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hydra-mac 8A lift cylinder seal kit?
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<blockquote data-quote="LeoB" data-source="post: 124750" data-attributes="member: 21523"><p>I had my Hydra-Mac 8B boom cylinders redone locally here in Cedar Rapids Iowa. Cost was about $500. The cylinders needed seals and some scratches polished off on the piston. Shop guy told me they had a bear of a time getting the ends of both cylinders to come off so they could get inside. My luck would have been to ding up the cylinder rod and ruin the cylinder. So glad they did it. I saw the cylinders when they were opened up. Lots of gunk on the inside that needed to be cleaned out. No idea the last time they were apart. Tilt/curl cylinders for the bucket are next up.</p><p></p><p>In your initial post, you said "I noticed the boom leaks down pretty good...", to be clear, are you cylinders leaking or are you noticing your boom sags down by itself when you have something in the bucket? If the cylinders are not dripping oil and your boom sags down under load, your control valve could need new seals. In my case, my 8B's boom was sagging down and I had to nudge the hydraulics to lift it as I was moving from one point on a job to another. Not bad but annoying. My control valve's o-rings were bad. My hydraulic shop told me the wrong (too small) size o-rings were in my control valve and they were shot. They showed me the seals and they were definitely shot. One last thing, if your 8A's control valve has two black plastic caps about 1-1/2" in diameter on the size towards the back, be careful if you decide to take your valve apart. Those caps are very, very pricey if you screw them up.</p><p></p><p>If John Bugge (<a href="mailto:jbugge@gvtel.com">jbugge@gvtel.com</a>) can't help you, let me know. Without looking, I'd bet the 8A and 8B boom cylinders are the same. I probably could get seal info from my hydraulic shop.</p></blockquote><p></p>
[QUOTE="LeoB, post: 124750, member: 21523"] I had my Hydra-Mac 8B boom cylinders redone locally here in Cedar Rapids Iowa. Cost was about $500. The cylinders needed seals and some scratches polished off on the piston. Shop guy told me they had a bear of a time getting the ends of both cylinders to come off so they could get inside. My luck would have been to ding up the cylinder rod and ruin the cylinder. So glad they did it. I saw the cylinders when they were opened up. Lots of gunk on the inside that needed to be cleaned out. No idea the last time they were apart. Tilt/curl cylinders for the bucket are next up. In your initial post, you said "I noticed the boom leaks down pretty good...", to be clear, are you cylinders leaking or are you noticing your boom sags down by itself when you have something in the bucket? If the cylinders are not dripping oil and your boom sags down under load, your control valve could need new seals. In my case, my 8B's boom was sagging down and I had to nudge the hydraulics to lift it as I was moving from one point on a job to another. Not bad but annoying. My control valve's o-rings were bad. My hydraulic shop told me the wrong (too small) size o-rings were in my control valve and they were shot. They showed me the seals and they were definitely shot. One last thing, if your 8A's control valve has two black plastic caps about 1-1/2" in diameter on the size towards the back, be careful if you decide to take your valve apart. Those caps are very, very pricey if you screw them up. If John Bugge ([email]jbugge@gvtel.com[/email]) can't help you, let me know. Without looking, I'd bet the 8A and 8B boom cylinders are the same. I probably could get seal info from my hydraulic shop. [/QUOTE]
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hydra-mac 8A lift cylinder seal kit?
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