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8070

Printed From: Unofficial Allis
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=41574
Printed Date: 02 May 2025 at 8:46am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 8070

Posted By: AC200Puller
Subject: 8070
Date Posted: 04 Dec 2011 at 3:15pm

Working on an 8070 and at pto speed the engine starts to chatter or shudder and puff smoke and it has me stumped! Remanned pump and injectors, new fuel line from tank to pump,all new filters,have had timing all over and it helps nothing,compression is ok,timing gears are tighter than alot I've seen. I would love to hear a cure for this or any ideas that you can think of . Thanks in advance ! Dave.

Replies:

Posted By: DrAllis
Date Posted: 04 Dec 2011 at 5:50pm

Start from the beginning. What did you originally have for a problem???? when was the reman injection pump installed???? how do you know the timing gears are "tighter than a lot I've seen"?? did you have the front cover off??? It sounds like the typical "goosey governor" on an AmBach pump but they usually do it at a little slower speeds and don't do it under a load at all.

Posted By: AC200Puller
Date Posted: 04 Dec 2011 at 6:33pm

Well I got into this one in the middle I think the guy told me that he had the pump redone and it didnt run right . So I took it off and sent it in again and same thing then I talked to them and they said bring it back and they traded me again and still the same. I was just going off of the backlash at the pump drive to see if it was way loose and not bad. The guy runs a big square baler with it and right at the speed he needs to run it is terrible! I just took it for another drive and at2100 it starts and at 2500 it comes out of it it is so bad it is shaking everything lose under the hood! It smokes in puffs just driving down the road I have never had this problem some of them will do it a little but nothing like this one. I am open to anything I am running out of options. Thanks for your interest.

Posted By: injpumpEd
Date Posted: 04 Dec 2011 at 7:06pm

does it have adequate oil pressure? The model 100 pump needs oil pressure for the intravance.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

Posted By: DrAllis
Date Posted: 04 Dec 2011 at 7:09pm

This will make a mess, but maybe nail down what the problem is. Tractor in Park and Power Shift in 4th gear, remove the top cover on the injection pump. Takes a 7/16" socket to remove the four bolts.....probably better have all the bolts out of it but one?? Have someone sit in the seat and move the throttle up to the point it where does it's thing and remove the cover and see if the governor is quivering back and forth. If it is, stick your finger on it to stop it from jumping around and if that is the problem, you need to tighten down the tension spring on the governor linkage you're looking at until there is definite "drag" on the linkage. Many pump repair shops can't seem to get this adjustment correct on a test bench. There will be engine oil spraying out of the pump with the cover removed.

Posted By: AC200Puller
Date Posted: 04 Dec 2011 at 7:29pm

Thanks I will check this tomorow night and see. It sounds very reasonable. I will let you know what I come up with Thanks for Now !

Posted By: injpumpEd
Date Posted: 05 Dec 2011 at 10:14am

DR is correct! there was some sensitivity issues on AC, they even issued a bulletin, to re-shim the gov springs.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

Posted By: Kevin in WA
Date Posted: 05 Dec 2011 at 10:23am

Dr Allis is spot on , every reman 100 pump I have gotten has this adjustment set too loose.

Posted By: AC200Puller
Date Posted: 05 Dec 2011 at 4:40pm

Ok guys the govener is going nuts what do I tighten down is it the bolt that goes through the top of the fulcrum? God you guys are life savers! Thank you very much!

Posted By: DrAllis
Date Posted: 05 Dec 2011 at 4:58pm

Engine off.....open hand throttle up to just a tad above the idle position. The nut you are going to tighten up is on the top of that governor aparatus that is quivering. Takes a 7/16" open wrench. Usually the nut is so loose you can just see the coil spring underneath the nut. Nut/bolt is 90 degrees to the crankshaft. With your finger, operate the governor arm by pulling it rearwards towards the cab and then let go.....it should spring forward. Now, tighten this nut (and by tightening I mean counterclockwise from where you are standing) until when you pull back on the governor and let go, it just barely moves all the way back forward with things in the idle position. When I did it, I usually cleaned the threads with brake kleen and air dried it and dribbled some loctite on the threads and then quickly adjusted the nut in hopes the glue would keep it locked in place.

Posted By: AC200Puller
Date Posted: 05 Dec 2011 at 7:06pm

Thank You very much !!!!!! I got it and it runs great ! You are the best Thanks!