Return to the Tractors Forum | Post a Follow-Up

change hydra fluid in Eaton 750 hydramatic transmission

Posted by richard48367 10 (My Page) on
Fri, Jul 19, 13 at 18:22

anyone have any tips on how to change the fluid in this transmission.

Follow-Up Postings:

RE: change hydra fluid in Eaton 750 hydramatic transmission

Hydramatic or hydrostatic? former is a trade name for automotive transmissions; latter is a transmission type used in lawn/garden tractors, among other things. Pls advise.
If it IS a L&G tractor app we are talking about here, would also help if you would supply the make and FULL model number from off it's ID plate so that we may be able to chase down detailed specs.....

RE: change hydra fluid in Eaton 750 hydramatic transmission

Thanks for clarification. It is a hydrostatic in a 38" gravely lawn tractor. Although the tractor bears the gravely name, I think it was built by Ariens. I will try to find the ID plate. The Gravely manual does not cover changing the fluid. It mentions to keep the fluid at a certain level in the expansion tank. The Eaton 750 was superceded by a 751 model. I cannot find any info on the Eaton site. I know for sure the 750 and any parts is no longer available.

RE: change hydra fluid in Eaton 750 hydramatic transmission

RE: change hydra fluid in Eaton 750 hydramatic transmission

I just did this on my Simplicity which shares the chassis and transmission with yours. Here is what I posted to Simplicity forum I frequent.

I found an easy way to change the hydro fluid on my 12.5LTH. Here is what I did over the weekend:

1 - warm up the fluid by driving around a bit
2 - open front hood for access to the reservoir
3 - there are 2 hoses connected to the reservoir, hose A at the bottom, hose B connected to side of the reservoir
4 - disconnect both and place hose B to the bottom nipple of reservoir
5 - connect hose A to a vacuum source - MityVac(used for auto brake bleeding) is what I used
6 - keep reservoir filled with fresh oil and draw out old fluid through the vacuum device

In normal operation hose A is connected to a port at the bottom side of the transmission. Hose B to the top side. What I did was used that circuit to draw out the old fluid from bottom and let the new fluid fill in from the top. Using this method there is no need to burp the transmission as there is no air introduced during the fluid change.

I did the fluid change with 30W oil twice, once before and once after hauling 4000lbs of mulch. I plan to do this once a year as it's so simple to do.

RE: change hydra fluid in Eaton 750 hydramatic transmission

Very clever . . . that's how they change out transmission fluid in cars. Very good tip

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Tractors Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here