AC 160 Hydraulic problem
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=18537
Printed Date: 25 Dec 2024 at 8:34pm
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Topic: AC 160 Hydraulic problem
Posted By: magneticanomaly
Subject: AC 160 Hydraulic problem
Date Posted: 21 Sep 2010 at 10:06am
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I am buying an AC 160 tractor,with the 3 cyl Perkins engine, and the hydraulic pump driven off accessory drive on right side of engine. The hydraulics do not work until I take plug out of pump discharge, and wait until it picks up oil. I know when this has happened because I get a bath in hydraulic oil. Put plug back in , and everything works until I shut the tractor off. Former owner supposedly had all the suction piping apart, and neighbor says this problem is common on this model. Does anybody have a fix? |
Replies:
Posted By: TomSEOH
Date Posted: 21 Sep 2010 at 10:59am
| Make sure that the screen on the suction side is clean. It's located in the square box on top of tranny, sometimes hard to get out,may have to give it a gentle pry. Just wondering, that 160 doesn't have a piece of railroad iron for a bumper does it ? |
Posted By: magneticanomaly
Date Posted: 21 Sep 2010 at 9:34pm
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No railroad iron bumper..supposedly was bought new in WV. I am told that the late owner had that suction screen out, and found no problem, and I knew him to be a smart guy and a fair mechanic. There is not much betwen the gearcase and the pump but that screen, gasket under cover, gasket at tube elbow, a short piece of hose, and another small gasket at the pump inlet. I won't get to take it apart until the estate is settled. For now i am just trying to gather information. Do you happen to know what the cylindrical casting is that the pressure line form the pump goes into, on its way to the control valves? Could be a high=pressure filter, or an accumulator, or ?? |
Posted By: TomSEOH
Date Posted: 22 Sep 2010 at 2:22pm
| There is a filter in there somewhere, mine had a screw on i believe ,but some had canister types as well. I sold mine up near Parkersburg and i had seen one advertised up that way. Great little tractors, sometimes hard to track down parts. The hyd. pump is an aluminum type and they do go bad such as you say. I gave about $300. for the one i bought, may be higher now, good luck, Tom |
Posted By: magneticanomaly
Date Posted: 23 Sep 2010 at 9:52pm
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Does anyone know it this is a vane or gear type pump? Rebuildable? Any non-dealer sources or replacement? Thanks for replies! |
Posted By: Eric NY
Date Posted: 24 Sep 2010 at 5:57am
I had a similar problem with mine shortly after having the tractor split in two while replacing the rear main oil seal. Turned out to be losing it's prime because the clamps on the rubber hose connection on the supply line to the pump were not tight enough. I replaced them with good quality hose clamps and have never had a problem since. I guess an air leak anywhere on the suction line could cause it to lose prime. Eric NY
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Posted By: maytag
Date Posted: 24 Sep 2010 at 8:18am
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Shaft seal on the pump itself can be bad and cause this same problem.
For a band-aid you could tee in a manual valve on the high pressure side of the pump and divert air and oil both back to tank if you have a port to tie into. Sun Hydraulics also makes an "air bleed" valve for this application. If you go the manual valve, be sure and get one with a sufficient pressure rating. Hydraulic pumps don't function well as air compressors. HTH, Tom |
Posted By: magneticanomaly
Date Posted: 24 Sep 2010 at 9:38am
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As soon as I get the thing home, I'll certainly replace that little piece of hose in the suction line. Is it much of a job to get the pump off if i want to replace the pump shaft seal? Is it a standard metal-cased lip seal? Another concern with this tractor is that sometimes it will not go into gear, just grinds and grinds. I would be sure it was clutch dragging or bad pilot bearing, except sometimes it slips right in! What should I look for, there? Thanks very much to all for the warm welcome into the world of modern A-C! (I say, "modern", because my other 2 tractors are 1931 Farmall Regular that I use for everything, and 2 "hibernating" 1950 WD's) |