5-2 Lower Mechanism: Travel Drive Unit 10.) Removing the brake piston (1-15) Attach a nozzle for compressed air to the oil channel for the parking brake located on the flange (1-1), blow in compressed air into the cylinder chamber for the parking lot to buoy up the brake piston (1-15), and remove it. After removing the brake piston (1-15), remove the disk plate (1-13) and friction plate (1-14), and then remove the D-rings (1-16, 1-17) from the brake piston (1-15). Note: When removing the brake piston (1-15), follow the instructions below. a.When blowing in compressed air via the oil channel for the parking brake on the flange (11), ensure that no compressed air leaks. b.When blowing in compressed air via the oil channel for the parking brake on the flange (11), the brake piston (1-15) may come out if the compressed air pressure is excessively high, resulting in injury. To avoid this, set the compressed air pressure at 3 kgf/cm2 or less and proceed with the work while holding down the brake piston (1-15) so that the brake piston (1-15) does not come out.
11.) Removing the cylinder block assembly (14) Take the cylinder block assembly (1-4) out of the flange (1-1). Note: When taking out the cylinder block assembly (14), follow the instructions below. a.Hold the cylinder block assembly (1-4) in both hands and slowly take it out while rotating it from side to side. b.Take care not to damage the sliding surface of the cylinder block (1-4-1) against the valve plate (1-21). Damaging it would fail the design performance. c.Take care not to damage the sliding surface of the shoe of the piston assembly (1-4-2). Damaging it would fail the design performance.
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