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Jd ??

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Dan

03-19-2003 17:06:58




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what year did john deere start putting live pto on there tractors




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G-MAN

03-20-2003 05:07:57




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 Re: jd ?? in reply to Dan, 03-19-2003 17:06:58  
The first "live" PTO was on the "R", as was previously stated, and the same basic system was used on the 50/60/70. However, the system wasn't truly a live system by today's definition, because the PTO gear train had to be engaged with the engine off, which then allowed the hand-operated PTO clutch to drive the shaft. If you neglected to engage the gear train before starting, when you went to engage the PTO, you didn't have anything at all, and you'd have to stop the engine to engage it. The 50/60/70s were also available with a transmission-driven PTO that was similar to that used on the "A", etc. The "live" PTO was an option, and was referred to as an engine-driven PTO. I don't know about Dubuque tractors, but the first Waterloo tractors with a full live PTO would have been the New Generation 10 series - 3010, 4010 etc.

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Paul

03-20-2003 05:57:26




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 Re: Re: jd ?? in reply to G-MAN, 03-20-2003 05:07:57  
Is there a pto disengagment lever that I missed on my R's somewhere? as I recall the pto gear is drven directly from the crank through some gears into a clutch pack and then out to a power shaft. how much more live can it get?I believe the # series was the same only stronger and the row crops were driven off other side.Paul



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G-MAN

03-20-2003 07:42:57




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 Re: Re: Re: jd ?? in reply to Paul, 03-20-2003 05:57:26  
I'm not that familiar with the "R", but I own a 60 with "live" PTO, and I can tell you for a fact that there is a lever to disengage the PTO driveshaft. When it is engaged, the hand lever will engage the actual PTO clutch to turn the shaft. If it is disengaged, the hand lever will do nothing, as there is no shaft rotation. You are correct about the strengh issue, as the "R"s were known to be weak in the PTO, which was a problem, as the PTO has to be engaged to operate the hydraulic system. Once again, the first number tractors improved upon this by implementing the governor-driven hydraulic pump, which could also be turned off when hydraulics weren't needed - to save some power and wear.

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ron in MN

03-19-2003 21:41:28




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 Re: jd ?? in reply to Dan, 03-19-2003 17:06:58  
JD is correct. The "R" was first and it was 1949.



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JD

03-19-2003 18:54:20




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 Re: jd ?? in reply to Dan, 03-19-2003 17:06:58  

The R diesel had live PTO. The 50 and 60 had live PTO in 1952.



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AlbertoV05

03-19-2003 17:46:36




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 Re: jd ?? in reply to Dan, 03-19-2003 17:06:58  
Dan,
I believe it was with the "First Numbered Series" which were produced from 1952-56. I may be wrong, but I don't believe any A's ever came off the line with live pto.

Al in Iowa



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