Loss of power B
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=132669
Printed Date: 06 Jun 2025 at 6:07pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Loss of power B
Posted By: ihscout
Subject: Loss of power B
Date Posted: 15 Dec 2016 at 6:30pm
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My 40 B all the sudden lost a lot of it's engine power yesterday. It sounded as though the exhaust system is clogged somehow. I pulled the intake / exhaust manifold and found a couple of cracks in it. Welded those and reassembled. No change. Any ideas as where to go from here? ------------- '40 AC B - My Pappy always told me "Use your head for something other than a tack hammer!" I did. It makes a great 16 pound sledge hammer. |
Replies:
Posted By: Ted in NE-OH
Date Posted: 15 Dec 2016 at 6:50pm
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Is it hitting on all 4 or you missing spark on 1 plug. Check for good fuel flow at carb. ------------- CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914 |
Posted By: Randy WI
Date Posted: 15 Dec 2016 at 7:03pm
| check your air filter may have a mouse nest or some other thing plugging it up. Randy |
Posted By: Bill Long
Date Posted: 15 Dec 2016 at 7:36pm
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I do not have all the particulars but usually when a tractor loses power under load my first suspect is - cheap, the condenser, more costly the Coil Can't have my favorite not running well. Let us know how it goes. Good Luck! Bill Long
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Posted By: ihscout
Date Posted: 15 Dec 2016 at 7:57pm
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It is hitting on all 4 cylinders and the air filter is clear. I just put a newly rebuilt magneto on it this summer and have very few hours on that. It doesn't reach the higher RPMs as it did a day ago. Would the governor have anything to do with it?
------------- '40 AC B - My Pappy always told me "Use your head for something other than a tack hammer!" I did. It makes a great 16 pound sledge hammer. |
Posted By: Eric B
Date Posted: 15 Dec 2016 at 8:30pm
You could disconnect the rod to the carburetor and manually throttle up on the carburetor linkage itself to see if that makes a difference. ------------- Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal! |
Would the governor have anything to do with it?
[/QUOTE wrote:Posted By: cpg
Date Posted: 16 Dec 2016 at 8:32am
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Could also check to see if your mag bolts came loose and the magneto rotated. If the timing adjustment you can do by rotating the mag gets off and retards the timing it will seem like its lugging or loaded at full throttle even when its not. |