Oval track pipelayer

D155CX-8 (K170)

Horsepower 264 kW @ 1 900 rpm 354 HP @ 1,900 rpm
Operating weight 54 870 kg 120,970 lbs.
Lift capacity 77 272 kg 170,000 lbs.

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Overview
Specifications
Service and support
Technology
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Designed with pipelayers in mind. Built with purpose.

Developed and designed in conjunction with pipeline companies, the D155CX-8 has a 170,000-pound lift capacity and traditional oval track design to deliver the stability and performance required on large pipeline jobs. The draw works package and boom options have been specifically designed for handling up to 36-inch steel pipe, making it ideal for gas and oil projects.

Excellent stability with a traditional oval track undercarriage
High performance and lift capacity
14% larger steering motor than the D155AX-8 base model dozer for improved maneuverability

Features and benefits

Longer track on ground

Extended track roller frames and wider track gauge over previous models provide a solid foundation for pipe lifting. Large 9-inch track pitch undercarriage is built for pipelayer applications.

D155CX-8 Purpose Built Front Bumper with Tow pin.JPG

Purpose-built structures

Exceptional structural strength with a new front bumper and integrated towing pin designed to accept a standard winch rope terminator. An extended main frame with a non-oscillating hard bar has all drawworks mounts factory integrated.

Drawworks package

The drawworks package uses custom-designed winches built to Komatsu specifications. Excellent hook speed, boom and counterweight control make precision pipework or handling large loads easy and efficient.

D155CX-8 Easy Access using ladder at rear left.JPG

Easy machine access

Easily access your machine with integrated left/right front steps, left access ladder and left/right rear walkways.

Transport storage bracket

Integrated load block transport storage bracket makes disassembly and assembly easier for shipping.

Integrated ROPS cab

Standard enclosed ROPS cab with auto climate control, large cab windows and skylight viewing area provides a comfortable operator environment in hot and cold climates.

Dozers_D155CX-8_pipelayer_threecameraview_FBforsmd.psd

Three-camera system

Improve your operator confidence with standard front, rear and right-side cameras that provide improved situational awareness around the machine.

D155CX-8 Hydrostatic Steering System.psd

Hydrostatic steering system (HSS)

The Hydrostatic Steering System (HSS) with all-directional Palm Command Control System lever controls provide smooth, quick and powerful steering control in various ground conditions. A new 14% larger steering motor than the D155AX-8 base model improves steering power and maneuverability.

D155CX-8 Precision Single Joystick Control Lever.psd

Precision single joystick drawworks control

A single joystick for control of load line, boom and counterweight provides your operator precise load control.

D155CX-8 Cold Weather Provision for Engine coolant & oil heaters.psd

Cold weather operation

Designed for cold weather operation with large capacity batteries, engine air intake heater grid, and provisions to easily install engine oil and coolant heaters.

Iridium Satellite Communications

High quality satellite data communications for Komtrax pipelayer telematics in remote areas where cellular communication network coverage is poor or not available. Komtrax data is provided free for life of the machine.

Advanced diagnostic system

Continuously monitor your machines operation and vital systems to identify machine issues, assist with troubleshooting, and minimize downtime.

Specifications for D155CX-8 K170

Full Specifications

Standard

Optional

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US system Metric

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 stroke	140 x 165 mm
Piston displacement	15.24 L
Governor	Mid-range, electronic
Horsepower:
SAE J1995 Gross	268 kW
ISO 9249 / SAE J1349* Net	264 kW
Rated rpm	1 900 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
**EPA Tier 4 Final emissions certified

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 stroke	5.51 x 6.50 in
Piston displacement	930 in³
Governor	Mid-range, electronic
Horsepower:
SAE J1995 Gross	360 HP
ISO 9249 / SAE J1349* Net	354 HP
Rated rpm	1,900 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:	320 HP
**EPA Tier 4 Final emissions certified

TORQFLOW transmission

Komatsu's 3-speed TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase, torque converter, and a planetary gear, multiple-disc 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 forward	3.8 kph
1st Gear reverse	4.6 kph
2nd Gear forward	5.6 kph
2nd Gear reverse	6.8 kph
3rd Gear forward	11.6 kph
3rd Gear reverse	14.0 kph

Komatsu's 3-speed TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase, torque converter, and a planetary gear, multiple-disc 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 forward	2.4 mph
1st Gear reverse	2.9 mph
2nd Gear forward	3.5 mph
2nd Gear reverse	4.2 mph
3rd Gear forward	7.2 mph
3rd Gear reverse	8.7 mph

Final Drives

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.

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.

Undercarriage

Suspension	Fixed roller, non-oscillating track frame
Track roller frame	Monocoque, high-tensile-strength steel construction
Track type	Sealed and lubricated
Track shoe	Moderate service with clipped grouser
Shoe width	810 mm
Shoes per side	48
Track gauge	2 400 mm
Length of track on ground	3 925 mm
Ground contact area (ISO 16754)	7.1 m²
Ground pressure (ISO 16754)¹	0.77 kgf/cm²
Track rollers per side	9
Carrier rollers per side	2
Grouser height	80 mm
Link pitch	228 mm

¹ Ground pressure with 7.3 m long boom and drawbar

Suspension	Fixed roller, non-oscillating track frame
Track roller frame	Monocoque, high-tensile-strength steel construction
Track type	Sealed and lubricated
Track shoe	Moderate service with clipped grouser
Shoe width	32 in
Shoes per side	48
Track gauge	94.5 in
Length of track on ground	154 in
Ground contact area (ISO 16754)	10,990 in²
Ground pressure (ISO 16754)¹	11.0 psi
Track rollers per side	9
Carrier rollers per side	2
Grouser height	3.1 in
Link pitch	9.0 in

¹ Ground pressure with 24 ft. long boom and drawbar

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/min for steering and 320 L/min for implement at rated engine rpm.

Relief valve setting

. . . . . . . . . . . . . . . . for implement 27.5 MPa 280 kg/cm²

. . . . . . . . . . . . . . . . . . for steering 38.2 MPa 390 kg/cm²

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 85.9 US gal for steering and 84.6 US gal for implement at rated engine rpm.

Relief valve setting

. . . . . . . . . . . . . . . . for implement 3,980 psi

. . . . . . . . . . . . . . . . . . for steering 5,550 psi

Service refill capacities

Fuel tank	625 L
Coolant	104 L
Engine oil	37 L
Damper	1.5 L
Transmission, bevel gear, and steering system	90 L
Final drive (each side)	31 L
DEF tank	39 L
Hydraulic oil capacity (tank only)	95 L
Hydraulic oil capacity (system)	133 L
Boom Winch Case (gearbox)	23.8 L
Hook Winch Case (gearbox)	15.5 L

Fuel tank	165 US gal
Coolant	27.5 US gal
Engine oil	9.8 US gal
Damper	0.4 US gal
Transmission, bevel gear, and steering system	23.8 US gal
Final drive (each side)	8.2 US gal
DEF tank	10.3 US gal
Hydraulic oil capacity (tank only)	25.1 US gal
Hydraulic oil capacity (system)	35 US gal
Boom Winch Case (gearbox)	6.3 US gal
Hook Winch Case (gearbox)	4.1 US gal

Component weights

Counterweight total weight	6 070 kg
Counterweight section quantity	11
Weight per section	11 @ 552 kg
Boom 7.3 m standard	1 715 kg
Boom 8.5 m optional	1 927 kg
Counterweight frame	1 881 kg
Counterweight yoke	636 kg
Boom block and load block	706 kg

Counterweight total weight	13,380 lbs.
Counterweight section quantity	11
Weight per section	11 @ 1,217 lbs.
Boom 24' standard	3,781 lbs.
Boom 28' optional	4,249 lbs.
Counterweight frame	4,146 lbs.
Counterweight yoke	1,400 lbs.
Boom block and load block	1,556 lbs.

Pipelaying equipment

Boom length standard	24'
Boom length optional	28'
Boom parting lines	5
Hook line partings	6
Hook low speed raise	8.5 - 13.0 m/min
Hook high speed raise	19.3 - 23.3 m/min
Hook free fall	Yes
Boom winch drum diameter	254 mm
Boom winch drum width	279 mm
Boom winch drum cable capacity	75.3 m
Boom winch drum rope diameter	19 mm
Hook winch drum diameter	254 mm
Hook winch drum width	432 mm
Hook winch drum cable capacity	152 m
Hook winch drum rope diameter	19 mm

Boom length standard	24'
Boom length optional	28'
Boom parting lines	5
Hook line partings	6
Hook low speed raise	28 - 42.8 FPM
Hook high speed raise	63.3 - 76.6 FPM
Hook free fall	Yes
Boom winch drum diameter	10"
Boom winch drum width	11"
Boom winch drum cable capacity	247'
Boom winch drum rope diameter	0.75"
Hook winch drum diameter	10"
Hook winch drum width	17"
Hook winch drum cable capacity	499'
Hook winch drum rope diameter	0.75"

Air cleaner, double element with dust indicator
Alternator, 140 ampere/24V
Backup alarm
Batteries, 200 Ah/2 x 12V
Battery disconnect switch with lockout
Boom 7.3m long
Boom and C'wt limit switches
Bumper, front with pull device
Color monitor, LCD
Counterweight, segmented
Decelerator pedal
Draw works with 7.3m boom, hook, blocks, cables, extendable counterweight
Ecology drains
- Engine oil
- Coolant
- Hydraulic oil
- Fuel tank
Engine hood
Engine idle auto shutdown with adjustable timer
Engine intake centrifugal precleaner
Engine, gull-wing side covers
Engine shutdown secondary switch
Exhaust pipe with raincap
Extended length fixed roller track frame, wide track gauge
Fast fuel provision
Fenders
Front pull hook
Fuel pre-filter and primary filter
Fuel priming pump, electric
Grid heater starting aid in cold weather
Hard bar, integral non-oscillating
High mount foot rests
Horn, warning
Hydraulic driven radiator cooling fan with manual reverse clean mode and cold weather reverse operating mode
Hydraulics for draw works and counterweight
Hydraulics for towing winch (high flow)
KOMTRAX® Level 5, Iridium satelite
Komatsu Diesel Particulate Filter (KDPF)
Variable Geometry Turbocharger (VGT)
Komatsu Selective Catalytic Reduction (SCR)
Load Moment Indicator with boom angle indicator and Anti-2-block alarm
Locks, filler caps and covers
Oil pressure check ports and covers
Oil pressure check ports for power train
PM service connector
Provision for Load Moment Indicator
Radiator mask, double door, heavy-duty, hinged perforated
Radiator reserve tank
Rear cover
Restraint harness tie-off points
ROPS cab
- Air conditioner/heater/defroster
  - Autoclimate control
  - Pressurized with air precleaner
  - Condenser remote mounted
  - Skylight in roof
  - Emergency exit
- Cab accessories
  - 12V power supply (2 ports)
  - Cup holder
  - Rearview mirro
  - Rear view monitoring (1 camera)
  - Forward view monitoring (1 camera)
  - Right view monitoring (1 camera)
  - AM/FM Radio w/remote AUX plug (3.5 mm)
  - Lunch box holder
- Work lights, 10 LED type
  - 2 front, hood mounted
  - 2 front, cab mounted
  - 2 side, cab mounted
  - 2 rear, fender mounted
  - 2 rear, cab mounted
- Monitor with 7" color display
  - Diagnostics capability
  - Performance records
  - Service records
Seat, air suspension, fabric, heated, low back, rotates 12.5° to right, headrest
Seat belt, 76 mm, retractable
Seat belt indicator
Sealed electrical connectors
Starting motor, 11.0 kW/24V
Starting aid, air intake heater grid
Steering system
- Hydrostatic Steering System (HSS)
  - High capacity steering motor
Storage bracket for blocks during transport
Torque converter
Track roller guards, end and center guiding sections
Track shoe assembly
- 228 mm pitch sealed and lubricated
- Master links
- 810 mm clipped moderate service
Transmission, 3-speed manual powershift
Underguards, heavy duty
- Hinged belly pans
Walkway with steps and handrails
Water separator, fuel
Wide core cooling package, 6 fins per inch spacing

*Rear mounted equipment is not included in base machine standard equipment

**Cab meets:
ROPS standard ISO 3471:2008
FOPS Level 2 standard ISO 3449:2005

***Accumulator meets: CRN OH 5729.1

Air cleaner, double element with dust indicator
Alternator, 140 ampere/24V
Backup alarm
Batteries, 200 Ah/2 x 12V
Battery disconnect switch with lockout
Boom 24’ long
Boom and C'wt limit switches
Bumper, front with pull device
Color monitor, LCD
Counterweight, segmented
Decelerator pedal
Draw works with 24' boom, hook, blocks, cables, extendable counterweight
Ecology drains
- Engine oil
- Coolant
- Hydraulic oil
- Fuel tank
Engine hood
Engine idle auto shutdown with adjustable timer
Engine intake centrifugal precleaner
Engine, gull-wing side covers
Engine shutdown secondary switch
Exhaust pipe with raincap
Extended length fixed roller track frame, wide track gauge
Fast fuel provision
Fenders
Front pull hook
Fuel pre-filter and primary filter
Fuel priming pump, electric
Grid heater starting aid in cold weather
Hard bar, integral non-oscillating
High mount foot rests
Horn, warning
Hydraulic driven radiator cooling fan with manual reverse clean mode and cold weather reverse operating mode
Hydraulics for draw works and counterweight
Hydraulics for towing winch (high flow)
KOMTRAX® Level 5, Iridium satelite
Komatsu Diesel Particulate Filter (KDPF)
Variable Geometry Turbocharger (VGT)
Komatsu Selective Catalytic Reduction (SCR)
Load Moment Indicator with boom angle indicator and Anti-2-block alarm
Locks, filler caps and covers
Oil pressure check ports and covers
Oil pressure check ports for power train
PM service connector
Provision for Load Moment Indicator
Radiator mask, double door, heavy-duty, hinged perforated
Radiator reserve tank
Rear cover
Restraint harness tie-off points
ROPS cab
- Air conditioner/heater/defroster
  - Autoclimate control
  - Pressurized with air precleaner
  - Condenser remote mounted
  - Skylight in roof
  - Emergency exit
- Cab accessories
  - 12V power supply (2 ports)
  - Cup holder
  - Rearview mirro
  - Rear view monitoring (1 camera)
  - Forward view monitoring (1 camera)
  - Right view monitoring (1 camera)
  - AM/FM Radio w/remote AUX plug (3.5 mm)
  - Lunch box holder
- Work lights, 10 LED type
  - 2 front, hood mounted
  - 2 front, cab mounted
  - 2 side, cab mounted
  - 2 rear, fender mounted
  - 2 rear, cab mounted
- Monitor with 7" color display
  - Diagnostics capability
  - Performance records
  - Service records
Seat, air suspension, fabric, heated, low back, rotates 12.5° to right, headrest
Seat belt, 3", retractable
Seat belt indicator
Sealed electrical connectors
Starting motor, 11.0 kW/24V
Starting aid, air intake heater grid
Steering system
- Hydrostatic Steering System (HSS)
  - High capacity steering motor
Storage bracket for blocks during transport
Torque converter
Track roller guards, end and center guiding sections
Track shoe assembly
- 9" pitch sealed and lubricated
- Master links
- 32" clipped moderate service
Transmission, 3-speed manual powershift
Underguards, heavy duty
- Hinged belly pans
Walkway with steps and handrails
Water separator, fuel
Wide core cooling package, 6 fins per inch spacing

*Rear mounted equipment is not included in base machine standard equipment

**Cab meets:
ROPS standard ISO 3471:2008
FOPS Level 2 standard ISO 3449:2005

***Accumulator meets: CRN OH 5729.1

Rear Attachment
- HD long drawbar240 kg
8.5 m boom
- Includes longer hook cable

Rear Attachment
- HD long drawbar 528 lbs.
28' boom
- Includes longer hook cable

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