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WD throttle setting and RPM.
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exSW View Drop Down
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Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914 		Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Topic: WD throttle setting and RPM.
    Posted: 30 May 2022 at 2:04pm
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.

Edited by exSW - 30 May 2022 at 2:07pm
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Dakota Dave View Drop Down
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Joined: 12 Sep 2009
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Points: 3971 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dakota Dave Quote  Post ReplyReply Direct Link To This Post 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.
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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.
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Points: 914 		Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2022 at 4:17pm
Definately to long by 1/4"! The new throttle assembly must clocked off counter clockwise.
So do I throw the bend up or down?
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DrAllis View Drop Down
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Joined: 12 Sep 2009
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Pull down on the center of the link rod.
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exSW View Drop Down
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Joined: 21 Jul 2017
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Points: 914 		Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2022 at 4:56pm
Originally posted by DrAllis DrAllis wrote:

Pull down on the center of the link rod.


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.
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Points: 21936 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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DaveKamp View Drop Down
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Points: 6077 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveKamp Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2022 at 10:51pm
Originally posted by exSW exSW wrote:

Changes without pattern. ...
It does seem to be load related. I was jockeying a manure spreader around and it seemed to be worse.


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.
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Joined: 21 Jul 2017
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Points: 914 		Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 31 May 2022 at 6:04am
Originally posted by DaveKamp DaveKamp wrote:

Originally posted by exSW exSW wrote:

Changes without pattern. ...
It does seem to be load related. I was jockeying a manure spreader around and it seemed to be worse.


Have you checked the distributor for binding advance mechanism and worn distributor shaft bushing?

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.

Edited by exSW - 31 May 2022 at 6:06am
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