JD 445 transmission sealant recommendations

[Mr Mower Man]

I took the brake arm plate off the transmission of this JD 445 to replace a hardened and leaky o-ring (I think every o-ring in the whole thing is like that), and I need some sealant reapplied to the plate. Any recommendations as to what to use? I could just use the stuff I always use for Hydro-Gear transmissions, but if there's something you JD experts out there would recommend more highly, I'm all ears. Thanks!

[KE4AVB]

According to the service manual, the JD service techs are to use TY15130 form a gasket and TY6305 Cure Primer. Most likely they are using Permatex Ultra Grey and Permatex 24163 Surface Prep Activator for Anaerobics, just package in propriety packaging for JD so they can charge more for them. They also use Permatex Blue thread lock (TY9370) on all the cap screws.

I personally use the Surface prep here and it does cleans a lot better, help the sealer to adhere, and cure properly. Before I started using it rocker cover that I sealed, even the surfaces where cleaned, would still not seal properly. Another problem I found was even with the surface prep things needed to cure at least 12-24 hrs after finger tightening the mounting screws after which they are torque to specs. Oils if allowed to touch the sealer before it is fully cured will prevent it from curing properly. To keep from wasting the surface prep apply with a cotton swab. Even surfaces that looks clean will show contaminates on the cotton swab so you need change them out as clean the surface.

The hydraulic oil used is J20D (TY22062).

This is what I use on those hard to seal Kohler Courage single rocker covers. Either the Ultra Grey or Ultra Black as they color match better. I personally use the Ultra Black for engines most times and Ultra Grey for transaxles. A couple weeks I did a Kubota RTV900 HST seal replacement that use the Ultra Grey.

Note: Many of the auto part stores here never heard of the surface prep so I get mine through Amazon.

[Mr Mower Man]

According to the service manual, the JD service techs are to use TY15130 form a gasket and TY6305 Cure Primer. Most likely they are using Permatex Ultra Grey and Permatex 24163 Surface Prep Activator for Anaerobics, just package in propriety packaging for JD so they can charge more for them.

Thanks!

The TY6305 supersedes to PM37509 and is $16.56/4.5 oz. can. Whereas the Permatex 24163 is $17.64 on Amazon for the same size can. I went ahead and ordered it and the silicone gasket maker (TY15130 supersedes to PM37463) for $3.12. I should have them both later today.

[hanz63]

I've been using the Right Stuff on the Courage engines w/ the primer. It's more like the Loctite in the bulletin.