Crane Trucks

Crane trucks, also known as mobile cranes or truck-mounted cranes, use hydraulic systems to operate the crane's lifting and positioning mechanisms. These hydraulic systems are essential for the controlled movement and lifting of heavy loads. Here are some common hydraulic components and equipment used on crane trucks:

Hydraulic Power Unit (HPU):

The hydraulic power unit includes a hydraulic pump, tank (reservoir), and associated components. It generates hydraulic power to operate various hydraulic functions on the crane truck.

Telescopic Boom:

Hydraulic cylinders extend and retract the telescopic boom, allowing the crane to reach different heights. The boom may consist of multiple sections, each controlled by hydraulic cylinders.

Boom Hoist System:

Hydraulic cylinders control the boom hoist mechanism, allowing the operator to raise and lower the boom.

Jib (Optional):

Some crane trucks are equipped with a jib, which is an additional boom that extends from the main boom. Hydraulic cylinders control the extension and retraction of the jib.

Winch System:

Hydraulic winches are commonly used to raise and lower the load or to control the movement of the hook. The winch may be single or multiple line, depending on the crane's design.

Slewing Mechanism:

Hydraulic systems enable the rotation or slewing of the crane. This allows the operator to position the load accurately by rotating the entire crane structure.

Outriggers or Stabilizers:

Hydraulic outriggers or stabilizers extend to provide additional stability while the crane is in operation. They are crucial for maintaining balance during lifting.

Luffing Mechanism (Optional):

For cranes with a luffing jib, hydraulic cylinders control the luffing mechanism, allowing the jib to be raised or lowered.

Load Moment Indicator (LMI):

Some crane trucks are equipped with load moment indicators that use hydraulic sensors to measure the load on the crane and provide feedback to the operator to prevent overloading.

Hydraulic Hoses and Fittings:

High-pressure hydraulic hoses and fittings connect various hydraulic components, ensuring a secure and leak-free flow of hydraulic fluid.

Hydraulic Tank:

The hydraulic tank (reservoir) stores hydraulic oil needed for the operation of the hydraulic system, ensuring a continuous supply of oil to the pump and cylinders.

Pneumatic Controls (Optional):

Pneumatic controls may be used in conjunction with hydraulic systems for certain functions, providing additional flexibility and control.

Safety Features:

Crane trucks often include safety features in the hydraulic system, such as pressure relief valves, emergency lowering systems, and interlocks, to ensure safe and controlled operations.

Electric or Manual Controls:

Controls for the hydraulic system can be electrically operated or manually operated, allowing the operator to control various functions from the crane truck's cab.

Proper maintenance and regular inspections of the hydraulic system are essential to ensure the reliable and safe operation of crane trucks. The specific features and design of hydraulic systems can vary among different types and models of mobile cranes.