Komatsu D31P-20 Dozer

Dimensions

Overall Length w/ Blade 155.1 in (3940 mm)
Length of Track on Ground 86 in (2185 mm)
Width Over Tracks 65 in (1650 mm)
Overall Width Over Blade 113.2 in (2875 mm)
Height to Top of Cab 106.1 in (2695 mm)
Height to Top of Exhaust 105.3 in (2675 mm)
Height to Top of Operator Seat 77 in (1955 mm)
Width of Cab 49.2 in (1250 mm)
Length of Cab 51.6 in (1310 mm)
Ground Clearance 14.2 in (360 mm)

Dozer Blade

Blade Width 113.2 in (2875 mm)
Blade Height 31.1 in (790 mm)
Blade Capacity (SAE) 1.70 yd3 (1.3 m3)
Blade Weight 1980 lb (900 kg)
Max Cutting Depth 12.6 in (320 mm)
Max Lift above Ground 36.0 in (915 mm)
Max Tilt Adjustment 16.5 in (420 mm)

Komatsu D31P-20 Dozer Specs

Undercarriage

Track Gauge (Standart) 65 in (1650 mm)
Track Gauge (Optional) 57 in (1450 mm)
Shoe Size (Standard) 23.6 in (600 mm)
Number of Carrier Rollers per Side 1
Number of Track Rollers per Side 6
Number of Shoes per Side 41
Grouser Height 1.9 in (47 mm)
Ground Contact Area 4064 in2 (26220 cm2)
Ground Pressure (Fully equipped) 3.9 psi (0.27 kg/cm2)

Engine Details

Number of Cylinders 4
Engine Make Komatsu
Engine Model Komatsu S4D102E-1
Displacement 240 cu in (3.9 L)
Bore 4.02 in (102 mm)
Stroke 4.72 in (120 mm)
Gross Power 75 hp (56 kw)
Net Power 70 hp (52 kw)
Power Measured @ 2350 rpm
Peak Torque 217 lb ft (294 Nm)
Torque Measured @ 1400 rpm
Aspiration Turbocharged

Operational Specs

Operating Weight 13470 lb (6110 kg)
Max Operating Weight 15850 lb (7205 kg)
Max Drawbar Pull 19760 lb (8960 kg)
Operator Station Cab with ROPS / Canopy with ROPS
Operating Voltage 24 V
Alternator 25 amps
Battery 2x 12 V, 70 Ah
Working LIghts 2 front + 1 rear
Starting Motor 4.5 kw, 24 V

Komatsu D31P-20 Specifications

Transmission

Type Komatsu HYDROSHIFT transmission with planetary gears, hydraulically-controlled, force-lubricated
Number of Forward Gears 3
Number of Reverse Gears 3
Max Forward Speed 4.1 mph (6.5 km/h)
Max Reverse Speed 4.5 mph (7.1 km/h)
Steering Single steering lever controls all direction movement. Wet, multiple-disc steering clutches are PPC controlled
Service Brakes Wet, contracting-band, steering brakes to allow easy, light-touch steering/braking actions
Final Drive Spur gear, single-reduction final drives. Bolt-on type sprockets for easy replacement.

Hydraulic System

Type Gear-type hydraulic pump mounted on rear of engine
Pump Type Gear-type pump
Pump Flow Capacity 24.0 gal/min (90 L/min)
Relief Valve Pressure 2490 psi (17160 kPa)
Control Valves Three control valves for power-angle-tiltdozer
Additional Control Valve Additional control valve required for ripper
Hydraulic Cylinders Double-acting, piston type
Blade Lift 2x cylinders – 3.54 in (90 mm)
Blade Tilt 1x cylinder – 3.54 in (90 mm)
Blade Angling 2x cylinders – 3.54 in (90 mm)

Service Refill Capacities

Fuel Tank Capacity 30.4 gal (115 L)
Engine Oil Capacity 3.7 gal (14 L)
Cooling System Capacity 5.8 gal (22 L)
Transmission Oil Capacity 3.4 gal (13 L)
Damper Case Fluid Capacity 0.4 gal (1.5 L)
Bevel Gear Case / Steering clutch 12.4 gal (47 L)
Final Drive, 1450 mm Track Gauge (each side) 2.5 gal (9.5 L)
Final Drive, 1650 mm Track Gauge (each side) 3.2 gal (12 L)
Comments: 2
  1. Rita

    What are the 3 dip sticks under seat?

    1. David R. Ledford

      Steering Clutch/Brake Oil Dipstick (Left and Right) + Transmission/Hydraulic Oil Dipstick

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