Changing Transmission Oil and Filter (X370, X390, and X394)

1. Park machine safely on a level surface. (See Parking Safely in the SAFETY section.)

2. Remove mower from machine.

3. Transmission is divided into two internally connected cavities. Front drain plug (A) will drain hydrostatic side and rear drain plug (B) will drain differential gear side.

   
   MXAL46014-UN-09APR13

   View from front of machine.

   Place drain pan under drain plugs (A) and (B). Remove plugs.

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4. Avoid damage! Contamination can damage the hydraulic system. Clean thoroughly around reservoir fill cap before opening.

   
   MXAL46015-UN-09APR13

   Clean area around transmission fill cap (C) on transmission oil reservoir (D).

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5. Remove fill cap to improve drainage. Allow to drain completely.

6. Replace transmission hydraulic filter:

   1. 
      MXAL46016-UN-09APR13

      Remove cap (E) from front side of transmission using a 3/8 in. ratchet.

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   2. 
      MXAL46412-UN-05APR13

      Remove and discard transmission filter (F).

   3. Install new filter with spring (G) toward access cap. Install and tighten cap.

7. Install and tighten transmission drain plugs.

8. 
   MXAL46018-UN-09APR13

   Shown with fill cap installed

   Add approximately 2.3L (2.4 qt) (X370), 2.8 L (3.0 qt) (X390, X394) John Deere Low Viscosity Hy-GardHy-Gard™ (J20D) to transmission reservoir (D) until oil level is at FULL mark. Install reservoir fill cap.

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9. Start engine.

10. Check for leaks around drain plugs and hydraulic filter.

11. Operate machine forward and in reverse several times.

12. Park machine safely on level surface. (See Parking Safely in the SAFETY section.)

13. Wait at least 3 minutes for hydraulic oil to cool.

14. Check oil level in reservoir. Add oil to reservoir if necessary.