Farm Equipment - 180/185 Pre-Cleaner Question ?

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180/185 Pre-Cleaner Question ?

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=210149
Printed Date: 21 Feb 2026 at 8:51pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 180/185 Pre-Cleaner Question ?

Posted By: tjs45
Subject: 180/185 Pre-Cleaner Question ?
Date Posted: 21 Feb 2026 at 4:32pm

I have a 180 I'm restoring and it has the large hole in the hood where the pre-cleaner would have went with no bolt holes, and I have a later serial #12500 180 parts tractor that had a pre-cleaner mounted on the hood.

My old Microfiche shows the 180 without a pre-cleaner on the hood, and the 185 had the hood mounted one? I'm guessing that later serial number 180's had the pre-cleaner mounted to the hood, but does anyone know how the earlier ones without the mounting holes in the hood were setup? Did they have a small pre-cleaner behind the grill mounted right to the air filter housing?

Thanks for any insight!

Replies:

Posted By: DrAllis
Date Posted: 21 Feb 2026 at 5:00pm

Without trying to connect all the dots from the summer of 1967 at the release of the One-Eighty, to the very last 185 at some time in 1981, I think it goes like this: the pre-cleaner extension above the hood was an option, not standard equipment, at least on the early One-Eighty's. It may have become standard equipment on the 185's, or it still may have been an option. On a gas One-Eighty, it would have been an option for sure. Any of those models that didn't have the pre-cleaner above the hood, didn't have anything behind the grille screen. Just a short stack on the air cleaner filter body. Nothing else.

Posted By: ranger43
Date Posted: 21 Feb 2026 at 7:54pm

Agree with Dr. Allis. I actually believe it was an option all of the way through the 100 series. I had a 175 diesel with and one without. The one without had a "factory" cover over the hole on the hood. Under the hood it was the same filter housing, filter, etc. just nothering connected to the T coming off the filter housing.