Hydrostatic fluid

   / Hydrostatic fluid #1  

Mike S.

New member
Joined
Jun 19, 2025
Messages
1
Tractor
John Deere 400
I have jd 400 hydrostatic lawn mower is there any hydraulic fluid that is compatible with jd hydrostatic fluid???
 
   / Hydrostatic fluid #2  
Welcome to TBN
You might try some other fluids to see if they will work, but is it really worth it if they don't work the best ?

Deere knows so I trust Deere. Cheaper not worth the risk just for a few bucks, to me.
 
   / Hydrostatic fluid #3  
Does the 400 specify low viscosity hygard? If yes that might be a little harder to find an alternative fluid that meets that spec.
 
   / Hydrostatic fluid #4  
I have jd 400 hydrostatic lawn mower is there any hydraulic fluid that is compatible with jd hydrostatic fluid???

As far as I know JD400 is using the same Sundstrand 15 hydrostatic transmission as my JD300 and JD430 are and both approve use "Type F" automatic transmission fluid as an alternative to John Deere fluid.

I have been using Type F in the JD300 since 1993

Here is a page 32 from JD430 operator manual:

Snap 2025-06-28 at 11.57.19.jpg
 

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