OMTCU15013

Issue L1

Mid-Mount Z-Trak®

737 and 757

PIN (010001- )

Introduction

Product Identification

Safety

Operating

Replacement Parts

Service Intervals

Service Lubrication

Service Engine

Service Transmission

Hydrostatic Transmission and Hydraulic Oil

Cleaning Hydraulic Pump Cooling Fins

Checking Hydraulic Oil Level

Changing Hydraulic Oil and Filter

Checking and Replacing Pump Drive Belt

Checking and Adjusting Motion Control Linkages

Service Steering & Brakes

Service Mower

Service Electrical

Service Miscellaneous

Troubleshooting

Storage

Assembly

Specifications

Warranty

John Deere Quality Statement

Service Record

Service Transmission

Hydrostatic Transmission and Hydraulic Oil

MX10362

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.

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

Cleaning Hydraulic Pump Cooling Fins

c CAUTION: Avoid injury! Help prevent injury from foreign particles when using compressed air for cleaning purposes, clear area of bystanders, and wear personal eye protection to guard against flying debris.

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

2. Lift and secure operator seat in the raised position.

MX10299

3. Clean hydraulic pump cooling fins (A) with a rag, brush, or compressed air.

4. Lower seat.

Checking Hydraulic Oil Level

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

2. Lift and secure operator seat in the raised position.

MX10299

3. Thoroughly clean area around reservoir fill cap (A).

4. Visually check level of fluid. Fluid level should be even with the fill line (B) on the side of the tank.

5. To add oil, remove cap from the oil reservoir tank filler neck.

6. Install cap on filler neck.

7. Lower operator seat.

Changing Hydraulic Oil and Filter

c CAUTION: Avoid injury! Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. Use caution when filling and draining hydraulic oil. During periods of machine operation the hydraulic oil reservoir can get hot. Allow engine and oil reservoir to cool before servicing.

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

2. Allow engine and hydraulic oil reservoir to cool.

3. Lift and secure operator seat in the raised position.

MX10365

4. Turn transmission oil filter (A) counterclockwise to remove.

5. Allow transmission oil to drain into a drain pan with at least a 9.5 L (2.5 gal) capacity.

6. Apply a film of clean oil on gasket of new filter.

7. Install filter. Turn filter clockwise until gasket makes contact with the mounting surface. Tighten 1/2 to 3/4 turn after gasket contact.

8. Clean area around reservoir fill cap.

MX10299

9. Remove cap (B) from the oil reservoir tank filler neck.

10. Fill oil reservoir with approximately 7.6 L (2 gal) of oil.

11. Start engine.

12. Move throttle lever to the fast position.

13. Unlock park brake.

c CAUTION: Avoid injury! Help prevent serious bodily injury. Remain alert to other people and the surroundings when operating the machine.

14. Cycle motion control levers forward and rearward several times. Check for leaks around filter.

15. Stop the engine. Check oil level. Add oil as necessary.

16. Lower operator seat.

Checking and Replacing Pump Drive Belt

c CAUTION: Avoid injury! Help prevent bodily injury due to entanglement in a belt or pulley. Stop engine and wait for all moving parts to stop.

NOTE: The transmission drive belt will not require a tension adjustment. Belt is self-adjusted using a spring tensioner.

Checking Belt:

1. Stop engine and lock park brake.

2. Lift and secure operator seat in the raised position.

MX10366

3. Inspect belt (A) for excessive wear, damage or stretching while in position on the transmission sheaves and drive belt tensioner pulley.

Replacing Belt

1. Remove belt from drive sheaves and idler pulley.

MX10364

· To make removal and installation of the belt easier, carefully move spring loaded idler (B) to the left using a pry bar.

2. Install belt onto drive sheaves and idler pulley as shown.

3. Lower operator seat.

Checking and Adjusting Motion Control Linkages

c CAUTION: Avoid injury! Do not attempt this adjustment unless you are a qualified and properly trained technician.

Checking Motion Control Linkages

NOTE: Check and adjust motion control linkages with the machine parked on a hard, level surface.

c CAUTION: Avoid injury! Engine exhaust fumes can cause sickness or death: · If it is necessary to run an engine in an enclosed area, use an exhaust pipe extension to remove the fumes. · Always try to work in a well ventilated area.

1. Start engine.

2. Set throttle lever to the fast position.

3. Unlock park brake.

4. If the rear drive wheels begin to creep, an adjustment is required.

Adjusting Motion Control Linkages

1. Stop engine and lock park brake.

MX10313

2. Move both motion control levers (A) to the neutral lock position.

3. Lift and secure operator seat in the raised position.

MX10292

4. Remove support rod (B) from side of seat frame.

· Remove cotter pin and washer (C).

5. Tilt seat forward to rest on front frame.

6. Raise rear of machine with a safe lifting device.

· Support with wood blocks or jackstands.

· Rear drive wheels must have the ability to rotate freely.

7. Activate operator seat safety switch.

NOTE: To prevent damage to the bottom of the operator seat, cover end of wood block with a rag.

· Place a wood block approximately 25-30 cm (10-12 in.) long between the foot plate and the center of the seat.

8. Start engine.

9. Set throttle to the fast position.

c CAUTION: Avoid injury! Help prevent serious personal injury when performing this service procedure. Keep hands, feet and clothing away from rotating tires.

10. Unlock park brake.

Mx10397

11. Locate left and right motion control linkages (D).

12. Move the right motion control lever into the neutral lock position.

· The right drive wheel must not turn. If it does turn, adjust the motion control linkage:

Mx10397

a. Loosen hex nuts (E) and hex nuts (G) on each side of the turnbuckle (F).

b. Adjust turnbuckle (F). Keep adjusting the turnbuckle until the wheel stops rotating completely.

c. Tighten hex nuts (E and G) against turnbuckle (F).

13. Move the right motion control lever completely rearward in the slot and release lever. The lever should return back to the neutral position (completely centered in the slot).

· The drive wheels must stop completely.If the drive wheel does not completely stop rotating, a damper mount adjustment is necessary:

· Adjust damper in slot as necessary, tighten nut to 20 Nüm (15 ft-lb).

14. Move the right motion control lever completely forward and rearward in the slot and then back to the neutral lock position.

· The drive wheels must stop completely. If the drive wheel does not completely stop rotating, repeat steps12 and 13.

15. Repeat procedure to adjust the left motion control linkage.

16. Stop engine.

17. Move both motion control levers to the neutral lock position.

18. Remove wood block from between foot plate and the operator seat.

19. Lower machine.

20. Install support rod to side of seat frame with cotter pin and washer.

21. Lower seat.