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Allis Chalmers Discussion Forum

Any ALLIS Mech's

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12-14-2007 13:23:04

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I have a D-19 with the same problem as Plowjock5 has with his 185. Hyd. come and go. I wrote in and got a response some time ago telling me it was sucking air. OK Where!! Point me in some direction. Please!! These are a internal piston pump.

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Gordon Chance

12-15-2007 08:31:07

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 Re: Any ALLIS Mech's in reply to Mixman, 12-14-2007 13:23:04  
This sounds like a similar problem that I had with a customer pulling a 7000 Deere planter behind his D19. The problem that he was having was that when he would raise and lower the planter then try to raise it again it would lose the prime to the pump. What was happening was that when he lowered the planter, it dropped faster that the low volume hydraulic pump could pump enough oil to fill the cylinder which left a charge of air in the rod side of the cylinder. When he started to raise the planter the next time, the air that was in the cylinder would be pushed back into the reservoir next to the suction side of the pump and would cause the pump to lose its prime. The solution was to move the return line from the bottom cover and putting it in at a higher plug on the side of the housing. I would try moving the return line higher and seeif this doesn't solve your problem. Good luck and let us know what happens. Gordon

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12-15-2007 09:40:03

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 Re: Any ALLIS Mech's in reply to Gordon Chance, 12-15-2007 08:31:07  
Gordon. You may have it. What happens is I try to lift the loader and it will raise and quit. The pump is silent as if it weren't even there.

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Gordon Chance

12-15-2007 12:29:04

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 Re: Any ALLIS Mech's in reply to Mixman, 12-15-2007 09:40:03  
That is the same thing that was happening to the customers tractor.

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12-15-2007 04:21:29

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 Re: Any ALLIS Mech's in reply to Mixman, 12-14-2007 13:23:04  
Most likely a traction-booster linkage issue. Get a manual for the tractor, its got the step by step instructions.

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12-15-2007 06:17:34

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 Re: Any ALLIS Mech's in reply to DiyDave, 12-15-2007 04:21:29  
I have an I&T manual. I guess you would have to see (hear) what this is doing. definitely not a linkage issue!!!!!! You can hear the pump when it is working and when it isn't.

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