This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


170 vs 175 whats different
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
rieg View Drop Down
Silver Level
Silver Level


Joined: 17 Sep 2009
Location: swoh
Points: 364 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rieg Quote  Post ReplyReply Direct Link To This Post Topic: 170 vs 175 whats different
    Posted: 30 Sep 2017 at 7:50am
I have a 170 gas and looking at a 175 diesel coming up for auction. The years of production overlapped by several years so what are the differences? Any problems with the diesel?
rieg
Back to Top
Sponsored Links


Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 21725 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2017 at 8:16am
There were two different versions of the 170-175 as far as I'm concerned. The older models had the hydraulic pump mounted where the belt pulley goes, like a D-17 S4.  The newer models had the front axle redesigned and the hydraulic pump was underneath the radiator, shaft driven by the crankshaft. All 175's had the heavier (and a little slower) final drives from a 180-185. All 175's had a 10% faster second (3rd & 5th) gear in the transmission. Early 175 diesels were the Perkins 236 cubes and later were 248 cubes. All 175's were 60 HP or a little more versus 54 HP on any 170. The One-Seventy came out in July of 1967 and the first 175 was in 1971  ??  Different decals and paint schemes over the years.
Back to Top
DanD View Drop Down
Orange Level
Orange Level


Joined: 11 Sep 2009
Location: WI
Points: 856 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DanD Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2017 at 9:10am
And in the gas versions, both had the 226 engine rated at 1800 RPM.  The 170 came with 8.0:1 compression ratio pistons (Z suffix in engine serial number) while the 175 was 8.2:1 (V suffix in engine serial number).  The camshaft was different in the 175 gas tractor while the 170 used the same one as the D17.  Someone else will have to explain what the camshaft differences actually are.  I know there is a different profile on the lobes.  Also, the 170 has a 1 1/8" diameter carburetor while the 175 is 1 1/4".
Back to Top
AC7060IL View Drop Down
Orange Level
Orange Level
Avatar

Joined: 19 Aug 2012
Location: central IL
Points: 3516 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 2017 at 9:11am
Originally posted by DrAllis DrAllis wrote:


All 175's had the heavier (and a little slower) final drives from a 180-185.

Thanks DrAllis. How were the 180-185's finals heavier? Wider gears? shaft dia.?
Back to Top
rieg View Drop Down
Silver Level
Silver Level


Joined: 17 Sep 2009
Location: swoh
Points: 364 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rieg Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 2017 at 12:22pm
Thanks guys I learned something today!
rieg
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 21725 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 2017 at 12:26pm
175-180-185 final drives had wider bull and bull pinion gears and about 10% slower ratio. This allowed for the engine to run faster and keep actual ground speeds about the same.
Back to Top
TREVMAN View Drop Down
Orange Level
Orange Level


Joined: 04 Jan 2010
Location: Regina,Sask,Can
Points: 1635 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TREVMAN Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 2017 at 12:52pm
So, which of the "17" series of tractors was the best...In any event if the 175 goes reasonable, buy it. Never heard of any issues with either size Perkins. 
My Dad never had a 170 up tractor, I always thought they were one of Allis' most attractive looking tractors. That glossy photo on the cover of one of their pamphlets (I think it had a canopy on it and a guy standing in an Allis coat and hat beside)was unbelieveable. Ran a d17 diesel and a 185, both were great tractors. 
Trev.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.344 seconds.


Help Support the
Unofficial Allis Forum