Electrical Control Cabinet - Komatsu 830E Shop Manual

The following pages illustrate the electrical control cab-
inet and components located inside the cabinet and the
control cabinet junction box located on the rear of the
cabinet (Figure 2-37). All contactors and the reverser in
this control cabinet are electrically operated - no air
supply is required.
The retarding grid package (retarding grids and blower)
and the retarding grid contactor box are shown in Fig-
ure 2-38.
This information should be used in conjunction with
applicable electrical schematics and checkout proce-
dures when troubleshooting the electrical system.
NOTE: The illustrations shown are typical of various
truck models. Actual components installed on the truck
will vary depending on the truck model and optional
equipment installed.
Components in the electrical control cabinet and other
areas of the truck are identified with abbreviated name
labels. These abbreviations also appear on schematics
and may be referenced in checkout procedures. Refer
to the list of abbreviations at the end of this section for
a full name description.
E02016 2/02

ELECTRICAL CONTROL CABINET

Electrical Propulsion Components
This system is capable of developing high voltage.
Use caution when working with the system.
Some of the components on the cards are sensitive
to static electricity. To prevent damage, it is recom-
mended that a properly connected ground strap be
worn whenever removing, handling or installing a
card. It is also recommended that after a card has
been removed, it is carried and stored in a static
proof bag or container.
NOTE: There are no adjustment potentiometers on the
control cards. Cards should not be removed during
troubleshooting unless it has been determined that a
card is at fault.
E2-65