Stupid Question!
 

Can someone tell me what the purpose is of the red coating inside Cub Trans axles. And has anyone tried electrolysis on a rear case, Does it eat that coating? :Pray:
-Thanks
Randy

it called Glyptal it seals the rough interior castings of engines, rear ends and electric motors. it helps keep oil clean and flowing freely.

http://www.eastwood.com/glyptal-red-...ccode=ga130060

Lots of old big machinery and equipment has that, it is to seal porosity in Cast Iron.
I would not remove it

As George said the cast iron would leak without it. All of the axles we made at Dana had that coating in it. It's pretty nasty stuff so don't mess with it.

thanks guys

I'd heard IH originally did it so they could store unfinished castings outdoors before final machining.

Good question! .... and ignorant tho I am, I have surprised myself to hear exactly the answers I'd have thought!

I am wondering if anyone here watches some of the new cable tv shows regarding restoration of collectibles? Has anyone seen an episode on cubs and such????

Your forgeting that cast iron is porous and it would leak over time. Most axle castings are stored inside. An axle is not a place where you would want dirt and worse getting into the axle casting. I inspected axles at Dana and a spec of dirt would halt the production lines. I've inspected JD cut axles to Cat axles that were 22 feet from hub to hub. Axle castings get treated very well in the world of part storage and I could not see any company that would store them out side without some sort of plastic wrapping to keep then clean and dry. If they did they would have had to be cleaned before use and that adds to cost and time.:TwoCents:

That piece of info came from someone on another forum who knows a lot more about these tractors than I do, and he probably got it from someone that worked there back in the day, as that's where most of his knowledge came from.

The insides of the Kohlers aren't painted, and they don't leak, and neither do any of the farm tractors I've worked on with un-sealed engines and/or transmission internals, so I question the validity of that statement.

I have worked on many large machinery gear cases (800 ton presses etc.) in the manufacturing industry and they were coated.
Also my JD 70 and 730 diesel are coated, as well as my IH 806 & IH 400.
so I'm thinking it is an extra step to insure a no weep casting.
I have to agree with Matt though as I don't remember seeing many engines coated, just gear cases.
Might be possible that it is a condensation problem with gear
cases as they don't operate as warm as engines do??