175 gear reduction ?

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   Why did Allis slow the 175 tractors down ?
And 
The later 175 tractors even had a slightly bigger diesel engine. Than the 170 diesel.

My understanding is it was done thru the final drives.
But
I am still learning...

What the story here ?

Edited by Macon Rounds - 2 hours 33 minutes ago at 10:00pm

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Macon Rounds Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 18 Feb 2010 Location: Pittsburgh Pa Points: 2327	Post Options Post Reply Quote Macon Rounds Report Post Thanks(0) Quote Reply Topic: 175 gear reduction ? Posted: 2 hours 34 minutes ago at 9:59pm
	Why did Allis slow the 175 tractors down ? And The later 175 tractors even had a slightly bigger diesel engine. Than the 170 diesel. My understanding is it was done thru the final drives. But I am still learning... What the story here ? Edited by Macon Rounds - 2 hours 33 minutes ago at 10:00pm
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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 23587	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 18 minutes ago at 10:15pm
	175-180-185's all have the heavier duty/wider bull gear final drives that are 5.85 to 1 ratio. This began in 1967 with the new model One-Eighty. The HP was 64. The weight (with fluid) was around 8,000 lbs. The rear rubber was 18.4 x 28's that are larger diameter than a 16.9 x 28. The gear ratio reduction offset the larger diameter tire so that high second gear was still "plow gear". So, in the end engineers felt that anything over that 55 HP number was going to get the stronger final drives. Remember, after the 190XT and D-21 rear end failures, they weren't taking any chances.

Macon Rounds Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 18 Feb 2010 Location: Pittsburgh Pa Points: 2327	Post Options Post Reply Quote Macon Rounds Report Post Thanks(0) Quote Reply Posted: 2 hours 1 minutes ago at 10:32pm
	In my arena 170/175 tractors are not a tillage tractor. And in the rhelm of bigger tillage tractors why would you slow the 175 down. I currently run 30" tires on my D17's and 170 tractors for hay making operations. So to speed them up. I feel like i'am sleeping on my 175... Great technical data on the 175. Thanks Doc... Edited by Macon Rounds - 1 hour 51 minutes ago at 10:42pm
	The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate