Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Rick3410

Sundstrand Hydrostatic transmission type U

Recommended Posts

Rick3410

I'm trying to service my Simplicity 3410 tractor hydrostatic drive. It's a Sundstrand series 15 type U transmission. I'd like to verify the oil level is correct and eventually change the oil. I can't find a good description of how to do this.

From what I can see, the only real atmosphere access to the entire unit is at the rear of the tractor on the bottom. There is a cap that can be removed on a tube (roughly 3" long) that right angles in to the drive unit.

There are also two hoses that go from the hydrostatic drive to an oil filter (I can see the name "Fram" on the filter.

So here's my questions:

1. If I remove and replace the filter, how do I replenish the fluid?

2. Is the access area at the rear of the tractor where I would fill the unit? If so,

3. how can I tell if it's topped off properly.

You guys are always a lot of help and I look forward to your advice.

Share this post


Link to post
Share on other sites
RayS

If you have a 3410H it has a Vickers unless someone else changed it to a Sunstrand. It sounds like that was the case.

The Sunstrand holds 3 quarts of oil. The oil goes into the 3" long tube. It is topped off correctly if the fluid is over flowing out the fill tube. If it has the Sunstrand there is a vent above the axle tube on the left side of the tractor. You will want that open when filling the oil reservoir.

Share this post


Link to post
Share on other sites
BLT

When you remove vent plug, make sure wiggle pin is free to move about. If it is not free, expect the possibility of oil drips on the floor.

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


  • Who's Online (See full list)

    • Chris727
    • Jay Red
  • Today's Birthdays

    1. pitt
      pitt
      (53 years old)
  • Recent Status Updates

    • Bubba1997

      Bubba1997

      Searching for a Sleeve hitch and breaking plow and other equipment if price is right and also a deck for a B1 thank you 
      · 3 replies
    • 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
  • Adverts

×