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Thread: Another tale from the junk yard

  1. #1
    Mac Daddy Sponsor Al Smith's Avatar
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    Default Another tale from the junk yard

    This is about old hydraulic cylinders .The older style were made to be rebuilt forever it's just very few do it .They are 3000 PSI rated but built differently than a modern cylinder .The shaft seals for example were made originally with preformed rope seals but standard valve packing will work just as well.The type used on big high pressure steam valves .
    You just get the correct size,this was 3/8" and cut the rings at a 45 degree angle,pound them in with the gland nut and drown them with penetrating oil then stuff the next one in and do same .They will wear out in time but it takes a long time .The hydraulic oil keeps them supple and they do weep but not leak .These were squirting about a half pint of fluid like a hill billy spitting tobacco juice every time I tilted the cylinder.20 minute job,now it doesn't leak.

    Good ole Ollie is running like top though .Second gear,uphill spinning the tracks and never missed a beat .Not bad for an old fart much like myself .
    Attached Thumbnails Attached Thumbnails DSCN0518[1].jpg  

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    Woods walker Sponsor Burnham's Avatar
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    If I'm ever in the position of being both exceedingly wealthy and needing a brilliant fixer to keep all my old school mechanicals running right, I'm going to hire Al at twice whatever cost he desires, to take care of my stuff .
    "Confidence is the feeling you sometimes have before you fully understand the situation."

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    Mac Daddy Sponsor Al Smith's Avatar
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    It's just trivia stuff I picked up from turning wrenches since I was young .I've got tricks my dad taught from real "old school " stuff done in the late 30's .Very few people have ever heard of them but not too many work on stuff that's 50-70 years old .I had an old guy that was 80 years old tell me how to hob a worm gear wheel on an engine lathe and I did it .After first doing a lot of calculations of course .Thank goodness for pocket calculators .

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    Treehouser Sponsor Tree09's Avatar
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    Now that's badass..... thanks man!!!!! Keep em coming!!!
    Kyle


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    Mac Daddy Sponsor Al Smith's Avatar
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    I wish the monsoons would stop so I can lay down the stone pad for the shipping container .Too damned wet,you can't grade mud .If the rains keep up the farmers will have to plant rice .

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    Treehouser Sponsor Tree09's Avatar
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    Well that's no good, cause I'm headed your way Monday. I won't want rain outs....
    Kyle


  7. #7
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    For the cylinder, do you take out all the old packing and make completely a new one, or just add a new ring of rope and compress it on the old packing, squeezing this one tighter?

  8. #8
    Mac Daddy Sponsor Al Smith's Avatar
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    You pull the old ones out .This only had two and they were smashed thin .I'd imagine they started out about 3/8 thick and wore down after many years in service to less than 1/4" I couldn't screw the grand packer in any farther .
    That "rope" by the way is graphite impregnated material commonly called a "Chesterton" seal .It was in fact made by the Chesterton company one of the oldest seal manufactures in the United States .They are still business making specialty products .
    Another thing to keep in mind this was before they chrome plated the cylinder rods .They can rust but the weepage of the seals lubricate them but it does wear out the sealing material .My Caterpillar D4's have six rings and 5" cylinders with 2" rods .

    The Oliver crawler with 3" lift cylinders is very fast on the blade action .The Caterpillars with 5" cylinders are slow as a snail .They can hog out the dirt but are a pain in the butt to shoot grade with . Most people can't as a matter of fact .I can because I've operated old antiques for decades .In a way I guess I am one now myself.

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    Thanks Al.
    I can't even level with a shovel, so, with a dozer ...
    I tried with a mini excavator once, like one ton and half, but it was a pita and the result wasn't motivating

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    Treehouser Sponsor Cobleskill's Avatar
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    Not an easy machine to learn to run. I rented one 3 or 4 times to do stuff on the farm. You can't see what you are doing, you see what you have done. You have to get a feel for it.