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Allis Chalmers Discussion Forum
Show Parts for Model:

Re: Ac 7000 engin oil to high on stick

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Gordie

09-17-2013 17:39:35
108.68.137.8



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I've replaced the drive shaft seal on the old pump with no improvement. I took pump in to fuel pump shop and they tore it down and found no problem with it. It was reaching its limit of use so I exchanged it for a new remanufactured one. Still getting fuel in oil. It cant be hytrans oil because not losing oil in power shift- hydraulic system oil level sight glasses. I have to be overlooking something! been dealing with this for a couple years. Having to change the oil after every couple hours of use gets expensive.

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old

09-17-2013 17:44:06
209.86.226.61



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 Re: Ac 7000 engin oil to high on stick in reply to Gordie, 09-17-2013 17:39:35  
Real easy to damage the seal when putting the pump back on guess how I how. Took me 3 tries to get the one back on the XT190 I had and that was with the special tool made for doing that



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Gordie

09-17-2013 18:08:50
108.68.137.8



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 Re: Ac 7000 engin oil to high on stick in reply to old, 09-17-2013 17:44:06  
If thats the only place fuel can enter, guess its worth takeing out again and check. Thanks!



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Gordie

10-24-2013 09:38:52
172.5.47.52



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 Re: Ac 7000 engin oil to high on stick in reply to Gordie, 09-17-2013 18:08:50  
Problem solved!! I removed injectors to have them tested. They were all good. Did compression test, found good compression on all but #1. #1 piston compression would start at about 200 pounds and decrease with every stroke. Also realized that piston was extracting air twice, to every one of the other pistons. That alone told me something was wrong with the valves. Removed valve cover to find #1 had a broken push rod and the other was off its rocker. Fuel was being injected and the compression of piston was blowing it down into crank case. There was no evidence of blow by because that piston was not firing. I replaced the push rods with new ones and put tractor back together. All is good with the world. Simple fix! Just wish Id of took the rocker cover off along time ago. Thank you to everyone who has offered advice to this issue!!!

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Gordie

09-17-2013 19:36:48
108.68.137.8



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 Re: Ac 7000 engin oil to high on stick in reply to Gordie, 09-17-2013 18:08:50  

Figured that was not a possible cause because the pump shop instaled the drive shaft seals. All I had to do was bolt it back in. I know they can be tricky because just put new pump on my jd 2510 and had to install seals and shaft on that one.



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old

09-17-2013 20:41:52
209.86.226.60



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 Re: Ac 7000 engin oil to high on stick in reply to Gordie, 09-17-2013 19:36:48  
The problem is that there are parts if the shaft that have sharp parts that in turn damage the seal when you install the pump on the shaft.



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