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Service Transmission


Hydraulic Reservoir


MX22354 TCU18915

Do not drill on the rear frame tube; the frame also serves as the hydraulic reservoir.

Hydrostatic Transmission and Hydraulic Oil



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

IMPORTANT: Avoid damage! Only use a quality oil in this transmission. Do not mix any other oils in this transmission. Do not use BIO–HY–GARD® in this transmission. Do not use “Type F” (Red) Automatic Transmission Fluid in this transmission.


The following oil is preferred:

• JD Plus 50 15W-40

The following oil is also recommended:

• SAE 15W-40

The following oil is allowable:

• JD Plus 50 0W-40 Synthetic

Oil must meet the following:

• API Service Classification SG or higher

Checking Transmission Hydraulic Oil Level

IMPORTANT: Avoid damage! Prevent contamination of hydraulic oil. Do not open the hydraulic oil reservoir caps unless absolutely necessary.

Do not overfill oil reservoir. Oil expands during operation and could overflow.


1. Park machine safely. (Refer to Parking Safely in SAFETY section.)


MX32012

2. Remove dipstick cap (A) on filler tube (B) at left side of machine and wipe dipstick with a clean rag.

3. Replace dipstick in tube and let cap rest on top of tube without engaging threads for accurate measurement.

4. Remove dipstick and check oil level, reading should be between the ADD and FULL marks. Add oil as necessary to bring level to FULL mark on dipstick.

5. Install dipstick.

Changing Hydraulic Oil and Filter

1. Park machine safely. (See to Parking Safely in SAFETY section.)


MX22472

2. Place container under drain plug (A) located at the bottom of the machine frame at the rear of the machine.

3. Remove drain plug and drain hydraulic oil.

4. Replace drain plug. Tighten to 47.5 N•m (35 lb-ft).

5. Place container under hydraulic oil filter (B).

6. Remove any debris from the area around the filter, then remove the filter.

7. Clean the filter mounting surface of any foreign material.

8. Lightly lubricate the O-ring on the new filter with clean hydraulic fluid and pre-fill the oil filter with new hydraulic oil.

9. Install the filter until the O-ring contacts the filter base, then tighten an additional 3/4 turn, by hand pressure only.

10. Remove drain container.

11. Add 7.6 L (2.0 gal) of hydraulic fluid at the filler neck on the left side of the machine and install the dipstick.

12. Start the engine.

13. Engage operator presence levers to move the machine briefly in forward and reverse to circulate the hydraulic oil, and shut the engine off.

14. Check the hydraulic oil level and add oil, if necessary, to bring the level to the FULL mark on the dipstick.

Checking and Adjusting Neutral Switch Position

c CAUTION: Avoid injury! Do not attempt this adjustment unless you are a qualified and properly trained technician. Improper adjustment can result in an unsafe machine.

Check Neutral Switch Adjustment

c CAUTION: Avoid injury! Engine exhaust fumes contain carbon monoxide and can cause serious illness or death.

Move the machine to an outside area before running the engine.

Do not run an engine in an enclosed area without adequate ventilation.

• Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area.

• Allow fresh outside air into the work area to clear the exhaust fumes out.

1. Start engine.

2. Release operator presence levers.


MX22355

3. Slowly move the speed control lever (A) forward from the back (B) of the console opening a distance of 12 mm 2 mm (0.63

If properly adjusted, engine will shut off. If not, adjust neutral switch.

Adjust Neutral Switch

1. Start engine.

c CAUTION: Avoid injury! The machine may fall or slip from an unsafe lifting device or supports, injuring anyone beneath it.

• Use a safe lifting device rated for the load to be lifted.

• Lower machine onto stable supports and block front wheels before servicing.

2. Raise rear of machine so drive wheels are off the ground and support with stable supports.

3. Move the speed control lever to the NEUTRAL position. Operator presence levers must be released.


MX22356

4. Loosen neutral safety switch (C) located under the console.

5. Push switch up and down within slots so that switch plunger deactivates when speed control lever is moved 12 mm (1/2 in.) from console opening.

6. Tighten the safety switch hardware carefully.

7. Repeat neutral switch test. If further adjustment is required, repeat adjustment procedure. If adjustment is correct, stop engine, remove supports and lower machine.

Checking and Adjusting Speed Control Lever Neutral Position

c CAUTION: Avoid injury! Do not attempt this adjustment unless you are a qualified and properly trained technician. Improper adjustment can result in an unsafe machine.

Check Neutral Adjustment

c CAUTION: Avoid injury! Engine exhaust fumes contain carbon monoxide and can cause serious illness or death.

Move the machine to an outside area before running the engine.

Do not run an engine in an enclosed area without adequate ventilation.

• Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area.

• Allow fresh outside air into the work area to clear the exhaust fumes out.

1. Start engine.

2. Move throttle to the FAST position and allow hydraulic oil to circulate for two minutes.

3. Pull up steering control levers and engage neutral locks.

4. Unlock park brake.

If drive wheels begin to creep, adjust neutral position.

Adjust Neutral Position

1. Start engine.

c CAUTION: Avoid injury! The machine can fall or slip from an unsafe lifting device or supports.

• Use a safe lifting device rated for the load to be lifted.

• Lower machine onto jack stands or other stable supports and block wheels before servicing.

2. Raise rear of machine so drive wheels are off the ground and support the traction drive unit with stable supports.


MX22357

3. Adjust tracking gap (A) to 35 mm (1-3/8 in.). Measurement is taken between the two plates (B) and (C).

4. Move speed lever to full forward.


MX22348

Picture Note: Left side shown.

5. Move control handles and engage both thumb locks (H).

6. Loosen hardware (D) retaining both left and right lever bearings (E) so that they can slide up and down in slots in the handles.

7. Turn jam nuts (F) back off of both the left and right turnbuckles (G). Jam nuts are located on both ends of each turnbuckle.

8. Adjust both left and right turnbuckles so that both tires start to rotate forward.

9. Turn the turnbuckles in the opposite direction until the tires start to creep in reverse, noting how many turns between.

10. Reverse the direction of the turnbuckle, turning the turnbuckle half as many turns as you previously noted. Both tires should now be in neutral.

11. Secure both the top and bottom jam nuts for each turnbuckle.

12. With the speed control lever still in neutral position, push both roller bearings down in slot until they rest on cam. Secure both bearings (E) in place with hardware (D).

13. Turn engine off.

14. Remove stable supports, lower unit and adjust tracking as necessary with tracking knob.

Adjusting Transmission Drive Belt Tension

IMPORTANT: Avoid damage! Due to belt stretching, the tension on the transmission drive belt should be adjusted after the first 25 hours of use.

Do not over tension the drive belt. Excess belt tension can cause transmission damage.

Inadequate drive belt tension can cause loss of traction drive.



MX32065

Picture Note: Transmission drive belt guard removed for photo clarity.

1. Loosen tension idler mounting hardware (A) using 13 mm wrench.

2. Slide tension idler (B) in slot until belt (C) is snug.

3. Tighten hardware.

Replacing Transmission Drive Belt

c CAUTION: Avoid injury! Prevent injury from moving parts. Stop engine and remove key before adjusting or servicing the machine.


MX22385

1. Remove rear carriage bolts (A) and lock nuts from hydrostatic pump securing drive belt guard (B).

2. Remove cap screws and nuts (C) and remove debris guard (D).


MX32064

3. Remove primary deck belt (E) from clutch sheave (F).

4. Disconnect clutch harness electrical connector (G).

5. Loosen nut (H) on traction drive idler (I) with 13 mm wrench.

6. Slide idler in slot to remove tension from transmission drive belt (J).

7. Loosen clutch anti-rotation bolt (K) with 13 mm wrench and slide bolt out of clutch flange.

8. Remove transmission drive belt from sheaves and replace with new belt.

IMPORTANT: Avoid damage! The clutch anti-rotation hardware also secures one of the belt guides. Be sure that the belt guide is positioned properly and that a 5 mm (0.2 in.) gap exists between the belt and the guide before tightening the hardware.


9. Insert clutch anti-rotation hardware through slot in clutch flange and tighten hardware. Make sure that clutch is allowed to move freely within slot after tightening hardware.

10. Slide tension idler in slot until belt feels snug, then tighten hardware.

Removing Hydraulic Suction Screen

c CAUTION: Avoid injury! Escaping fluid under pressure can penetrate skin and cause serious injury, including gangrene.

• Relieve pressure before disconnecting hydraulic or other pressurized lines.

• Use a piece of cardboard to search for leaks. Do not expose hands or body to high pressure fluids.

• Tighten all connections before applying pressure.

IMPORTANT: Avoid damage! Contamination of hydraulic fluid could cause transmission damage or failure. Do not open oil reservoir cap unless absolutely necessary.

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


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

2. Allow engine and hydraulic oil reservoir to cool.

3. Using a safe lifting device and jack stands, lift the front of the machine up to direct oil to the rear of the machine. Remove the drain plug located at the rear of the machine and allow oil to drain completely.

4. Install drain plug and tighten to 43-57 N•m (32-42 lb-ft.)

5. Remove hydraulic oil filter and discard.

6. Fill new hydraulic oil filter with correct oil to help prevent air from being forced through the system.

7. Install new oil filter.


MX32116 MX22379

8. Loosen hydraulic suction line (A) at charge pump (B) and disconnect suction line at elbow fitting (C) in suction port.

9. Remove elbow fitting (C) from suction port.

IMPORTANT: Avoid damage! Be careful not to damage suction screen when removing from suction port.



MX22285

10. Remove suction strainer using a 1/2 in. hex wrench (D).


MX22286

11. Clean screen (E) until all debris is visibly removed.

IMPORTANT: Avoid damage! Do not over-tighten suction screen in suction port.


12. Install the suction strainer as shown.


MX32116 MX22379

13. Install elbow fitting (C) onto suction port. Do not fully tighten at this time.

14. Connect hydraulic suction line (A) to elbow fitting (C) and charge pump (B). Tighten both ends of hydraulic suction line to 66-72 N•m (49-53 lb-ft).

15. Tighten elbow fitting to frame to 58-80 N•m (43-59 lb-ft).

16. Fill hydraulic reservoir with recommended oil.

17. Remove jack stands and lower machine.

18. Start engine.

19. Verify machine operates correctly and check for hydraulic leaks.