21 Ton Excavator

Main Specification

Work weight

21000kg

Rated power

124Kw

Bucket capacity

0.9M3

Max. pulling force

183Kn

Performance

Travel speed High speed

5.3 Km/h

Travel speed Low speed

3.2Km/h

Swing speed

13.5rpm

Bucket digging force (max)

126Kn

Arm crowding force (max)

91Kn

Dimension

Overall length (in transportation)

9625mm

Overall width

2980mm

Overall height(in transportation)

2970mm

Min. ground clearance

468mm

Tail swing radius

2870mm

Operating region

Max. digging height

9728mm

Max. dumping clearance

6885mm

Max. digging depth

6611mm

Max. vertical wall digging depth

6030mm

Max. digging reach

9938mm

Max. digging reach at ground level

9767mm

Min. front swing radius

3500mm

Max. height at min. swing radius

7671mm

Engine

Model

Cummins 6BAT5.9-C173 

Type

Water cooling. Direct injection

Intake

Turbocharger after cooled

No.of cylinders

6

Inter-bore of cylinder

105mm

Strokes

125mm

Total exhaust of cylinder

6.5ltr

Rated output

126kw/2150rpm

Governor

Mechanical, all-speed control

Hydraulic System

Model

Negative flow cross power control system

Main pump

-

Model

Piston pump

Max.flow

210 × 2L /min

Hydraulic motor

-

Propel hydraulic motor

Two axial-piston motors

Swing hydraulic motor

Axial-piston motors

Safety valve

29.4MPa

Boom, arm and bucket circuit

36.5Mpa

Propel circuit

34MPa

Swing circuit

25MPa

Control circuit

3.9MPa

Cylinders

-

No.of cylinders-bore×stroke×diameter of piston-rod

-

Boom

2- Φ 120mm × 1221mm ×Φ 85mm

Arm

1- Φ 135mm × 1475mm ×Φ 95mm

Bucket

1- Φ 115mm × 1060mm ×Φ 80mm

Swing System

Drive Type

Hydraulic driven swing

Reduction unit

Double row planetary gearbox

Swing lubrication

Grease bath

Swing brake

Multi-plate wet brake

Swing speed

13.5rpm

Drive System Brakes

Steering control

Pedal (with levers)

Drive type

Hydraulic drive

Drive motor

Axial-piston motor

Max. pulling force

183kN

Max. travel speed(double modes)

5.3km/h double modes

Operate brake

Hydraulic lock

Parking brake

Multi-plate wet brake

Traveling system 

Center frame

x-section

Crawler frame

Box-section

Crawler tensioning

Grease tensioning

Crawler shoes

2 × 49 pcs

Upper roller

2 × 2 pcs

Lower roller

2 × 9 pcs

Liquid Coolant Lubricant

Fuel tank

400L

Cooling system

27L

Engine oil

21.5L

Track drive

5.4L

Swing drive

3.4L

Hydraulic oil tank

220L