Construction and other equipment - front transmission seal, 645 payloader

Print Page | Close Window

front transmission seal, 645 payloader

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=156873
Printed Date: 19 Aug 2025 at 11:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: front transmission seal, 645 payloader

Posted By: darrel in ND
Subject: front transmission seal, 645 payloader
Date Posted: 01 Jan 2019 at 6:45pm

My son's 645 Allis payloader developed a bad leak at what appears to be the output shaft to the front end. Can't see much due to the park brake assembly being right there. Before we tear into it, is there anything out of the ordinary there? Anything more to it than just a seal? Thanks, Darrel

Replies:

Posted By: Jim.ME
Date Posted: 01 Jan 2019 at 7:03pm

It has been years since I replaced one so I took a look at the Minnpar parts books to refresh my memory. It should be straight forward. Once the drive shaft and brake are out of the way; one nut and the flange comes off. The seal is right there. It seals on the flange so it will be easy to put a Speedi-sleeve on the flange if needed.

Posted By: darrel in ND
Date Posted: 02 Jan 2019 at 5:36am

thanks Jim. Darrel

Posted By: darrel in ND
Date Posted: 02 Jan 2019 at 9:20pm

Jim, could I possibly get the part number for that seal from you....? If you can get it, thanks, darrel

Posted By: Jim.ME
Date Posted: 02 Jan 2019 at 10:05pm

I looked at the parts books on Minnpar's site. It looks like seal # 3044462 is the one for both front and rear. The same seal was in both of the 645 parts books and the 645B books as well. I didn't find a cross to the 3044462 during a quick check on line. I found a cross to SKF 25661 by using 73044462, they said it was a Fiat-Allis seal. The SKF crosses to a National 415988. Best I can do for you, no guarantee its right.