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Jon F from MN...PTO on 1070 question

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Kow Farmer

10-10-2012 10:13:50




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Hi Jon,
I read your posting earlier about not having the 70 series tractor in reverse with the PTO engaged. Can you tell me what that is about please? I just bought my 1977 1070 2 weeks ago and have a 7.5' 2 stage snowblower for it. Am I going to be in trouble with this situation?
Thank you.
Kow Farmer (Kurt)




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1370rod

10-10-2012 17:55:23




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 Re: Jon F from MN...PTO on 1070 question in reply to Kow Farmer, 10-10-2012 10:13:50  
Kurt, the RPS 34 powershift as CASE has so named it has no Reverse Gear. Reverse is achieved in the powershift by spinning a set of plantetary gears in a drum gear. When this unit is operating in Reverse it is spinning at a speed twice engine RPM. You all have noticed the whine you hear in rev. yes that is the powershift spinning like crazy. The warning is not to leave the shifter in rev. when doing (stationary) PTO work. Why, because it is spinning fast enough to sling lube oil off and internal friction in the clutch packs begin to build heat. Left operating in this mode long enough will damage clutch packs. A perfect example is when a tractor is backed up to a silo and blows silage all day with the shifter in rev. That will damage them. Blow snow is very short term with cold conditions and I have never heard of a problem with that. Nobody will blow snow for hours without going forward every couple minutes. Infact these tractors make a better snowblowing tractor than one with a dry clutch. You can slip them all day long and does'nt seem to hurt a thing. Of course somebody will prove me wrong LOL, but seriously I live in snow country and it has never been a problem here. Thats my 2 cents worth, Rod.

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Kow Farmer

10-10-2012 19:03:40




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 Re: Jon F from MN...PTO on 1070 question in reply to 1370rod, 10-10-2012 17:55:23  
Rod,
I really appreciate your comments. That makes a lot more sense to me. One of my coworkers was JD tractor mechanic and said when he was in tech school they learned about this happening to the 70 series tractors. So naturally he had me worried I couldn't blow snow with it. But then I thought, I have 2 neighbors that had snowblowers on their 1070's for years with no issues. So I knew I had to ask what the deal is with the reverse gear and PTO issue. Thank you for clarifying this up for me. So, also slipping the clutch while snow blowing won't bother then either? Whew! I feel better now.
Kow Farmer (Kurt)

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oldtanker

10-10-2012 14:08:50




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 Re: Jon F from MN...PTO on 1070 question in reply to Kow Farmer, 10-10-2012 10:13:50  
BIL learned the hard way about PTO and R. He got a 970 in the mid 70's. First time he used the PTO on it was for blowing sileage. Last move to hook up to the blower was reverse. He left it in R. He will not own another Case.

Rick



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jon f mn

10-10-2012 11:04:17




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 Re: Jon F from MN...PTO on 1070 question in reply to Kow Farmer, 10-10-2012 10:13:50  
Not as long as you are moving, such as your snow blower. It is only a problem when you are sitting still and the powershift is in reverse and you are using the pto. So say you leave the powershift in reverse on the blower or something. Don't know why or what it does, but I know it's not good. There should be a large warning on the dash by the pto lever and I think one on the dash by the steering too. You have to have all 3 things at once for it to be a problem. Stopping for a little bit while blowing snow or something isn't a problem either, we used snow blowers all the time on our 970 and my brother's 2290 with no problems.

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Kow Farmer

10-10-2012 12:16:29




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 Re: Jon F from MN...PTO on 1070 question in reply to jon f mn, 10-10-2012 11:04:17  
Thanks for the heads up. I was starting to sweat bullets there for awhile. LOL
Kow Farmer (Kurt)



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Rich10e

10-10-2012 15:50:08




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 Re: Jon F from MN...PTO on 1070 question in reply to Kow Farmer, 10-10-2012 12:16:29  
Had a blower on a 970 for 25 yrs I had to shut off the pto when I went ahead or I would shear a pin when the clutch kicked just something I had to get used to,no probs with the pto though



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dboll

10-10-2012 17:35:12




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 Re: Jon F from MN...PTO on 1070 question in reply to Rich10e, 10-10-2012 15:50:08  
the R thing is a lube issue ,there is a sticker in most saying not to leave it in R doing STATIONERY pto work, early ones had a surging problem that would shear pins, that problem got resolved from what I was told, my 75 1070 doesn't bother on a blower, as for the guy that left it in R on the blower, that was his screw up not Case's



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1370rod

10-10-2012 18:16:20




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 Re: Jon F from MN...PTO on 1070 question in reply to dboll, 10-10-2012 17:35:12  
Doug, the early tractors drove the PTO off the same shaft that drove the powershift. When it was shifted or clutched, the surge caused a whipping action in the pto which would shear pins. Later tractors had a seperate flywheel driven shaft for the PTO, that fixed the problem. All white tractors had the cure and some of the very latest sunset ones. There are listed ser. no. breaks if someone really needs to know. Rod.

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dboll

10-11-2012 17:09:28




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 Re: Jon F from MN...PTO on 1070 question in reply to 1370rod, 10-10-2012 18:16:20  
Dad's sunset 970 was a pita on a blower, also reverse was plenty fast , my 1955 Oliver was much nicer to blow with for these reasons in R1 under it was very slow in reverse and 25 or 30 extra hp didn't hurt either!



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