A-Line Crane Rental Service

 

 

Call or Text today for your free crane rental quote  Click Here (714) 261-3536

Aline cranes is a crane company that rents hydraulic cranes, Boom Trucks, Cherry Pickers jib cranes, and bucket trucks ranging from 3 tons to 75 tons. We operate crane rental in Orange County, Inland Empire and the Greater Los Angeles areas Our team will work with you to find the right crane for your job.  All of our mobile rental cranes come with rigging to cover most lifts and a crane operator.  If your job has special rigging needs we can address them at an on-site job inspection.

At A-line Cranes, we use only the safest, most reliable, and best maintained equipment to perform our lifting jobs. We routinely and thoroughly inspect all of our cranes, trucks, and man baskets, and immediately perform any necessary service or repair. We make sure our equipment is safe and dependable, so it won’t breakdown or malfunction, and we can perform your lift as seamlessly as possible. Our cranes and boom trucks can handle both light- and heavy-duty lifts: their weight capacity ranges from 3-ton to 75-ton, and they can reach as high as 165 feet. Our man baskets can hold up to 500 pounds, and they surpass all safety requirements. We can also transport almost any load using our heavy-duty trucks and trailers, which can handle up to 15,000 pounds.

About Boom Trucks

A boom truck serves multiple purposes by using a boom winch to recover or transport heavy items to inaccessible areas whether a ditch, hillside or to the top of a building. A boom winch mounted in the bed of a large truck can transport construction material and equipment to a site from streetside, while a boom truck equipped with a cherry picker can allow an arborist to access treetops.

A boom truck can range in size up to a Class 8 tractor-trailer rig with a bucket or aerial work platform moved by a hydraulic lifting mechanism mounted on the bed.

Cherry pickers, or buckets, typically transport workers from the ground to high places such as treetops, utility poles, sides of buildings or for fire department rescue and firefighting.

The boom is mounted either on the bed of a large truck or on a separate trailer, with larger booms requiring outriggers extended horizontally from the vehicle to stabilize and level the crane during operation.

Lifting capacity on boom trucks depending on size range from 14.5 to 1,300 U.S. tons.

The typical 17-ton capacity boom truck has a three-section proportional boom, a two-speed hoist, 20-foot outriggers with 10-foot rear stabilizers and a 121-foot maximum reach

 

Learn about Hand Signals CLICK HERE

 

Call or text us at 1-714-261-3536 for a quote, to check rates, or to schedule your project.

We have a live expert dispatchers ready to assist you 24-hours a day, 7-days a week.



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Our Services

HYDRAULIC CRANES

  • 3-20 ton boom trucks
  • 25 ton crane
  • 30 ton crane
  • 35 ton crane
  • 40 ton crane
  • 60 ton crane
  • 75 ton-100 ton cranes and bigger
  • Boom trucks and jib cranes
  • Hydraulic boom trucks and Bucket Trucks
  • 20-75 ton hydraulic cranes

More About Hydraulic Cranes

Although everything on the truck begins and ends with the hydraulic system, there s more to a hydraulic truck crane than the hydraulics. There are many components involved in lifting a load. Here are the basic parts of every hydraulic truck crane:
Boom Jib

Basic Equipment Rotex gear Outriggers Counterweights
Some basic equipment on a hydraulic truck crane:
Reinforced-steel cable Hook

Boom – The large arm mainly responsible for lifting

The most recognizable part of any crane is the boom. This
Counterweights – Multi-ton weights placed on the back of is the steel arm of the crane that holds the load.

Two-gear pump – Hydraulic pump system that uses two rotating gears to pressurize oil
Most hydraulic truck cranes have a boom that has several telescoping sections.
Jib – Lattice structure that extends out of the boom Outriggers – Supports that
So, a 70-ton hydraulic truck can use up to 10 cable parts-of-lines (multiple part) for a total of 140,000 pounds (63,503 kg), or 70 tons. The lines run up the boom and jib and attach to a 285- pound (129 kg) metal ball that keeps the lines pulled taut when no load is attached to the hook.

The hydraulic crane is based on a simple concept — the transmission of forces from point to point through a fluid. Most hydraulic machines use some sort of incompressible fluid, a fluid that is at its maximum density. Oil is the most commonly used incompressible fluid for hydraulic machines, including hydraulic cranes. In a simple hydraulic system, when a piston pushes down on the oil, the oil transmits all of the original force to another piston, which is driven up.In a simple hydraulic system, when one piston is pushed down, another piston is pushed up.A hydraulic pump creates the pressure that moves the pistons. Pressure in a hydraulic system is created by one of two types of hydraulic pumps:

Variable-displacement pump Gear pump
Most hydraulic truck cranes use two-gear pumps that have a pair of inter-meshing gears to pressurize the hydraulic oil. When pressure needs to increase, the operator pushes the foot throttle to run the pump faster. In a gear pump, the only way to get high pressure is to run the engine at full power.A 70-ton hydraulic truck crane uses a 12.7-L diesel engine that generates up to 365 horse- power. The engine is connected to three two-gear pumps, including:

Main pump – This pump operates the piston rod that raises and lowers the boom, as well as the hydraulic telescoping sections that extend the boom. The main pump is able to generate 3,500 pounds per square inch (psi) of pressure. It generates more pressure than the other two pumps because it is responsible for moving much more weight.
Pilot pressure counterweight pump – A hydraulic truck crane uses counterweights on the back of the cab to keep it from tipping over. These are added and removed by a hydraulic lift that has its own pump. The counterweight gear pump can generate 1,400 psi.
Steering/outrigger pump – One pump controls the steering and the outriggers. The outriggers are used to stabilize the truck during lifting operations. Because steering and outrigger operation are not performed simultaneously, they run off of the same pump. This pump generates 1,600 psi.

The large metal ball attached to the hook keeps the cable taut when there is no load on the hook.
To maneuver the load, the boom has to be able to move right and left, as well as up and down. Underneath the operator s cab is a Rotex gear on a turntable bearing that turns at 2 revolutions per minute (rpm). It is driven by a bidirectional, hydraulic motor mounted on the cab and housed in a metal cover to prevent injuries. The rotation is controlled by a foot-operated, hydraulic pedal in the cab.
The large gear under the cab is the Rotex gear, which allows the cab to swivel and move the boom from side to side.
Hydraulic truck cranes are used to lift heavy loads to tall heights, and it s important that the truck be completely stable during the lifting operation. The tires don t offer the stability needed, so the truck employs outriggers that act as balances to keep the crane from leaning too much to one side or the other. The outriggers use hydraulics to lift the entire truck, tires and all, off the ground. The outriggers are comprised of the beam, which is the leg of the outrigger, and the pad, which is the foot. Sometimes, “floats” are placed under the pad to dissipate the force of the crane and the load over concrete or pavement. Floats are usually wood planks that are lined up to create a base that is larger than the pad itself.
The outriggers keep the crane balanced during a lift. The inset shows all outriggers extended.
The outriggers are only one mechanism used to balance the crane during lifting operations. There are also detachable counterweights that can be placed on the back of the crane on the underside of the cab. These counterweights prevent the crane from tipping forward during operation. The amount of counterweight needed for a particular lift is determined by the weight of the load, the radius of the boom and the boom s angle during operation. The 70-ton Link-Belt truck crane has counterweights that come in 4,000-pound (1,814-kg) sections. Counterweights are only used during lifts; they have to be removed before the truck can be driven.
In the previous two sections, you learned how the hydraulics and other pieces of equipment on the hydraulic truck crane work. All of this equipment is controlled by the operator inside the cab, which is located on top of the deck. Crane operators use several control mechanisms to raise and lower the boom, rotate the cab and boom, wind and unwind the winch and control other peripheral equipment.
The crane is operated by hydraulic joysticks and foot pedals.
The 70-ton Link-Belt hydraulic truck crane has two basic types of controls for maneuvering a load:

Joysticks – There are two joysticks in the cab. One controls left-to-right movement of the boom, and the other controls forward and aft movement. Foot pedals – These pedals are responsible for retracting and extending the telescoping sections of the boom. They also control the amount of pressure being generated by the pump.
Joy sticks and foot pedals are connected to hydraulic hoses that connect various hydraulic rams to spool valves. The spool valve is connected to the hydraulic pump via a third hose that is placed between the two hoses that run from the spool valve to the hydraulic ram. When a joystick is pushed in one direction, it causes the valve to shut off one of the hydraulic hoses leading to the ram and open the other. Which way the joystick is pushed determines whether the piston in the hydraulic ram slides in or out.
The spool-valve system lets the crane operator control the hydraulic pistons.
Prior to any lift, the operator enters data into a computer inside the cab, including the weight of the object to be lifted and the height to which it is to be lifted. This computer serves as the operator s backup, warning the operator if the crane is being pushed beyond its capability. Using a binder of charts in the cab, the operator also determines the angle of lift and the radius of the boom. Once all of this is entered, the computer can track the progress of the lift and warn the driver if the crane is nearing its limitations. If the boom is lifted too high for the load amount, a series of lights just above the inside of the front window will begin to light up. These lights are the warning lights for the Load Moment Indicator (LMI)

If the operator tries to lift a load too heavy (or in some other way off the chart ), the Load Moment Indicator will light up.
There are at least two other people that may be required to perform a lift properly, including the oiler and the signalman. The oiler is responsible for making sure that all of the crane s parts are in place and secured prior to any lift. He or she also acts as a spotter during a lift to ensure that the lift is being performed properly. The signalman, as the name suggests, gives hand signals to the operator during the lift to make sure the load is being maneuvered correctly.
Hydraulic truck cranes provide brute strength to move objects, machines and even large animals that would otherwise be very difficult to budge. Using a very simple principle of hydraulics, these machines move thousands of pounds with relative ease, making them an essential component of most construction projects and a great example of the power of basic physics.

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