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Zoomlion QY50D531 Truck Cranep

Permalink :    Last Updated : 2011-09-23
Zoomlion QY50D531 Truck Cranep

Zoomlion QY50D531 Truck Cranep

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This type of truck crane, one of the classic products in the same trade, has earned a good reputation from the customers.

The truck crane adopts self–made special-purpose chassis with 8×4 drive. The ergonomic streamline semi-mounted driver’s cab with double wing door, which has obtained a national patent, makes it convenient for rear rider to get on/off cab.

The crane adopts WEICHAI Steyr engine which is specially developed for those cranes that often travel at low speed. This kind of engine not only can produce large output torque when it starts and increase the traveling speed quickly, but also has excellent starting performance and good gradeability.

The crane is equipped with 9-speed gearbox which changes gear smoothly and is of simple structure and makes maintenance convenient.

The crane is fitted with a 42m long hexagon-section boom which is made of high-strength steel, so the boom has strong resistance to bending and torsion. The distinctively-designed circular arc sliding block (having obtained a national patent) makes the stress distributed more evenly, the load carrying capacity stronger, and the adjustment easier. The local rigidity in boom supporting point is good, which has improved the lifting capacity on boom with same thickness and achieved the goal of greater lifting capacity on lighter boom.

The boom applies an arbitrary telescopic type which can improve the stability of crane when it works with large working radius. (When boom telescopes in different sequence, the position of boom’s centre of gravity is adjusted accordingly.)

The unique manual full proportional control incorporates the advantages of traditional lever control and electric-hydraulic pilot control. It not only reserves the merits of safety & reliability of original control structure and low maintenance cost, but also realizes that the working speed of actuating mechanism is only proportional to the opening degree of control valves rather than affected by the load. Furthermore, it has improved the speed-regulation performance.

The slewing mechanism has the functions of protecting the crane automatically when the crane is overloaded, reducing the impacts, and activating hydraulic brake when the hydraulic control valve is in neutral position as well as free swing. In addition, it can automatically make boom, wire rope and lifted load slew simultaneously, and minimize the sway of boom and load while the crane starts or stops quickly, and accelerates or decelerates slewing.

The outrigger beam boasts such advantages as large outrigger span and outstanding stability. Moreover, this kind of outrigger has half-extended working mode, so the working range is extended.

The 5th outrigger is fitted with warning device (acoustic alarm), which can make operator know about the retracting state of the 5th outrigger so as to enhance safety performance of the crane.

The crane is fitted with outrigger lamps which can facilitate operation at night.

The crane is equipped with high-quality load moment limiter which has such advantages as great precision and complete information shown on the display. In this way, the safe lifting operation can be guaranteed.




Working performance specification

Max. rated total lifting capacity  kg


Max. load moment of basic boom  kN.m


1470 (Outrigger beam half extended)

Max. load moment with max. main boom length kN.m


793.8(Outrigger beam half extended)

Max. lifting height of basic boom m


Max. lifting height of main boom m


Deformation of boom is not taken into consideration

Max. lifting height of fly jib m


Working speed

Max. speed of single rope on main winch m/min


The 4th layer of drum

Max. speed of single rope onauxiliary winch  m/min


The 2nd layer of drum

Derricking time of boom  s


Telescopic time of boom  s


Slewing speed  r/min


Traveling specification

Max. traveling speed  km/h


Max. gradeability  %


Min. turning circle diameter  m


Min. ground clearance  mm


Limits for exhaust pollutants and smoke

Comply with related standards



(Stage III)

Oil consumption per hundred kilometers L


Mass specification

Deadweight of crane in traveling condition kg


Complete vehicle kerb mass kg


Front axle load  kg


Rear axle load kg


Dimension specification

Overall dimensions(L×W×H) mm


Base on outriggers m


Distance between outriggers  m

full extended 6.90

half extended 4.70

Main boom length  m


Main boom angle°


Fly jib length  m

9.5, 16

Offset angle of fly jib  °

0 , 30









Rated power      kW/r/min


Max. output torque  N.m/r/min



Changsha Zoomlion Heavy Industry Science & Technology Development Co., Ltd.

New sliding design for bracing support, side hydraulic luck

Side hydraulic luck, avoiding heavy crash during the operation, ensures security.

Anti-slew steel wire

Longevity of service for the anti-slew steel wire, ensures the security of the lifting.

Moment Limiter and Display

Automatic moment limiter has the function of self testing and alarming.

Major boom head and slider

1、Hexagon major boom adopts low alloy and high strength structure steel
2、The slider with national patent, flexible operation, logical strength distribution. Strong lifting capability.

Hydraulic Motor

1、Supercharged inter-cooled engine, capable for working at place over 4500 meters altitude.
2、International dominant variable amplitude mechanism, to make the mast close or leave the machine in parallel.
3、Three section, foldable, box shape design mast, with outstanding intensity and strength.
4、The hydraulic system is efficient, energy saving, accurate on the ratio operation, load transmission, load sensitivity control.

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