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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Boom cylinder repair

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rudy2

06-29-2007 11:32:19




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Hi all,

I have the boom cylinder out of my Case 32 backhoe for seal replacement. I just got the seal kits today and wonder how difficult it will be to get the piston back in the cylinder after I replace the seals? Looks like it takes a fair stack of stiff plastic chevron seals. Do I need to do something special to get this assembled in the cylinder again without damage? Thanks.

Randy




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srs_MN

06-30-2007 19:58:43




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 Re: Boom cylinder repair in reply to rudy2, 06-29-2007 11:32:19  
I've used a regular ring compressor like you would use for piston rings in an engine. Like the other guy said, Make sure you have it lined up straight when you put it together.

srs



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atex57

06-30-2007 17:43:01




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 Re: Boom cylinder repair in reply to rudy2, 06-29-2007 11:32:19  
Use just enough grease to lube it, any extra is trapped beween the chevrons and has to escape as you push it in. The best way is to have a short piece of tubing the ID of the cylinder, slip it over the piston then tighten the piston nut. Let it sit for an hour, then tap the sleeve off and install. An alternative is to use hose clamps to compress them for a while then push and wiggle the piston into the bore, might take two people if it is a large one. Ed.

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135 Fan

06-29-2007 15:48:41




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 Re: Boom cylinder repair in reply to rudy2, 06-29-2007 11:32:19  
I've read that you should smear grease or vaseline liberally all over the seals when putting it back together. The grease will be compatable with oil based hydraulic fluid and help to make the seals slide in easier without damaging them. Make sure to have it lined up as straight as possible when pushing it back together. Dave



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