200 Hyd pump
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=140565
Printed Date: 19 Aug 2025 at 11:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 200 Hyd pump
Posted By: LeakyBoot
Subject: 200 Hyd pump
Date Posted: 19 Jul 2017 at 4:27am
Replies:
Posted By: MACK
Date Posted: 19 Jul 2017 at 6:54am
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Don't know where or how you checked the pressure, but I would adjust relief valve before removing pump. MACK
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Posted By: LeakyBoot
Date Posted: 19 Jul 2017 at 11:12am
Posted By: SteveM C/IL
Date Posted: 19 Jul 2017 at 12:22pm
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Adjust it anyway....pump on my 220 had been run in need of wear plates/backup seals too long and fluid leaking by had eroded a passage where the backup seal sets and made it "unfixable".Pull yours apart and see what you have.Go from there.Double check system pressure after installing new/different pump.I had cranked my relief up for worn pump and forgot to change after new pump.Several hours use later it split the housing.
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Posted By: DrAllis
Date Posted: 19 Jul 2017 at 12:25pm
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Always re-seal the main relief valve first and do NOT change the adjustment screw. If pressure still low, adjust screw inward (and count the turns) to see what happens. If that doesn't work, return screw to original setting and go thru pump.
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Posted By: Joe(TX)
Date Posted: 19 Jul 2017 at 3:01pm
The gage on the baler is only the belt tension and depends on the relief valve setting of the baler. The tractor pressure should be checked at the remotes. The tractor relief valve is on the control valve and not the pump.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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