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Re: Re: Leaking O-ring on Backhoe Control for Case 580SE
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Posted by GEO on January 06, 2001 at 07:29:08 from (63.104.132.106):
In Reply to: Re: Leaking O-ring on Backhoe Control for Case 580SE posted by Got the same problem on a 79 MF TLB (shep) on January 05, 2001 at 20:08:28:
Oring seals are ready available from sereral sources. NAPA auto parts store or most any tractor and industrial parts sources. Simply measure the diameter of the spools that you have and then go to town and inquire about Orings with the same ID as your spool measure OD. Most Orings for hydraulic valve bodies are usually 3/32 or 1/8 cross section in size. Orings are listed in dash sizes. For example, if you have a 7/8 spool the dash number for a Oring with a cross section of 1/8 is 212. If the spool diameter is 1", the dash number will be 214. As for replacing Orings. Some of the Case units will have a screw on spring cover on the bottom of the valve that can be removed and the spools can then slide out the bottom. The Oring on the bottom will probably come out with the spool. The Oring on the top will be in a groove. I would remove the entire valve body from the hoe and not only replace all of the Orings on the spools but would also replace all the Orings and B/Us on the safety valves as well.
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