jd 4010 301 prpoane motor October 17, 2009 03:57AM
I am trying to find out what to do with my orginal jd 4010 propane tractor.My class limits me to 370ci . Can I bore and put 4020 gas 361ci kit in it?What is the best and cheapest approach? Thanks;Ted
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Re: jd 4010 301 prpoane motor October 17, 2009 05:55AM
Your engine is 302. 4"x4" bore & stroke.
early 4020 is 341. 4 1/4"x 4" bore & stroke.
late 4020 is 362. 4 1/4"x 4 1/4" bore stroke.

you would need the 362 crank & pistons for this job, and I'm not sure if it will all fit in the same. Not sure if late 4020 block is a little different.
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Re: jd 4010 301 prpoane motor October 17, 2009 11:34AM
Thanks for the information.
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Re: jd 4010 301 prpoane motor November 08, 2009 12:21AM
is this gas or deisel
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Re: jd 4010 301 prpoane motor November 08, 2009 01:13AM
These are gas / LP. 4 main blocks. The 4010 & early 4020 are the wide deck blocks w/ bucket type lifters, the late 4020 has the mushroom type lifters. Not sure if the cranks will interchange between the early & late blocks or not.
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Re: jd 4010 301 prpoane motor November 08, 2009 02:49AM
the cranks will fit in fact I ran a 7 main crank in gas block one year to save weight when we ran 4010 at 5000 lbs
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Re: jd 4010 301 prpoane motor November 08, 2009 09:55PM
george please call me at 262 770 1345
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Re: jd 4010 301 prpoane motor November 09, 2009 09:59AM
You must have sacrificed ci to do this, the deck height would have been a nice bit shorter. Did you compensate with a deck plate??
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Re: jd 4010 301 prpoane motor November 10, 2009 05:29AM
The deck is 1" shorter on the gasser but that doesn't affect CID directly. They just needed to take 1/4" out of the piston compression height of the 362 due to the stroke change. I'm betting you can come up with a combo using gas rods & automotive pistons, the stock gasser pistons have a bunch of compression height.
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Re: jd 4010 301 prpoane motor November 10, 2009 10:15PM
Good point, hadn't thought of it that way. Finding an automotive piston with 1.25" piston may be tough. Guess you could always bush the rod hole down if you had to.
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Re: jd 4010 301 prpoane motor November 11, 2009 02:37AM
Yep & that allows you to adjust the length a litte bit with an offset bushing.
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Re: jd 4010 301 prpoane motor October 18, 2009 03:05PM
Ted - give me a call or list your phone # - I can help out. ---- Dave
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