Yuchai YC4D60-D21 - Requirements of technical maintenance

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(3) When engine is running, do not increase load abruptly. Increase load slowly.
(4) Replace the lubricating oil when the engine runs for 50 hours. Replace the oil again
after break-in period (50 hours). Since then, oil can be replaced as required in
maintenance procedures that will be mentioned afterwards.
Requirements of technical maintenance
Maintenance
period
Items
Procedures
Daily
maintenance
1.Check the fuel level in the fuel tank.
2.Check the water level in the radiator.
3.Check the oil level in the oil sump.
4.Check if there is coolant, oil, or fuel
leakage
5.Check the tension of the driving belt.
See Chapter 5
See Chapter 5
After every 50
hours
In addition to item 1 to item 5 above,
6.Check the sureness of the bolts on cylinder
head.
7.Check the clearance of the intake and
exhaust valves. Adjust it if necessary.
8.Check the injection advance angle. Adjust
it if necessary.
9.Check the operating pressure of the
injector and check the atomization
condition.
10.Clean the inlet screen of the oil pump.
See Chapter 3
See Chapter 3
See Chapter 3
See Chapter 3
See Chapter 3