Komatsu D21A-5 vs. Komatsu D61EX-12 Crawler dozers Comparison

Compare available technical data for Bulldozers. Find the right details to make your decision easier.

Comparison

Highlight differences

Komatsu D21 Crawler dozers

Komatsu D61 Crawler dozers

General

Blade capacity

Blade capacity 0.76 cu m

Blade capacity 3.44 cu m

Blade width

Blade width 2.19 m

Blade width 3.29 m

Displacement

Displacement 2,941.48 cu cm

Displacement 8,300.07 cu cm

Drive type

Drive type Hydrostatic

Drive type TORQFLOW

Engine model

Engine model 4D92-2P

Engine model S6D114E-1

Max speed forward

Max speed forward 4.51 kph

Max speed forward 10.46 kph

Max torque

Max torque 147.1 Nm

Max torque 784.06 Nm

Operating weight

Operating weight 3,620 kg

Operating weight 16,900 kg

Operating voltage

Operating voltage -

Operating voltage 24 V

Years

Years 1972-1979

Years 2000-2004

Market Average

Market Average AED 120,000

Market Average AED 520,000

Price

Price AED 70,000

Price AED 400,000

Dimensions

Blade height

Blade height 0.59 m

Blade height 1.2 m

Ground clearance

Ground clearance 0.34 m

Ground clearance -

Height - top of cab

Height - top of cab 2.16 m

Height - top of cab 3.14 m

Length with blade

Length with blade 3.41 m

Length with blade 5.46 m

Length without blade

Length without blade 2.47 m

Length without blade -

Width over tracks

Width over tracks 1.62 m

Width over tracks 1.92 m

Service refill capacities

Cooling fluid cap

Cooling fluid cap 13.25 liter

Cooling fluid cap 44.28 liter

Fuel cap

Fuel cap 60.18 liter

Fuel cap 315.29 liter

Engine

Gross power

Gross power 29.08 kw

Gross power -

Number of cylinders

Number of cylinders 4

Number of cylinders 6

Power measured @

Power measured @ 2,450 rpm

Power measured @ 1,850 rpm

Alternator supplied amperage

Alternator supplied amperage -

Alternator supplied amperage 35 Amh

Aspiration

Aspiration -

Aspiration Turbocharged

Net power

Net power -

Net power 113.35 kw

Torque measured @

Torque measured @ -

Torque measured @ 1,300 rpm

Undercarriage

Ground pressure

Ground pressure 0.3 bar

Ground pressure 0.44 bar

Number of shoes per side

Number of shoes per side 37

Number of shoes per side 46

Number of track rollers per side

Number of track rollers per side 5

Number of track rollers per side 8

Track gauge

Track gauge 1.31 m

Track gauge 1.92 m

Track length

Track length 1.71 m

Track length 3.2 m

Track pitch

Track pitch 13.72 cm

Track pitch -

Track width

Track width 30.23 cm

Track width 60.2 cm

Ground contact area

Ground contact area -

Ground contact area 96,623.26 cu cm

Transmission

Max speed reverse

Max speed reverse 5.47 kph

Max speed reverse 12.87 kph

Number of forward gears

Number of forward gears 2

Number of forward gears 3

Number of reverse gears

Number of reverse gears 2

Number of reverse gears 3

Hydraulic system

Pump flow cap

Pump flow cap 53.37 lpm

Pump flow cap -

Relief valve pressure

Relief valve pressure 152.01 bar

Relief valve pressure 206 bar

Pump type

Pump type -

Pump type Closed center, load sensing

Blades

Blade angle

Blade angle -

Blade angle 25 º

Refill capacities

Engine oil cap

Engine oil cap -

Engine oil cap 19.3 liter

Final drives fluid cap

Final drives fluid cap -

Final drives fluid cap 28.77 liter

Performance

Looking at performance technical specs and key features the Komatsu D21A-5 Crawler dozers excels in terms of engine power at and operating weight compared to other models like the Komatsu D61EX-12 Crawler dozers.

User rating

Owners operators and fleet managers recommend the Komatsu D21A-5 Crawler dozers for its high reliability and endurance in diverse applications. The same can be said about the Komatsu D61EX-12 Crawler dozers.