D3K2 Mulcher Dozer | Bulldozer | Crawler Dozer

Cat® D3K2 Mulcher | Overview Cat® D3K2 Mulcher | Overview
Cat® D3K2 Mulcher | Customer Story Mark Lee (Clayton, North Carolina) Cat® D3K2 Mulcher | Customer Story Mark Lee (Clayton, North Carolina)
Maintenance and Serviceability | Cat® D3K2, D4K2, D5K2 Small Dozers Maintenance and Serviceability | Cat® D3K2, D4K2, D5K2 Small Dozers
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Engine ModelCat® C4.4
Power - Net104 HP (77.6 kW)
Operating Weight - XL23746 lb (10771 kg)
Operating Weight - LGP24698 lb (11203 kg)
The D3K2 Track Type Tractor that carries HM518 Mulcher is a unique configuration consisting of a high performance powertrain and closed loop hydraulic system


Engine ModelCat® C4.4
Power - Net104 HP (77.6 kW)
Operating Weight - XL23746 lb (10771 kg)
Operating Weight - LGP24698 lb (11203 kg)
Displacement269 in³ (4.4 l)
Bore4.13 in (105 mm)
Stroke5 in (127 mm)
Drive Pumps1
Pump Output17.7 gal/min (68 l/min)
Length - Basic Tractor - Without Mulcher - XL128.9 in (3275 mm)
Diesel Exhaust Fluid (DEF) Tank4.9 gal (US) (19 l)
Length - Basic Tractor - Without Mulcher - LGP128.9 in (3275 mm)
Drum Speed Range2150-2450 rpm
Ground Clearance - XL13 in (332 mm)
Sound Levels - SAE J1166 FEB200879 dB(A) (79 dB(A))
Maximum Tilt14.5 in (368 mm)
FOPSISO 3449:2005 Level II
Overall Width84 in (2122 mm)
Optimum Hydraulic Flow30 gal/min (114 l/min)
Track Gauge - LGP67.9 in (1725 mm)
Track Gauge - XL58.9 in (1495 mm)
Tractor Height - LGP108.8 in (2763 mm)
Working Width72 in (1822 mm)
Overall Length - With Blade - LGP167.6 in (4255 mm)
Overall Height58 in (1480 mm)
MotorClosed loop hydrostatic
Air ConditioningThe air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.6 kg of refrigerant which has a CO2 equivalent of 2.288 metric tonnes.
Tractor Height - XL112 in (2845 mm)
Maximum Angle - Either Side25°
NoteSpecifications shown are for machine equipped with mulcher, cab ROPS, back-up alarm, operator, coolant, lubricants and full fuel tank.
ROPSISO 3471:2008
Drive MethodPolychain belt
Weight3197 lb (1450 kg)
Width - Tractor - Standard Shoes - No Mulcher - XL74.8 in (1901 mm)
Fixed Teeth per Drum38
Width - Tractor - Standard Shoes - No Mulcher - LGP92.9 in (2360 mm)
Lift Height31 in (787 mm)
Sound Levels - ISO 6396:200879 dB(A) (79 dB(A))
Optimum Hydraulic Pressure5900 psi (407 bar)
Ground Clearance - LGP13 in (332 mm)
Length53 in (1354 mm)
Drum Capacity - Recommended Cable279 ft (85 m)
Rope Diameter - Recommended0.5 in (13 mm)
Transmission - Hydraulic Tank15.7 gal (US) (59.5 l)
Relief Valve Settings2988 psi (20600 kPa)
Final Drive - Each - XL2.6 gal (US) (10 l)
Fuel Tank51.5 gal (US) (195 l)
Cooling System5.92 gal (US) (22.4 l)
Crankcase - With Filter2.91 gal (US) (11 l)
Final Drive - Each - LGP2.6 gal (US) (10 l)
Maximum Travel Speed - Forward5.6 mile/h (9 km/h)
Ground Pressure - LGP4.2 psi (30 kPa)
Maximum Travel Speed - Reverse6.2 mile/h (10 km/h)
Relief Valve Settings7033 psi (48500 kPa)
Track Motors2
NoteEngine meets Tier 4 Final/Stage IV emission standards.
Net Power - 2,200 rpm - ISO 9249/EEC 80/1269104 HP (77.6 kW)
Net Power - 2,200 rpm - SAE J1349104 HP (77.6 kW)
Shoe Width - LGP25 in (635 mm)
Ground Pressure - XL6.2 psi (42.8 kPa)
Maximum Line Speed - Full Drum79 ft/min (24 m/min)
Maximum Line Pull - Full Drum20000 lb (9072 kg)
Rope Diameter - Optional0.63 in (16 mm)
Drum Capacity - Optional Cable256 ft (78 m)
Maximum Line Pull - Bare Drum32150 lb (14583 kg)
Maximum Line Speed - Bare Drum50 ft/min (15 m/min)
Weight1684 lb (764 kg)
Winch DriveHydraulic
Track Gauge - XL59 in (1495 mm)
Length - Track on Ground - XL89 in (2248 mm)
Shoe Width - XL16 in (406 mm)
Number of Shoes - Each Side - Sealed and Lubricated Track (SALT) Undercarriage43
Length - Track on Ground - LGP89 in (2248 mm)
Ground Contact Area - XL2829 in² (18254 cm²)
Ground Contact Area - LGP4425 in² (28550 cm²)
Number of Rollers - Each Side6
Track Gauge - LGP68 in (1725 mm)
Overall Length - With Blade - XL168 in (4266 mm)

Benefits and Features

The Cat® D3K2 Mulcher combines the foundation of the D3K2 Dozer and adds the HM518 Mulcher to make this machine durable and strong when called to action.

The Cat® HM518 mulcher frame is designed for longer life using cladding material in high wear areas. The mulcher operates with a hydraulically operated front door and adjustable push bar

The spacious, comfortable cab helps keep you relaxed and productive throughout the day.
Quiet environment
Wide door openings for easy entry/exit
Dash mounted air vents for improved air circulation
Air suspension seat for a more comfortable ride
Air conditioning for greater comfort in all climates
New ventilated seat (optional)
Heated seat and heated control handles (optional)

Balanced and rugged for operating in rough terrain and soft underfoot conditions.

Standard Equipment

  • Alternator, 12 volt, 120 Amp, heavy duty brushless
  • Alarm, backup
  • Batteries, heavy duty, maintenance free, 1,500 CCA
  • Diagnostic connector
  • Horn, electric
  • Lights, halogen, 2 front and 2 rear
  • Starter, electric, 12 volt
  • ROPS/FOPS cab
  • Cab, polycarbonate windows and air conditioning
  • Seat, air suspended, cloth
  • Seatbelt, retractable 76 mm (3 in)
  • Foot pads, dash
  • Electronic Monitoring System with:
    – Gauges for engine coolant temperature, hydraulic oil temperature and fuel level
    – Travel speed limiter, electronic
    – Engine RPM and gear display
    – Hour meter, electric
    – Engine air cleaner service indicator, electronic
    – Water-in-fuel indicator, electronic
    – Mulcher drum speed and direction bar
  • Slope Indicate
  • Throttle switch, rotary
  • Controls, seat mounted, fore/aft adjustment
  • Armrests, adjustable
  • Mirror, rearview, inside
  • Single pedal combining deceleration and braking functions
  • Independent forward/reverse speed settings
  • Power port, 12 volt
  • Coat hook
  • Storage compartment
  • Cup holder
  • Floor mat, rubber, heavy duty
  • Hydraulics, 3 valve
  • Load sensing hydraulics
  • Single lever, three function control
  • Hydraulic pump and oil
  • Closed-loop hydrostatic circuit
  • Axial Piston variable displacement pump and motor
  • Cat® C4.4 diesel engine, turbocharged, U.S. EPA Tier 4 Final/EU Stage IV certified with aftertreatment
  • Aftercooler, Air-to-Air (ATAAC)
  • Aluminum bar plate cooling system (radiator, power train)
  • Air cleaner with precleaner, automatic dust ejection and under-hood intake
  • Dual path, closed-loop hydrostatic transmission
  • Electric fuel priming pump
  • Fuel/water separator
  • Reversing fan
  • SALT Undercarriage
  • 6 roller track frame
  • Track rollers, lifetime lubricated
  • Carrier rollers
  • Track adjusters, hydraulic
  • Guards, front/rear guiding
  • Master link
  • Cat Product Link™ PL641 Cellular
  • C-Frame, VPAT, hydraulic cylinders and lines
  • Lockable engine enclosures
  • Front pull device
  • Ecology drains (engine, power train and implement oil and engine coolant)
  • Scheduled oil sampling ports (engine, power train implement oil)
  • Vandalism protection
  • Hinged radiator grill
  • Rearview camera
  • Extended life coolant, –37° C (–35° F)
  • Guard, track guiding, center
  • Screen, rear, cab
  • Screen, side, cab
  • Sweeps, front
  • Sweeps, rear
  • Heavy duty crankcase guard

Optional Equipment

  • Radio, AM/FM, Bluetooth
  • Guard, track guiding, center
  • Screen, rear, cab
  • Screen, side, cab
  • Sweeps, front
  • Sweeps, rear
  • VPAT XL blade
  • VPAT LGP blade
  • VPAT Intermediate blade
  • Counterweight, rear
  • Winch, retrieval
  • Heater, engine, coolant, 120 volt
  • Starting aid, ether
  • Extended life coolant, –50° C (–58° F)