Auto Brake - Hitachi ZW 550-6 Operator's Manual

Auto Brake

Auto brake applies the service brakes and turns on the
warning buzzer when the machine speed exceeds the
preset limit. Auto brake indicator (1) appears on the
monitor panel (refer to page 1-25).
This feature protects the transmission from excessive
speed.
In case of the direction change, the warning buzzer does
not turn on, only the service brakes are applied and auto
brake indicator (1) appears.
IMPORTANT: When auto brake applies, machine may
slow down suddenly. Be prepared. Wear seat belt.
Auto brake works under the following conditions.
 Over speed
If the machine runs above the following speeds forward
or reverse;
Shift Range Forward
1 14.9 km/h (9.3 mph)
2 21.6 km/h (13.4 mph)
2L 15.4 km/h (9.6 mph)
3 35.8 km/h (22.3 mph)
3L 26.0 km/h (16.2 mph)
4 35.8 km/h (22.3 mph)
4L 35.8 km/h (22.3 mph)
f
NOTE: When the machine speed reaches the specified
machine maximum speed at the 4th speed range, the
engine speed automatically reduces before the auto brake
is applied to keep within the safety speed limit.
Still the auto brake should operate if the machine speed
exceeds the speed mentioned above or higher at each
speed range.
 Direction change
When the direction is changed while running over the
following speed.
Shift Range Speed
1st, 2nd 12.0 km/h (7.5 mph)
3rd, 4th 8.0 km/h (5.0 mph)
f
NOTE: The above specified speeds are applicable to
machines with standard tires (35/65R33). When using tires
in other size, contact to your local representative.
MOVING THE MACHINE
Reverse
14.9 km/h (9.3 mph)
23.8 km/h (14.8 mph)
17.0 km/h (10.6 mph)
35.8 km/h (22.3 mph)
28.7 km/h (17.8 mph)
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