Large blade
Capacities of 18.5 m
3
24.2 yd
3
(Semi-U dozer) and 22.0 m
3
28.8 yd
3
(U dozer) yield outstanding production. High-tensile-
strength steel comprising the front and sides of the blade increase durability.
Dual tilt dozer (option)
The dual tilt dozer increases productivity while reducing operator effort.
●
Optimum blade cutting angle for all types of materials and grades can be
selected on-the-go for increased load and production.
●
Digging, hauling, and dumping are easy and smooth with less operator fatigue.
●
Dozer tilt angle and tilt speed are twice that of a conventional single tilt system.
Rippers (option)
●
The variable giant ripper features a long sprocket center-to-ripper point distance,
making ripping operation easy and effective while maintaining high penetration force.
●
The variable giant ripper is a parallelogram single shank ripper ideal for ripping tough material. The ripping angle is
variable, and the depth is adjustable in three stages by a hydraulically controlled pin puller.
●
The multi-shank ripper is a hydraulically controlled parallelogram ripper with three shanks.
Track shoe slip control system (option)
●
Eliminates the need for the operator to constantly control engine power output with the decelerator
while ripping. Operator fatigue is substantially reduced.
●
Maneuverability is improved because the operator is free to focus on the ripping application without
having to monitor the track shoe slippage.
●
Repair costs are significantly lowered and undercarriage life is prolonged with the reduction in track
shoe slippage.
●
The track shoe slip control system will contribute to lower fuel costs, because the engine output is
automatically controlled to optimum levels for operation.
7
Track shoe slip
control panel
Torque
converter
Engine
Transmission
Lockup “ON”
Lockup “OFF”
Engine
The Komatsu SAA6D170E-5 engine delivers 391 kW 525 HP
at 1800 rpm. The fuel-efficient Komatsu engine, together
with the heavy machine weight, make the D375A-5R a
superior crawler dozer in both ripping and dozing production.
The engine features direct fuel injection, turbocharger, and
air-to-air aftercooler to maximize fuel efficiency.
To minimize noise and vibration, the engine is mounted
to the main frame with rubber cushions.
Hydraulic driven radiator cooling fan
Fan rotation is automatically controlled depending on
coolant and hydraulic oil temperature, saving fuel
consumption and providing great productivity with a quiet
operating environment.
Automatic torque converter lockup system
For greater efficiency during long pushes, the lockup
mode allows the system to automatically engage the torque
converter lockup clutch. Locking up the torque converter
transmits all the engine power directly to the transmission,
increasing ground speed thus achieving efficiencies equal
to a direct drive. The result is efficient use of engine power,
less fuel consumption, and faster cycle times.
K-Bogie undercarriage system
New K-Bogie undercarriage system combines prior
advantages with new additional features.
Current features:
●
Effective length of track on ground is consistent.
Shoe slippage is minimized, resulting in higher traction.
●
The idler does not oscillate under load, providing excellent
machine balance. Blade and ripper penetration force
remains stable for increased productivity.
New features on K-Bogie undercarriage system
●
K-Bogies oscillate with two fulcrums, and track roller
vertical travel is greatly increased. Impact loading to
undercarriage components is reduced and component
durability is improved since track rollers are always in
contact with track link.
●
Undercarriage life is improved due to better control of track
chain alignment with track rollers.
●
Riding comfort is improved by reducing vibration and shock
when traveling over rough terrain.
6
P
RODUCTIVITY
F
EATURES
D375A
-5R
CRAWLER DOZER
D375A
-5R
C
R A W L E R
D
O Z E R
Fulcrum of major bogie
Fulcrum of minor bogie
