Farm Equipment - 7040 transmission oil low

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7040 transmission oil low

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=164542
Printed Date: 01 Nov 2025 at 2:19am
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Topic: 7040 transmission oil low

Posted By: GregStremel
Subject: 7040 transmission oil low
Date Posted: 23 Sep 2019 at 5:37pm

After baling hay. I checked the dipstick under the seat. The oil was barely on the dipstick. It took almost 2 gallons to bring it to the full mark.

I don’t remember the last time I checked the dipstick. Never had a problem so didn’t check it. My bad. I know I checked at least in May.

There is no oil on the concrete floor. The underside of the tractor is dry. No obvious leaks.

I remember reading how oil can transfer to the rear end if a seal has gone bad. I have not yet drained and measured the rear end. The top sight glass is full. Is this seal I seem to remember in the transmission or would it be separating the oil pumps?

Any help is appreciated.

Replies:

Posted By: MACK
Date Posted: 23 Sep 2019 at 8:20pm

Most times it is the seal in pump or seal on shaft that drives the pump. I always replace both. MACK

Posted By: GregStremel
Date Posted: 24 Sep 2019 at 4:12pm

Thank you.