Farm Equipment - D17 Series III transmission cover plate leak

Print Page | Close Window

D17 Series III transmission cover plate leak

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=142549
Printed Date: 08 Sep 2025 at 4:45pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D17 Series III transmission cover plate leak

Posted By: Smiling John
Subject: D17 Series III transmission cover plate leak
Date Posted: 17 Sep 2017 at 1:03pm

I have an oil leak on the right side of the transmission. It is the seal on a plate on the right side of the transmission behind the brake pedals that the oil lines to and from the hydraulic fluid filter go through. i do not know what is behind it, so will I have any difficulty reinstalling the plate if I remove it to replace the seal? Thanks.

Replies:

Posted By: Acdiesel
Date Posted: 17 Sep 2017 at 5:24pm

just two steel lines with o-rings that go into that plate from the transmission side

you can clean the two mating surfaces and make a gasket or use a thin bead of silicone.

-------------
D19 Diesel,D17 Diesel SER.3
2-D14, 2-D15 SER.II WF/NF
D15 SER.2 DIESEL
D12 SER.I, D10 Ser.II
2-720'S D21 Ser. II

Gmc,caterpillar
I'm a pharmacist (farm assist) with a PHD (post hole digger)

Posted By: Smiling John
Date Posted: 18 Sep 2017 at 10:37am

Thank you ver much Acdiesel

Posted By: DrAllis
Date Posted: 18 Sep 2017 at 10:59am

It will probably take 3/4" line wrenches to loosen those nuts. There's not much swinging room for a wrench and platform removal helps if needed. DO NOT cross thread the lines when reassembling.