Power Mode - Hitachi ZAXIS 450LC-3 Operator's Manual

POWER MODE

One of three engine speed modes, E, P or H/P mode, can be
selected using power mode switch (1).
• E (Economy) Mode
Even if the engine speed is reduced in the E mode, digging
force remains unchanged from that in the P mode. Although
production is reduced slightly more than in the P mode, the
fuel consumption and noise levels are reduced, allowing the
machine to operate most efficiently.
• P (Power) Mode
Operate the machine in this mode when performing normal
work.
• H/P (High Power) Mode
d
WARNING: In the H/P mode, the engine speed will
change quickly. To ensure safety, be sure to turn
power mode switch (1) to the P or E mode position
before starting such works as loading the machine
on or off a trailer or lifting a load with the front
attachment, which may result in personal accidents if
the engine speed is suddenly changed.
When rolling in the arm while digging deep trenches for
example, more power may be required. In such cases, use
the H/P mode. The maximum power of the machine can be
utilized in this mode, increasing work efficiency when more
power is required than in the P mode.
The H/P mode is activated and the engine speed is
increased when the boom raise or the arm rolled-in
operation is made with the engine fast idle speed set at
1650 min ± 50.
-1
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NOTE: In the H/P mode, the engine speed changes
depending on load applied to the machine.
OPERATING THE MACHINE
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M1U1-01-015