Dual loader cylinder reseal

26Red · Oct 24, 2011

Just finished installing new packing seals in a Dual loader cylinder, what a job! We must have pulled it apart 4 times. Darn bugger still leaks a little to. How in heck to you get those last 3 seals in far enough to thread in the aluminum stop? There's gotta be some special tools used here.

For future reference, how much would a replacment cylinder cost? Stroke on this one is 48".

old · Oct 24, 2011

I learned a long time ago that in the long run taking them to a hyd shop and having them rebuilt can cost a lot less then trying to do one my self. Had a Bobcat cylinder on a skid steer that we tried to rebuild 2 or 3 times with a cost of $30 per kit. I finally gave up and took it to a shop to have them rebuild it and it cost us less then $30 to have it done. The shop did ask us to do one thing which I thought was odd they wanted it taken apart as in the piston pulled out of the cylinder but other then that they did not want any thing else removed

Bob · Oct 24, 2011

"The shop did ask us to do one thing which I thought was odd"

WHAT is "odd" about them wanting the oil mess at your place rather than their's???

old · Oct 24, 2011

I don't think it was because of the oil but more a thing of it being a pain to pull the piston part out. Bad thing is the shop closed up a few years back so now I have no place close to get cylinders rebuilt

fixerupper · Oct 24, 2011

Did you get the stop threaded in all the way to the end of the threads? You might have to lightly tap the seals into place with a thin (maybe 1/4") piece of hardwood with a blunt end, working all the way around them. If it's the same as the 320 I had and replaced seals on regularly for 40 years, it's not rocket science. It IS an oily messy job.

I stood the cylinder up in a large pan or cutoff 55gal drum and let the bottom side drain. Then I clamped it in the vice, put a hose on the long return pipe and pulled the ram out full length while the hose was securely placed in a container. Then stand it back up in the large pan and slide the ram back in. Now when you disassemble it with the cylinder clamped in a vise, have the drip pan under it when you remove the seals and pull the ram out. Have plenty of oil dry handy because no matter how careful you are, oil ends up on the floor (wink). Jim

26Red · Oct 24, 2011

Yes it was an oily mess! I did tap the seals in as you describe, but the aluminum seal stop is not threaded in as far as I would like. It's about 1/4" short of were it should be. I'm thinking about taking the cylinder to a repair shop, the threads may need to be chased.

fixerupper · Oct 24, 2011

Sounds like you're on the right track if those inside threads are buggered up. That aluminum seal stop might be made out of 'unobtainum' so you don't want to wreck the threads on it. Not very many of us farmers have tools to chase threads like that. Years ago I made a tool with a couple of pins and a handle to screw that stop in and out of the cylinder. Got it hanging on the east wall of the shop where I can find it. Jim

Dual loader cylinder reseal

26Red

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old

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Bob

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old

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fixerupper

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26Red

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fixerupper

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