WD Allis running rough and rich!
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=173667
Printed Date: 21 Aug 2025 at 7:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WD Allis running rough and rich!
Posted By: danr
Subject: WD Allis running rough and rich!
Date Posted: 19 Aug 2020 at 8:15pm
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WD Allis Chalmers running rough: Compression on cylinders 1 through 4 is 100, 100, 70, and 100 psi respectively. Plugs cleaned (before and after compression check and they were very sooty both times telling me that it is running extremely rich), plug gap set at .30, points gap set at .20. (Fuel system cleaned and fuel flowing well with new gasoline). By switching carburetor and making adjustments to it and by switching coil it didn't make any difference. Adjusted timing to no avail. Governor working properly. Tractor just seems to spit and sputter but stays running. Anyone else had similar issue? I took audio/video of it running but I am unable to attach it. I can email or text the video if need be. |
Replies:
Posted By: Boss Man
Date Posted: 19 Aug 2020 at 9:23pm
| How does it run with the air cleaner disconnected? |
Posted By: DSeries4
Date Posted: 19 Aug 2020 at 9:30pm
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As mentioned above, unhook the air hose coming from the air cleaner - could be plugged. Based on what you have indicated, adjusting the carb should help smooth things out. The 3rd cylinder having 70 lbs compression is not a good sign. There should not be any more than a 10 percent variance in compression numbers. Could be a knock in the engine? ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: danr
Date Posted: 20 Aug 2020 at 5:34am
| Sorry. I forgot to mention the hose to air cleaner was renoved from the beginning of trouble shooting. |
Posted By: danr
Date Posted: 20 Aug 2020 at 5:35am
| Choke was operating correctly also. |
Posted By: danr
Date Posted: 20 Aug 2020 at 5:37am
| No knocking what so ever. Just the cutting out syndrome (spit/sputter) while running. |
Posted By: danr
Date Posted: 20 Aug 2020 at 5:43am
| I tried adjusting each carb (when assembled to engine) while tractor was running and spitting/sputtering. Didn't make a difference. |
Posted By: allisorange
Date Posted: 20 Aug 2020 at 6:44am
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Maybe an intake leak? J Carlson
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Posted By: danr
Date Posted: 20 Aug 2020 at 7:51am
| I apologize.... compression is 100, 100, 90, 100. |
Posted By: Dan Hauter
Date Posted: 20 Aug 2020 at 4:36pm
| I have a WD that is acting just like this one. Haven't figured it out yet. Took it to a local mechanic who replaced a whole lot of little parts like plugs, points, etc. and timed it. Still runs rough. |
Posted By: Boss Man
Date Posted: 20 Aug 2020 at 5:17pm
| What does the cap and rotor look like? Look real close at the cap to see if there's any little streaks. The streaks would be carbon tracks and cause the spark to jump to where its not supposed to be. |
Posted By: danr
Date Posted: 20 Aug 2020 at 5:51pm
| Following Dan Hauter. Interested in what his mechanic finds! |
Posted By: MACK
Date Posted: 20 Aug 2020 at 9:08pm
| Been down that road before . Put a MSD 6A ING. system on it. Problem solved. MACK |
Posted By: Brian Jasper co. Ia
Date Posted: 20 Aug 2020 at 9:23pm
------------- "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 |
Dan Hauter wrote:Posted By: CTuckerNWIL
Date Posted: 21 Aug 2020 at 9:12am
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Maybe you should double check the plug wires, to be sure the firing order is right. I have 'fixed' a couple tractors that wanted to sputter and spit, after somebody did a 'tune up' on them. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Ken McGregor
Date Posted: 21 Aug 2020 at 9:26am
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It may not always work but my WD45 was acting like that and I had replaced plugs, points, condenser, wires, etc. along with the carb tuneup and setting and nothing was working well. I finally replaced the regular plugs with NKG plugs and the problem not only went away but the tractor is firing better than I have had it work for several years. The plug number escapes me as I type but it is the standard NKG replacement for the 295 plug that AC uses. I wish I had done that sooner as I had replaced plugs several times previously but however....... Sometime the expenditure of just a little bit more money in the right place pays off. No guarantees but it sure worked for me!! regards, Ken McGregor
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Posted By: danr
Date Posted: 21 Aug 2020 at 12:33pm
Triple cheeked them! 1243 |
Posted By: DrAllis
Date Posted: 21 Aug 2020 at 12:37pm
| Clockwise rotation looking down on the rotor ? |
Posted By: danr
Date Posted: 21 Aug 2020 at 2:32pm
Yes |
Posted By: danr
Date Posted: 25 Aug 2020 at 8:57am
| Today I swapped out the distributor, points and condenser from another running WD I have. Started tractor up and it runs fine. When I get some "free" free time I will play around swapping rhe old points, old condenser and old distributor each separately and determine which of those three units was the culprit for making the WD spit, sputter and run rough. Thank you all for your suggestions and help in trying to resolve this matter. You are all a wealth of information and help. |
Posted By: Steve in NJ
Date Posted: 25 Aug 2020 at 9:06am
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Chuck the Distributor you pulled out in a vise. Pop the cap off, grab the rotor and the bottom drive gear and see if it wobbles. If it does, there's your culprit. Brian nailed it if that's the case. I offer Distributor rebuilding or exchange if that's the problem if interested. Hope you find the culprit..... Steve@B&B bb-customcircuits.com ------------- 39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife |
Posted By: DaveKamp
Date Posted: 25 Aug 2020 at 12:13pm
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+1 for Brian and Steve... the distributor shaft bushing is a common wear point. Send yours to Steve to refurb. ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |