1. Inspection and maintenance before operation

Before the operation of the truck mounted crane, the maintenance, inspection and preparation shall be carried out according to the provisions of the operation and maintenance manual, then the engine shall be started, and various instruments shall be checked in the neutral condition. Whether there are overhead power lines or obstructions within the scope of work. After confirming that it is correct, you can prepare for operation.

2. No-load operation

Start each mechanism of the crane truck for no-load operation, operate each control system (or control device), check whether the operation and action of the mechanism are normal, whether the brake of the lifting mechanism is safe and reliable, and adjust if necessary. For hydraulic truck cranes, the oil pump should be connected to the power take-off shaft, and the hydraulic oil should be preheated at idle speed to make the oil temperature meet the specified requirements and ensure the smooth flow of the hydraulic system.

3. Boom telescopic

For the telescopic boom structure, the boom is extended ten times. In the synchronous telescopic mechanism, it should be checked whether the extended length of each boom is equal to ensure that the stress can be evenly distributed on each boom. The boom should be extended and retracted at a slow speed, and under load conditions, it is generally prohibited to extend the boom. The elevation angle of the crane jib shall not exceed the specified value in the manual.

4. Inspection and adjustment after lifting

When lifting the rated cutting load, the truck-mounted truck should stop lifting at a height of 200-300mm above the ground, and check the position of the center of the cargo, sling lashing, eccentric load, brake performance, machine stability, and boom deformation. , and whether the outrigger pressure is normal and reliable. After confirming that it is correct, you can continue to lift. If it is found that the center of gravity of the goods is shifted, the slings and lashings are suspicious, the brakes have slipping hooks, the ground supported by the outriggers is soft and sag, and the whole machine is abnormally inclined, etc., the load should be lowered immediately and adjusted in time to prevent accidents.

5. Outrigger action sequence

The truck with lifting truck is not allowed to operate without the outriggers. When extending the outriggers, it can be operated in the order of extending the back outrigger first, and then extending the front outrigger. When retracting the outriggers, retract the front outriggers first, then the rear outriggers.

6. Gravity descent and manipulation

When the hook is empty and the lifting capacity is less than 30% of the rated lifting capacity, gravity drop can be used. But you must pay attention to slow operation, so that the heavy object falls by its own weight.