John Deere G Puller?

[Anonymous-0]

I would like to begin building a John Deeere G puller, but don't know what year, variation, etc. I should buy. Any suggestions are much appreciated. I have a solid John Deere 2020 Gas that I will have running tomorrow if anyone might be interested in trading a good G that I could transform into a puller. I am planning on having around 700 cubic inches if that makes a difference. Thanks

 

[Anonymous-0]

I would recommend a styled G, but it doesn't really matter. Unstyled G's are worth more because they are older and more rare, same goes for a GM. With a Styled G you have the option of adding 2-1/2 and 3-1/2 gears by changing out 5th and 6th gears. Other than the transmission the only difference is sheet metal. Styled G's have an electric start but you can do that to an unstyled or GM by switching the left side main bearing with one that has a starter bracket.

 

[ppmengineering]

Any G will work to make a puller. The main difference is some like the unstyled G's if they want to pull the lighter classes, 4000, 4500 and so on. There are several ways to get around 700ci. 6 3/4" bore by 9 3/4" stroke get 698ci. But with 6 3/4 bore you are going to have to have a block bored sleeved and welded. So if you are going to go to all that trouble you might as well make the bore 7" or bigger. The same goes with the crankshaft. If you can find someone who can grind a large crank, which there are some good ones out there, you can make you crank 10" or bigger. 7" bore by 10" stroke will make 770ci. The machine work will cost the same for either size. I have a G that would make a nice start for a puller. I also have a pair of 6 3/4" Jans pistions that would work in a G or large A. If you have a other questions you can get ahold of me, or I'm sure there will be more advice from this site! Hope this helps.

 

[Anonymous-0]

A JD G powerblock can be bored out to 6.75". Cost a lot less
to buy a powerblock than to have the sleeves welded in

 

[ppmengineering]

I was wondering if there was enough there to do that. we broke our block that those jans pistions were in and thought that might be possible. How hard is it to find a powerblock?

 

[Anonymous-0]

G powerblocks are harder to find than A or B powerblocks and are more expensive usually depending on the condition of the block. It would be cheaper to find one without pistons if you want to use ur pistons in them but your pistons might not work due to the extra cast donut at the top of the block for compression... depends on how your pistons are built.

 

[FactoryFarmer]

email me, I can get you started.

I'm going into the Marines a little sooner than I had planned so I have enough stuff to get you started, I would let it go for pretty much what I have in it...

1946 GM, sort of a carcass but it's exactly where you want to start IMO. No engine, no sheet metal and no back cover. Trans shifts good and there is nothing missing there. With something like this you can save alot of time by not having to tear apart a good tractor.

2- 7-1 PowerBlocks, no cracks but need to bored out (you would do that anyway) I think I really only want to get rid of one though because I'd like to put the other one in an A someday. I thought I had two more but I don't know where they are at...

F49R head, no valves, no cracks, ready to be reworked.

email me if interested: [email protected]

Thanks

PS, I want all of this stuff to go together so please don't email me and say I just want this or that. Thanks

 

[Anonymous-0]

Thank you all for all the feedback. I had a real busy day at work, and was sssoooo happy when I saw all the replys. Each one of them meant a lot.