Operation RD 27
40 wc_tx000814gb.fm
4.17 Using the Parking Brakes
Background
To aid in holding the machine in a stopped position (parked), there is a mechanical
parking brake on each drum drive motor. The mechanical parking brakes are
spring-activated and hydraulically released (SAHR) type brakes.
The parking brakes are applied when any of the following conditions exist:
The parking brake push button (h) is pressed.
The engine is switched off.
The operator leaves the seat.
There is a fault in the hydraulic system.
Engaging and
releasing
Pushing the button engages the parking brakes.
The “Brakes On” warning light illuminates when the button is pressed.
Pulling the button up allows the release of the parking brakes.
Note: All of the following conditions must be met for the parking brakes to release:
The engine must be running.
The forward/reverse lever must be in the neutral position.
The operator must be seated.
Emergency
use
NOTICE: Do not use the parking brakes to stop the machine during normal
operating conditions. Using the parking brake while the machine is moving may
damage the drive motors.
Only use the parking brakes to stop the machine during an emergency condition.
For example:
During failure of the main hydraulic braking system (no braking action when the
forward/reverse lever is moved to the neutral position)
During a runaway condition traveling down a slope
wc_gr005010
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