Allis Chalmers G hydraulic issue
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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=47342
Printed Date: 29 Aug 2025 at 2:46pm
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Topic: Allis Chalmers G hydraulic issue
Posted By: ccaissie
Subject: Allis Chalmers G hydraulic issue
Date Posted: 15 Mar 2012 at 2:39pm
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Hi: Diagnosing a 1953 G, with weak hydraulic function, i.e. raises only 1" slowly. Pump is not noisy, but am not sure about oil level....is it the transmission case that's used as the common reservoir? I have adjusted the knob on the front side of the top assembly, assuming it's the pressure relief setting...no changes. So, is this a valve issue, a pressure setting, a suction/supply issue or is the pump just shot? Thanks for any help on this, Colin |
Replies:
Posted By: Ted in NE-OH
Date Posted: 15 Mar 2012 at 2:43pm
The hydraulic reservoir is the transmission case, so check level of transmission fluid.
------------- CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914 |
Posted By: ccaissie
Date Posted: 15 Mar 2012 at 3:59pm
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Since I couldn't find a separate reservoir, I assumed it was common, like the old crawlers using 20-30wt. I've heard that using 90wt gear oil can cause a problem, but it seemed to be thin oil, like motor oil. I've also heard that since the pump actually works, it is best to check the suction tube, ports, relief valve etc. The tractor will be at my shop next week, so looking forward to a simple fix, but if you've got further hints, I'd like to hear. Thanks, C |
Posted By: JoeM(GA)
Date Posted: 15 Mar 2012 at 6:01pm
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C, check your email, sent you some reading Joe ------------- Allis Express North Georgia 41 WC,48 UC Cane,7-G's, Ford 345C TLB |
Posted By: ccaissie
Date Posted: 16 Mar 2012 at 11:22am
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Thank you very much! C |