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Service Transmission


Gear Case Oil

Use the following oil viscosity based on the air temperature range. Operating outside of the recommended oil air temperature range may cause premature gear case failure.

IMPORTANT: Avoid damage! ONLY use a quality oil in this gear case. DO NOT mix any other oils in this gear case. DO NOT use BIO–HY–GARD® in this gear case.


The following John Deere gear case oil is preferred:


MIF

• GL-5 GEAR LUBRICANT®—SAE 80W-90

Other gear case oils may be used if recommended John Deere gear case oil is not available, provided they meet the following specification:

• API Service Classification GL–5.

Checking Front Axle Oil Level

IMPORTANT: Avoid damage! Allow oil one hour to settle before checking level to ensure accurate dipstick reading. Repeat oil level check after several hours of operation.


1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow machine to cool down for at least one hour.

IMPORTANT: Avoid damage! Dirt and debris in oil may cause damage to the transaxle. Clean area around opening before removing dipstick.



MX17456

2. Loosen and remove dipstick (A) located on right side of front axle.

3. Wipe dipstick clean with a rag. Install and tighten dipstick.

4. Remove dipstick. Oil level should be between high and low levels on dipstick. If oil level is low:

a. Add GL-5 Gear Lubricant®—SAE 80W-90 or equivalent through dipstick fill opening until oil level is correct.

b. Install and tighten dipstick.

5. Check front axle oil level again after the first several hours of operation.

Changing Front Axle Oil

1. Operate machine to warm front axle oil.

2. Park machine safely. (See Parking Safely in the SAFETY section.)


MX22562

3. Position drain pan under differential drain plug (A).

4. Remove differential drain plug and allow oil to drain.

5. Position drain pan under axle drain plug (B) on both sides of front axle.

6. Remove axle drain plugs and allow oil drain.

7. Install and tighten drain plugs (A) and (B) after all oil has drained.

8. Remove dipstick located on right side of front axle.

9. Add recommended gear case oil through dipstick fill opening until oil level is correct.

10. Install and tighten dipstick.

IMPORTANT: Avoid damage! Allow oil one hour to settle before checking level to ensure accurate dipstick reading. Repeat oil level check after several hours of operation.


11. Check front axle oil level.

Transmission and Hydraulic Oil

IMPORTANT: Avoid damage! Transaxle is filled with John Deere HY-Gard® (J20C) transmission oil at the factory. DO NOT mix oils.




Do not use type “F” automatic transmission fluid.

Use Hy-Gard® (J20C) or Low Viscosity Hy-Gard (J20D) transmission oil.

John Deere Low Viscosity Hy-Gard transmission oil is specially formulated for operation below -18provide maximum protection for the hydraulic system.

Use oil viscosity based on the expected air temperature range during the period between oil changes.

IMPORTANT: Avoid damage! Use recommended oil only. Do not use engine oil or “Type F” automatic transmission fluid.


Other oils may be used if they meet John Deere standard JDM J20D or J20C.

Checking Transmission Oil Level

1. Park machine safely. (See Parking Safely in the SAFETY section.) Fully lower any implements.

2. Allow machine to cool down for at least one hour.


MX35688

3. Check oil level in sight glass (A) at rear of transaxle case. Oil level should be at 3/4 of sight glass, or a bubble should be seen in the glass.

IMPORTANT: Avoid damage! Help prevent dirt and other contaminants from entering the transmission. Clean area around fill cap before removing.

Do not overfill transmission. Oil expands during operation and could overflow.



MX23702

4. If oil level is low:

• Remove filler cap (B).

• Add recommended oil through fill opening until oil level is correct.

5. Install and tighten filler cap.

Changing Transmission Oil and Filter

c CAUTION: Avoid injury! Touching hot surfaces can burn skin. The engine, components, and fluids will be hot if the engine has been running. Allow the engine to cool before servicing or working near the engine and components.

IMPORTANT: Avoid damage! Contamination of hydraulic fluid could cause transmission damage or failure. Do not remove cap from fill opening unless absolutely necessary.

Severe or unusual conditions may require a more frequent service interval.


1. Run engine a few minutes to warm the transmission oil.

2. Park machine safely. (See Parking Safely in the SAFETY section.)


MX35872

3. Position drain pan under the two transmission drain plugs (A). Remove the drain plugs to drain the transmission and rear axle housing.


MX35252

4. Remove quick-locking pin (B) from right side of hinge pin (C).

5. Remove two bolts and bushing (D).

6. Slide hinge pin to the left and allow sway chain linkage (E) and right draft arm (F) to drop.

7. Position a drain pan under the transmission oil strainer cover (G).


MX17484a

8. Remove and clean the four magnets (H) inside suction screen (I).

9. Clean screen and cover (C) with a mild solvent. Allow to dry.

10. Inspect O-rings (J) for damage or cracking. Replace if necessary.

11. Install four magnets (H) back into screen (I).

12. Install screen into transmission housing.

NOTE: Apply hydraulic oil to O-rings to ease assembly and prevent damage to sealing surfaces.

13. Install cover (C) into transmission housing and secure with retaining bolts.

14. Install and tighten drain plugs.

IMPORTANT: Avoid damage! Help prevent dirt and other contaminants from entering the transmission. Clean area around fill cap before removing.

Do not overfill transmission. Oil expands during operation and could overflow.



MX35071

15. Remove fill cap (K).

16. Add approximately 13 L (3.4 gal) of preferred transmission oil or equivalent into fill opening until oil level is between 1/2 - 3/4 of the sight glass.

17. Install fill cap.

18. Start engine. Check for oil leaks.

19. Stop engine.

20. Check transmission oil level. Add oil if necessary.