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SD Allis 
Silver Level
Joined: 14 Sep 2009
Location: SD
Points: 55
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 Topic: 170 v. 175
Posted: 22 Apr 2017 at 8:33pm |
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Does someone know / What are the major differences between a 170 and a 175
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Mrgoodwrench
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Joined: 03 Apr 2011
Location: CHICORA PA
Points: 2095
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Posted: 22 Apr 2017 at 9:17pm |
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175 is five more than 170.
As I understand it rated rpm is the biggest difference
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There are 3 ways to do job GOOD, FAST, CHEAP. YOU MAY CHOOSE 2. If its FAST & CHEAP it won't be GOOD, if it's GOOD & CHEAP it won't be FAST, and if its GOOD & FAST it won't be CHEAP!!!!
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Eldon (WA)
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Joined: 11 Sep 2009
Location: Spokane, WA
Points: 7765
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Posted: 22 Apr 2017 at 10:10pm |
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I have both in diesel models and really can't tell the difference.
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ALLIS EXPRESS!
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7539
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Posted: 22 Apr 2017 at 10:43pm |
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No major differences. 170 diesel uses the Perkins 236 and so did first year 175s. All other 175s had the 248 Perkins.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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B26240
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Joined: 21 Nov 2009
Location: mn
Points: 3866
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Posted: 23 Apr 2017 at 6:07am |
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One interesting trivia fact about the 175 gas is it was the last gas tractor AC built.
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DrAllis
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Joined: 12 Sep 2009
Points: 22171
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Posted: 23 Apr 2017 at 9:24am |
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54 HP versus 60 HP. All 175's had 185 final drives, which were geared a little slower. All 175's had a 15% faster second gear in the transmission. 175's had a hydraulic oil cooler (I think).
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
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Posted: 23 Apr 2017 at 9:27am |
 DrAllis wrote:
54 HP versus 60 HP. All 175's had 185 final drives, which were geared a little slower. All 175's had a 15% faster second gear in the transmission. 175's had a hydraulic oil cooler (I think). |
Mine does not have an oil cooler - 1977, family owned since new.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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DrAllis
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Posted: 23 Apr 2017 at 9:36am |
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And I think it was standard in 1971, but later made an option on the 175 tractor as a cost reducing change.
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