Allis chalmers a500 cylinder help please
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Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=162770
Printed Date: 19 May 2025 at 3:33pm
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Topic: Allis chalmers a500 cylinder help please
Posted By: Vonholt
Subject: Allis chalmers a500 cylinder help please
Date 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 |
Replies:
Posted By: NomoreJohnDeere
Date Posted: 13 Jul 2019 at 9:16pm
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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 |
Posted By: Dnoym N. S. Can.
Date Posted: 13 Jul 2019 at 9:47pm
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http://www.minnpar.com/manuals3.asp?FName=ALLIS%2DCHALMERS%2C%20CDS%20%28CNH%29%20MANUALS&SFName=RT%20FORKLIFT%20%28ALLIS%2DCHALMERS%2C%20CDS%29%20PARTS%20MANUALS" rel="nofollow - https://www.minnpar.com/manuals3.asp?FName=ALLIS%2DCHALMERS%2C%20CDS%20%28CNH%29%20MANUALS&SFName=RT%20FORKLIFT%20%28ALLIS%2DCHALMERS%2C%20CDS%29%20PARTS%20MANUALS is this any help? B:-) Dnoym
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Posted By: Vonholt
Date 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. |
Posted By: Vonholt
Date 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 |
Posted By: Vonholt
Date 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 |
Posted By: Dnoym N. S. Can.
Date Posted: 14 Jul 2019 at 2:26pm
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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:-) Dnoymps you can try Minnpar for the parts
https://www.minnpar.com/" rel="nofollow"> 
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