Overheated my tractor
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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=137979
Printed Date: 26 Dec 2025 at 5:30pm
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Topic: Overheated my tractor
Posted By: Mule
Subject: Overheated my tractor
Date Posted: 01 May 2017 at 2:05pm
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I was cutting tall cereal rye yesterday and overheated my AC 6140 tractor. I just bought it last year so don't yet know all the ins and outs of it. When it was running I could feel it kind of lose power a bit and then the power would come back. It finally just died. I didn't think about the radiator until that point and then realized it was clogged up. I let it cool overnight and checked it this morning. It still has full coolant and the oil looks fine. It turns over but won't start. I'm hoping someone with more experience can point me in the right direction of what to do or look for next. Does it have any kind of overtemp mechanism that would kill the fuel to it? Anything in particular I should try to get it going again?
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Replies:
Posted By: Leon n/c AR.
Date Posted: 01 May 2017 at 3:49pm
| How hot did it get on temp gauge? Does it crank over normal-faster-slower? Sounds like possible fuel filter clogged or fuel pump bad. Does it smoke out exhaust when cranking over? Leon |
Posted By: shameless dude
Date Posted: 01 May 2017 at 5:28pm
| sounds like you lost your pump to me... |
Posted By: Mule
Date Posted: 01 May 2017 at 7:07pm
Actually I'm not sure that gauge works. If it does I didn't notice it. Anyway I went and pulled the filter off and it's pretty corroded and needs to be replaced for sure. I opened up the valve coming off the fuel tank and fuel was barely dripping out of the line going into the filter housing. The banjo bolt was almost completely blocked. Got it cleaned up and put back together. Cracked the outlet side of the filter housing to let air out and fill up with diesel. Cranked it and I got it to start and run for about 3 seconds before it died again. That's progress from before. I thought maybe the lines needed to be bled so I cracked them and cranked it and then tightened them back up. I'm getting some fuel there but it won't start. Thinking maybe the filter is restricting me. Going to replace the filter and have another go. So now I'm thinking it didn't overheat at all and it just ran out of fuel. That would make sense to me based on how it would seem to lose power and then come back to normal. If I do need a pump where would be some good places to look for one?
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Leon n/c AR. wrote:Posted By: Mule
Date Posted: 02 May 2017 at 8:59pm
| I replaced the fuel filter but it won't start. No smoke coming out of the exhaust and it's not firing. I cracked the lines again at the injectors and cranked it. I have some fuel coming out all three although I'm not sure if it's coming with enough pressure from the pump? Maybe I lost my injector pump? I went ahead and bought a new tractor today. At this point I just want to get this one running again so I can sell it. Not sure if it would be worth the cost if the injection pump really is bad. I found one rebuilt for over $1,100. Not worth it to me at that cost. Is there a cheaper option to either send it to a shop for rebuild or rebuild it myself? Anything I can do to confirm whether it is good or bad before buying another one? |
Posted By: steve(ill)
Date Posted: 02 May 2017 at 9:12pm
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there should be some type of little primer pump.. a button that you push, or a small piston that you pump up and down to buildup pressure inside the fuel pump ???
My son has a Bobcat that always lost prime.. Ended up buying a small electric pump at Auto Zone and put between the fuel tank and the injection pump... keeps 20 psi pressure on the injection pump and solved his priming problem........ you can tap into the line from the tank, then turn it on and squirt out into a bucket to guarantee the new electric pump is pulling fuel thru the hose up to it and then tie into the injection pump input. ------------- Like them all, but love the "B"s. |
Posted By: Mule
Date Posted: 02 May 2017 at 10:23pm
| Thanks for the response Steve. Would that primer be built in to the injector pump itself? I know from the fuel tank it just goes straight to the filter housing and then straight to the injector pump. |
Posted By: AC720Man
Date Posted: 03 May 2017 at 8:26pm
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I agree, sounds like a fuel issue. Sounds like it surged at times when it was running and then died. First off, really important that all your gauges work so you can foresee an issue before it becomes critical but I am sure you are aware of that. Of course flow from the tank thru the bowl is the first to check. Work from the tank forward. Make sure your getting plenty of fuel thru the bowl and that it is clean.I am not familiar with that model but it is critical the fuel system not have any air in it so your on the right track. Normally there is a primer between the fuel tank and filter. May not be the case on the 6140. Once you get good flow to the filter, crack open the feeder to the pump until you have good flow to the pump. Then, crack your injectors and have someone turn it over until no air bubbles appear and then tighten the injector line. Then move to the next injector and repeat. How many hours are on the tractor? My dads 6060 only had 1900 on it but was bought new in 1981 when it started surging and blowing white smoke at times. Lost some power also. So had the pump pulled and sure enough o-rings had gotten hard, so we had it rebuilt. 4 cylinder and was roughly $500. Starts and runs like a champ. What I am saying is hours dont always dictate a rebuild, in his case the tractor was around 30 years old, age and not running very often probably played the big factor. If the tractor is in good shape otherwise, a fuel pump rebuild would be a relatively inexpensive repair and she may run better than ever and then you just might not wanna sell her. Hopefully Ed will see the post and chime in. He is an expert at fuel delivery since he does it for a living. Will also rebuild your pump and is extremely good at his job. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: lowell66dart
Date Posted: 03 May 2017 at 10:13pm
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I don't think a 6140 has a primer pump. As stated above, work from the tank towards the injection pump. ------------- AC 6080 (8030,7060,200,175,D-17HC, 6040,160,6140 all gone) Farmall 1066 & 656 Hi-Clear (for sale), White 2-62 High Clearance, JD 4255 Hi Clear. |
Posted By: SteveM C/IL
Date Posted: 03 May 2017 at 10:24pm
| Parts books shows it to be a CAV pump.Don't know how pricey to rebuild but see new on ebay for under $600.Don't see you tractor listed but you could contact the sellers to see if they had yours.Does not appear to be a primer in the parts book,just loosen bleeder on filter til it runs out then crank.LOL! |
Posted By: Mule
Date Posted: 03 May 2017 at 10:49pm
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There is a video on youtube by an aussie fellow that walks through doing a rebuild on a CAV pump. It doesn't look too terribly bad but more than I would want to delve into. Universal rebuild kit is less than $50 I think. I'm still not convinced mine is bad. It didn't smoke at all. Was burning very clean. When it was dropping off on power at one point I gave it a little bit more throttle and it blew a little black smoke and cleared up and the power came back. In that video it looked like he cracked some bolts on the side of the pump to help bleed the air out. I'm going to try that. If no luck with that I think I will try the inline electric pump. Beyond that I'll look at a rebuild if I can find someone to do it. I already have a little yanmar for getting in tight spaces and just bought a new Kubota so my plan is to fix this one and sell it if possible. Don't recall how many hours on it but I got it from the grandson of the original owner. I think it had sat for a while when I bought it. The first day I had it the radiator blew a leak. Got it rodded and it's held up since then. Changed the oil and coolant but unfortunately I hadn't yet done the fuel filter until this problem. I suspect once I get the fuel flow cleared up and injector pump primed it will work again. I hope...
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