QY50K Truck Crane Technical Specification 

China-branded all hydraulic truck crane

Model: XZJ5390/5391JQZ50K (QY50K)

1. General Specifications

Max. rated lifting capacity: 50 t

Max. lifting moment:1764kN.m

Overall length: 13.1m

Overall width: 2.75m

Overall height: approx. 3.35m

Total vehicle curb weight: approx. 38.58t

2. Carrier

Self-designed and manufactured carrier with 4 axles, full dimension cab. Max. traveling speed is 75km/h.

Driving/ steering: 8×4×4

Min. turning radius: 12m

Min. ground clearance: 285mm

Approach angle: 16º

Departure angle: 11º

Grade ability: 46%

2.1 Frame

Self-designed and manufactured frame with all floors covered, optimized design of loaded structure, anti-torsion box-typed structure, made of high-tension steel. Boxes in which outriggers are stowed lie between 2nd and 3rd axle and in the rear of the frame. Front and rear tow-hooks are available.

2.2 Carrier Engine:

Manufacturer: Hangzhou Automotive Engine Plant 

Model: WD615.46

Engine type: 6-cycle, water cooled, in-line, turbocharger, compression ignition, direct injection, diesel engine.

Rated output power: 260 kW/2200 rpm.

Rated torque power: 1480N.m /1400rpm

Silencer: made of steel, coated with silver color paint

Environmental protection performance: complies with Euro �?/SPAN>

Fuel tank capacity: approx. 250 L

2.3 Transmission system

2.3.1 Transmission

9- speed fixed shaft mechanical transmission, rear axles driven.

2.3.2 Axles

Heavy load bearing axles, made by famous manufacturer, designed through importing foreign advanced technology, with reliable performance.

1st axle: single tire, for steering

2nd axle: single tire, for steering

3rd axle: double tires, for driving, 1-stage main reduction plus planetary reduction

4th axle: double tires, for driving, 1-stage main reduction plus planetary reduction

2.3.3 Driving shafts

Universal-shaft connected by flange, optimizes power transferring, easy to maintain and convenient to disconnect/ install.

2.3.4 Suspensions

Leaf spring suspension of front axle and leaf spring equalizing suspension of rear axle

2.3.5 Steering

Hydraulic powered mechanical steering.

2.3.6 Tires

12.00-20, suitable for heavy-duty truck, interchangeable, easy to replace

2.3.7 Brakes

Service brake: dual circuit air brake controlled by foot pedal. Max. working pressure is 0.8Mpa. 1st circuit acts on the wheels of 1st and 2nd axle, 2nd circuit acts on the wheels of 3rd and 4th axle.

Parking brake: air release brake, acts on the wheels of two rear axles by spring loaded air chambers respectively on each axle.

Auxiliary brake: engine exhaust brake.

2.4 Carrier cab

Full dimension, fully enclosed cab, good sealing, anti-vibration and corrosion- proof. 3 windshield wipers, rear vision mirrors of large view, electric control window washers, safety glasses, electric lifts of door and window, heater with defrosting device, adjustable pilot seats, air conditioner, radio-cassette player and a dust bin are available. Left-hand steering wheel is adjustable for height and inclination.

2.5 Hydraulic system

A 4-pump connected to engine through transmission and PTO provides hydraulic power for lifting operation. Hydraulic tank capacity: 370L.

2.6 Hydraulic outriggers

4 hydraulic outriggers can be hydraulically operated. There is a control console on each side of the carrier respectively. Levels for leveling the vehicle are available. The outrigger floats are stowed under the jacks. Outriggers are designed to raise the vehicle for operations in all kinds of working condition. 

Outrigger span (longitudinal×transversal): approx.5.65m×6.6m.

5th outrigger jack: located under the front of the vehicle frame for 360º operation of the boom.

2.7 Electrical equipment

24V DC, negative ground, 2 batteries. Lighting device comprises of front headlamp, fog light and reversing light etc., complied with the relative regulations in China National Standard.

2.8 Tool

A set of maintenance tool is available.

3. Crane Superstructure

3.1 Slewing mechanism

The roller slewing bearing as the connection of the carrier and the crane superstructure can rotate 360º continuously. The roller bed is sealed to resist water and dust.

3.2 Turntable

Designed and manufactured by XCMG, equivalent stress and tapered cross-section box-type structure, made of high tension steel.

3.3 Hydraulic system

A constant replacement 4-pump is powered by chassis engine through transmission and PTO. Superstructure hydraulic system is pilot open oil circuit control with ferrule-type connecting piping. The main control valve is load sensitive proportional multi-way valve, with shock-proof valve and air-corrosion resistant valve fitted in each change valve. The pilot control valve uses imported proportional pressure relief valve. The moving angle of the pilot valve handle has direct ratio with the valve output pressure, so the whole machine has fine motion control. Moreover, the load sensitive valve enables the working speed of functional parts have no relation with load, so that reduce the operating difficulty and lighten labor intensity for operator. Operations such as hoist up/down, swing, elevating or telescoping can be carried out by hydraulic system.

Hydraulic oil tank: approx. 400L.

3.3.1 Oil cooler

Oil cooler installed in hydraulic system in series prolongs the useful life of hydraulic oil, increases the working life of hydraulic parts.

3.4 Control

Conventional control is carried out by 2 self-centering 4-way joysticks in the carrier cab. All movements of the crane are controlled by pilot control through hydraulic pump and proportional valve. stepless speed variation is available.

3.5 Main winch

Main winch is controlled by open oil circuit. Variable-displacement motor, compact and high performance professionally made planetary gear reducer with wet brake, drum with special rope groove and rotation resistance wire rope are available.

Wire rope diameter: 18mm

Wire rope length: approx.180m

Max. single line speed: approx. 110m/min.

3.6 Auxiliary winch:

Auxiliary winch is controlled by open oil circuit. Variable-displacement motor, compact and high performance professionally made planetary gear reducer with wet brake, drum with special rope groove and rotation resistance wire rope are available.

Wire rope diameter: 18mm

Wire rope length: approx.125m

Max. single line speed: approx. 110m/min.

3.7 Elevating system

Boom elevation is driven by one differential cylinder with a balancing valve.

Elevating angle: -2º~ 78º

Elevating time: approx.88s

3.8 Slewing mechanism

Constant displacement motor, compact and high performance planetary gear reducer with wet brake is available. It has the function of free-slide. The slewing of the superstructure is driven by external toothing ring. Stepless speed regulation is from 0 to 2 rpm.

3.9 Telescoping boom

Made of high tension structural steel, torsion proof, consists of one base boom and 4 telescoping sections with U-typed cross-section. Adjustable spacers supporting main boom are available. The main boom is telescoped in sequence plus synchronization by two double-action reciprocating hydraulic cylinder plus wire ropes. 6 sheaves on boom top are standard equipment.

Max. lifting capacity: 50t.

Boom length: 10.7m ~ 40.1m

Telescoping time: (10.7m ~ 40.1m) approx. 180s.

3.10 Crane cab

Streamlined fully enclosed crane cab, good sealing and corrosion-proof, safe and comfortable. A large front window with sun shutter has no blind area. Wipers on front and roof windows, safety glasses, adjustable seats, joysticks on the armrests of the seats and an open outside door are available. Standard controllers and indicators are arranged ergonomically.

3.11 Safety devices

Safety devices in hydraulic system are two-way hydraulic lock, counterbalance valve, relief valve.

XCMG PAT Safety control system: adopts advanced micro-processor technology and embedded operating system, powerful function, less power consumption, high sensitivity and easy to operate. Large screen liquid crystal indicator shows lifting operation data in the way of Chinese and chart such as moment percentage, real lifting capacity, rated lifting capacity, working radius, boom length/angle, max. lifting height, working condition code, parts of line, limited angle, error code, etc. Warning and overload control effectively prevents accident during lifting operation. Special angle limit makes reliable operation in complex working condition. Overload memory (black box) is available.

XCMG PAT Safety control system includes indicator, center controller, length /angle /pressure sensors, overhoist switch, etc.

Rope-end limiter switch makes three turns of rope left on the drum.

Hoist limiter switch keep the lifting operation in specified limit.

3.12 Counterweight

Fixed on the rear of the turntable.

Weight: 4800kg.

3.13 Lattice folding jib

Made of high tension steel, two-section.

It is stowed along the side of the boom when the vehicle is traveling on road.

Jib length: 8.5m and 15m.

3.14 Hook blocks

Main hook block: 6 sheaves-- 515 kg

Auxiliary hook block: no sheave--210 kg

3.15 Color

Carrier, rim and hub: dark grey.

Cabs, superstructure and boom sections: yellow for construction machinery.

Two layers of base paint. Surface is coated with XCMG Yellow H/G Urethane Enamel.

4.  Equipments Optional

1�?/SPAN> Engine cold starter

2�?/SPAN> Back-up screen indicator