John Deere

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

Engine Warranty Maintenance Statement

Avoid Fumes

Engine Oil

Checking Engine Oil Level

Changing Engine Oil and Filter

Cleaning Air Intake Screen and Pump Drive Belt Compartment

Cleaning Engine Blower Fan

Checking and Cleaning Air Filter Elements

Checking Spark Plugs

Cleaning Engine Oil Cooling Fins (Model 757)

Cleaning Engine Cooling Fins

Adjusting Carburetor

Replacing Fuel Filter

Service Transmission

Service Steering & Brakes

Service Mower

Service Electrical

Service Miscellaneous

Troubleshooting

Storage

Assembly

Specifications

Warranty

John Deere Quality Statement

Service Record

All Manuals Close Window

Service Engine


Engine Warranty Maintenance Statement

Maintenance, repair, or replacement of the emission control devices and systems on this engine, which are being done at the customers expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be performed by an authorized John Deere dealer.

Avoid Fumes

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

Move the vehicle 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.

Engine Oil


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

The following oils are preferred:

· John Deere TURF-GARD®

· John Deere PLUS-4®

The following oils are also recommended, based on their specified temperature range:

· SAE5W-20

· SAE40

· SAE30

· SAE10W-30/SAE10W-40

Other oils may be used if above John Deere oils are not available, provided they meet one of the following specifications:

· API Service Classification SF, SG, SH or SJ

Checking Engine Oil Level

IMPORTANT: Avoid damage! Failure to check the oil level regularly could lead to serious engine problems if oil level is low:

· Check oil level before operating.

· Check oil level when the engine is cold and not running.

· Keep level between the FULL and the ADD marks.

· Shut off engine before adding oil.


NOTE: Check oil twice a day if you run engine over 4 hours in a day.

Make sure engine is cold when checking engine oil level.

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

2. Allow engine to cool.

3. Clean area around dipstick prior to removing it.


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4. Remove dipstick (A). Wipe it clean.

5. Install dipstick.


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6. Remove dipstick and check oil level. Oil level should be between "low" (B) and "high" (C) marks on dipstick.

· If oil is low, add oil to bring oil level no higher than the "H" high mark on dipstick.

· If oil level is above the "H" high mark, drain to proper level.

IMPORTANT: Avoid damage! To prevent extensive engine wear or damage, always maintain the proper engine oil level. Never operate the engine with the oil level below the add mark or over the full mark.


7. Install dipstick.

MODEL

Oil Capacity With Filter

737

1.4 L (1.5 qt)

757

1.4 L (1.5 qt)


Changing Engine Oil and Filter

c CAUTION: Avoid injury! Help prevent serious personal injury. Allow the engine, exhaust pipe and muffler to cool before performing this service function.

IMPORTANT: Avoid damage! Change the oil more often if the vehicle is used in extreme conditions:

· Extremely dusty conditions.

· Frequent slow or low-speed operation.

· Frequent short trips.


1. Run engine to warm oil.

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


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3. Put container under drain tube (C).

4. Open drain valve (B).

5. Allow oil to drain into an oil drain pan.

6. After oil drains, close drain valve.

7. Remove oil filter (A). Turn filter counter-clockwise to remove.

8. Apply a film of clean engine oil on gasket of new filter.

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


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10. Clean area around the oil fill cap (D) and oil dipstick (E).

11. Unscrew and remove the oil fill cap.

12. Add approximately 1.4 L (1.5 qt) of oil.

13. Install and tighten oil fill cap.

14. Start engine and run at slow throttle for approximately two minutes. Check for leaks around filter and drain plug.

15. Stop engine.

16. Check oil level:

· Remove and wipe oil dipstick clean with a rag.

· Install dipstick.


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· Remove dipstick and check oil level. Oil level must be between the "low" (F) and "high" (G) marks on dipstick. Add oil if needed.

17. Install dipstick.

Cleaning Air Intake Screen and Pump Drive Belt Compartment

c CAUTION: Avoid injury! Avoid 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.

IMPORTANT: Avoid damage! An obstructed air intake screen can cause engine damage due to overheating. Keep the air intake screen area and other external surfaces of the engine clean at all times.


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

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


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3. Remove grass and debris from pump drive belt compartment (B).

4. Clean air intake screen (A) with a rag brush or compressed air.

5. Lower seat.

Cleaning Engine Blower Fan

c CAUTION: Avoid injury! Avoid 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.


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3. Remove four screws securing air intake screen (A).

4. Clean blower fan with a rag, brush or compressed air.

5. Replace air intake screen and install four screws to secure it to engine.

6. Lower seat.

Checking and Cleaning Air Filter Elements

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

IMPORTANT: Avoid damage! Dirt and debris can enter the engine through a damaged filter element:

· Do not wash paper element.

· Do not attempt to clean paper element by tapping against another object.

· Do not use pressurized air to clean element.

· Replace element only if it is very dirty, damaged or the seal is cracked.


NOTE: It may be necessary to check the air filter more frequently if operating vehicle in dusty conditions.

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


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2. Loosen air cleaner cover retaining knob (A) and remove the cover (B).


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3. Inspect foam precleaner (C) without removing.


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4. If foam precleaner is dirty, carefully remove from filter, leaving paper element (D) in the air cleaner housing:

· Wash foam precleaner in a solution of warm water and liquid detergent. Squeeze out excess water in a dry cloth until precleaner is completely dry. (Do not wring.)

IMPORTANT: Avoid damage! A damaged paper element can allow dirt into the carburetor and can cause poor engine performance, engine damage or failure:

· Do not attempt to clean paper element by tapping against another object.

· Replace element only if very dirty.

· Do not use pressurized air to clean element.

· If element is damaged or the seal is cracked, replace.


5. Inspect and replace paper filter element only if damaged or very dirty.


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6. Remove element cover wing nut (E) and cover (F) and remove paper element.

7. Install cleaned foam precleaner and new paper element.

8. Install element cover and wing nut.

9. Install air cleaner cover and retaining knob.

Checking Spark Plugs

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

IMPORTANT: Avoid damage! Do not clean spark plugs with abrasives.


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

2. Clean area around both spark plugs.


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3. Disconnect the spark plug wire (A) from each plug.

4. Remove and inspect spark plugs:

· Clean each plug and check for damage, replace if necessary.

· If plugs are in good condition, check gap.


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5. Check and adjust spark plug gap (B) to 0.75 mm (0.030 in.).

6. Install spark plugs.

· Tighten to 22 N·m (16 ft-lb).

7. Install both spark plug wires.

Cleaning Engine Oil Cooling Fins (Model 757)

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.

IMPORTANT: Avoid damage! To ensure proper cooling, keep the engine oil cooling fins and other external surfaces of the engine clean at all times. Operating the engine with obstructed cooling fins could cause engine damage due to overheating.


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

2. Locate engine oil cooler on right side of the engine.

3. Remove grass and debris.


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4. Clean engine oil cooling fins (A) with a rag, brush, or compressed air.

Cleaning Engine 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.

IMPORTANT: Avoid damage! To ensure proper cooling, keep the engine cooling fins and surrounding area clean at all times. Operating the engine with obstructed cooling fins could cause engine damage due to overheating.


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

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


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3. Remove four screws (A) holding shroud to engine.

4. Remove spark plug wire (B) from each engine spark plug.

5. With compressed air, thoroughly clean grass buildup and debris from the following areas:


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· Head cooling passage behind engine shroud (C).


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· Remove shrouds (D) on both sides of engine to clean behind each spark plug access hole.

· Area (E) on the right side of the engine.


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· Area (F) on the rear and left sides of the engine.

6. Install engine shroud.

7. Install spark plug wires.

8. Lower seat.

Adjusting Carburetor

NOTE: Carburetor is calibrated by the engine manufacturer and is not adjustable.

If engine is operated at altitudes above 1829 m (6,000 ft), some carburetors may require a special high altitude main jet. See your John Deere dealer.

If engine is hard to start or runs rough, check the troubleshooting section of this manual.

Possible engine surging will occur at high throttle with transmission in "N" neutral and mower engagement lever disengaged. This is a normal condition due to the emission control system.

After performing the checks in the troubleshooting section and your engine is still not performing correctly, contact your John Deere dealer.

Replacing Fuel Filter

c CAUTION: Avoid injury! Fuel vapors are explosive and flammable:

· Do not smoke while handling fuel.

· Keep fuel away from flames or sparks.

· Shut off engine before servicing.

· Cool engine before servicing.

· Work in a well-ventilated area.

· Clean up spilled fuel immediately.

IMPORTANT: Avoid damage! When installing a new fuel filter, the filter arrow must be pointed in the direction of the fuel flow.


NOTE: Change filter when fuel is low.

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

2. Allow engine to cool.


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3. Slide hose clamps (A) away from fuel filter (B).

4. Place a drain pan under hoses to catch any fuel that may be left in the hoses.

5. Disconnect hoses from fuel filter.

6. Install new fuel filter.

· Make sure fuel filter is installed with arrow pointing in direction of fuel flow.

7. Connect hoses to new fuel filter.

8. Install hose clamps.