Key operational points for roll on/roll off transportation protection and heavy-duty truck brake pedal limit protection

During the roll on/roll off transportation process, the ship's bumps and dragging during loading and unloading can easily accidentally hit the brake pedal of heavy trucks, causing the brakes to remain on for a long time. This not only wears out the brake pads and burns the brake drum, but may also cause brake jamming. After arriving at the port, it is difficult to investigate. Proper brake pedal limit protection is a key but easily overlooked part of roll on/roll off protection. Before packing, check the pedal return status to confirm that the brake valve, pedal pin shaft, and return spring are not stuck, and that the pedal can rebound to the highest position normally. Then carry out limit fixing operations. Priority should be given to using hard blocks combined with straps. The block should be made of wood or high-strength plastic blocks, with a size that fits the gap between the pedal bottom plate and the cab floor. It is forbidden to directly use hard objects. Top on the surface of the pedal causes damage to the paint and structure, and when placing the stopper, it gets stuck under the pedal, Ensure that the pedal cannot be pressed down, and do not rely solely on elastic straps to bind the pedal. Simple straps are prone to relaxation and failure under continuous vibration. The stopper is responsible for physical limit, and the strap plays an auxiliary role in fixing to prevent the stopper from slipping and shifting. After fixing, manually push the pedal repeatedly and lightly to confirm that it cannot be pressed down at all, verifying the reliability of the limit. When protecting, avoid the pedal travel sensor and brake light switch, do not squeeze the surrounding wire harness and rubber sheath to prevent wire harness breakage and switch damage. In the high salt spray environment of roll on transportation, the binding material should preferably use seawater corrosion-resistant webbing, and do not use ordinary thin ropes that are easy to break. The fixing position should avoid surrounding components such as pipelines and steering mechanisms to prevent friction and scratches. After the vehicle is fixed to the ship's position, the pedal limit should be rechecked for the second time. When the loading and unloading crew is moving vehicles or attaching towing equipment, It is easy to touch the pedal, and rechecking is an essential step. During the vehicle's parking in the cabin, try to turn off the main power as much as possible to reduce the additional risk of accidental contact. When dismantling and accepting at the port, the removal of the limit piece should be carried out in sequence. First, loosen the strap and then remove the stopper. Do not pry hard. After dismantling, repeatedly step on the brake pedal several times to check whether the pedal returns smoothly, whether the brake light switch and brake valve are abnormal, test whether the brake air pressure is normal, confirm that there is no fatigue of the return spring or valve jamming caused by long-term limit, and check whether there are any signs of compression and wear on the pedal edge harness. The whole set of protective operation is simple, the material cost is low, and it can effectively avoid brake system failures caused by brake operation during rolling and reducing the risk of brake failure during arrival at the port Maintenance hours and spare parts losses, Ensure that the braking system of vehicles delivered to overseas customers is in good condition.