Check Accelerator Pedal Operation, And Exhaust Gas Color And Noise; Exhaust Gas Color And Noise - Hitachi ZW 550-6 Operator's Manual

Check Accelerator Pedal Operation, and Exhaust
Gas Color and Noise
--- every 10 hours (daily)
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WARNING: Move the forward/reverse switch (or
lever) to neutral. Apply the parking brake. After
resting the bucket level to the ground, block the
wheels.
While slowly stepping on accelerator pedal (1), check that
the engine speed smoothly increases. Then, while slowly
returning accelerator pedal (1), check that the engine
speed smoothly decreases.

Exhaust Gas Color and Noise:

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DANGER: Exhaust inhalation hazard. Ventilate
the shop with fresh air when carrying out warming
up warm-up operation indoor. Failure to do so may
cause asphyxiation from exhaust gas, resulting in
death or severe injury.
IMPORTANT: This machine is equipped with the
engine that meets Interim Tier 4 emission
requirements. Never attempt to modify the inlet
and exhaust system.
Exhaust gas color is normally transparent or light blue.
Although exhaust gas color slightly becomes white
immediately after the engine is started or quickly
accelerated, this symptom is not abnormal. If the
exhaust gas color turns black, white, brown, or gray,
check the engine oil level and the fuel supply system for
any abnormality. In addition, check that no abnormal
noise is heard coming from the engine or muffler.
MAINTENANCE
7-114
115Z7B-1-81-1
1