Adjustment of the trailer
As the brake shoe friction plates wear, the gap between the brake drum and the brake shoe friction plates will increase, and the stroke of the brake chamber push rod will also increase accordingly. If the stroke of the brake chamber push rod is greater than 40mm, it indicates that the gap between the brake drum and the brake shoe friction plate is too large. At this point, it is necessary to adjust the wheel brakes. After adjustment, the stroke of the brake chamber push rod should be around 20mm. The stroke of the push rods in the two brake chambers of the rear wheel should be consistent to ensure that the left and right rear wheels brake simultaneously. The gap between the adjusted brake shoe friction plate and the inner surface of the brake hub should be measured at a distance of 20-30mm near the cam end, and the gap should be approximately 0.4mm; Measure at a distance of 20-30mm near the end of the pin shaft, and the gap should be 0.2-0.6mm. After releasing the brake, the brake drum should be able to rotate freely and not bite. After adjustment, a road test is required to check the braking performance and whether the brake drum is hot.
During locomotive transportation operations, the trailer braking should be 0.3 to 0.8 seconds earlier than the main vehicle braking. When the brake pedal is pressed to 4/5 of the total travel, the trailer brakes, and when further pressed, the main vehicle brakes. If the trailer brakes later than the main vehicle, it will cause the trailer to collide with the main vehicle, making it difficult for the driver to operate; If the trailer brakes too early, it may lead to traction, which can lead to issues such as frame stretching and brake cup damage.
