Hitachi ZW 180-6 Operator's Manual page 270

Procedures
d
WARNING:
 Once the parking brake is released, the machine
becomes impossible to stop with the brake system.
 Wedge wheel stoppers to all tires to prevent the
machine from moving.
 Before restarting to operate the machine, consult
your nearest Hitachi dealer to have the parking
brake adjusted.
1. Rotate cap (1) counterclockwise and remove cap (1).
2. Rotate lock nut (2) counterclockwise by using tool (3)
and remove lock nut (2).
Wrench Size: 24 mm
3. Rotate set bolt (4) counterclockwise by using hexagon
wrench (5) until brake disk (7) becomes completely free.
Torque to be applied to hexagon wrench (5) is 70 N·m.
Wrench Size: 8 mm
4. Install and tighten lock nut (2) until it contacts to piston
(6).
5. Install cap (1) and lightly tighten it to prevent dust from
adhering to the lock nut.
TRANSPORTING
4
6
4
6-8
1
7
MNEC-06-003
2
MNEC-06-004
2
3
5
MNEC-06-005