carb problem

General help and support for your Lindeman through 2010 John Deere crawler
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gregjo1948
350 crawler
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Re: carb problem

Post by gregjo1948 » Thu Oct 25, 2018 4:20 am

mnfordtech wrote:
Wed Oct 24, 2018 11:31 am
When my carb is all together the venture will not move, so I assume that it is sealing. I sent you a P.M.
Is it possible that the venture is installation direction sensitive? Upside down????
JD 350B diesel w/rops & 6way blade, Case 580B Loader/backhoe, Farmall 504 highcrop, International 404 utility, International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller

mnfordtech
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Re: carb problem

Post by mnfordtech » Thu Oct 25, 2018 6:18 am

Venturi can only go in one way - one end is larger than the other.

mnfordtech
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Re: carb problem

Post by mnfordtech » Thu Oct 25, 2018 9:34 am

Lavoy, I sent you another P.M. I would like to purchase a kit for this carb to see if that will fix it.

yellowcrawler
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Re: carb problem

Post by yellowcrawler » Thu Oct 25, 2018 12:21 pm

Lavoy is correct, originally the venturi fits tightly. I believe over time the venturi relaxes and loses the tight fit, that is why I used the sealer and it cured my problem. I believe the venturi is aluminum or pot metal while the carburetor body is cast iron.
1960 440 ICD with 602 blade
1960 440 ICD with 831 bucket
1960 440 ICD with 831 bucket, center throttle

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Lavoy
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Re: carb problem

Post by Lavoy » Thu Oct 25, 2018 12:29 pm

They should be brass, but have seen some plastic or synthetic ones on occasion.
I have been replying to your PM's, must not be getting them. Shoot me an e-mail at postmaster@jdcrawlers.com instead.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

mnfordtech
40C crawler
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Re: carb problem

Post by mnfordtech » Tue Oct 30, 2018 6:20 am

Update - rebuilt the carb installing all new parts from a carb kit but still have the same problem. If I ever figure this thing out I'll let everyone know. Leaning towards replacing the carb if I can find one. Wish me luck!

mnfordtech
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Re: carb problem

Post by mnfordtech » Fri Nov 09, 2018 10:56 am

UPDATE - replaced the carb with a rebuilt and my dozer runs like a charm! Tried it out by pushing out a pine stump from a tree that had blown over from a storm this summer and it didn't hesitate one bit. I had even sprayed some paint on the machine to make it look pretty. :)

B Town
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Re: carb problem

Post by B Town » Fri Nov 09, 2018 12:45 pm

Is the original carb for sale??

mnfordtech
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Re: carb problem

Post by mnfordtech » Sat Nov 10, 2018 6:39 am

Had to send it back for a core charge.

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Paul Buhler
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Re: carb problem

Post by Paul Buhler » Sat Nov 17, 2018 6:15 pm

I realize that I'm late to the party, but maybe this will be helpful in the future.
http://www.oldcarmanualproject.com/manu ... TX-TSX.pdf
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420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch

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notmeu
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Re: carb problem

Post by notmeu » Sat Nov 17, 2018 8:45 pm

Good link Paul!! Thanks
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.

mnfordtech
40C crawler
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Re: carb problem

Post by mnfordtech » Sun Nov 18, 2018 8:05 am

Thanks for the link but I had already printed this thinking it would help me with my problem but replacing the carb was the only solution,

Jerrye
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Re: carb problem

Post by Jerrye » Wed Nov 21, 2018 7:53 am

I had that problem with a 420 C, even had the carburetor rebuilt and problem persisted. I finally took carburetor apart and took an air chuck with a rubber tip so I would get somewhat of a seal and blew through all holes, especially all of the small ones. Some are barely larger than a pin. Problem solved, the tractor idles smooth without using choke.

mnfordtech
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Re: carb problem

Post by mnfordtech » Wed Nov 21, 2018 12:32 pm

Believe me, I tried this same thing several times with my carb but could not find/fix the problem with it. Whatever was wrong with it will remain a mystery.

Ray III
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Re: carb problem

Post by Ray III » Fri Nov 23, 2018 5:21 am

I'm guessing you didn't find all the holes in the load jet Lavoy mentioned. They can get so completely filled in that they no longer exist, and you have to shine it up to see where there are dark spots instead of brass.

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