Farm Equipment - B Oil Breather Cap Stuck

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B Oil Breather Cap Stuck

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=172089
Printed Date: 19 Jul 2025 at 11:45pm
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Topic: B Oil Breather Cap Stuck

Posted By: MotorCityBear
Subject: B Oil Breather Cap Stuck
Date Posted: 16 Jun 2020 at 9:11pm

1953 B that has been “neglected” a bit while life got in the way. Finally getting to it.

Before cleaning the carb out, which it needs, I drained the engine oil and installed a new oil filter.

Went to add the new oil and the breather cap appears to be frozen in place. I tried WD-40, a hammer, small oil filter wrench etc. but this thing is not budging. I am thinking I will need to remove the valve cover and hammer the cap from the underside.

Do you guys have any other suggestions for getting the breather cap freed up?

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Rob
1953 AC B
Kubota L3901
Blairsville, GA

Replies:

Posted By: steve(ill)
Date Posted: 16 Jun 2020 at 9:28pm

I had one like that... used 16 inch adjustable pipe pliers..... didnt look to good when it finally came off.

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Like them all, but love the "B"s.

Posted By: MotorCityBear
Date Posted: 16 Jun 2020 at 9:46pm

kinda what I am thinking. I guess I should order the new breather cap now, since it may not survive the “removal process.”

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Rob
1953 AC B
Kubota L3901
Blairsville, GA

Posted By: Sugarmaker
Date Posted: 17 Jun 2020 at 5:53am

Rob,

Yes it is probably rusted in place. Removing the valve cover and trying to tap it out upside down sounds like it might work too!

Post some pictures.

Regards,

Chris

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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.

Posted By: CTuckerNWIL
Date Posted: 17 Jun 2020 at 8:55am

Use a strap wrench on it. Turn it back and forth as much as possible to loosen things up. if that fails, twist it off any way you can and replace it.

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http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF