Hydraulic brakes are an essential component of vehicles. Whenever there is an issue with the brakes that requires immediate attention, such as replacing brake pads, resurfacing brake drums, or removing the brake backing plate, it is necessary to re-adjust the clearance between the brake pads and drums. The steps are as follows:
Remove the inspection cover from the brake drum, loosen the nut securing the brake shoe support pin and the nut on the camshaft bracket bolt.
2) Rotate the hub support pin, aligning the markings at both ends inward.

3) By repeatedly twisting the brake shoe pivot pin and adjusting the arm's screw shaft, ensure the brake friction pad and drum are fully seated. At this adjusted position, slowly tighten the bracket's securing nuts and the automatic shoe pivot pin's locking nuts to maintain the position of the brake shoe pivot pin (you can also securely tighten all adjusted bolts and nuts by pressing the brake pedal while the air pressure meets specifications).