• 51,147 lbs Operating Weight
  • 237 @2100 rpm Horsepower
  • 6.1 yd³ Blade Capacity

D71PXi-24

D71 intelligent Machine Control

How do you make one of the industry’s most capable, dependable dozers even better? Make it smart. The industry’s newest slant-nosed, intelligent HST dozer features the latest iMC 2.0 capabilities, and patent-pending proactive dozing control with the ability to operate automatically 100% of the time.

Features

Outstanding visibility for your operators

Outstanding visibility to the cutting edges and excellent balance and maneuverability with a super-slant nose cab-forward design.

Smooth shifting and control

Smooth, powerful turns with hydrostatic steering. Fully electronic control provides complete automatic shifting and allows for Quick-Shift or variable speed selection.

Choose the right mode for the job

In P mode, the engine outputs its full power to help your operator perform heavy-load work. It automatically increases engine speed for maximum power when load increases. H mode increases engine high idle speed, suitable for power-intensive work.

Versatile and productive adjustable blade

Flexibility to adapt to various situations and the ability to be efficient and productive regardless of the terrain with a versatile 6-way PAT (power angle tilt) blade pitch system.

Easy-access maintenance features

Easy access to the radiator, oil cooler and charge air cooler with swing-up assisted lift system. Hydraulic fan reverses for clearing objects restricting air flow. Rear-mounted single-plane cooling system swings up for fast service.

Long-lasting undercarriage

Designed to wear evenly so the machine provides close to 100% usage of undercarriage components, Komatsu PLUS undercarriage lowers undercarriage maintenance costs by up to 40% over a conventional undercarriage. Strengthened rollers and links increase wear life up to two times.

Ready for low ground pressure needs

To provide your operation with even more versatility and adaptability, the D71 is available with an optional 36-inch wide shoe for low ground pressure applications.

Comfortable, ergonomic controls

Designed for your operator’s comfort and ease of use, the ergonomic, low-effort palm command control system (PCCS) joystick controls all directional movements, including machine travel speed and counter-rotation.

Bluetooth/USB-compatible radio

To help maximize operator comfort and connectivity, the D71 comes with standard Bluetooth AM/FM radio and additional AUX and USB connection capability.

Specifications

Engine

Model
Komatsu SAA6D114E-6*
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 114 mm x 144.5 mm 4.5" x 5.7"
Piston displacement 8.85 ltr 540 in³
Governor
All-speed and mid-range, electronic
Horsepower:
   
    SAE J1995 - Gross 179 kW 240 HP
    ISO 9249 / SAE J1349 - Net 177 kW 237 HP
    Hydraulic fan at maximum speed
159 kW 213 HP
 213 HP
Rated rpm
2100 rpm
Fan drive type
Hydraulic
Lubrication system:
   
    Method
Gear pump, force lubrication
    Filter
Full-flow
*EPA Tier 4 Final emissions certified

Hydraulic Transmission

Dual-path, hydrostatic transmission provides extensive speed changes up to 11 km/h 6.8 mph. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.

Travel speed
(quick shift mode)*
Forward
Reverse
1st 0-3.8 km/h
0-2.4 mph
0-4.5 km/h
0-2.8 mph
2nd 0-6.5 km/h
0-4 mph
0-7.5 km/h
0-4.7 mph
2.5th 0-8.4 km/h
0-5.2 mph
0-9.3 km/h
0-5.8 mph
3rd 0-11 km/h
0-6.8 mph
0-11 km/h
0-6.8 mph
Travel speed
(variable mode)
0.8-11 km/h
0.5-6.8 mph
0.8-11 km/h
0.5-6.8 mph

*Quick shift speeds are adjustable in the monitor

Final Drives

In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction. Compact in-shoe mount can reduce risk of damage by debris. Bolt-on sprocket for easy displacement.

Steering System

PCCS joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it backward reverses the machine. Simply tilt the joystick to the left or right to make a turn. Tilting the joystick fully to the left or right activates counter-rotation. HST eliminates steering clutches and brakes, providing smooth, powerful turns. Fully electronic control enables smooth operation. The PCCS utilizes shift buttons to increase and decrease speed.

Minimum turning radius
   
D71EX-24/ D71EXi-24 3.1 m 10'2"
D71PX-24/ D71PXi-24 3.1 m 10'2"
D71PX-24 Wide/ D71PXi-24 Wide 3.3 m 10'10"

Undercarriage

Suspension
Oscillating-type with equalizer bar and pivot shafts

Track roller frame
Monocoque, large section, durable construction

Rollers and idlers
Lubricated track rollers

Lubricated tracks
Parallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs. Track tension is adjusted easily with grease gun.

  D71EX-24/
D71EXi-24
D71PX-24/
D71PXi-24
D71PX-24 Wide/
D71PXi-24 Wide
Number of track rollers (each side)
8 8 8
Type of shoes (standard)
Single grouser
Single grouser
Single grouser
Number of shoes (each side)
45
45
45
Grouser height
65 mm
2.6"
65 mm
2.6"
65 mm
2.6"
Shoe width (standard)
610 mm
24"
760 mm
30"
915 mm
36"
Ground contact area
39960 cm2
43 ft2
49780 cm2
53.6 ft2
59930 cm2
64.5 ft2
Ground pressure
(with dozer, ROPS cab)
(ISO 16754)
43 kPa
6.3 psi
40 kPa
5.8 psi
35 kPa
5.0 psi
Track gauge
2230 mm
7'3"
2230 mm
7'3"
2385 mm
7'10"
Length of track on ground
3275 mm
10'8.9"
3275 mm
10'8.9"
3275 mm
10'8.9"

Service Refill Capacities

Coolant
54.5 ltr
14.4 U.S. gal
Fuel tank 439 ltr 116.0 U.S. gal
Engine oil
30.5 ltr
8.1 U.S. gal
Hydraulic ta
154 ltr
40.7 U.S. gal
Final drive (each side)
10 ltr
2.6 U.S. gal
DEF tank 20 ltr
5.3 U.S. gal

Operating Weight (approximate)

Tractor weight:
Including ROPS (ISO 3471) cab, U frame for PAT dozer, rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment.

D71EXi-24
21350 kg
47,069 lb
D71PXi-24 21800 kg 48,061 lb
D71PXi-24 Wide
22500 kg
49,604 lb

Operating weight:
Including PAT dozer, ROPS (ISO 3471) cab, operator, standard equipment, rated capacity of lubricant, coolant and full fuel tank.

D71EX-24
22600 kg
49,824 lb
D71PX-24 23100 kg 50,927 lb
D71PX-24 Wide
23900 kg
52,690 lb
D71EXi-24
22700 kg
50,045 lb
D71PXi-24 23200 kg 51,147 lb
D71PXi-24 Wide
24000 kg
52,911 lb

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 remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 235 ltr/min 62.3 U.S. gal/min at rated engine rpm.

Relief valve setting 28.8 MPa 294 kg/cm² 4,177 psi
Hydraulic cylinders

Double-acting, piston type
    (Number of cylinders) Bore
Bore
    Blade lift (2)
120 mm
4.7"
    Blade tilt (1)
130 mm
5.1"
    Blade angle (2)
110 mm
4.3"
Hydraulic oil capacity (refill):
   
    Power angle tilt dozer
154 ltr
40.7 U.S. gal
Control valves:
   
3-spool control valve for Power Angle Tilt dozer
   
    Positions:
   
    Blade lift
Raise, hold, lower, and float
    Blade tilt
Right, hold, and left
    Blade angle
Right, hold, and left
Additional control valve required for ripper
   
    Positions:
   
    Ripper lift
  Raise, hold, and lower

Standard

  • Air cleaner, double element with dust indicator
  • Air suspension seat with operator presence sensing system
  • Alternator, 24 V/90 A
  • Backup alarm
  • Batteries, 2 x 12 V/140 Ah
  • Closed engine hood
  • Color monitor, Liquid Crystal Display (LCD)
  • Decelerator/brake pedal (Single pedal)
  • Engine intake precleaner (Auto eject)
  • Expansion tank
  • Fuel prefilter with water separator
  • High mount foot rests
  • Hitch type drawbar
  • Hydraulically driven cooling fan with clean mode
  • Komatsu Diesel Particulate Filter (KDPF) with curved exhaust pipe
  • Locks, filler caps and covers
  • Radiator mask, swing up
  • Rear view monitor system
  • Starting motor, 11 kW/24 V
  • Steering system: HST system
  • Tie-offs
  • Track roller guard, center and end section
  • Track shoe assembly
    —Parallel Link Undercarriage System (PLUS) link
    610 mm 24" single grouser shoe (EX)
    760 mm 30" single grouser shoe (PX)
    915 mm 36" single grouser shoe (PX wide)
  • Underguards:
    Oil pan and hydraulic pumps

    ROPS cab*

  • Air conditioner (A/C)
  • AUX-injack
  • Cab accessories
    —12 V x 2 power supply
    —Cup holder
    —Rear view mirror
  • Front pull hook
  • LED lights
  • Multifunction Audio
  • Work lamps (Front 4, rear 2)

* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS (ISO 3471) and FOPS (ISO 3449) Level 2 standards

Optional

  • Hydraulics for ripper (EXI)
  • Long drawbar
  • Scoop holder
  • Tool kit
  • Track roller guard, full length

Multi-shank ripper (for D65EX/WX)

  • Weight (including hydraulic control unit): 1780 kg 3,924 lb
  • Beam length: 2170 mm 7'1"
  • Maximum lift above ground: 640 mm 2'1"
  • Maximum digging depth: 580 mm 1'11"