Interaxle & Differential Locking
Systems
The full-time six-wheel drive system
reduces slippage. A wet multiple-disk
interaxle clutch also locks the three axles
in unison for greater traction. The interaxle
lock and differential locks can be
switched on and off while the truck is
travelling, thereby boosting productivity.
In addition, the differential lock switch,
which is a three position switch, can
lock up the rear axle differentials only,
or all axles for
maximum
performance in the
worst conditions.
Fully Hydraulically Controlled
Wet Multiple-Disk Brakes and Retarder
Wet multiple-disk brakes have been proven on
Komatsu dump trucks and wheel loaders. They
ensure highly reliable and stable brake
performance. The large-capacity wet-multiple disk
brakes also function as a highly responsive retarder
which gives the operator great confidence while
travelling downhill.
Retarder Absorbing Capacity (continuous descent):
405 kW
544 HP
583 kW
782 HP (with optional exhaust retarder)
Large Capacity Body and Box
Section Frame Structure
The
22.3 m
3
29.2 yd
3
heaped capacity
is among the highest in its class, and
the low loading height of
2970 mm
9'9"
enables easy loading. The body is built
of thick wear-resistant steel with a
Brinell hardness of 400, and the body
shape provides excellent load stability.
Rugged enough for the toughest jobs,
the HM400's frame is designed using a
rigid box structure with high strength
low alloy steel.
Articulated Steering
Fully hydraulic articulated
steering offers
low-effort operating
performance and
maneuverability.
A minimum turning radius
of only
8.7 m
28' 7"
provides the freedom to
move about in confined areas.
Komatsu Designed Electronically Controlled
Transmission
Komatsu designed Electronically Controlled Transmission called
K-ATOMiCS has been successfully employed in Komatsu's rigid
dump trucks. The electronic clutch modulation system ensures
proper clutch pressure when the clutch is engaged. The total
control system controls both the engine and transmission
by monitoring the vehicle conditions. This high
technology system assures smooth shifts
without shock.
5
HM400-1
ARTICULATED DUMP TRUCK
4
The combination of high travel speeds and an efficient engine with low emissions
delivers maximum productivity at the lowest cost.
P
RODUCTIVITY
F
EATURES
P
RODUCTIVITY
F
EATURES
High Performance SAA6D140E-3 Engine
This engine delivers faster acceleration and
higher travel speeds with the highest horsepower
per ton in its class. Advanced technology, such
as high-pressure electronic controlled injection
system (CRI), air to air aftercooler and an
efficient turbocharger enabling the engine to suit
low emission. High torque at low speed,
impressive acceleration and low fuel
consumption ensure maximum productivity.
8.7 m
28'7"
Hydropneumatic Suspension
The hydropneumatic suspension has been proven on
Komatsu's rigid dump trucks. The front axle suspension
employs "De Dion" type design, allowing the machine to
ride more smoothly over bumps. The rear-axles are
mounted on a dynamic equalizer structure equipped
with hydropneumatic suspension. The entire vehicle's
suspension system responds
to the ground conditions.
The suspension delivers a
comfortable ride and
maximizes the productivity.
