Farm Equipment - Final drives pan gasket/RTV?

Print Page | Close Window

Final drives pan gasket/RTV?

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=32851
Printed Date: 01 Jun 2025 at 2:33am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Final drives pan gasket/RTV?

Posted By: CB-Man
Subject: Final drives pan gasket/RTV?
Date Posted: 25 Jun 2011 at 12:00pm

When draining the final drives i think the manual says there is a cork gasket in there. Is it best to get a replacement gasket or just use RTV sealant?

Replies:

Posted By: GregLawlerMinn
Date Posted: 25 Jun 2011 at 12:15pm

I use new cork gaskets; readily available at your AGCO dealer (or Sandy Lake Implement/Dean Ag). Use a non hardning sealer (RTV) on the pan side then you are ready to change the fluid next time.

-------------
What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC

Posted By: Jeff Z. NY
Date Posted: 25 Jun 2011 at 12:20pm

Either or. They both work.
Your choice.

If you use RTV put a good bead on so when the pan is bolted up it spreads even with no voids.

Posted By: wkpoor
Date Posted: 25 Jun 2011 at 1:33pm

Another RTV trick is to barely tighten the bolts with you fingers. Just enough to spread the sealant. Then the next day after it has cured do the final torque. That way you will be able to put pressure on the form in place gasket. If you torque up right away the seal will depend on adhesion only.

Posted By: David Maddux
Date Posted: 26 Jun 2011 at 7:09am

I have started using the grey RTV and the instructions is to finger tight , then 1 hour later tighten. My problem is to comeback 1 hour later. My memory is not the best.

Posted By: wkpoor
Date Posted: 26 Jun 2011 at 8:18am

Don't worry about the hour, next day is better anyhow.

Posted By: CB-Man
Date Posted: 26 Jun 2011 at 10:02am

Thanks for the tips guys, I wanted to get this done this weekend and really didnt want to order a pan gasket. I will get some grey RTV and do what you mentioned.

Thanks alot

Brian

Posted By: Gerald J.
Date Posted: 26 Jun 2011 at 10:22am

In my VW manual where a lot came from the factory with RTV beaded in place they note a common detail. Always pass a bolt hole with the bead on the oil side of the surface, not outside the bolt, else the bolt will leak.

Gerald J.

Posted By: Jeff Z. NY
Date Posted: 26 Jun 2011 at 10:26am

So that's why my neck is always wet.
The bolts in my neck are leaking.

Posted By: CB-Man
Date Posted: 26 Jun 2011 at 11:53am

That is true. I worked as a mechanic in dealerships for 4-6 years. When ever I do differential covers I always lay the bead to the inside oil side then go back and make a full circle around the bolt.

Posted By: Bill_MN
Date Posted: 26 Jun 2011 at 10:57pm

I used Permatex 81182 Gear Oil RTV sealant on the finals of my WD last summer, got it from NAPA. I would suggest going that route as it gives you a positive seal compared to dry cork, and as little as you change gear oil anyway it's not that big a deal to disassemble.

-------------
1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow

Posted By: B26240
Date Posted: 27 Jun 2011 at 7:14am

I like the RTV system also, the cork wasn't that great to start with

Posted By: Coke-in-MN
Date Posted: 27 Jun 2011 at 7:48am

Laying out the bead on the surface and then smooth it out well so there is a thin even film, then wait about 15 to 20 minutes for it to skin but not full cure , this has worked well for me .

Seems a lot of users run a bead like they are calking a window then tighten it up which makes a mess as the excess fallis into sealed area and migrates into fluid and bearings.

-------------
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: Jeff Z. NY
Date Posted: 27 Jun 2011 at 8:32am

You have to use common sense on the size of the bead. If you spread it out too thin then when it is compressed sometimes it leaves a void.

Posted By: Jeff Z. NY
Date Posted: 27 Jun 2011 at 8:43am

This is also a good choice.

http://www.permatex.com/products/automotive/automotive_gasketing/gasket_makers/auto_permatex_ultra_black_maximum_oil_resistance_rtv_silicone_gasket_maker.htm

Posted By: Jeff Z. NY
Date Posted: 27 Jun 2011 at 8:45am

http://www.amazon.com/Permatex-82180-Maximum-Resistance-Silicone/dp/tech-data/B0002UEN1U

Posted By: Tripp
Date Posted: 27 Jun 2011 at 8:45am

Black RVT Silicone gaqsket maker.