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Allis Chalmers Discussion Forum
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170 power director

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jrlii

04-15-2006 09:49:17




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While mowing the other day, I found myself frequently switching from low to high range (and vice versa) with the power director. Would this hurt anything? On the downshift, It usually takes me long enough to pull the lever that the speed is equalized, but the upshift tends to get a bit of a snort from the engine.




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Hurst

04-15-2006 11:15:39




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 Re: 170 power director in reply to jrlii, 04-15-2006 09:49:17  
We had a D17 series 4 diesel that had over 10,000 hours before an overhaul on it and it never had the clutches in the powerdirector replaced until the overhaul, so 35 years after my grandfather bought it new. It was a good tractor, we got rid of it because it blew a head gasket after the overhaul. They are VERY durable and also the clutches are running in oil, so they will last quite a while. Those things held up in about anything. I guarentee you that 99% of the tractors with the mechanical powerdirectors had operators that rode them quite a bit if used for baling or something that would require extra slow speeds for a period of time. That snort from the engine is just the gov kicking in and giving you a little more power. Nothing to worry about as long as you don't just go back,forth,back forth continuously with out stopping (like a kid playing with it, would be impossible to do any work shifting constantly from high to low and vise versus). As long as you don't slam it into range, which it doesn't sound like you are by how you describe the high to low shift, you will be fine. The clutches won't take long to cool down, so warpage shouldn't be a problem. They are pretty much a powershift that is mechanically controlled instead of hydraulically. Good luck, and by the way, a D17 series 4 is the same as a 170 except for the sheet metal, the diesel engine, and the hydraulic pump location on the later ones. Good luck with the tractor.

Hurst

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