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Relief valve replacement

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Jeff Pritts

04-16-2003 08:29:05




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Got a slow, weak lift so I took off the right side inspection cover and confirmed it's probably the relief valve - lots of turbulance spraying toward the rear. Question is, how do you get to the relief valve? Looks like I might need to take off the cover on the other side to get access. My manual doesn't say anything about it. Also, should I drain some of the oil before trying to remove the valve? Thanks.

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Phil (VA)

04-16-2003 08:53:39




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 Re: relief valve replacement in reply to Jeff Pritts, 04-16-2003 08:29:05  
If the turbulence if low in the reservoir, you probably are correct. As you know, it's at the bottom, looks like a spark plug. It takes an 11/16 stubby wrench. A regular length wrench doesn't have enough room usually. I have found it easier to come in from the bottom big drain hole which is almost directly under it, but that requires you drain everything of course. Otherwise, it is helpful to have both access holes open and have another person help to position the wrench on the valve, like use left hand from right side and your accomplice's right hand from left side, etc., with one holding the wrench and the other guiding it onto the valve. You will get messy arms of course, but that will work. If your fluid is at all questionable, it is a good time to change it and make the job easier. Since the valve is so low in the reservoir, driving the front of the tractor into a ditch or jacking the rear wheels will move some fluid away, but not all. However, that might be of some value just to keep the fluid well below the access holes if you decide to change the valve with the fluid in place. A new valve costs about $25. Hope that helps.

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Jeff Pritts

04-16-2003 11:13:09




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 Re: Re: relief valve replacement in reply to Phil (VA), 04-16-2003 08:53:39  
Excellent response - just what I was looking for. Thanks Phil.



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Ray,IN

04-16-2003 19:14:52




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 Re: Re: Re: relief valve replacement in reply to Jeff Pritts, 04-16-2003 11:13:09  
You can change out the valve without draining the oil or doing any tricks. Just remove the rt side inspection cover as you have already done. Reach in with a short wrench and start working by feel. The valve is under the PTO shaft at the rear of the pump. I have changed mine twice by myself with only an oily arm to wash. The oil level is below the inspection cover as you already know. Do not use a Ford valve! It will fit, but the Ford valve is set to work at less hyd pressure(1,900psi) than the H.Ferguson valve(2,200psi).

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