Farm Equipment - Loss of brakes on a 7040

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Loss of brakes on a 7040

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=205795
Printed Date: 12 Mar 2025 at 11:53pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Loss of brakes on a 7040

Posted By: SilverShoes
Subject: Loss of brakes on a 7040
Date Posted: 10 Mar 2025 at 11:38am

Friend called said he lost his brakes on a 7040. He noted oil level is full, has hydraulics, power steering pto, basically everything except brakes. He is a state away so all I can do is ask questions. I’ve never seen this before on an a 7000/8000 series

Replies:

Posted By: DrAllis
Date Posted: 10 Mar 2025 at 12:33pm

If what he is telling you is true, there is an orifice on the inlet fitting on the brake valve. It is plugged with something. He should still have manual brakes of some kind. Verify system stand-by pressure at the JIC tee on the side of the PTO valve. Must be 300 psi MINIMUM.

Posted By: SilverShoes
Date Posted: 10 Mar 2025 at 1:12pm

Thank you, I’ll let him know. He had to check those pressures on his 7045 pto so he will be able to check the pressure there on this tractor.

Posted By: injpumpEd
Date Posted: 10 Mar 2025 at 1:22pm

Just to clarify what Doc said, the manual brake action is only at the bottom of pedal travel. Kinda like a car brake system at that point.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!