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Standard Features
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With the longest wheel base in its class, the new GD655-6 offers exceptional fine grading performance. Even with a long wheelbase, the GD655-6 maintains a tight minimum turning radius, thanks to a maximum articulation angle of 25 degrees. This grader is extremely maneuverable and productive in tight road work or cul-de-sac applications. Thanks to the new, Komatsu designed, Tier 4 Final power plant, GD655-6 owners should see a drop in fuel consumption of up to 5% when operating in “power” mode, and up to 15% in “economy” mode, compared to the GD655-5. Komatsu’s Dual-mode transmission sets this grader apart from its competition. The Dual-mode transmission has been specifically designed for use in Komatsu motor graders. It allows operators to benefit from the low-fuel consumption and high ground speeds of a direct-drive transmission, as well as the high tractive effort, superior control at low speed, and anti-stall features of a torque converter transmission. GD655-6 Walkaround


Model Year
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408 in3 (6.69 ltr)
Fuel Tank Capacity
103 u.s. gal (390 ltr)


Speeds (Forward)
3.4 km/h ( 2.1 mph)
5.0 km/h ( 3.1 mph)
7.0 km/h ( 4.3 mph)
10.2 km/h ( 6.3 mph)
15.4 km/h ( 9.6 mph)
22.3 km ( 13.9 mph)
30.6 km/h ( 19.0 mph)
44.3 km/h ( 27.5 mph)
Speeds (Reverse)
4.5 km/h ( 2.8 mph)
9.2 km/h ( 5.7 mph)
20.3 km/h ( 12.6 mph)
40.3 km/h ( 25.0 mph)
15.4 km/h ( 9.6 mph)
22.3 km ( 13.9 mph)
30.6 km/h ( 19.0 mph)
44.3 km/h ( 27.5 mph)
Service: Foot operated, sealed oil disc brakes, hydraulically actuated on four tandem wheels.
Parking: Manually actuated, spring applied, hydraulically released caliper.


11.8 in (300 mm)
Turning Radius
24 ft.3 in (7.4 m)


8.3 in x 0.87 in (210 x 22 mm)

Standard Features

 Engine and its related items  
Standard Features  
 Accelerator and electric throttle control  
 Air cleaner double element with dust indicator  
 Air intake extension  
 Antifreeze 22 F 30C  
 Auto idle Shutdown  
 Hydraulic driven reversing cooling fan blower type plastic blade with fan guard  
 Engine Komatsu SAA6D107E 3 145 to 218 VHP EPA Tier 4 Final certified turbocharged and air air after cooled  
 Fuel line pre filter  
 KDPF After Treatment Assembly Consisting of KDOC and KCSF  
 Secondary Engine Shutdown Switch  
 Selective Catalytic Reduction SCR System  
 Electrical system  
 Alarm backup  
 Alternator 140 Ampere 24V  
 Batteries Extreme duty 2 x 12V 1146 cca each  
 Battery disconnect switch  
 Dome light cab  
 Headlights 2 halogen type front bar mounted  
 Horn electric  
 Indicator lights Battery chargeBlade float Brake oil pressure Cooling fan reverse mode Differential lock Differential oil temperature Dual power mode economy and power Engine oil pressure Engine RPM set Lift arm lock Lights high beam Parking break Transmission system electrical circuit  
 Lights backup stop directional  
 Starter 5.5kW  
 Working light front 4 and rear 2  
 Working light 4 cab mounted flood type  
 Operator environment  
 12V 10A power port  
 Air conditioner R134a with heater  
 AM FM radio  
 Cab low profile with ROPS FOPS Level II SAE J1040 J2311  
 Console adjustable with instrument panel monitoring system  
 Electric defroster rear window  
 Mirrors interior cab right and left exterior mirrors  
 Multi monitor with 7 LCD Display  
 Rearview Camera and Monitor  
 Sound suppression,74 Dba at operators ear with floor mat with tinted windows front rear and door intermittent wiper washers  
 Power train  
 Dual mode transmission 8F 4R power shift direct drive and torque converter with auto shift  
 Axle rear full floating planetary type reduction  
 Service brakes fully hydraulic wet disc  
 Parking brake spring apply hydraulic release dry disc  
 Differential manual lock unlock  
 Tires and rims 17.5R25 radials on one piece 13 rims 6  
 Work equipment and hydraulics  
 Blade accumulators  
 Blade lift float detent type LH and RH  
 Circle drawbar mounted 360 rotation with blade lift and circle side shift with anti drift check valves  
 Circle slip clutch  
 Greaseless circle wear plates  
 Hydraulic control valve 10 valve section with control levers  
 Hydraulic system closed center load sensing  
 Steering full hydraulic with tilt steering wheel plus leaning front wheels and frame articulation with anti drift check valves  
 Other standard equipment  
 Komtrax Level 5  
 Precleaner Turbo II  
 Provision for Grade Control TOPCON  
 Rear hitch  
 Ripper provision for battery cover and engine side covers  
 Steps and handrails right left and rear  
 Toolbox with lock  
 Vandalism protection lockable fuel tank hydraulic tank  


 Moldboard 3710 mm x 660 mm x 22 mm 12 x 26 x 0.87 with replaceable end bits 152 mm x 16 mm 6 x 0.63 throughhardened cutting edges and 5 8 hardware  
 Pusher plate for use with rear mounted ripper scarifier assembly  
 Rear mounted ripper scarifier assembly includes 3 shanks or 9 scarifier shanks can be inserted into the available slots  
 Mid mounted scarifier assembly includes 11 shanks and replaceable points  
 Amber colored warning light  
 610 mm 2 LH RH moldboard extensions  
 Kit provision for a single function front attachment  

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*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.
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