Electrical System (24 Vdc Non–Propulsion) - Komatsu 930E-2 Shop Manual

ELECTRICAL SYSTEM (24 VDC NON–PROPULSION)
24 VDC ELECTRIC SUPPLY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2
ELECTRICAL SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-1
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-1
Battery Charging Alternator (Refer to Section "M")
BATTERY SUPPLY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-3
Battery Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-3
Battery Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-3
System Battery Starter Disconnect Relay . . . . . . . . . . . . . . . . . . . . . . D2-3
Battery Disconnect Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-4
24 VDC Auxiliary Battery Connectors . . . . . . . . . . . . . . . . . . . . . . . . D2-4
Battery Equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D2-5
24 VDC ELECTRICAL SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . D3
PASSENGER SEAT BASE COMPARTMENT . . . . . . . . . . . . . . . . . . . . . . . . . D3-1
5 Minute Idle Timer Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-1
Alarm Indicating Device (A.I.D. System) . . . . . . . . . . . . . . . . . . . . . . . . . D3-3
ELECTRICAL INTERFACE CABINET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-6
TRUCK CONTROL INTERFACE PANEL (TCI) . . . . . . . . . . . . . . . . . . . . . . D3-6
Diode Board (DB1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-8
Diode Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-8
Relay Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-9
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-9
Body Up switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-13
Hoist Limit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-14
Circuit Breaker Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D3-15
NOTE: Electrical system wiring hookup and electrical schematics are located in Section "R" of
this Manual.
DANGEROUS VOLTAGE LEVELS ARE PRESENT WHEN THE TRUCK IS RUNNING AND CON-
TINUE TO EXIST AFTER SHUTDOWN IF THE REQUIRED SHUTDOWN PROCEDURES ARE NOT
FOLLOWED.
Before attempting repairs or working near propulsion system components, the following
precautions and truck shutdown procedure must be followed:
•
DO NOT step on or use any power cable as a handhold when the engine is run-
ning.
D01033
SECTION D
INDEX
Index D1-1