Hitachi ZW180 Operator's Manual page 195

Procedures
ZW180
If the parking brake cannot be released with the parking brake
knob due to a defective pump or for any other reason, manu-
ally move the brake piston by using the parking brake release
bolt to release the parking brake.
Manually releasing the parking brake.
1. Remove Hydraulic oil tank cap.
2. Remove the plug (3) from the center of the cap.
3. Remove the both ends of the tube (4), oil is prevented
from flowing out.
4. Remove the elbow (6).
5. Remove the orifice (7).
6. Remove the parking brake release bolt (1) and plane
washer (2) from the parking brake cap of the transmis-
sion.
7. Insert the remove bolt (1) and plane washer (2) through
the hole from where the orifice was remove in step 5,
into the screw hole at the center of the brake piston (8) as
shown in fig. 3.
8. Tighten the release bolt (1) to withdraw the brake piston
(8), thus releasing the disc brake.
When the washer touch transmission cover, tighten
about 2 – 3 total revolution of the bolt head (1) to release
completely the disc brake.
Tool needed:
Spanner hex head 27mm (adjustable spanner)
six pan
TRANSPORTING
22mm
17mm
8mm
2 1
(HEX. HEAD 17 mm)
6-7
(HEX. HEAD 22 mm)
3 (HEX. HEAD
27 mm)
6
(HEX. HEAD 27 mm)
4
(HEX. HEAD 22 mm)
Fig. 1
(Six pan 8mm)
Fig. 2
Fig. 3
M4GF-06-001
7
M4GF-06-002
8
1
2
M4GF-06-003