Komatsu D31EX-21 Crawler Dozer Specs

Category: Crawler Dozers ➔
Manufacturer: Komatsu ➔
Model: D31EX-21 ➔

The Komatsu D31EX-21 Crawler Dozer is a versatile and powerful machine designed for various earthmoving and construction tasks. With a turbocharged and air-to-air aftercooled engine model SAA4D102E-2, this bulldozer offers a net power of 75 hp to tackle challenging terrains with ease. Operating at an operating weight of 15,720 lbs, this dozer boasts a hydraulic system relief valve pressure of 2990 psi and a ground pressure of 6.3 psi. Equipped with a dual-path hydrostatic transmission, it offers a maximum forward and reverse speed of 5.3 mph, making it efficient for various projects.

Dimensions

Komatsu D31EX-21 Crawler Dozer Dimensions specifications
Ground Clearance	1.30 ft (0.40 m)
Height - Top of Cab	8.90 ft (2.71 m)
Length of Track on Ground	6.60 ft (2.01 m)
Length w/ Blade	13.20 ft (4.02 m)
Width Over Tracks	6.10 ft (1.86 m)

Engine

Komatsu D31EX-21 Crawler Dozer Engine specifications
Aspiration	turbocharged and air-to-air aftercooled
Displacement	240.00 cu in (3,932.90 cu cm)
Engine Model	SAA4D102E-2
Net Power	75.00 hp (55.93 kw)

Hydraulic System

Komatsu D31EX-21 Crawler Dozer Hydraulic System specifications
Relief Valve Pressure	2990 psi

Operating Specifications

Komatsu D31EX-21 Crawler Dozer Operating Specifications specifications
Cooling System Fluid Capacity	7.10 gal (26.87 l)
Engine Oil Capacity	3.30 gal (12.49 l)
Final Drives Fluid Capacity	0.90 gal (3.41 l)
Fuel Capacity	43.60 gal (165.03 l)
Hydraulic Fluid Capacity	12.40 gal (46.93 l)
Operating Weight	15,720.00 lbs (7,130.48 kg)

Standard Blade

Komatsu D31EX-21 Crawler Dozer Standard Blade specifications
Blade Angle (both directions)	25 degrees

Transmission

Komatsu D31EX-21 Crawler Dozer Transmission specifications
Max Speed - Forward	5.30 mph (8.53 kph)
Max Speed - Reverse	5.30 mph (8.53 kph)
Number of Forward Gears	3
Number of Reverse Gears	3
Transmission Type	dual-path hydrostatic transmission

Undercarriage

Komatsu D31EX-21 Crawler Dozer Undercarriage specifications
Ground Contact Area	2,496.00 cu in (40,902.20 cu cm)
Ground Pressure	6.3 psi
Number of Shoes per Side	38
Number of Track Rollers per Side	5
Standard Shoe Size	16.00 in (40.64 cm)
Track Gauge	4.80 ft (1.46 m)
Track Pitch	57.00 in (144.78 cm)

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