What preventive maintenance task is essential to carry out on the lubrication system of a bus?

Question

DentroTest · Accepted Answer

The oil level is checked periodically with the dipstick, on level ground and with the engine off and cold. This verifies that it is between the minimum and maximum marks. Measuring it immediately after switching off the hot engine does not follow that procedure. Oil replacement is a different maintenance operation, whose interval is set by the manufacturer; you do not wait for the pressure warning lamp to come on in order to do it.

What preventive maintenance task is essential to carry out on the lubrication system of a bus?

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