New-to-me Wd45 low rpm
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=208414
Printed Date: 04 Oct 2025 at 3:06pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: New-to-me Wd45 low rpm
Posted By: OldManLarry
Subject: New-to-me Wd45 low rpm
Date Posted: 04 Oct 2025 at 11:11am
Good morning gentlemen.
I’ve had a friends WD45 sitting about the farm for a bit. I’d like to put it to work. Starts generally well. New carb, supposedly rebuilt engine.
It fails to maintain rpm while running. Bogs under load from 4’ brush hog in medium grass.
I adjusted the carb/governor arm linkage by bending. It was 3/16” off. While tractor is off, linkage sits just into the gov arm hole with carb at max input. Gov arm on hand throttle/gov body side sits fully engaged at max rpm. After starting, gov arm reduces rpm at carb, hand throttle does not increase rpm.
Can someone post pictures of the throttle side spring linkage, and the carb-side spring linkage? I believe they’re incorrectly installed.
Hand throttle is fully engaged about 3/4 of the way down, but gov arm on gov side is fully engaged for max throttle.
Do you gentleman know what may be the culprit here? Thank you
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Replies:
Posted By: OldManLarry
Date Posted: 04 Oct 2025 at 11:13am
After shutting down tractor, carb and gov arm return to max throttle position.
There’s a large dent, watermelon could sit down in it, in the underside of the oil pan. I see oil lines running to the governor. Maybe there’s a correlation there?
Thank you sirs, I really appreciate your time and knowledge
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