Komatsu 830E Shop Manual page 705

INDICATOR LIGHTS
Figure 5-8 illustrates the system indicator lights
located on the Overhead Display, above the opera-
tor's line-of-sight. The following describes the lamps
shown in Figure 5-8 and should be referenced by the
intersection of row locators A through E and column
locators 1 through 6. (Refer to Table I for a chart of
symbols and descriptions.)
• The AMBER (Yellow) indicator lamps are
intended to alert the operator that the indicated
truck function requires some precaution when lit.
• The RED indicator lamps alert the operator that
the indicated truck function requires immediate
action by the operator. Safely stop the truck and
shut down the engine.
DO NOT OPERATE THE TRUCK WITH A RED
WARNING LIGHT ILLUMINATED.
A1. High Hydraulic Oil Temperature (optional)
This warning light indicates
high oil temperature in the
hydraulic tank. Continued
operation could damage com-
ponents in the hydraulic sys-
tem. Refer to Section L for
hydraulic system troubleshoot-
ing and repair procedures.
Notify maintenance personnel
immediately. The light turns on at 225° F (107° C).
B1. Low Steering Pressure
When the key switch is turned
ON, the low steering pressure
warning light will illuminate until
the steering system hydraulic
pressure reaches 2100 psi
(14.7 MPa). The warning horn
will also turn on, and both will
remain on until the accumula-
tor has been charged.
During truck operation, the low steering pressure
warning lamp and warning horn will turn on if steering
system hydraulic pressure drops below 2100 psi
(14.7 MPa).
• If the light illuminates momentarily while turning
the steering wheel at low truck speed and low
engine RPM, this may be considered normal, and
truck operation may continue.
• If the light illuminates at higher truck speed and
high engine RPM, DO NOT OPERATE TRUCK.
N05056
If the low steering warning light continues to illu-
minate and the alarm continues to sound, low
steering pressure is indicated. The remaining
pressure in the accumulators allows the operator
to control the truck to a stop.
Do not attempt further operation until the mal-
function is located and corrected.
Refer to Section L for steering system troubleshoot-
ing and repair procedures.
C1. Low Accumulator Precharge Pressure
The low accumulator
charge warning lamp, if illumi-
nated, indicates a low nitrogen
precharge in the steering accu-
mulator(s). To check for proper
steering accumulator
charge:
1. Stop the engine and turn the key switch OFF to
bleed the steering accumulators
2. After approximately 90 seconds, turn the key
switch ON.
3. If the accumulators are properly charged, the
warning lamp will not illuminate.
4. If the nitrogen precharge in one or both of the
accumulators is below 1100 ± 45 psi, (7585 ±
310 kPa) the warning lamp will flash.
If the low accumulator precharge warning lamp
flashes, do not operate the truck. Investigate the
problem and repair or recharge accumulator(s)
as necessary. Sufficient energy for emergency
steering may not be available if the system is not
properly charged.
Refer to Section L for steering and accumulator sys-
tem troubleshooting and repair procedures.
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Operator Controls
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pre-
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