Rock to Road

Equipment Roads & Bridges
Komatsu releases the GD655-6 motor grader


March 27, 2015
By Rock to Road

Topics

komatsu-gd655-6March 27, 2015 – Komatsu America Corp. announced the introduction of the GD655-6
motor grader. Featuring 218 net horsepower (163 kW), the GD655-6 is powered by
a Komatsu SAA6D107E-3 engine that is EPA Tier 4 Final emissions certified.

komatsu-gd655-6March 27, 2015 – Komatsu America Corp. announced the introduction of the GD655-6
motor grader. Featuring 218 net horsepower (163 kW), the GD655-6 is powered by
a Komatsu SAA6D107E-3 engine that is EPA Tier 4 Final emissions certified.

  

Standard features on the GD655-6 include a Turbo II
precleaner, independent blade lift float, front mounted work lights, and a
toolbox with lock. Also standard on the grader are 10 control valves, which
means two extra valves with linkage for additional attachments. In addition,
the GD655-6 has provisions for ripper and grade control installations.

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Work Equipment and Hydraulics

A closed-center, load sensing (CLSS) hydraulic system with a
variable displacement pump supplies flow and pressure only when required,
resulting in less heat and fuel usage. Direct acting control valves designed
and built by Komatsu provide an outstanding operator “feel” and predictable
system response.  A circle slip clutch
for added reliability comes standard, as well as greaseless circle wear plates
for extra durability. Improvements to the front frame, circle, and draw bar
provide increased structural strength and durability.

 

Efficient Operation

The GD655-6 features Komatsu’s dual-mode transmission designed
and built specifically for Komatsu motor graders. This drive train incorporates
a powershift transmission with eight forward speeds and four reverse speeds,
coupled to the SAA6D107E-3 engine by both a torque converter and a direct drive
lock-up clutch. This design gives operators the best of both worlds: direct
drive delivers high travel speeds and lower fuel use and the torque converter
delivers increased tractive effort and fine control at lower speeds. The
driveline provides on-the-go, full power shifting as well as inching
capabilities and automatic shifting in the higher ranges.  Engine stall prevention is controlled
electronically and automatically by disengaging the lock-up clutch (switching
to torque converter mode) when handling heavy loads.

 

Thanks to the new Komatsu SAA6D107E-3 engine, owners and
operators can expect to burn 5% less fuel in “power mode” and 15% less in
“economy mode”, compared to the previous model. An auto idle shutdown feature
also comes standard. It curbs fuel consumption and service meter reading by
turning off the engine after an idle-time interval set by the operator.

 

The GD655-6 features the longest wheelbase in class at 21’4”.
Despite the long wheelbase, the GD655-6 maintains a turning radius of 24’3”.

 

Operator Environment

The large, low profile cab of the GD655-6 provides a
comfortable and quiet work environment. 
The ROPS/FOPS certified, hexagonal cab provides excellent visibility to
the work equipment.  Operators can tilt
the center control console forward or backward to simplify entry and exit.  An auxiliary input to connect media devices
and two 12-volt ports also have been added.

 

A new, high resolution 7” LCD monitor offers enhanced
capabilities and displays information in multiple languages for global support.
Through the monitor, the operator can easily modify settings such as the Auto
Idle Shutdown or reversing hydraulic fan, check operational records, such as
driving history or fuel/DEF consumption and monitor the Komatsu Diesel
Particulate Filter (KDPF). The operator can also view tips for cutting fuel
consumption from the ECO Guidance function via the monitor. A rear-view camera
with separate 7” LCD monitor comes standard and mounts above the front
windshield for operator convenience.

 

Convenient Maintenance and Serviceability

Large, hinged, lockable doors are standard and provide easy
access to all daily service check points. 
The tandem oil check port is conveniently located at the end of the
tandem.  The battery box and master
disconnect switch have been relocated to prevent dust accumulation inside the
box. The GD655-6 has ground level fuel and DEF access to make refueling easy.
The DEF tank features an external sight gauge to prevent overfill and spillage.
The GD655-6 is equipped with a standard reversible cooling fan to purge debris
from the coolers. Dust boots have been added to the control valve spools for
additional protection from environmental concerns.

 

The machine is equipped with Komatsu EMMS (Equipment
Management Monitoring System), an enhanced diagnostic tool that allows operator
and technicians to better monitor, maintain, troubleshoot and repair the
machine in less time.

 

The GD655-6 is also equipped with the latest KOMTRAX remote
monitoring technology with data access via the web or via KOMTRAX Mobile on a
smart phone.  In addition to providing
data such as fuel levels, operating hours, location, cautions and maintenance
alerts, KOMTRAX now also monitors DEF levels, ambient air temperatures and
pressures. A new Operator Identification System reports key information for
multiple operators and the Auto Idle Shutdown function improves operating costs
by reducing unnecessary idle time.