Off color but need help.
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=31076
Printed Date: 10 Mar 2025 at 2:43am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Off color but need help.
Posted By: R.W
Subject: Off color but need help.
Date Posted: 20 May 2011 at 9:09pm
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Our Farmall super mta has been acting up for awile. This in what its doing, most of the time it starts up good but sometimes it will start to fire and then it will stall you could crank it for the rest of the day but it wont fire again. But if you you pull it with another tractor it will fire it right up. It gets gas because you can see it blowing out of the exhust. Its a pain if there is no other tractor around to help out so this needs fixed.
Any ideas? ------------- In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D |
Replies:
Posted By: AC WD45
Date Posted: 20 May 2011 at 9:12pm
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Gas mixture to rich, or lay off the choke. sounds like it's flooding, or not getting spark ------------- German Shepherd dad 1957 Allis Chalmers WD45 #WD234847 1951 Allis Chalmers WD #WD88193 |
Posted By: R.W
Date Posted: 20 May 2011 at 9:16pm
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This tractor never gets choked because, well it dosent need it. ------------- In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D |
Posted By: AC WD45
Date Posted: 20 May 2011 at 9:19pm
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sounds like the mixture is too rich then. pulling it gets it to roll over fast enough to clear i out and fire. could be a number of things though. need to know what you have and haven't checked? ------------- German Shepherd dad 1957 Allis Chalmers WD45 #WD234847 1951 Allis Chalmers WD #WD88193 |
Posted By: Troy
Date Posted: 20 May 2011 at 9:20pm
| sounds like maybe your starter has to much draw, hook a hot wire up to the coil from battery and see if starts bypass the resistor, this will give full 12 volts to coil. if works your starter is drawing to much current away from ignition |
Posted By: AC WD45
Date Posted: 20 May 2011 at 9:23pm
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Anther possibility I didn't think of. Like i said, we need to know what you have and haven't tried, or we'll get no where ------------- German Shepherd dad 1957 Allis Chalmers WD45 #WD234847 1951 Allis Chalmers WD #WD88193 |
Posted By: 427435
Date Posted: 20 May 2011 at 9:43pm
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I wonder if the coil is getting tired. When you're pulling it, the battery voltage is higher than when it's also turning the starter, so it starts. I suppose your battery could be getting tired also. ------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |
Posted By: Dick L
Date Posted: 21 May 2011 at 5:35am
| A battery on the edge of going bad will do this also. You have to eliminate one thing at a time until you find the gremlin. |
Posted By: R.W
Date Posted: 21 May 2011 at 7:59am
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We have tryed a few different batterys, but it still did the same thing. ------------- In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D |
Posted By: Rogers
Date Posted: 21 May 2011 at 8:25am
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I would consider changing the coil since you have already tried several batteries. Also when was the last time it got new plugs and points? Since you don't believe it is a problem caused by a rich gas mixture or flooding I would lean toward changing the coil and installing new points. This is cheaper than looking at a problem with the starter. It could be there, but I'd look somewhere else first. ------------- Think for yourself and be your own expert. Be willing to change your mind; however, willingness to change your mind doesn’t mean that you will. Blindly following any path is the pinnacle of insanity. |
Posted By: Brian Jasper co. Ia
Date Posted: 21 May 2011 at 8:42am
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It sounds just like my Oliver 60 used to. I converted to 12V. It would crank fine, but no start until the starter button was released. It would light right off every time. Turned out the battery had a bad cell. Cranking voltage was dropping to around 7 volts. Plenty to crank the engine but not enough to spark under compression. You might put a volt meter on the hot side of the coil and see what it does when it won't start. Less than 9.5 volts usually won't fire a 12v coil under compression. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: R.W
Date Posted: 21 May 2011 at 8:47am
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Well its got new points and the plugs look great and the starter was rebuilt about a year ago. Im thinking it might be the coil going bad... ------------- In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D |
Posted By: Brian Jasper co. Ia
Date Posted: 21 May 2011 at 8:57am
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It could be a bad coil. Do a little detective work first so you'll know and only make 1 trip to the parts store. If you have a lack of voltage to the coil, it will look like the coil was at fault. If you find low voltage, do what's called a "voltage drop" test. Its simple to do. All you need is a digital meter. Simply parallel the circuit with the meter. Bad connections cause resistance and resistance can use some of the available voltage. Get enough unwanted resistance, and the circuit won't work. You can test the whole circuit first. If you find more than 1/2 volt drop, test each part and section of wire individually. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Rogers
Date Posted: 21 May 2011 at 3:13pm
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Brian is right bad connections really hurt an electrical system. Make sure all the connections are good. You have good points, plugs and battery. You might want to check the rotary button and cap although I don't think they would cause your problem. If the connections are good and you still have problems I would replace the coil if it were me. ------------- Think for yourself and be your own expert. Be willing to change your mind; however, willingness to change your mind doesn’t mean that you will. Blindly following any path is the pinnacle of insanity. |
Posted By: R.W
Date Posted: 28 May 2011 at 8:29am
Well I think I got it, I had to fix a couple wires and put in a different battery and it starts up good now! Thanks g uys! ------------- In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D |