Komatsu 830E-AC Shop Manual page 996

C1. Low Accumulator Pre-
charge Pressure
The low accumulator precharge
warning light, if illuminated, indi-
cates low nitrogen precharge for
the steering accumulator(s). To
check for proper accumulator
nitrogen precharge, the engine must be stopped and
the hydraulic system completely bled down. Turn the
key switch to the RUN position. The warning light will
not illuminate if the accumulators are properly
charged. The warning light will flash if the nitrogen
precharge within the accumulator(s) is below 7585 ±
310 kPa (1100 ± 45 psi).
If the low accumulator precharge warning light
flashes, notify maintenance personnel immedi-
ately. Do not attempt further operation until the
accumulators have been recharged with nitro-
gen. Refer to the shop manual for proper charg-
ing instructions. If nitrogen precharge pressure
is low, sufficient oil for emergency steering may
not be available.
D1. Not Used
This light is reserved for future use.
E1. Low Brake Pressure
This red indicator light indicates a
malfunction within the hydraulic
brake circuit. If this light illumi-
nates and the buzzer sounds,
stop the truck, shift to PARK,
and turn the engine off. Notify
maintenance personnel.
NOTE: Adequate hydraulic fluid is stored to allow the
operator to safely stop the truck.
N5-24
A2. Low Hydraulic Tank Level
This warning light indicates the
oil level in the hydraulic tank is
below recommended level. Dam-
age to hydraulic pumps may
occur if operation continues.
Stop the truck and turn the
engine off. Notify maintenance personnel immedi-
ately.
B2. Automatic Lubrication Sys-
tem Pressure
This amber light will illuminate if
the automatic lubrication system
fails to reach 13 790 kPa (2,000
psi) at the junction block located
on the rear axle housing within a
specified time after the lube timer initiates a cycle of
grease. To turn the light off, turn key switch OFF,
then back to ON again. Notify maintenance person-
nel at earliest opportunity after light comes on.
C2. Circuit Breaker Tripped
This amber light will illuminate if
any of the circuit breakers in the
relay circuit control boards are
tripped. The relay circuit boards
are located in the electrical con-
trol cabinet.
D2. Hydraulic Oil Filter Monitor
This amber light indicates a
restriction in the high pressure fil-
ter assembly for either the steer-
ing or hoist circuit. This light will
illuminate before filters start to
bypass. Notify maintenance per-
sonnel at earliest opportunity after the light illumi-
nates.
NOTE: The filter monitor warning light may also
illuminate after the engine is initially started if the oil
is cold. If the light turns off after the oil is warmed,
filter maintenance is not required.
Operator Controls 10/06 N05070