky and not need to drop the pump.

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Rob

09-11-2004 10:56:57

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Re: You fixed a leaky cylinder so you in reply to DanL, 09-11-2004 10:43:41

Well I think no matter if it's a relief valve or a gasket you should drop the pump and retorque the bolts on the pump, all of them.
When you repair this leak, say the relief valve, the system pressure will shoot up again. If your pump isn't torqued you're asking for another problem with a blown gasket. Hydraulics are like that sometimes, everything ages and weakens and finally one thing goes leaking so bad you have to fix it. Then up goes the pressure and all the other old and weak stuff starts failing. Hydraulics is a system all connected and dependent on everthing else. Any system with a pump and load is like that. You work on one end you gotta check out the middle and other end carefully or you come back too often.

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