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With the wheel removed, inspect the brake drum. In many cases, it can be removed simply by pulling it off, but sometimes it may be stuck due to rust or debris. If it does not come off easily, you might need to use a hammer to lightly tap around the edges or engage the drum’s adjuster to retract the brake shoes before removal.

Use your pliers to disconnect the springs and hardware that hold the brake shoes in place. Take note of how everything is assembled, as you’ll need to replicate this during reinstallation. Once everything is disconnected, carefully remove the old brake shoes.

When measuring brake drums, technicians generally use precision tools, such as calipers or micrometers. The inner diameter is the most critical measurement, as it dictates how well the brake shoes will fit and function. If the drum's inner diameter has expanded beyond the recommended limit, it can lead to ineffective braking and potential failure of the braking system. Additionally, measuring the total thickness helps identify any significant wear that could compromise structural integrity.

Bromsskivor är utsatta för konstant friktion och värme varje gång bilen bromsar. När bromspedalen trycks ned pressas bromsbeläggen mot skivorna, vilket skapar det nödvändiga greppet för att sakta ner fordonet. Denna process leder till en gradvis nedbrytning av både bromsbelägg och bromsskivor. Bromsskivorna kan slitas ut av flera anledningar, inklusive överhettning, kontaminering av olja eller smuts, och ojämn förslitning.

What is a Brake Drum?

معایب ترمز درام

Routine maintenance of brake drums is essential for the safety of semi trucks. Drivers and fleet managers should regularly inspect the braking system, looking for signs of wear, such as grooves or cracks in the drum. A significant indicator of drum wear is a change in braking performance, such as vibrations, pulling to one side, or abnormal noises when braking.

After removing the drum, carefully inspect the brake shoes, springs, and other hardware. Look for signs of wear, such as thinning brake shoes or damaged springs. If any component appears worn out or damaged, it's best to replace it as part of your rebuild.