D1146/D1146TI/DE08TIS
MAINTENANCE MANUAL
97
Printed in Jan. 2001 PS-MMA0415-E1A
3.4. Breaking in
3.4.1. Preparations for breaking-in
¾ Fill of new engine oil through the oil filler cap.
¾ When measuring the oil level with the oil level gauge with the engine mounted, the
oil level must indicate about 10mm above the max. line.
¾ Connect water hoses and fill up cooling water.
¾ Connect the fuel hoses to the fuel tank and to top(radiator or surge tank).
Check the air bleeding of the fuel system.
¾ Connect the electrical systems such as starter, air heater, etc. with power source.
3.4.2. Operation of a new engine (Break-In)
Because the sliding surfaces of a new engine are not lapped enough, the oil film can
be destroyed easily by overload or overspeed and the engine life-time may be
shortened.
Therefore the following things must be obeyed by all means.
Up to the first 1,000km(50 hours)
▲ Engine should be run at fast idling until the temperature of the engine becomes
normal operating condition.
▲ Overload or continuous high speed operation should be avoided.
▲ High speed operation with no load should be prevented.
▲ Abrupt start and stop of the engine should be avoided.
▲ Engine speed must be under 70% of its maximum speed.
▲ Maintenance and inspection must be accomplished thoroughly.
3.4.3. Check points for break-in
During the break-in (the initial running of the engine) period, be particularly observant
as follows:
a) Check engine oil level frequently. Maintain oil level in the safe range, between the
"min." and “max." marks on dipstick.
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