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JD 50 compression release

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mike cates

07-25-2001 20:41:07




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While recently overhauling my model 50 engine,I
noticed the block is bored and tapped for compression release petcocks. I also saw a reference to it in my JD service manual.

Does anybody use these? Were they an optional
item? Seems like it would be a lot easier on my starter. What petcocks would fit?

Mike Cates




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Chuck

07-26-2001 15:04:50




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
good deal on the hand cranking...I stand corrected....



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Chuck

07-26-2001 11:30:14




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
am not sure of the LP connection to pitcocks but there were several all fuel 50's and they used the same block for these. You would have to have pitcocks to clear chamber on those. You cannot hand cranck the 50's without pitcocks and to my knowledge there were no avenues available for this, ie use of steering wheel. On gas or lp I see no use for the pitcocks at all and issue would be mute.



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Blaine

07-26-2001 15:00:30




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 Re: Re: JD 50 compression release in reply to Chuck, 07-26-2001 11:30:14  
Hi Chuck, I just hand cranked my "50" about ten
minutes ago with no compression release,useing
the steering wheel. Started on the first roll
over.Have fun,Blaine



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Byrl

07-26-2001 09:52:16




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
The reason that they have compression release openings in the block is because the 50 LP tractors used compression release petcocks.



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Chuck

07-26-2001 04:33:40




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
I have found that by adding electronic ignition my starting improved far more than another other modification. Eliminatred starting problems and plug problems all together. The electronic installs where there is no detection of appearance change. Would suggest this as an ideal.



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Don

07-25-2001 21:06:08




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
I have petcocks on a 1948 B John Deere. I open them in the winter time when the weather is real cold. It takes some of the strain off the starter and it starts easier. Even though my B has been changed from 6 to 12 volt I still feel the petcocks are a benefit. Very likely the petcocks off a later styled B would fit your 50. Many of the B and 50 engine parts were interchangable.



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Chuck

07-25-2001 20:46:36




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 Re: JD 50 compression release in reply to mike cates, 07-25-2001 20:41:07  
don't believe there would be any value in having those installed as cranking motor is needed with the distributor. If you had a magneto I suppose you could use the pitcocks and then crank by hand.



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