AC 160 Hydraulic problem

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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?

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magneticanomaly Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 Sep 2010 Location: west virginia Points: 5	Post Options Post Reply Quote magneticanomaly Report Post Thanks(0) Quote Reply Topic: AC 160 Hydraulic problem Posted: 21 Sep 2010 at 10:06am
	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?

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TomSEOH Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 13 Sep 2009 Location: SE Ohio Points: 170	Post Options Post Reply Quote TomSEOH Report Post Thanks(0) Quote Reply 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 ?

magneticanomaly Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 Sep 2010 Location: west virginia Points: 5	Post Options Post Reply Quote magneticanomaly Report Post Thanks(0) Quote Reply Posted: 21 Sep 2010 at 9:34pm
	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 ??

TomSEOH Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 13 Sep 2009 Location: SE Ohio Points: 170	Post Options Post Reply Quote TomSEOH Report Post Thanks(0) Quote Reply 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

magneticanomaly Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 Sep 2010 Location: west virginia Points: 5	Post Options Post Reply Quote magneticanomaly Report Post Thanks(0) Quote Reply Posted: 23 Sep 2010 at 9:52pm
	Does anyone know it this is a vane or gear type pump? Rebuildable? Any non-dealer sources or replacement? Thanks for replies!

Eric NY Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 11 Sep 2009 Location: Perry, NY Points: 59	Post Options Post Reply Quote Eric NY Report Post Thanks(0) Quote Reply 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

maytag Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 May 2010 Location: lower alabama Points: 19	Post Options Post Reply Quote maytag Report Post Thanks(0) Quote Reply Posted: 24 Sep 2010 at 8:18am
	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

magneticanomaly Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 Sep 2010 Location: west virginia Points: 5	Post Options Post Reply Quote magneticanomaly Report Post Thanks(0) Quote Reply Posted: 24 Sep 2010 at 9:38am
	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)