2023 Komatsu Dozers D51EXi-24
- Year 2023
- Make Komatsu
- Model Dozers
- Engine Model: SAA4D107E-3 | Fan drive type: Hydraulic
2023 Komatsu Dozers D51EXi-24
Unrivaled versatilityIf you need the “Swiss Army knife” of dozers that can adapt easily to multiple situations — from golf course construction to highway projects — this dozer is it. Built for precise, high-speed grading, its standard parallel link undercarriage system has rotating bushings, which help reduce undercarriage wear, especially while traveling in reverse at high speeds. And the new Tier 4 Final engine and electronically controlled hydrostatic transmission help keep fuel use remarkably low for a dozer this powerful.
Features may include:
- Get new operators up to speed quickly
- Go from mass ex to finished grading faster than ever
- Fully integrate 3D design data into your machines
- Empower operators to work efficiently, pass after pass
- With proactive dozing control, even your less experienced operators can automatically cut/strip from existing terrain. The dozer measures the terrain it tracks over and uses that data to plan the next pass. Can improve productivity by up to 60% versus previous generation.
- Lift layer control automatically lets your operators spread fill from existing terrain with the press of a button. The dozer measures the terrain it tracks over and uses the data it gathers to plan the next pass. Attain up to double your production and achieve consistent layers for compaction quality.
- Tilt steering control automatically tilts the blade to maintain straight travel during rough dozing. Reduces operator steering input by up to 80%.
- Operators can create a temporary design surface with the press of a button. Combined with other iMC 2.0 functions, your crew can begin stripping or spreading using automated input while waiting for the finish grade model.
- Machine logic allows the dozer to continuously learn the terrain and make calculated decisions for the next pass. Intelligent Machine Control helps lessen the skill gap between new and experienced operators.
- In select situations — auto stripping, rough dozing, spreading, advanced finish grading — operators can opt for nearly 100% machine control auto usage. They can even apply automatic control without having a 3D model.
- Automatic functions give the dozer the ability to learn from operator's blade input, resulting in more adaptability, easier operation and less reliance on operator input.
- To deliver unparalleled grading performance, iMC enables the dozer to look ahead at grade transitions and alter the blade angle accordingly.
Engine
Engine Manufacturer
Komatsu
Engine
Model: SAA4D107E-3 | Fan drive type: Hydraulic
Engine Type
4-cycle, water-cooled, direct injection
Aspiration
Variable geometry, water-cooled, turbocharged, air-to-air aftercooled
Cylinder Liners
4
Bore
4.21 in
Stroke
4.88 in
Displacement
Piston: 275 in³
Engine Power
SAE J1995 - Gross: 133 HP | ISO 9249 / SAE J1349 - Net: 131 HP | Hydraulic fan at maximum speed - Net: 122 HP
Rated Engine Speed
2,200 rpm
Lubrication
Method: Gear pump, force lubrication | Filter: Full-flow
Drivetrain
Governor
All-speed, electronic
Transmission
Dual-path, hydrostatic transmission provides infinite speed changes up to 5.6 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: 1st: 0–2.1 mph / 2nd: 0–3.5 mph / 3rd: 0–5.6 mph/ Travel speed (variable mode): 0–5.6 mph | Travel speed (quick shift mode)* Reverse: 1st: 0–2.5 mph / 2nd: 0–4.0 mph / 3rd: 0–5.6 mph/ Travel speed (variable mode): 0–5.6 mph
Drive System
Final drive: In-shoe mounted, axial-piston-type travel motors, with integrated two-stage planetary gear reduction. Compact, in-shoe mount reduces risk of damage by debris. Bolt-on sprocket ring with triple labyrinth seal design.
Steering
Palm Command Control System (PCCS) joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it back 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. Hydrostatic Transmission (HST) provides smooth, powerful turns. Fully electronic control enables smooth control that can be adjusted in the monitor. The PCCS utilizes shift buttons to increase and decrease speed.
Suspension
Suspension
Rigid type
Operational
Ground Pressure
(with dozer, ROPS cab): 5.79 psi
Hydraulics
Hydraulic Type
control unit: All spool control valves externally mounted remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 26 U.S. gal/min at rated engine rpm. | cylinders: Double-acting, piston type | 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
Maximum Pressure
Relief valve setting: 3,983 psi
Chassis
Frame Type
Track roller frame: Monocoque, large section, durable construction
Dimensions
Turning Radius
Minimum: 94 in
Height
Grouser: 2.2 in
Width
Shoe width (standard): 22 in
Dimensions
Ground contact area: 4,766 in²
Gauges
Track gauge: 5 ft. 10 in
Length
of track on ground: 9 ft. 0 in
Bore
Hydraulic Number of cylinders: Bore (Blade lift/2: 3.5 in / Blade tilt/1: 4 in / Blade angle/2: 3.5 in)
Capacities
Cooling System
9.8 US gal
Fuel Capacity
tank: 71.3 US gal | Final drive (each side): 1.5 US gal | Diesel Exhaust Fluid (DEF) tank: 5.42 US gal
Oil capacity
Engine: 4.2 US gal
Hydraulic Capacity
tank: 17 US gal | oil capacity (refill): Power angle tilt dozer 17 US gal
Weights
Weight
Tractor: Including ROPS cab, U frame for Power Angle Tilt (PAT) dozer, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment. : 26,698 lbs.
Weight, In Running Order
Operating: Including Power Angle Tilt (PAT) dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, hydraulic control unit, coolant, and full fuel tank.: 30,380 lbs.
Features
Features
Rollers and idlers: Lubricated track rollers | Sealed and lubricated track: Track tension easily adjusted w/grease gun | Number of track rollers (each side): 7 | Type of shoes (standard): Single grouser | Number of shoes (each side): 44