Assembly Adjustment ( Traveling Device)

3. Parking brake adjustment

3.1 Adjusting the clearance (between brake shoe and drum)

1. Jack up the crane and release the parking brake.

2. Rotate the brake drum. Align the adjustment hole in the drum with the adjuster wheel for the lining-drum clearance adjustment.

3. Insert the screwdriver through the adjustment hole and rotate the adjuster wheel to expand the shoes until the lining fits the drum (resistance is encountered).

4. Then return the adjuster wheel by 8 notches. The clearance between the lining and brake drum is now adjusted to the standard clearance of 0.23 mm (0.009 in).

3.2 Connecting parking brake and spring chamber

1. Place the parking brake lever in the zero-point position (middle of lever play).

2. While the parking brake is released, the spring chamber is expanded to its stroke end by the pressurized air, connect the chamber and brake lever using material X (end).

3. After connecting, check for any friction between the drum and lining. Then lock the rod with material Y (nut).

Lever stroke: approx. 20 mm (0.8 in) (for reference)