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Allis Chalmers Discussion Forum
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wd45 rear end, diesel or gas any difference?

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m.jamison

09-20-2005 19:15:27




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I heard that a 45 diesel had a lower geared rear, than a gas. true or false? If true what is the difference in top speed of first gear?




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Texas Denny

09-21-2005 06:56:32




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 Re: wd45 rear end, diesel or gas any difference? in reply to m.jamison, 09-20-2005 19:15:27  
The diesel version was rated at 1625. The gas version at 1400. Both tractors had a low gear maximum speed of 2.5 mph. Since the engines at max speed are different rpm's, this difference must be made up by a gear ratio change. If it is done in the transmission, every gear would need to be different. If done in the rear end, only two gears need to be changed. That is probably where they made the adjustment. If you put a gas engine in a diesel transmission and differential tractor, you would expect a max low gear speed of 2.15 mph and an increase of torque (or pull) of 16%.

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Texas Denny

09-21-2005 06:56:10




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 Re: wd45 rear end, diesel or gas any difference? in reply to m.jamison, 09-20-2005 19:15:27  
The diesel version was rated at 1625. The gas version at 1400. Both tractors had a low gear maximum speed of 2.5 mph. Since the engines at max speed are different rpm's, this difference must be made up by a gear ratio change. If it is done in the transmission, every gear would need to be different. If done in the rear end, only two gears need to be changed. That is probably where they made the adjustment. If you put a gas engine in a diesel transmission and differential tractor, you would expect a max low gear speed of 2.15 mph and an increase of torque of 16%.

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