1. Considerable enhancement of mechanical performance and bending resistance performance of hexagon-section boom and high strength special steel sheet make up of entire machine enable lighter weight and higher stregth aand remark ably improve the lifiting capacity
2. The luffing mechanism is connected with four-link mechanism results in enhancement of carrying capacity of entire crane, consideranle improvment fof working conditionof hydraulic cylinder and extenson of service lift of cylinder
3. Compact overall dimension save the installation room to the maximun and provide more utilization space of cargo body for customer
4. More safe and rliable imported hydraulic valve lock and more durable imported cylinder seal
5. High-performance hydraulic pipeline connectors and high-precision cold-drawn pipeline thoroughly eliminate the problem of oil leakage
6. The 360 full-circle slewing design features convenient and quick opeartion an enhances the wokring efficiency to the maximum
7. All opeartions of truck-mounted crane can be controlled via the opearation level at both sides of frame  the opeartions are very simple without tiring the opeartor, the obvious figurativde marks are affixed on each opearation handle for ease of opeartion by operator

Main Technical  paramters for the   YTZ5120SQ21E