Oil seal replacement on VAC

I have my '50 VAC transmission completely disassembled at this moment for bearing replacement. Mine has the disk brake units, but I think it's similar to the drum brakes.

On mine, I removed the brake actuating rod and spring, then removed the large cast cover and disk plate mechanism, then slid the disk off of the differential shaft. The seal is in the next plate, the differential bearing carrier. It removes with four cap screws and then it just slides off. I suppose you could install the seal by prying the old one out and tapping a new in, but it's a lot easier if you take the carrier to the banch to work. Be sure you keep the correct number of shims from under the carrier, and put a bit grease on the gear side of the seal to lube it until gear oil can find it's way up there.

Understand that if your drum brake system is much different, some or all of these steps might not apply.

Hope this helps!

Frank

Thanks for the step-by-step process. Sounds simple enough. I'm assuming I will have to drain the grease out before doing anything. Do you happen to know the capacity and viscoscity of the grease. Is is 90-w? I have an operator's manual ordered, but do not have it yet. I've had the tractor for just a month now--sure is a fun tractor to drive. Thanks again for help.

If it's like mine when I found it, it takes 2 gallons of oil and 5 gallons of water!

Seriously, I have the service manual and the parts book , but no ops manual yet, but the service manual says the transmission capacity is 7 gallons and the torque tube is 2 gallons. 140 weight is called out. 140 is sometimes difficult to find. I can get it if I order it by the 5 gallon pail from a distributor. The thinner, more modern oils can tend to leak from old gaskets and seals. Also, in Florida here, I have warmwer conditions, so I use 140. It makes the old gears a little less noisy, too.

Frank