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carb for h3

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=196414
Printed Date: 23 Nov 2024 at 3:39pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: carb for h3
Posted By: lost in h3
Subject: carb for h3
Date Posted: 30 Jul 2023 at 9:44pm
Purchased a zenith replacement carburator for my h3. Have been trying for a week to get the carb and govenor set right to no avail. Paid a lot for the caburator which seems to run good on its own but hooked up to govenor no work. Should I try rebuilding the old marvel scheber which is an odd number. I've yet to find a kit for it.



Replies:
Posted By: PaDon
Date Posted: 30 Jul 2023 at 9:52pm
I also have an H3, a '61 model. I took the Marvel Schebler off and tried cleaning it but couldn't get it to run so I ordered a replacement from Steiner and got a New Zenith. I haven't put it on yet, I'm going to drill out the Zenith manifold bolt holes to match the Schebler, so I'm interested to know what you find out. Good luck, I'll be watching your thread.


Posted By: PaDon
Date Posted: 30 Jul 2023 at 9:55pm
Also, I ordered a rebuild kit for the Marvel Schebler from Steiner but the main jet was different in the kit they sent. I wasn't going to piece it together so ordered the replacement carburetor.


Posted By: doctorcorey
Date Posted: 30 Jul 2023 at 10:23pm
Could you please explain what you mean by  'runs good' until governor is hooked up. Do you mean it idles good, but won't provide power when you load it?

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Semper Fi USMC    1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel


Posted By: lost in h3
Date Posted: 30 Jul 2023 at 10:39pm
runs good at idel and respones well to wide open but hooked up to govenor  will not idel


Posted By: doctorcorey
Date Posted: 31 Jul 2023 at 9:05pm
Originally posted by lost in h3 lost in h3 wrote:

runs good at idel and respones well to wide open but hooked up to govenor  will not idel
Whatever it is, it's probably not a carburetor problem. Maybe linkage or carb throttle bellcrank misadjusted or in wrong position on throttle shaft. Bad governor?

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Semper Fi USMC    1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel


Posted By: doctorcorey
Date Posted: 31 Jul 2023 at 9:06pm
Originally posted by doctorcorey doctorcorey wrote:

Originally posted by lost in h3 lost in h3 wrote:

runs good at idel and respones well to wide open but hooked up to govenor  will not idel
Whatever it is, it's probably not a carburetor problem. Maybe linkage or carb throttle bellcrank misadjusted or in wrong position on throttle shaft. Bad governor?
   BTW, what part of Missouri are you in?

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Semper Fi USMC    1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel


Posted By: DrAllis
Date Posted: 31 Jul 2023 at 10:00pm
If this is a "universal" carb, the throttle shaft and its lever are adjustable ?? I think you need to synchronize the governor to the carb.     ENGINE OFF. Hand throttle wide open. Disconnect the carb to governor arm link rod above the generator. The length of this link rod should be such that it will easily slide right back into the hole on the governor arm. Do whatever it takes to make a fully open throttle butterfly link rod to slip right into a fully open governor arm. Understand ?? It is basic governor to carburetor synching.


Posted By: Codger
Date Posted: 31 Jul 2023 at 11:27pm
H3 Governor:




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That's All Folks!


Posted By: DrAllis
Date Posted: 01 Aug 2023 at 6:04am
Do NOT try and bend that governor cross arm !!!  The link rod itself has enough kinks and bends in it that can be straightened to get the length you may need. A universal fit carb should have the throttle shaft lever adjustable, not needing to change the engines parts to synch it. For a novice to try and bend that cross arm can turn out badly. Don't do it. I've never had to bend a cross arm in 50 yrs. Always changed the link rod length.


Posted By: PaDon
Date Posted: 01 Aug 2023 at 9:44am
Excellent, thank you. I have a new exhaust manifold and new Zenith carb to put together on mine, this is great information.


Posted By: lost in h3
Date Posted: 01 Aug 2023 at 2:34pm
Best info I've had. Going to try again.

Lost in H3


Posted By: lost in h3
Date Posted: 01 Aug 2023 at 2:40pm
doctorcorey

i'm located in north lincoln county missouri


Posted By: doctorcorey
Date Posted: 01 Aug 2023 at 2:51pm
Originally posted by lost in h3 lost in h3 wrote:

doctorcorey

i'm located in north lincoln county missouri
I owned a 80 acre ranch south of Cole Camp for the last 30 years. Still go down there occasionally to Zimmerman's Tractor for parts for my 6G. 

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Semper Fi USMC    1958 HD6G, 1959 MF 203 loader, 1960 Case 420B Backhoe, MF 65 Tractor/Loader Diesel


Posted By: lost in h3
Date Posted: 01 Aug 2023 at 10:22pm
Still trying to get the zenith carb. syc. with the governor. Opened up governor and carefully checked everything. Nothing wrong with it. Checked all rod linkage and everything ok. I've got to the point where I understand how and why governor works. The problem is the rod from carb is just not long enough to properly reach the cross rod and the carb linkage is not flexible enough to make it happen. I'm going to cut rod from carburetor in two pieces and make it adjustable for length. Tired of bending rod.  

lost in h3






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