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Why the overlap in 170/175 production
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Jason n View Drop Down
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Joined: 05 Feb 2018
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Points: 44 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jason n Quote  Post ReplyReply Direct Link To This Post Topic: Why the overlap in 170/175 production
    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?
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AC720Man View Drop Down
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Points: 5469 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 2020 at 7:53pm
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
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Points: 8429 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post 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, 
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Points: 10936 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 2020 at 8:02pm
Pretty sure they made a 175 gasser.
No greater gift than healthy grandkids!
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Points: 44 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jason n Quote  Post ReplyReply Direct Link To This Post 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
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Points: 22818 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.

Edited by DrAllis - 13 Sep 2020 at 8:56pm
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Points: 3670 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post 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.
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Points: 22818 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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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
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I would like to find a low hours 175 gasser.Handy tractor! Tracy
No greater gift than healthy grandkids!
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Originally posted by Tracy Martin TN Tracy Martin TN wrote:

I would like to find a low hours 175 gasser.Handy tractor! Tracy
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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.
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Camshaft grind is different on the 175.
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Points: 228 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gleaner1 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2020 at 4:33pm
Up till about two years ago I had no idea a gas 175 even existed.
There must have only been a handful built.
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Points: 5396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FREEDGUY Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2020 at 6:32pm
Originally posted by gleaner1 gleaner1 wrote:

Up till about two years ago I had no idea a gas 175 even existed.
There must have only been a handful built.
 
1009 total gassers built as per Tractor Data WinkWink
I see that the diesel versions came with 2 different CI Perkins engines ??


Edited by FREEDGUY - 15 Sep 2020 at 7:55pm
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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)
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Points: 29819 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2020 at 8:33pm
Originally posted by gleaner1 gleaner1 wrote:

Up till about two years ago I had no idea a gas 175 even existed.
There must have only been a handful built.
I have an uncle that bought a new 175 gas and he still has it. I drove it for him doing field work pulling a 2300 disk and moving round bales. It is a great tractor.
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