Komatsu D155AXi-8 Bulldozer

Komatsu D155AXi-8 Bulldozer

Rated rpm 1900 rpm
Operating Weight 41100 kg 90,610 lb
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Cab Top GNSS Antenna

No blade mounted GNSS antenna(s), cables to worry about damaging with cab top GNSS antenna. Reduced risk of theft due to low visibility as viewed from ground level.

D155AXi-8  

Stroke Sensing Hydraulic Cylinders

Robust stroke sensing hydraulic cylinders employ proven Komatsu sensor technologies for accurate finish grade performance. Stroke sensing angle cylinder allows machine control system to know the angle of the blade.

D155AXi-8  

Enhanced Inertial Measuring Unit (IMU+)

Chassis mounted IMU+ and intelligent logic enables accurate grading performance without blade mounted sensors.

D155AXi-8  

New Tier 4 Final Engine

The Komatsu SAA6D140E-7 engine is EPA Tier 4 Final emissions certified and provides exceptional performance while reducing fuel consumption. Based on Komatsu proprietary technologies developed over many years, this new diesel engine reduces nitrogen oxides (NOx) by more than 80% when compared to Tier 4 interim levels. Through the in-house development and production of engines, electronics, and hydraulic components, Komatsu has achieved great advancements in technology, providing high levels of performance and efficiency in virtually all applications.

Tier 4 Final engine  

Heavy-duty aftertreatment system

This new system combines a Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR). The SCR NOx reduction system injects the correct amount of DEF at the proper rate, thereby decomposing NOx into non-toxic water (H2O) and nitrogen gas (N2).

Heavy-duty aftertreatment system  

New Fuel Efficient Bulldozer

New D155AXi-8 has achieved both high levels of productivity and fuel economy through usage of SIGMADOZER and automatic transmission with lockup torque converter.

Fuel Efficient Bulldozer  

Ripper Auto-return

The ripper control lever is new, ergonomic and incorporates an auto-return function that will automatically raise the ripper so the operator is less fatigued at the end of the day. The function starts when travel lever is moved to reverse position.

Ripper Auto-return  

Komatsu Auto Idle Shutdown

Komatsu auto idle shutdown automatically shuts the engine down after idling for a set period of time to reduce unnecessary fuel consumption and exhaust emissions. The amount of time before the engine is shutdown can be easily programmed from 5 to 60 minutes.

Komatsu Auto Idle Shutdown  

Engine

Model
Komatsu SAA6D140E-7**
Type
4-cycle, water-cooled, direct injection
Aspiration
Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders
6
Bore x stroke140 mm x 165 mm5.51" x 6.50"
Piston displacement15.24 ltr930 in³
Governor
Mid-range, electronic
Horsepower:

SAE J1995 - Gross268 kW360 HP
ISO 9249 / SAE J1349* - Net264 kW354 HP
Rated rpm
1900 rpm
Fan drive type
Hydraulic
Lubrication system:

Method
Gear pump, force lubrication
Filter
Full-flow
*Net horsepower at the maximum speed of            radiator cooling fan: 239 kW 320 HP

**EPA Tier 4 Final emissions certified  

TORQFLOW Transmission

Komatsu's automatic TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase, torque converter with lockup clutch, and a planetary gear, multipledisc clutch transmission which is hydraulically actuated and force-lubricated for optimum heat dissipation. Equipped with gearshift lock lever and neutral safety switch.

Travel speed:
 
1st Gear forward3.8 km/h 2.4 mph
1st Gear reverse4.6 km/h 2.9 mph
2nd Gear forward5.6 km/h 3.5 mph
2nd Gear reverse6.8 km/h 4.2 mph
3rd L Gear forward7.5 km/h 4.7 mph
3rd L Gear reverse9.2 km/h 5.7 mph
3rd Gear forward11.6 km/h 7.2 mph
3rd Gear reverse14.0 km/h 8.7 mph

Final Drive

Double-reduction, spur and planetary final drives increase tractive effort. Segmented sprockets are bolt-on for easy in-the-field replacement.

Steering System

PCCS lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to the left to make a left turn. Tilt it to the right for a right turn.

Hydrostatic steering system (HSS) is powered by steering planetary units and an independent hydraulic pump and motor. Counter-rotation turns are also available. Wet, multiple-disc, pedal-controlled service brakes are spring-actuated and hydraulically released. Gearshift lock lever also applies parking brakes.

Minimum turning radius2.14 m7'0"

Undercarriage

Suspension: Oscillation-type with equalizer bar and forward mounted pivot shafts

Track roller frame: Monocoque, high-tensilestrength steel construction

K-Bogie undercarriage
Lubricated track rollers are resiliently mounted the track frame with a bogie suspension system whose oscillating motion is cushioned by rubber pads.

Track shoes
Lubricated tracks. Unique dust seals for preventing entry of foreign abrasives into pin-to-bushing clearance for extended service. Track tension easily adjusted with grease gun.

Number of shoes (each side)42 
Grouser height80 mm3.1"
Shoe width (standard/maximum)24" / 28"610 mm / 710 mm
Ground contact area39955 cm²6,193 in²
Ground pressure (tractor only)80.3 kPa / 0.82 kg/cm²11.6 psi
Number of track rollers (each side)7 
Number of carrier rollers (each side)2 

Service Refill Capacities

Fuel tank625 ltr 165 U.S. gal
Coolant104 ltr27.5 U.S. gal
Engine oil37 ltr9.8 U.S. gal
Damper1.5 ltr0.4 U.S. gal
Transmission, bevel gear, and steering system90 ltr
23.8 U.S. gal
Final drive (each side)31 ltr
8.2 U.S. gal
DEF tank39 ltr10.3 U.S. gal
Hydraulic oil capacity
95 ltr25.1 U.S. gal

Operating Weight

Tractor weight
Including rated capacity of lubricant, coolant, full fuel tank,            operator, and standard equipment (including ROPS cab).
32760 kg72,223 lb
Operating weight
Including strengthened SIGMADOZER, giant ripper, ROPS cab,            operator, standard equipment, rated capacity of lubricant, coolant,            and full fuel tank.
41100 kg90,610 lb
Ground pressure100.9 kPa / 1.03 kg/cm²14.6 psi


Hydraulic System

Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit:
All spool control valves externally mounted beside the hydraulic tank.

Variable piston pump with capacity (discharge flow) of 325 L/min85.9 U.S. gal for steering and 180 L/min 47.6 U.S. gal for implement at rated engine rpm.

Relief valve setting
. . . for implement 27.5 MPa 280 kg/cm² 3,980 psi
. . . for steering 38.2 MPa 390 kg/cm² 5,550 psi

Control valves:

Spool control valve for SIGMADOZER, Semi-U tilt dozer and Full-U tilt dozer.

Positions:Blade liftRaise, hold, lower, and float

Blade tiltRight, hold, and left
Additional control valve required for variable digging angle multi-shank ripper and giant ripper.

Positions:Ripper liftRaise, hold, and lower

Ripper tiltIncrease, hold, and decrease
Hydraulic cylinders
Double-acting, piston
Number of cylindersBoreBore
Blade Lift / 2110 mm4.33"
Blade Tilt (Dual tilt) / 2160 mm6.30"
Blade Tilt (Single Tilt) / 1160 mm6.30"
Ripper Lift180 mm7.09"
Ripper Tilt / 1200 mm7.87"
Hydraulic oil capacity (refill):

SIGMADOZER95 ltr25.1 U.S. gal
Semi-U dozer95 ltr25.1 U.S. gal
Full-U dozer95 ltr25.1 U.S. gal
Ripper equipment (additional volume):

Multi-shank ripper37 ltr9.8 U.S. gal
Giant ripper37 ltr9.8 U.S. gal

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