WD throttle setting and 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=188548
Printed Date: 17 Sep 2025 at 4:32pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WD throttle setting and RPM.
Posted By: exSW
Subject: WD throttle setting and RPM.
Date Posted: 30 May 2022 at 2:04pm
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I have a '52 WD barn find I've brought back to life over the last several months. Things have gone very well. But I'm in the final stretch with this tractor and I can't get consistent RPMs for a given throttle setting. Changes without pattern. The carb was rebuilt with the major rebuild kit. Parts washer,USC,bead blasted and USCed again before assembly. Throttle linkage has full range of motion. Linkage? Governor?Spring? I'm stumped. It does seem to be load related. I was jockeying a manure spreader around and it seemed to be worse. ------------- Learning AC...slowly |
Replies:
Posted By: Dakota Dave
Date Posted: 30 May 2022 at 2:13pm
| I followed the directions in the manual setting the linkage it did wonders for my throttle stability. The belcrank under the has tank usually has lost of wear and the spring is important. Dis onnet the rods and check for freedom of movement at yhe governor. He last strp is to slightly bend the rod that goes back to the catb so it just barely goes into the hole on the govener lever. |
Posted By: DrAllis
Date Posted: 30 May 2022 at 3:18pm
| Synchronize the governor to the carburetor first !! Engine OFF. Hand throttle wide-open. Disconnect the governor link rod behind the generator from the vertical governor arm. When you slide the link rod out of the arms hole, the vertical arm should NOT MOVE one bit. If the link rod is too long, put a bend in it in the middle to make it shorter so it will just fit. 1/8" too long is huge. Secondly, the throttle shaft on the carburetor cannot have any bind/drag on it. It has to be very free to move. Also, the cotter pin on the carb end of the link rod needs to be cut off short and wind it around tightly so it cannot interfere with linkage movement, because it can rub on the carb if installed sloppily. |
Posted By: exSW
Date Posted: 30 May 2022 at 4:17pm
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Definately to long by 1/4"! The new throttle assembly must clocked off counter clockwise. So do I throw the bend up or down? ------------- Learning AC...slowly |
Posted By: DrAllis
Date Posted: 30 May 2022 at 4:29pm
| Pull down on the center of the link rod. |
Posted By: exSW
Date Posted: 30 May 2022 at 4:56pm
Well, I didn't. The amount of deflection required would have fouled the throttle linkage. I had to remove it and put it in the vice. They must have used high tensile steel in that link. Works now. PTO doesn't affect it. Just pulled an 8% grade with an IH 155 spreader(empty). Second gear no drama. ------------- Learning AC...slowly |
DrAllis wrote:Posted By: DrAllis
Date Posted: 30 May 2022 at 5:03pm
| Technically, there is a tool to slide down on the vertical arm and bend it forward or backwards. Not having the correct tool might damage the cross linkage which is bad. Putting a kink (or two) in the link rod accomplishes the same thing and easier to do. |
Posted By: exSW
Date Posted: 30 May 2022 at 6:06pm
 ------------- Learning AC...slowly |
Posted By: DaveKamp
Date Posted: 30 May 2022 at 10:51pm
Have you checked the distributor for binding advance mechanism and worn distributor shaft bushing? ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |
Posted By: exSW
Date Posted: 31 May 2022 at 6:04am
Yes. Distributor was one of the first things I looked at when I started on the tractor. Since 90% of all carb problems are ignition.  ------------- Learning AC...slowly |