24 VDC ELECTRICAL SYSTEM COMPONENTS
PASSENGER SEAT BASE
COMPARTMENT
The 24 VDC electrical system components shown in
Figure 3-1 are accessed by unlatching the passenger
seat base lid and tilting the passenger seat forward.
The electrical schematics in Section R should be used
when troubleshooting problems with the following
components.
Do not attempt repairs until the truck is properly
shut down. Dangerous voltage levels are present
in the propulsion system while the engine is run-
ning and for a period of time after shutdown. Refer
to Section D Index for additional warnings.
TRUCK SHUTDOWN PROCEDURE
1. Reduce the engine speed to idle. Place the selec-
tor switch in NEUTRAL and apply the parking
brake. Be certain the parking brake applied indi-
cator lamp in the overhead panel is illuminated.
2. Place the drive system in the REST mode by
turning the Rest switch on the instrument panel
ON. Be certain the REST warning lamp is illumi-
nated.
3. Shut down the engine using the keyswitch. If, for
some reason the engine does not shut down, use
the shutdown switch on the center console.
4. Verify the LINK VOLTAGE lights on the electrical
cabinet and next to the the DID panel in the cab
are OFF. If they remain on longer than 5 minutes
after shutdown, the propulsion system must be
inspected by a technician trained to investigate
the cause.
5. Place the GF Cutout Switch in the CUTOUT posi-
tion throughout test and troubleshooting proce-
dures. (See Figure 3-1, page E3-2, Propulsion
System, for switch location.)
6. Verify the steering accumulators have bled down
by attempting to steer.
COMPONENTS
TAIL LIGHT RESISTOR DIODE ASSEMBLIES
The tail light resistor diode assembly RD1, RD2 (2,
Figure 3-1) is a circuit designed to vary the intensity of
each of the stop/tail lamp bulbs.
With the tail lights on, a resistor in series with the lamp
reduces voltage supplied to the lamp, thereby reducing
the lamp intensity. When the service brakes are applied
and the stop lights are activated, current flows from the
stop light relay, through a diode, bypassing the resistor
and applies 24 VDC to the lamp filament.
RD1 controls the left lamp and RD2 controls the right
lamp. No adjustments are available or necessary.
5 MINUTE IDLE TIMER COMPONENTS
The 5 minute idle timer circuit automatically provides
approximately 5 minutes engine idle time before actual
engine shutdown occurs. This system allows the en-
gine cooling system to circulate coolant to reduce and
stabilize engine component temperatures, when en-
gine power requirements are minimal, resulting in ex-
tended engine life.
The circuit is controlled by a 3-position rocker switch.
Pressing the bottom of the switch will turn the circuit
OFF. The engine will shut down by use of the Key
Switch, console mounted Engine Shutdown Switch, or
the Ground Level Shutdown Switch.
With the rocker switch in the middle position, the circuit
is ON, but does not activate the 5 minute idle timer
circuit. The engine can be shut down immediately
using any one of the three switches described above.
When the top of the switch is depressed and held
momentarily, the idle timer circuit is activated. When
released, the switch will return to the ON (middle)
position, and the 5 minute idle timer circuit is latched
on through the switch. The engine will not shut down
with the Key Switch. Moving the Key Switch to the OFF
position, will cause the engine to shut down after the 5
minute time delay is completed. The normal shutdown
sequence will then occur.
However, if during the 5 minute idle timing sequence,
the 5 minute delay switch (on the instrument panel) is
pressed to the OFF position, the console shutdown
switch is depressed, or the Ground Level Shutdown
switch is activated, the engine will shut down immedi-
ately, followed by the normal shutdown of all systems.
D03019 04/01
24VDC System Components
D3-1
Summary of Contents for 930E-2
Page 1: ......
Page 2: ......
Page 4: ...NOTES ...
Page 8: ...KOMATSU MODEL 930E Dump Truck A 4 Introduction A00017 03 01 ...
Page 10: ...NOTES A1 2 Index A01001 2 94 ...
Page 12: ...930E MAJOR COMPONENTS A2 2 Major Component Description A02055 ...
Page 35: ...START HERE Walk Around Inspection A03017 General Safety and Operating Instructions A3 21 ...
Page 46: ...NOTES A3 32 General Safety and Operating Instructions A03017 ...
Page 78: ...NOTES B1 2 Index B01016 ...
Page 88: ...NOTES B3 6 Dump Body B03013 03 01 ...
Page 92: ...NOTES B4 4 Fuel Tank B04015 ...
Page 94: ...NOTES C1 2 Index C01021 03 01 ...
Page 118: ...NOTES C5 6 Air Filtration System C05013 5 98 ...
Page 126: ...NOTES D2 6 24VDC Electric Supply System D02018 ...
Page 142: ...NOTES D3 16 24VDC System Components D03019 04 01 ...
Page 146: ...FIGURE 2 1 PROPULSION SYSTEM DIAGRAM E2 2 Electrical Propulsion System Components E02014 3 01 ...
Page 196: ...NOTES E2 52 Electrical Propulsion System Components E02014 3 01 ...
Page 240: ...NOTES E3 44 AC Drive System Electrical Checkout Procedure 3 01 E03015 Release 17 Software ...
Page 242: ...NOTES G1 2 Index G01017 ...
Page 250: ...NOTES G2 8 Tires and Rims G02015 ...
Page 274: ...NOTES H1 2 Index H01013 04 01 ...
Page 282: ...NOTES H2 8 Front Suspensions H02013 2 01 ...
Page 288: ...NOTES H3 6 Rear Suspensions H03013 ...
Page 334: ...NOTES J3 32 Brake Circuit Component Service J03019 1 99 ...
Page 378: ...NOTES L2 8 Hydraulic System L02028 ...
Page 401: ...FIGURE 4 5 FLOW AMPLIFIER VALVE L04031 Steering Circuit L4 7 ...
Page 403: ...FIGURE 4 6 FLOW AMPLIFIER NO STEER L04031 Steering Circuit L4 9 ...
Page 405: ...FIGURE 4 7 FLOW AMPLIFIER LEFT STEER L04031 Steering Circuit L4 11 ...
Page 407: ...FIGURE 4 8 FLOW AMPLIFIER RIGHT STEER L04031 Steering Circuit L4 13 ...
Page 409: ...FIGURE 4 9 FLOW AMPLIFIER NO STEER EXTERNAL SHOCK LOAD L04031 Steering Circuit L4 15 ...
Page 414: ...NOTES L4 20 Steering Circuit L04031 ...
Page 422: ...NOTES L5 8 Steering Control Unit L05021 ...
Page 429: ...L06021 Steering Circuit Component Repair L6 7 ...
Page 450: ...NOTES L6 28 Steering Circuit Component Repair L06021 ...
Page 466: ...NOTES L7 16 Hoist Circuit L07023 ...
Page 492: ...NOTES L9 6 Hydraulic System Filters L09008 ...
Page 504: ...NOTES L10 12 Hydraulic Check out Procedure L10012 ...
Page 508: ...NOTES M1 2 Index M01034 03 01 ...
Page 518: ...NOTES M2 3 10 Ansul Checkfire Electric Detection and Actuation System M02003 ...
Page 524: ...NOTES M5 4 Wiggins Quick Fill Fuel System M05002 10 96 ...
Page 532: ...NOTES M8 8 Special Tools M08012 9 99 ...
Page 560: ...NOTES M9 28 Air Conditioning System M09010 6 97 for HFC 134a Refrigerant ...
Page 618: ...M20 20 Payload Meter II M20007 10 00 ...
Page 619: ...M20007 10 00 Payload Meter II M20 21 ...
Page 627: ...M20007 10 00 Payload Meter II M20 29 ...
Page 634: ...NOTES N1 2 Index N01020 03 01 ...
Page 654: ...NOTES N3 6 Cab Components N03011 7 98 ...
Page 660: ...NOTES N4 6 Operator Comfort N04020 ...
Page 686: ...NOTES N5 26 Operator Cab Controls N05044 ...
Page 688: ...NOTES P1 2 Index P01024 ...
Page 691: ...P02034 Lubrication and Service P2 3 ...
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Page 737: ...NOTES R1 2 930E Schematics R01048 with Cummins QSK60 Series Engine ...
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