JCM921D Hydraulic Crawler Excavator, 21 tons, 0.9 m3 bucket

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200 unit/month

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Product Description:

•It adopts originally imported Cummins B5.9 engine which features Tier 2 standards, energy saving, environmental care, and convenient service and maintenance;
•It adopts radial seal air filter with pre-filter which effectively prolongs engine life, with fuel filling pump and pressure transmitter as standard device for higher fuel economy.
•It adopts originally imported hydraulic parts, which features stable and reliable quality, and high efficiency;
•It adopts new type cab and seats, brand-new interior, and new air conditioning system with automatic adjustment function for comfortable operation;
•New generation electric control system: large color display capable of real time monitoring of machine operation condition, self-diagnosis and recording, electric throttle, and multiple work modes.
•Multiple kinds of buckets and optional parts like dozer blades, breakers, scarifiers, electromagnetic suction cups, quick couplers, etc. are available for digging, landfill, breaking, and grading operations.
•The multifunctional GPS can achieve remote control and data transfer so that the real time machine conditions can be known.

JCM921D HydraulicCrawler Excavator

TechnicalSpecifications

          Engine

    Travel System

Model

CUMMINS B5.9-C

Travel motors

JEIL, KOREA

Variable axial piston motor

Type

Water cooling, turbocharged,  empty enter-cooling

Support roller quantities

2×7

Carrier roller quantities

2×2

No. of cylinder

6

Travel shoes

2×46

Bore and stroke

102mm×120mm

Travel speed

3.3/5.4km/h

Displacement

5.9L

Drawbar pulling force

167kN

Power output

112kW/1950rpm

Grade ability

70% (35°)

Ground clearance

470mm

      Hydraulic System

      Cab Control

Pump

KAWASAKI, JAPAN

Cab

All-weather, sound-suppressed  Cab and equipped with a heavy,  insulated Floor Mat; Front Window can be opened and slid; 6-direction  adjustable Seat; LED display, Automatic monitoring, display and warning; cool  & hot Air Conditioner

Type

variable double–piston pump

Max. discharge flow

2×208L/min

Max. discharge pressure

Boom, arm and bucket

31.9MPa

Control

Two hand levers and two foot pedals for travel Two hand levers for  excavating and swing;

Electric rotary-type engine throttle

Travel circuit

31.9MPa

Swing circuit

25.5MPa

Control circuit

3.9MPa

Boom, Arm Bucket

Pilot control pump

Gear type

Boom cylinder

120mm×85mm×1285mm

Main control valve

Negative flow control

Arm cylinder

135mm×95mm×1490mm

Oil cooler

Air cooled type

Bucket cylinder

115mm×80mm×1120mm

      Swing System

Refilling  Capacitieslubrications

Swing motor

KAWASAKI, JAPAN

Fuel tank

360L

Swing motor type

Axial-piston motor

Cooling system

25L

Brake

Hydraulic oil released

Engine oil

20L

Parking brake

Hydraulic disc brake

Hydraulic oil tank

250L  Tank oil level

Swing speed

11.5r/min

420L  Hydraulic system

                           Bucket

Type

Backhoe bucket

    Bucket capacity

0.9m3 (SAE)

Bucket width

1189mm

Arm Type

A

Max. digging depth

9281mm

B

Max. dumping height

6480mm

C

Max. digging height

6605mm

D

Max. vertical digging depth

5735mm

E

Max. Depth cut for 2440m(8')Level  Bottom

6404mm

F

Max. digging distance

9845mm

G

Max. digging radius at ground level

9671mm

H

Min. swing radius of work equipment

3500mm

Digging Force (ISO6015)        Unit: kN

Arm length

2925mm

Bucket digging force

115kN

Arm digging force

92.5kN

    Arm Type                                 2925mm

A

Overall length

9548mm

I

Tread

3360mm

B

Ground contact length  (Transportation)

4947mm

J

Track length

4160mm

C

Overall height(to top  of boom)

3073mm

K

Track gauge

2200mm

D

Overall width

2800mm

L

Track width

2800mm

E

Overall height(to top  of cab)

2965mm

M

Shoe width

600mm

F

Counter weight ground  clearance

1120mm

O

Bonnet height

2375mm

G

Ground clearance

470mm

P

Revolving frame width

2726mm

H

Tail swing radius

2905mm

Q

Distance from swivel  center to tail

2853mm

             Operating  Weight and Ground Pressure

Operating weight includes basic machine (with boom 5.7m, arm 2.925m, and bucket 0.9m3)

Shoe width

600mm

Overall width

2800mm

Ground pressure

45KPa

Operating weight

20500kg
















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