Weichai 6160 turbocharger used in marine diesel engine WHM6160 6170 6180 spare parts offer

1. Overview of the 170Z Series Starting System
 
The 170Z series diesel engine supports two starting modes: electric starting and compressed air starting, designed to meet different operational needs and working environments.

2. Electric Starting System

2.1 Components

The electric starting system includes:

• Battery

• Starter Motor

• Starting Relay

• Wiring and Control Switches

2.2 Working Principle

1. Turn on the battery switch.

2. Insert and switch on the ignition key.

3. Press the start button.

4. The starter motor’s solenoid coil is energized, pushing the pinion gear to engage with the flywheel ring gear.

5. The starter motor rotates the flywheel, cranking the diesel engine to start.

3. Air Starting System

3.1 Components

The compressed air starting system includes:

• Starting Air Bottle

• Air Motor

• Switch Valve

• Fittings and Piping

3.2 Working Principle

1. Open the air valve of the air bottle.

2. Then open switch valve 3.

3. Compressed air flows through the pressure reducing valve, switch valve, and oil mist device into the air motor.

4. Air pressure drives the motor blades, rotating the rotor and output shaft.

5. The output gear engages with the diesel engine flywheel, initiating startup.

6. Once the engine starts, immediately close the switch valve to stop the air supply.

4. Precautions for Electric Starting

1. Starting time must not exceed 5 seconds; release the button immediately after the engine starts.

2. Wait at least 2 minutes between restart attempts if the engine fails to start.

3. Do not press the start button again until the flywheel and pinion have fully stopped rotating.

4. If the engine fails to start three times in a row, inspect and troubleshoot the system.

5. During maintenance, ensure waterproofing of electrical components to avoid short circuits.

6. The battery must supply 24V with a capacity of no less than 195Ah, and the cable cross-section must be greater than 70mm².

5. Precautions for Air Starting

1. Clean all pipe fittings before installation to avoid blockages or motor blade damage.

2. Use Loctite 567 for sealing pipe joints.

3. Before starting, check the oil mist device to ensure it contains proper oil (32L-DAB or N32 grade) at not less than 1/3 full.

4. Never start if the oil mist device is empty.

5. Operating pressure of the air motor should be 0.7–0.9MPa; maximum allowable pressure is 1.0MPa.

6. If starting fails, the gear remains engaged for a second attempt without needing to reset.

7. Immediately close the valve after engine start to prevent gear damage.

8. The air motor must not run unloaded for long durations at working pressure.

6. Use and Safety Instructions for Starting Air Bottles

6.1 Operation Procedure

• Open air valve 3, then open the central large valve 1 to allow air to reach the switch valve.

• Once the diesel engine is running, immediately close valves 1 and 3 to stop airflow.

6.2 Air Charging Guidelines

• Inflate the bottle until pressure reaches 2.45–2.94MPa.

• At 3.29MPa, the safety valve (valve 5) will release excess pressure automatically.

• Minimum resealing pressure for the safety valve is 2.3MPa.

6.3 Bottle Placement and Connections

• The air bottle must be stored upright.

• Multiple bottles can be connected in series for larger capacity.

• The inner diameter of connecting pipes must be at least Φ12mm.

• The air motor line uses a G1 pipe, ideally shorter than 2m.

• Pipeline pressure resistance must be ≥6MPa.

6.4 Warnings & Requirements

• The safety valve (5) must not face the operator—risk of high-pressure air injury.

• Valve port 4 is used for manual inflation with a hand-held compressor when no air source is available.

• When opening the base valve, fully unscrew it to activate the reverse seal device, reducing leaks.

• A spiral tower at the bottle’s base allows draining of condensed water and dirt.

6.5 Charging Valve Operation (See Figure 3-6-4)

1. Stop fuel injection by opening the bleed screw on cylinder 1.

2. Fully open charging valve 2 and then central large valve 1.

3. Open the charging handwheel and operate the charging handle (2).

4. Stop charging when pressure reaches 2.5MPa.

5. Charging is typically performed before engine shutdown.

⚠️ Do NOT use explosive charging (i.e., charging while fuel injection is active), as this can:

• Cause valve failure

• Burst pipes and gauges

• Damage rubber seals

If possible, use an air compressor rated at 2.94MPa with 5–10m³/h output for controlled charging.

6.6 Explosion Prevention

• Install a check device on the main starting air pipeline to prevent explosions caused by valve failure.

• ⚠️ Do not remove the check device — serious safety hazard.