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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

FeatureKomatsu D20PLL-7EDozerKomatsu D21PL-7Dozer
TypeCrawler DozerCrawler Dozer
Horsepower29.8 kW29.8 kW
Operating Weight4710.0 kg4080.0 kg
Engine ManufacturerKomatsuKomatsu
Engine Model4 D94E4 D95S
Gross Power29.8 kW29.8 kW
Number of Cylinders44
Displacement2776.0 cc2690.8 cc
Power Measured RPM2450 RPM2450 RPM
Transmission TypeDirect DriveHydrostatic
Number of Forward Gears32
Number of Reverse Gears22
Cab Height253.0 cm249.9 cm
Width Over Track289.6 cm219.5 cm
Length Overall365.8 cm347.5 cm
Length without Blade295.7 cm265.2 cm
Length of Track on Ground210.3 cm182.9 cm
Track Gauge185.9 cm149.4 cm
Ground Clearance36.6 cm36.6 cm
No of Carrier Rollers Per Side2—
No of Track Rollers Per Side76
Shoe Size105.2 cm70.1 cm
Weight (Operating)4710.0 kg4080.0 kg
Track Pitch13.7 cm13.7 cm
Sourceheavyequipments.net archive (imported 2026-10)heavyequipments.net archive (imported 2026-10)
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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051