Why the overlap in 170/175 production
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=174370
Printed Date: 03 Apr 2026 at 7:02am
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Topic: Why the overlap in 170/175 production
Posted By: Jason n
Subject: Why the overlap in 170/175 production
Date Posted: 13 Sep 2020 at 7:45pm
| Always wondered why ac continued to make the 170 for 3 additional years after the 175 came out? |
Replies:
Posted By: AC720Man
Date Posted: 13 Sep 2020 at 7:53pm
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My guess is the 175 was powered by the Perkins diesel and there were still folks that wanted the same size tractor but in the gas version. JMO ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: DougG
Date Posted: 13 Sep 2020 at 7:55pm
| They did the same with One Eightys and 185,s ,, all the same componets,s just a little horsepower tweaking, |
Posted By: Tracy Martin TN
Date Posted: 13 Sep 2020 at 8:02pm
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Pretty sure they made a 175 gasser. ------------- No greater gift than healthy grandkids! |
Posted By: Jason n
Date Posted: 13 Sep 2020 at 8:06pm
| They made both models with 236 perkins or a 226 gas. I believe 175 gas put out couple more horses than 170 gas. Diesels were the same till 175 went to 248 perkins diesel in 1972 |
Posted By: DrAllis
Date Posted: 13 Sep 2020 at 8:44pm
| Two different HP/sizes of tractors !! 170 was 54 HP gas and diesel. 175 was 60 HP gas and 62 HP diesel. 175's all had 180/185 final drives which were stronger than 170 final drives. |
Posted By: AC7060IL
Date Posted: 13 Sep 2020 at 11:25pm
| Besides their improvements, the 175 & 185 models were marketed as “Crop Hustlers” themes. Basically they could pull same tillage equipment used by the previous older 170 & 180 models, but did so a little faster. |
Posted By: DrAllis
Date Posted: 14 Sep 2020 at 7:20am
| At that time Deere had replaced the 2510 (53 HP) with the 2520 (60 HP). So, it made sense for AC to come up with a model to directly compete with it. Kind of the same thing with the 185 (74 HP) versus the One-Ninety (77 HP). The 185 was cheaper to build and sell and on many jobs was handier. Few straight One-Ninety's were sold in favor of the more powerful "XT" for a few hundred dollars more. |
Posted By: Lonn
Date Posted: 14 Sep 2020 at 7:42am
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from '70 to '73 Allis offered: All at pto hp at rated engine speed 160 = 40 dsl hp 170 = 54 gas & dsl hp 175 = 61 gas/62 dsl hp (in late '70 the 236 perkins was replaced by a 248 perkins... not sure which was tested at Neb.) 180 = 65 gas/64 dsl hp 185 = 75 dsl hp 190 = 75 gas/77 dsl hp (may have been dropped before 1973 190 XT = 90 gas/94 dsl hp (later ones with engine upgrades were not tested) replaced by 200 in '72 200 = 94 dsl hp (started in '72 & sold under the old 1965 190XT hp but was more likely around 105 to 110 hp.) 210 = 122 dsl hp 220 = 136 dsl hp The the 440 came in 1972 and the 7030/7050 in 1973 ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: Tracy Martin TN
Date Posted: 14 Sep 2020 at 10:43am
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I would like to find a low hours 175 gasser.Handy tractor! Tracy ------------- No greater gift than healthy grandkids! |
Posted By: IBWD MIke
Date Posted: 15 Sep 2020 at 7:23am
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Tracy Martin TN wrote:Posted By: TramwayGuy
Date Posted: 15 Sep 2020 at 8:52am
| According to the Nebraska test data, the difference between the 175 and 170 gas horsepower appears to be due to compression ratio of 8.2 versus 8.0 and carburetor size of 1-1/4” vs. 1-1/8”. A penalty in fuel efficiency resulted also. |
Posted By: DrAllis
Date Posted: 15 Sep 2020 at 9:09am
| Camshaft grind is different on the 175. |
Posted By: gleaner1
Date Posted: 15 Sep 2020 at 4:33pm
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Up till about two years ago I had no idea a gas 175 even existed. There must have only been a handful built. ------------- ALLIS CHALMERS "The color is orange" |
Posted By: FREEDGUY
Date Posted: 15 Sep 2020 at 6:32pm
1009 total gassers built as per Tractor Data  I see that the diesel versions came with 2 different CI Perkins engines ??
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Posted By: jiminnd
Date Posted: 15 Sep 2020 at 8:08pm
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Neighbor had a 175 Gas, when he moved off the farm he wanted to sell it to me, I wanted it but just couldn't swing it, he sold it to someone in Minn. ------------- 1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner) |
Posted By: Lonn
Date Posted: 15 Sep 2020 at 8:33pm
------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |