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HagerAC 
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Location: SE MN
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 Topic: Ambac 100 pump
Posted: 02 Nov 2018 at 8:29pm |
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So today the injection pump died in my 8070. Just wondering if it's a common thing because I would have never guessed it would just up and quit like it did. Anybody else have this happen? Tractor has 4500 hours on it and the pump was rebuilt once when the previous owner had it. Just curious
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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Brad in WA
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Joined: 29 Sep 2009
Location: Lynden,WA
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Posted: 03 Nov 2018 at 8:54am |
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Yes it's way too common, I've replaced them in both of my 8070's. AC using Ambac pumps is one of the reasons they aren't in business any more, total POS.
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HagerAC
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Posted: 03 Nov 2018 at 9:11am |
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I always thought if this pump is in need of a rebuild I would like to put an a series pump on it like many have done. Well since it died and we're trying to finish up harvest that's not gonna happen. I will have a reman from ambac in my hands on Monday for $1400. Yippee!!
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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8070220
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Location: Red bud il
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Posted: 03 Nov 2018 at 9:18am |
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Had a good rebuild one here for 750 if any one else need one I have some dm4 7060 and I got some db like the 180 190 .and I got inj here to for them .
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 03 Nov 2018 at 11:22am |
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Seems odd that it just quit without symptoms but,I don't know anything about them to say.The one on my 8070 had no govenor action below 1500 and wouldn't start hot. Easy to kill and then there you set. Learned to carry a jug of water to aid the hot start.LOL
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Brad in WA
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Posted: 03 Nov 2018 at 1:56pm |
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They don't have govenor response at ANY rpm.
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Ron(AB)
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Joined: 27 Dec 2009
Location: Alberta
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Posted: 03 Nov 2018 at 2:17pm |
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It seems the 8070 is the worst with that pump. I have a 8050 which is slightly better.
Combines are less noticeable because they're always wide open...
Anyone have some pics of their conversions?
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DougG
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Posted: 03 Nov 2018 at 2:32pm |
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Tyler Peterson has put A pumps on these, he,s got it going on with those !
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HagerAC
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Posted: 03 Nov 2018 at 6:45pm |
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Well I got lucky. I was getting ready to pull the pump this afternoon and I decided to pull the top cover off just to take a peek in there. It just so happened a cotter pin fell out where the governor control arm attaches and it was wedged against the side of the pump and it ended up shutting the tractor down. Much happier than I was yesterday.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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JC-WI
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Posted: 03 Nov 2018 at 7:08pm |
Glad to hear something simple happened...
Did you quick cancel of the other one? 
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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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HagerAC
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Posted: 03 Nov 2018 at 7:16pm |
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I'll have to call pump shop on Monday. My guess is I might have to pay to ship it back.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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SteveM C/IL
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Posted: 03 Nov 2018 at 10:55pm |
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Now you'll have time to get parts together to install an A pump for the future
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injpumpEd
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Posted: 04 Nov 2018 at 9:50am |
 HagerAC wrote:
Well I got lucky. I was getting ready to pull the pump this afternoon and I decided to pull the top cover off just to take a peek in there. It just so happened a cotter pin fell out where the governor control arm attaches and it was wedged against the side of the pump and it ended up shutting the tractor down. Much happier than I was yesterday. |
This seems to happen more often on ones that have had to tighten up the spring to help get the annoying flutter out of the exhaust. Some shops tighten that up alot just to be proactive, but that is one thing that leads to the lazy governing, and ends up wearing the cotter pin off. PS tractor?
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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!
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HagerAC
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Posted: 04 Nov 2018 at 7:43pm |
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Yes indeed, exactly ed. I have to go in there and tighten that nut up periodically to keep the flutter out of it. Can definitely tell when you get it too tight as well.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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RelianceWorks
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Posted: 05 Nov 2018 at 11:24am |
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we offer a complete kit to switch it to an A pump if you like
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Ron(AB)
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Posted: 05 Nov 2018 at 12:43pm |
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What's an "A" pump for those of us that don't know?
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SteveM C/IL
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Posted: 05 Nov 2018 at 1:29pm |
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Bosch A series.Inline pump found on like 4430 deere. Not the BIG "P" pump but big enough....If I had (another) 8000 with the Ambac,when it came pump time I would spend my money with Reliance since they have already done the "hard" stuff.
Edited by SteveM C/IL - 05 Nov 2018 at 1:32pm
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Ron(AB)
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Posted: 05 Nov 2018 at 5:06pm |
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Thanks, Steve.
Good to know!
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HagerAC
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Posted: 05 Nov 2018 at 9:02pm |
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While we're on the subject of this pump, is there any way to get the governor to be a little more responsive? I've been reading a little online about the cam and the droop screw.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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SteveM C/IL
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Posted: 05 Nov 2018 at 9:34pm |
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Ed will know but I was under impression there is a lot of adjusting to do on these to make them right and a test stand is the only way to get there as well as knowing yer stuff. I have been wrong before.
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Tenn allis
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Posted: 06 Nov 2018 at 5:27am |
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I have an 8070 it seems really lazy with the throttle response. I also have some a pumps what is involved with the conversion any idea of cost . Can this be done at a reasonable cost
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HagerAC
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Posted: 06 Nov 2018 at 7:31am |
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Well hopefully Ed will chime in here again on this post. I'd just like this thing to have a little better throttle response and governor response when a bigger load is on. I've driven 7060s that pull like a freight train at most any rpm, but the 8000 series seem to have to be wound tight to keep pulling.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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injpumpEd
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Posted: 06 Nov 2018 at 7:34am |
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part of the lazy governor response problem on M100 pumps comes from having to tighten the friction spring on the governor rod to keep the flutter out.
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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!
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HagerAC
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Posted: 06 Nov 2018 at 7:36am |
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I understand that ed, that's why I'm real cautious and only tighten it enough to take the flutter out. Would I be ok if I backed to droop screw out a few turns?
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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injpumpEd
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Posted: 06 Nov 2018 at 8:54am |
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droop screw can be taken out if you want. The latest revision of 8070 spec calls for removal of the droop screw.
Edited by injpumpEd - 06 Nov 2018 at 8:55am
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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!
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HagerAC
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Posted: 06 Nov 2018 at 9:49am |
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Ok ed, I appreciate the insight. Thanks much
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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injpumpEd
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Posted: 06 Nov 2018 at 10:23am |
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The last revision for all the AC tractor M100 pumps called for different governor springs and shimming specs to correct the fluttering issue, without having to tighten the spring so much!
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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!
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SteveM C/IL
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Posted: 06 Nov 2018 at 11:25am |
Tenn allis wrote:
I have an 8070 it seems really lazy with the throttle response. I also have some a pumps what is involved with the conversion any idea of cost . Can this be done at a reasonable cost |
send Reliance PM
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HagerAC
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Posted: 06 Nov 2018 at 4:57pm |
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Ed, wondering if it would be possible to pull the governor housing of the pump off and send it to you this winter and have you go thru and set it up to the latest specs. Or would you need the whole pump. Was thinking if I could leave pump on tractor and just send governor section to you. Thanks
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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injpumpEd
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Posted: 06 Nov 2018 at 5:10pm |
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whole pump
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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!
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