Marketplace for Mechanical & Electrical Industry

Technical specifications

Structural members

Made of high strength fine grained steel, welded torsion-resistant frame type construction with large cross-section, high load-bearing capacity.

Boom

1 base boom and 4 telescoping boom sections, quadrilateral cross section welding structure. Double-cylinder plus ropes telescoping mechanism is for synchronous plus sequential telescoping. 8 pulleys on boom head are standard. Boom length:40.67ft ~ 157.44ft

Outriggers

4 outriggers, H-shape arranged, which are located at both sides of chassis frame, controlled by hydraulic valves and the cylinders are controlled by electric signals.Front and rear towing eyes are available.

Operator's cab

Integrated design, appearance is simple and

artistic. It is all-weather and equipped with large

arc glass, which has a wide vision, as well as spacious and comfortable due to ergonomic inner design. Equipped with air conditioner.

Engine

QSL, in line six-cylinder water-cooled compression ignition diesel engine, manufactured by Cummins, US, rated power is 300bhp/2100rpm, max. torque is 1010ft lb/1300 ~ 1500rpm, offroad U.S. EPA Tier 3/EU Stage IIIA emission standards.

Fuel tank capacity： Approx. 79.2gal.

Safety devices

Hydraulic balanced valve, hydraulic relief valve,

hydraulic double-way valve. Lowering limiter is equipped in winch to prevent rope overreleasing. Anti-two block is fitted on the boom head to prevent rope over-winding.

Hydraulic system

The constant power variable displacement pump is used for controlling the movements of crane.

Oil tank capacity: Approx. 330gaL

Counter weight

Self-assembly  counterweight is 396831b. Four combinations of 01bx 132281b、264551b and 396831b are available.

Operating mode

Electric controlled pilot operation system is equipped with two electric proportional control levers controlling the main movements of the crane.

Electrical system

DC 24 V, two batteries in series.

Transmission

6WG260, German ZF automatic transmission.

Hook block

77.16USt hook block, 4 sheaves, single hook.

Axles

German KESSLER axles with great load bearing capacity. Both front and rear axles are drive axles for steering.

Additional equipment

Suspensions

Front axle is rigidly connected to the frame. The rear axle is attached to the swing-type hydraulic suspension, which may be rigidly locked. During highway driving operation, shock absorption function is activated, which buffers the road shock. When driving with a suspended load, rear suspension cylinder is locked to rigid state to meet operation requirements.

Auxiliary which system

Driven by hydraulic motor, with built-in

planetary gear reducer, constant-closed brake and anti-coiling wire rope equipped.

Tires

4 tires, each axle is equipped with single tire, load bearing capacity is great.

Tire specifications: 33.25 R29.

Jib

2-section,lattice and box welding structure,

with three jib offset angles of 0° , 20° and 40° available.

Jib length:38.38ft〜67.57ft.

Steering

Full hydraulic electro-proportional multimode steering: front axle independent steering mode, tight-turning radius mode, crab walk mode and rear axle independent steering mode.

Air conditioner

Equipped in the cab, for improving comfortable performance.

Brakes

Service brake: double-circuit full-hydraulic disc brake, acting on all wheels. Selfbraking works in case the pressure in the braking system becomes too low.

Parking brake: spring-loaded, hydraulic- released independent disc brake,acting on the front axle.

Hook block

120USt hook block, 8 sheaves, double hook. 27.56t hook block, 2 sheaves, single hook. 7.72USt hook block, single hook.

Main winch system

Driven by hydraulic motor, with built-in planetary gear reducer, constant-closed brake and anti-coiling wire rope equipped.

It has features of high speed with a light load and low speed with a heavy load.

Automatic lubrication

An electric pump automatically delivers lubricant to pivots and so on, improving maintenance convenience and lubrication

timeliness.

Slewing system

 Single-row, four-point contact-ball slewing bearing, driven by hydraulic motor, with built- in planetary gear reducer and constant-closed brake equipped, and may continuously slew 360° .

Differential locks

With these differential locks fitted, pass

 ability may be improved in case of slipping

when driving on difficult roads or single-side

 tires slipping due to partly suspended

drive wheels.

Product parts list is as mentioned above, please refer to the product quotation for specific parts.

XCMG——RT120U

Weight （39683lb counterweight）

Axles

1

2

Total weight

lb

91623

37940

79500

Hook block

No.of sheaves

Remarks

77.16USt

4

Single hook

Working speeds （39683lb counterweight）

mph

33.25 R 29

20.5

60%

Mechanisms for operation

Working speeds

0-442.8    fpm, no load, 4th layer,

0-442.8    fpm, no load, 4th layer

0-2      r/min

Approx. 80s for boom elevation from -2° to 80°

Approx. 150s for boom extension from 40.67ft to 157.44ft

XCMG——RT120U