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Allis chalmers a500 cylinder help please
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Vonholt View Drop Down
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Joined: 13 Jul 2019
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Vonholt Quote  Post ReplyReply Direct Link To This Post Topic: Allis chalmers a500 cylinder help please
    Posted: 13 Jul 2019 at 7:46pm
Need help i have a allis chalmers a 500 forklift it started leaking hydraulic fluid at the top of main cylinder that lifts the forks up and down i took the cap off the top there were 2 O rings then layers of something that looking like dirt i took the cylinder off and rebuilt it still same issue is there somwthing I'm missing,that goes in between the O rings im lost and cant find any diagrams or specs for it any info be greatly appreciated thanks
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NomoreJohnDeere View Drop Down
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Points: 308 		Post Options Post Options   Thanks (0) Thanks(0)   Quote NomoreJohnDeere Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jul 2019 at 9:16pm
does it look like there is a place to put something in between the orings?

recess or groove or....

packing maybe, fiber or plastic like sleeve?

your local shop can match up most stuff
HD3
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Dnoym N. S. Can. View Drop Down
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is this any help?
                         B:-)  Dnoym
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Vonholt View Drop Down
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Vonholt Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2019 at 1:23pm
I looked at the manual you sent me link to it shows picture of two seals it says but doesn't give a part number when i took it apart it was like a layer of dirt then o ring then more of the dirt looking stuff then another o ring I'm thinking this was some kind of packing its just maybe desinagrated over time were it's so old according to the manual i downloaded it calls for 2 seals not o rings which was what was in mine the local hydraulic shop i got the parts from just assumed,it was dirt and,grit in there but i don't think,that's the case.
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Vonholt View Drop Down
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Vonholt Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2019 at 1:50pm
Iv done some more searching looks like it calls for 2 poly pak there calling not sure what that is though
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Vonholt Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2019 at 2:26pm
Believe iv figured it out it calls for 2 poly pak seals from what information iv read there is a o ring in these seals so over time the seal part had broke down and just turned to dirt pretty much and just,left the o ring behind. So now i got to find 2 of these poly pak seals and,that should fix me up i appreciate all,the help the manual really helped me out on this I'll update ya let you know if this fixes it
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Dnoym N. S. Can. View Drop Down
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Points: 544 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Dnoym N. S. Can. Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2019 at 2:26pm
PolyPaks are multi-purpose seals that are precision molded, multi-purpose sealing devices combining an O-Ring type O-Spring with a conventional lip Seal. PolyPaks provide excellent seal from hard vacuum to more than 60,000 Psi. The PolyPaks won’t leak under low pressure like many conventional U-packing seals and maintain lip loading on the ID and OD interface during temperature extremes.


   is this any help?
                         B:-)  Dnoym


ps you can try Minnpar  for the parts


Edited by Dnoym N. S. Can. - 14 Jul 2019 at 2:33pm
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