Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

Rear End Gearcase Oil Capacity

Recommended Posts


Rockshaver here - I'm getting ready to change out the 80-90 gear oil in the rear end gearcase of my 3415H Mfg # 759 (1972). I have been unable to find the capacity, either online, from the original owner's manual, or from the dealer. I know I can simply keep filling until it shows full at the bottom of the fill elbow, but now my curiosity is getting the best of me: does anybody out there know what the spec capacity is, and if so do you know it just from doing it or is there actually an "official" listing of the spec somewhere.

I'll get this job done whether or not I get the answer before I start, but I know all my fellow tractor junkies out there know how it is... inquiring (obsessed) minds want to KNOW!

Share this post

Link to post
Share on other sites

Yukon, thanks for the reply. This is the manual that I already have. It shows a lot of stuff, including the exploded parts drawings and maintenance procedures and schedules, but I cannot find anything that lists the capacity.

Share this post

Link to post
Share on other sites

Thanks PhanDad,

I'm satisfied that this is the right answer. I was a little unsure of it at first because the AC 300 series had been manufactured by AC in their plant down south at the time my 3415 was being made in Port Washington. I was able to trace down the fact that the hydro models in both locations were in fact using the identical transmission gearcase. You undoubtedly knew this already, so... Thanks!

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Who's Online (See full list)

    • Larrybell57
  • Today's Birthdays

    1. Chris727
      (37 years old)
    2. jdwilson
      (65 years old)
  • Recent Status Updates

    • Dean McFadden

      Dean McFadden

      Good morning peeps! I’m always searching for helpful information with my AC collection. Hope to find out new information and pass on my own experience in restoration. Here are some pics of my babies. I’m still looking for front rims for the 410 so yesterday I put the 310 wheels on took it for a drive. Working pretty good but still needs some carb work. Gotta get the 310 running next. Have a great day!😁

      · 1 reply
    • thedaddycat

      thedaddycat  »  SmilinSam

      It's in pretty sad shape, but yes I have a yellow plastic cap that I'm fairly certain is what you need. PM me your details and I'll get it out to you.
      · 0 replies
  • Adverts