Preparation
1. Check injection start angle.
2. Check the condition of the injectors.
3. Check:
- air supply path (is the air filter clogged);
- preheating system; engine oil and coolant levels.
4. Place the shift lever in neutral position. Apply the parking brake.
5. Turn off the air conditioner, lights and all additional electrical equipment.
6. Warm up the engine to normal operating temperature.
7. Connect a tachometer for diesel engines.
8. Accelerate the engine two or three times and then check the idle speed. It should lie in the range of 700-750 min-1 (800 min-1 with the air conditioner on).
9. If the speed is not within the specified range, adjust it with the adjusting screw. After adjustment, fix the screw securely with the locknut.