Komatsu D21AG-7E vs. Komatsu D87E-3 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 D87 Crawler dozers

Dimensions

Blade height

Blade height 0.59 m

Blade height 1.6 cm

Ground clearance

Ground clearance 0.3 m

Ground clearance 0.49 m

Height - top of cab

Height - top of cab 2.47 m

Height - top of cab 3.51 m

Length with blade

Length with blade 3.41 m

Length with blade 6.13 m

Width over tracks

Width over tracks 1.62 m

Width over tracks 2.56 m

Length without blade

Length without blade -

Length without blade 4.51 m

Years

Years 1972-1979

Years 1996-2003

Market Average

Market Average AED 120,000

Market Average AED 480,000

Price

Price AED 70,000

Price AED 350,000

General

Blade width

Blade width 2.19 m

Blade width 3.51 m

Displacement

Displacement 2,775.97 cu cm

Displacement 11,041.63 cu cm

Drive type

Drive type Hydrostatic

Drive type Modular countershaft -type power shift

Engine model

Engine model 4D94E

Engine model S6D125E-2

Operating weight

Operating weight 3,720 kg

Operating weight 23,998 kg

Blade capacity

Blade capacity -

Blade capacity 7.11 cu m

Max torque

Max torque -

Max torque 102.91 Nm

Max speed forward

Max speed forward -

Max speed forward 10.46 kph

Operating voltage

Operating voltage -

Operating voltage 24

Engine

Gross power

Gross power 29.83 kw

Gross power 184.19 kw

Number of cylinders

Number of cylinders 4

Number of cylinders 6

Power measured @

Power measured @ 2,450 rpm

Power measured @ 2,100 rpm

Aspiration

Aspiration -

Aspiration Turbocharged

Torque measured @

Torque measured @ -

Torque measured @ 1,400 rpm

Alternator supplied amperage

Alternator supplied amperage -

Alternator supplied amperage 50 Amh

Net power

Net power -

Net power 171.51 kw

Transmission

Number of forward gears

Number of forward gears 2

Number of forward gears 6

Number of reverse gears

Number of reverse gears 2

Number of reverse gears 6

Max speed reverse

Max speed reverse -

Max speed reverse 12.23 kph

Undercarriage

Number of track rollers per side

Number of track rollers per side 5

Number of track rollers per side 7

Track gauge

Track gauge 1.31 m

Track gauge 1.98 m

Track length

Track length 1.71 m

Track length -

Track pitch

Track pitch 7.11 cm

Track pitch 21.84 cm

Track width

Track width 30.23 cm

Track width 56.13 mm

Ground contact area

Ground contact area -

Ground contact area 88,901.66 cu cm

Number of shoes per side

Number of shoes per side -

Number of shoes per side 42

Ground pressure

Ground pressure -

Ground pressure 0.66 bar

Refill capacities

Final drives fluid cap

Final drives fluid cap -

Final drives fluid cap 38.23 liters

Engine oil cap

Engine oil cap -

Engine oil cap 30.28 liter

Hydraulic system

Pump flow cap

Pump flow cap -

Pump flow cap 145.34 lpm

Relief valve pressure

Relief valve pressure -

Relief valve pressure 165.47 bar

Pump type

Pump type -

Pump type Mulitple pump gear

Service refill capacities

Cooling fluid cap

Cooling fluid cap -

Cooling fluid cap 59.05 liters

Fuel cap

Fuel cap -

Fuel cap 490.16 liter

Hydraulic fluid cap

Hydraulic fluid cap -

Hydraulic fluid cap 133.23 liter

Performance

Looking at performance technical specs and key features the Komatsu D21AG-7E Crawler dozers excels in terms of engine power at and operating weight compared to other models like the Komatsu D87E-3 Crawler dozers.

User rating

Owners operators and fleet managers recommend the Komatsu D21AG-7E Crawler dozers for its high reliability and endurance in diverse applications. The same can be said about the Komatsu D87E-3 Crawler dozers.