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Author Topic: Rear Engine Deere AP  (Read 8202 times)
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DeereRacer
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« on: July 03, 2012, 11:21:02 PM »

I purchased a 1979 John Deere 65 off of ebay a few years ago with intentions of making a racer out of it and now I am finally getting to it. I got it tore down to a bare frame and started cutting excess brackets and metal off it.

 
 
I have a few things that are worrying me about the build at the moment. The engine crank shaft and rear axle are going to be in real close proximity to each other. With some rough measurements the 13X6.50-6 Turf savers I plan on running will put the rear axle right in the middle of the 4" tall frame with the frame 4" off the ground. Because of this I will have to run the engine drive pulley under the rear axle about 3" down the crank shaft from the bottom of the engine. I will also have to lower the trans to line up the belt but that is a good thing because it will give me more room to lower the seat after I give the engine a 90* turn to the left. Do you guys think the pulley sitting that far out on the end of the crank shaft will cause any issues?
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« Reply #1 on: July 04, 2012, 01:16:26 AM »

Unless your rules say you can alter the wheelbase, it has to be in the stock position.
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« Reply #2 on: July 04, 2012, 07:12:54 AM »

Doesnt sound to me like he is altering the wheel base. He just wants to know if there will be any problems running the pulley that low on the engine.
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Steve
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« Reply #2 on: July 04, 2012, 07:12:54 AM »

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« Reply #3 on: July 04, 2012, 10:31:33 AM »

Doesnt sound to me like he is altering the wheel base. He just wants to know if there will be any problems running the pulley that low on the engine.

I think I have sunburned my brain. Not many run rear engine riders, you will have to
invent alot of what you want to do, and trial and error your racer. Anything is possible
with that pulley out that far. I personally do not know anyone running a rear engine mower.
Would it work with the pulley on the end of the crank, yes, as long as it bolts on. Will
it stay for a while, not sure how long. There will be more pressure on the seal and the
case due to the leverage. A third bearing support comes to mind.
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« Reply #4 on: July 04, 2012, 01:17:11 PM »

I realize the rear engine platform is not ideal but Deere never made a mid engine mower or even a light weight front engine but I like a challenge and it will be different. If I were to cut an 1" off the bottom of the frame I could then move my axle higher in the frame and still be at 4" height plus i would be able to move the pulley closer to the engine the same amount. If the frame was cut neatly it wouldn't even be noticeable but would the rules allow it?
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« Reply #5 on: July 04, 2012, 02:14:02 PM »

We cut projections off the mowers from time to time. The key word is discrete.
So long as the line is even all around, that would be ok. On all the MTD mowers
that have a lip in the front, we have to cut that off, and a few on the back.
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« Reply #6 on: July 04, 2012, 04:02:44 PM »

The problem with that platform is the first thing to the wreck is your feet the second thing is your man pride wrapping around the steering column. Thats not to say they cannot be made to run and handle but its  gonna be a chore.
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« Reply #7 on: July 04, 2012, 04:27:26 PM »

what would happen if you sucked the pulley right up to the bottom of the engine pan. is there room for the belt to travel above the axle?
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« Reply #8 on: July 04, 2012, 05:10:42 PM »

I built one rer for a guy and never again haha. What a pain. Although I like this jd 65
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joshua "MEAT" coleman

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« Reply #9 on: July 04, 2012, 07:11:01 PM »

what would happen if you sucked the pulley right up to the bottom of the engine pan. is there room for the belt to travel above the axle?
That could work though I would have to move  the axle to clear the  pulley and that would raise the rear. It would also raise my planed lower seat height becouse it sits over the transmission. This build is geting more complicated than I though it would be but thanks for all the comments guys.
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« Reply #10 on: July 05, 2012, 07:52:26 AM »

its not set in stone that you must have your ride hieght at 4 inches. a little higher would not hurt so you can clear the axle.
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« Reply #11 on: July 06, 2012, 03:41:11 PM »

i would rather sacrifice an inch in ride height in order to have the pulley closer to the engine and not have that extra force on the crank
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Nick Lema
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« Reply #12 on: July 06, 2012, 05:29:29 PM »

i would devise a plan to have both,
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joshua "MEAT" coleman

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« Reply #13 on: July 07, 2012, 09:28:32 AM »

i would devise a plan to have both,

An inch higher ride height AND the pulley all the way out on the shaft???  lol  rofl
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Nick Lema
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« Reply #14 on: July 07, 2012, 11:31:39 AM »

An inch higher ride height AND the pulley all the way out on the shaft???  lol  rofl

very funny coming from the one armed bandit.
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joshua "MEAT" coleman

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2011 nelmra sp-b 2nd place


POWERED BY THE COMPLEX
2012 NELMRA B/P and C/P Champion
2012 ARMA NE NATS......SUPER SPORTSMAN  2nd and 3rd place feature finishes 1st time off the trailer!

special thanks to MY NELMRA GUYS, George Herrin, EC DISTRIBUTING, E3 spark plugs,and my wife for putting up with it all!
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