9
High-Rigidity Frame
Front support is integrated
with the frame. The frame
rigidity has been
substantially increased. As
a result, flexural rigidity and
torsional rigidity, which are
indicators of drivability and ride
quality, are significantly improved.
Komatsu Components
Komatsu manufactures the torque converter,
transmission, hydraulic cylinders, and electrical parts on this
dump truck. Komatsu dump trucks are manufactured with an
integrated production system under strict quality control
system guidelines.
Sealed DT Connectors
Main harnesses and
controller connectors are
equipped with sealed DT
connectors providing high
reliability, water resistance,
and dust resistance.
Reliable Hydraulic System
A large capacity oil cooler is installed in each hydraulic
circuit, improving the reliability of the hydraulic units during
sudden temperature rises. Further, in addition to the main
filter, a
β
10
= 3 (min) line filter is located at the entrance to
the transmission control valve. This system helps prevent
secondary faults.
Flat Face-to-Face
O-Ring Seals
Flat face-to-face O-ring
seals are used to securely
seal all hydraulic hose
connections and to prevent
oil leakage.
O-ring
Nipple
Hose
Rugged and Durable Dump Body Design
The standard dump body is made of high-tensile-strength
steel with a Brinell hardness of 400 for excellent rigidity
and reduced maintenance
cost. The side and bottom
plates of the dump section
are reinforced with ribs for
added strength.
Protection Function Supported by Electronic Control
HD1500-7
O
F F
- H
I G H WAY
T
R U C K
D
ASH
-7 F
EATURES
Item
Function
Downshift inhibitor
Even if the driver downshifts accidentally, a speed appropriate to the current gear is automatically set, limiting potential over-runs.
Over-run inhibitor
When descending grades, if the vehicle’s speed surpasses the maximum for the current gear, the front and rear brakes
automatically operate, limiting potential over-runs.
Reverse inhibitor
The vehicle is prevented from moving backward when operating the body.
Forward/Reverse shift inhibitor
This device makes it impossible to shift from forward to reverse when the vehicle’s speed surpasses 4 km/hr
2.5mph
.
Anti-hunting system
When running near a shift point, smooth automatic shifting takes place.
Neutral safety
The engine is prevented from starting when the shift lever is not in neutral.
