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00 Index and foreword
Foreword, safety and general information
Foreword, safety and general information
Important safety notice (Hybrid)
Important safety precautions
• Appropriate servicing and repair are extremely important to ensure safe operation of the machine. The
shop manuals describe the effective and safe servicing and repair methods recommended by Komatsu.
Some of the servicing and repair methods require use of special tools designed by Komatsu for special
purposes.
• The symbol mark k is indicated for such matters that require special precautions. The work indicated
with this warning mark should be performed according to the instructions with special attention. Should a
hazardous situation occurs or be anticipated during such work, be sure to keep safe first and take every
necessary measures.
Precautions peculiar to hybrid machine
This machine is equipped with the hybrid
k
k
system consisting of an electric motor and a
diesel engine. The above Hybrid mark is
attached to each explanation peculiar to the
hybrid system (contents different from those
for the common diesel engine machine). Be
sure to read the Operation and Maintenance
Manual, "Introduction", "Safety", "Handling
hybrid components and high voltage wiring
harness" in this manual, and Structure and
operation, "Hybrid system" (Chapter 10) to
understand the hybrid system.
The persons who engage in the installing or
k
k
removing work of the hybrid devices (motor-
generator, capacitor, inverter, electric swing
motor) must follow the local Industrial Safety
and Health Law concerning electricity.
Never disassemble the hybrid devices for
k
k
quality assurance. The hybrid devices and
high-voltage wiring (orange color) must be
replaced in a unit.
Before handling a hybrid device, be sure to
k
k
discharge the capacitor. For details see
Testing and adjusting, "Capacitor discharge
procedure" (Chapter 30).
When handling the hybrid devices or high-
k
k
voltage wirings, be sure to follow "Handling
hybrid components and high voltage wiring
harness".
00-16
(ALL-0370-001-A-00-A)
(HB380-1120-012-A-00-A)
When handling the hybrid devices or high-
k
k
voltage wirings, you are required to look into
the charge level inspection window on the
contactor box at the top of the capacitor and
check that the LED display indicates that the
capacitor is discharged. Before discharging
the capacitor, check the indicating function
of this LED according to the following
procedure.
1. Both LEDs light up 1 minute after the
engine is started.
2. Only 1 LED lights up after the starting
switch is turned to OFF position. (When
the starting switch is turned to OFF
position, 1 LED goes off.)
If the above cannot be confirmed while no
failure is occurring in the hybrid system, the
LED display function of showing the charge
level of the capacitor may be defective. In
this case, replace the capacitor according to
"Precautions
adjusting".
Safety points
• Good arrangement
• Correct work clothes
• Observance of work standard
• Practice of making and checking signals
• Prohibition of operation and handling by
unlicensed workers
• Safety check before starting work
• Wearing protective goggles (for cleaning or
grinding work)
• Wearing shielding goggles and protectors (for
welding work)
• Good physical condition and preparation
• Precautions against work which you are not
used to or you are used to too much
(Rev. 2013/04)
for
normal
testing
HB215LC-2
and
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