Komatsu 830E Shop Manual page 11

The KOMATSU Model 830E Truck is an electric
drive, off-highway, rear dump truck whose gross
vehicle weight is 850,000 lbs. (385 553 kg) (240 -
255 ton nominal payload).
ENGINE
This Model 830E Truck is powered by a Komatsu
SDA16V160 diesel engine rated at 2500 hp (1864
kW) @ 1900 RPM. The radiator, engine, alternator,
and blower are mounted on a separate subframe to
provide fast, easy removal and installation of the
power module.
ALTERNATOR (G.E. GTA-26)
The alternator is mounted in-line with the engine. The
alternating current (AC) output of the alternator is
rectified to direct current (DC) and sent to the wheel
mounted DC drive traction motors.
BLOWER
The dual impeller, in-line blower supplies cooling air
for the alternator, rectifiers, and both traction motors.
The air is exhausted to atmosphere through the
wheel motors.
WHEEL MOTORS
Traction motors located within each rear wheel struc-
ture receive electrical energy from the alternator. The
two traction motors convert electrical energy back to
mechanical energy through built-in gear trains within
the wheel structure. The direction of the drive motors
is controlled by a forward or reverse hand selector
switch located on a console in the cab to the right
side of the operator.
POWER STEERING
The Komatsu truck is equipped with a full time power
steering system which provides positive steering
control with a minimum of effort by the operator. The
system includes a nitrogen-charged accumulator
which automatically provides emergency power if the
steering hydraulic pressure is reduced below an
established minimum.
A02063
MAJOR COMPONENT DESCRIPTION
Major Component Description
OPERATOR'S CAB
The Operator's Cab has been engineered for opera-
tor comfort and to allow for efficient and safe opera-
tion of the truck. The cab contains an integrated
ROPS and is fully insulated to reduce noise and
vibration. The tinted safety-glass windshield and side
windows provide excellent visibility. The seat is a
comfortable, adjustable suspension seat, the steer-
ing wheel provides tilt and telescoping adjustments
and controls are mounted within easy reach of the
operator. The instrument panel provides the operator
with instruments and gauges that are necessary to
control and monitor the truck's operating systems
and is marked with international symbols for easy
identification of functions.
DYNAMIC RETARDING
Dynamic retarding is used to slow the truck during
normal operation or control speed coming down a
grade. The dynamic retarding ability of the DC elec-
tric system is controlled by the operator by depress-
ing the foot operated retarder pedal and/or setting
the RSC (Retarder Speed Control) on the instrument
panel. Dynamic Retarding is automatically activated
if truck exceeds the overspeed setting.
BRAKE SYSTEM
The braking system consists of an all hydraulic actu-
ation system. Depressing the brake pedal actuates
wheel-speed single disc front brakes and armature-
speed dual disc rear brakes. The brakes can also be
activated by operating a switch on the instrument
panel. The brakes will be applied automatically if sys-
tem pressure decreases below a preset minimum.
SUSPENSION
®
HYDRAIR II suspension cylinders located at each
wheel provide a smooth and comfortable ride for the
operator and dampens shock loads to the chassis
during loading.
A2-1