Sight glasses
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=152247
Printed Date: 15 Dec 2025 at 7:50am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Sight glasses
Posted By: Johnwilson_osf
Subject: Sight glasses
Date Posted: 19 Jul 2018 at 9:45pm
Greetings all,
Was doing some work on the tractors today (8050), and had trouble seeing the oil level in the rear end. The sight glasses were dirty, so it was hard to see the oil. I found a plug of the same size as a spare sight glass I have, so I unscrewed the top one, and capped the hole.
I then cleaned the glass so it was clear. Glass was dirty/hazy. After it was cleaned, I placed it back in, and was back to business.
I assume the haze in the glass is just materials that are in the sump, and have not gone through the filter yet. Also, do people clean those regularly, or does regular transmission filter changes keep your glasses clean/clear? I replace my trans filters every year, so I am keeping up with that. Perhaps just using lots of implements is bringing in contaminants?
Thank you,
John
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Allis Express: Eastern PA on Rt 80
8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2
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Replies:
Posted By: Hurst
Date Posted: 19 Jul 2018 at 10:03pm
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I always clean mine when I replace the oil in the sump. Sometimes I pull them when I fill up and use them as level plugs.
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: jiminnd
Date Posted: 19 Jul 2018 at 10:04pm
I think the glass just gets dirty from years, don't think the filter change will help that at all.
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1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner)
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Posted By: Tbone95
Date Posted: 20 Jul 2018 at 7:05am
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I always have a heck of a time seeing oil in there or not. I've given up trying, I take out the top glass, add oil until it just starts to show up in the hole.
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Posted By: Creek Jenkins
Date Posted: 20 Jul 2018 at 8:27am
In our radiators we sometimes use the round sight glasses with the plate behind the glass and the ball between the plate and the glass. The ball rolls around and keeps the glass and plate relatively clean. Might work for oil too.
cheers,
Creek
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Have spacesuit, will travel
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