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John Deere Tractors Discussion Forum
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Re: How do you start a John Deere 70 Diesel?

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JohnDeereJimOhio

07-04-2013 19:47:41
174.238.161.83



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Push the throttle a head a little.. Turn gas switch for pony motor on all the way turn the light switch one click , press the little starter pedal down by left foot, use the throttle and choke switch on left if the dash, let her warm up a bit ( don"t just let the pony motor start and scream wide open it will last longer if u let it warm up properly and let it warm up the big engine) when it"s ready to go after a couple minutes pull the lever on the left that engages the fly wheel.. Hope this helps.. Good luck..

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buickanddeere

07-05-2013 07:44:22
184.151.61.131



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 Re: How do you start a John Deere 70 Diesel? in reply to JohnDeereJimOhio, 07-04-2013 19:47:41  
Wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong



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Tx Jim

07-05-2013 10:15:20
69.35.160.115



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 Re: How do you start a John Deere 70 Diesel? in reply to buickanddeere, 07-05-2013 07:44:22  

buickanddeere said: (quoted from post at 10:44:22 07/05/13) Wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong


Hey b&d what's wrong,wrong,etc.??????
This post was edited by Tx Jim at 10:24:09 07/05/13.



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buickanddeere

07-06-2013 06:44:37
209.240.113.204



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 Re: How do you start a John Deere 70 Diesel? in reply to Tx Jim, 07-05-2013 10:15:20  
Jim ohio is washing down the cylinder walls with raw fuel and contaminating the crancase oil. Slobber up the stack too. Deere also requested prelubing the bearings before applying compression. And it just makes sense to do so when possible. Two lever tractors whose operator doesn't use the decompressor suffer more clutch wear.



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Eric Allen

07-04-2013 20:05:10
66.152.115.226



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 Re: How do you start a John Deere 70 Diesel? in reply to JohnDeereJimOhio, 07-04-2013 19:47:41  
Thanks! That sounds doable. I've never used a tractor with a pony before. I've read the 70 set fuel economy records that stood for decades



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Tx Jim

07-05-2013 04:14:14
69.35.160.118



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 Re: How do you start a John Deere 70 Diesel? in reply to Eric Allen, 07-04-2013 20:05:10  
I thought one was suppose to let diesel engine turn over a few revolutions before pushing throttle forward to give the diesel any fuel. Also be sure and turn ign switch off after diesel starts as pony motor coils are expensive.



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coonie minnie

07-05-2013 04:40:59
166.182.3.65



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 Re: How do you start a John Deere 70 Diesel? in reply to Tx Jim, 07-05-2013 04:14:14  
You are correct Jim, there are a couple steps missing. The poster would be WELL advised to get a manual.

On my 720, a little different than the 70, I motor the big diesel over with no compression til the oil pressure comes up. Then I release the decompression lever, motoring on full compression, and then advance the throttle, and it will start.

I've never started a 70 with the one lever system, the 720s and 820s I've run all had the separate decompression lever. Can someone on here explain the one lever system??

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buck eye al

07-05-2013 14:40:57
168.251.194.18



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 Re: How do you start a John Deere 70 Diesel? in reply to coonie minnie, 07-05-2013 04:40:59  
The original single lever process simply energized the cranking engine's starter motor when you pushed it forward. It took a pretty stout push but that's how it worked. The trouble with it was if you pushed too hard when disengaging from the Diesel it was possible to re-engage the cranking engine's starter with the then running (at about 6000 RPM) cranking engine.

Normally this forward motion on that single lever was taking place when the diesel had just started. On the 70D the cranking engine was governed at 6000 (I think they calmed them down a bit on the 720 and 730) and he had just finished his task of starting the diesel so it was going full bore which was NOT a good time to ever bump the starter drive pinion into the flywheel.

They re-designed them starting with 7026869. Earlier 70's could be converted using the AF 2305 starter pedal assembly kit. I have one such "converted" tractor.

Hope that helps.

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