When the ISUZU tow truck arrives at the accident scene, the first step is to choose a suitable parking spot. Survey the accident scene, selecting the parking location for the main vehicle and an open area near the damaged truck. Ideally, choose flat ground for safe parking and lifting.
Estimate the actual weight of the vehicle to be lifted, confirming it is within the boom's working range, and move the tow truck as close to the target location as possible. While meeting lifting weight limits, consider the distance required for the boom's maximum extension stroke, the upward tilt angle, and the horizontal rotation radius. Clear or avoid any obstacles in the boom's rotation path, and take special measures for overhead cables or other immovable obstacles, such as rerouting or cutting off power. After determining the parking location, drive the tow truck into the designated position, put it in neutral, engage the handbrake, then shift into second gear and start the power take-off unit. Extend all four outriggers (left, right, front, and rear), ensuring the two stop pins on both sides of the rear outrigger are engaged to prevent accidental retraction. Raise the wheels approximately 20-50 mm off the ground. If the ground under the outriggers is soft, use sleepers for padding.
Before any lifting operation begins, prepare the vehicle to be towed. No one should be inside the vehicle, and all cargo or items that could interfere with the lifting must be removed to reduce weight and minimize danger. Next, choose a safe connection point for the boom hook on the vehicle, ensuring the hook or tether is strong enough to support the vehicle's full weight. Remove the stop pin from the swivel crane, rotate the boom towards the target, extend the boom so its tip is vertically above the crane's estimated center of gravity, and then lower the wire rope, preparing to hook the vehicle. All components must be properly connected before and during the lifting operation, and the wire rope must not be twisted.
Operate to shorten the wire rope, maintain the balance of the load, and lift at a constant speed to prevent tipping. Once the vehicle is lifted to a certain height, rotate the boom and lower it to an open area. Throughout the lifting process, the boom must not be extended or retracted. During rotation, the outriggers of the main vehicle must be closely monitored for sinking; if significant sinking is detected, the operation should be stopped immediately. After the boom is extended, heavy objects can be lifted from a higher position, but care must be taken not to overload one side, otherwise the vehicle's center of gravity will shift beyond the safe range. Special caution is required when the boom is rotated at a right angle to the longitudinal centerline of the recovery vehicle—this configuration makes the recovery vehicle extremely prone to overturning due to excessive load torque. Typically, the current state should be compared with the boom's lifting capacity chart to determine the boom's permissible stress state.
After the lifting operation is completed, fully retract the boom, rotate it back to its original position, lower it to the designated location, lock the swivel seat, and neatly arrange the articulated wire rope. When retracting the wire rope, carefully control the operating handle when the hook pulley is near the end to avoid equipment damage, wire rope breakage, or wire rope bursting causing injury. Finally, retract and reset all outriggers.
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