Farm Equipment - 170 Fuel Line Fittings

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170 Fuel Line Fittings

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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=167250
Printed Date: 04 Nov 2025 at 1:01am
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Topic: 170 Fuel Line Fittings

Posted By: Mapleshade
Subject: 170 Fuel Line Fittings
Date Posted: 09 Jan 2020 at 11:25am

I have removed the fuel pump on my 170 diesel because it was leaking fuel out the lower fitting and oil out the gasket. I will be putting on a new pump and the line from the tank to the pump but am confused about the proper line fittings. The old line is copper and has just a single flare at the end. There is a rubber piece between the flare and the nut. At the top of the fuel pump the fitting has what looks like a furl on the line with the rubber and then the nut. Neither line looks right to me. I have searched but can’t find any photos or info. Can anyone clear this up for me? My other 170 is gas and it has normal double flare ends on the line.

Replies:

Posted By: DougG
Date Posted: 09 Jan 2020 at 7:05pm

That's how most are put together, I'd replace the rubber pieces as they crack and leak air, go to a diesel shop tho , .30 cents compared to Agcos $4.25 a piece!

Posted By: Mapleshade
Date Posted: 12 Jan 2020 at 8:32am

Doug thanks for the reply and the info on a diesel shop. I went to a diesel expert a couple of towns away and he graciously gave me his time, advice, a bunch of the rubber seals and a couple of fuel filter housings. The threads in one of my housings are not great.

Barry

Posted By: SteveM C/IL
Date Posted: 12 Jan 2020 at 4:14pm

Yeah those lines have a slight swell on the end and a rubber ferrule under the nut. They actually work quite well.