Topic: Re: Busted hydraulic top cover
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Yes, a malfunctioning relief valve can definitely crack the top like that. In my case it cracked the cylinder instead of the top so I was lucky. Replacing the relief valve is cheap insurance. After years of sitting they get gummed up and won't open when they should..........that being said, your lift should be adjusted so that it never lifts to it's absolute top limit (or beyond) which would necessitate the valve opening. As John (UK) has said, every so often you should activate the relief valve by lifting the draft lever and lift lever up just so the valve remains cleaned out. Haven't seen John on here in awhile, hope he's ok.
As regards leaks, there is a kit available on this website which includes all the different o-rings you might need..........come to think of it, the o-ring kit I got came with the pump rebuild kit. They are tricky little things to find all of them as they are compressed from years of, well, being compressed and they tend to blend right in with their surroundings. I thought I had extras but eventually found a home for all of them. I recommend replacing them all, again, cheap insurance.
It is normal for these lifts to leak down over time even in pristine condition, I'd say it takes 15-20 minutes after I shut down the tractor before the blade hits the ground.........having said that for safety reasons I put it down every time I park so it doesn't come down on a child or pet.
This post was edited by Inno at 18:11:30 02/26/13.
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