VISION
D R I V E R S H A N D B O O K
88
Parking Brake (With Hydraulic Brakes)
A Blue Bird
Vision
equipped with hydraulic brakes employs a foot-operated parking
brake, located to the Driver’s lower left. When the driver presses this lever into the en-
gaged position, a mechanical linkage causes a brake shoe assembly to close around
a brake drum attached to the driveshaft, preventing the bus from moving. (It should
be noted that this type parking brake becomes inoperative if the driveshaft is discon-
nected, as when the bus is being prepared for towing.) The mechanical parking brake
must be kept adjusted properly for maximum holding power.
When the parking brake is properly adjusted, the lever is designed to require
between 130 and 150 pounds of pressure to apply the parking brake. Always apply
the brake fully, pressing it down to achieve a fourth “click” of its detent setting.
To release the parking brake, apply the service brake with the left foot to prevent
movement when the parking brake is released. Then grasp the parking brake release
lever with the left hand and pull until the Park Brake is fully released.
The parking brake should hold the fully loaded bus on
a 20% incline on a dry paved surface. If the incline is wet or
covered with ice or snow, do not park on it. The brake will
hold, but the tires may not.
[CAUTION]
Always release the parking brake fully.
Leaving it in a partially released position can allow the
shoes of the parking brake mechanism to drag while the
bus is operated, resulting in overheating and accelerated
wear of the parking brake shoes and drum.
[WARNING]
The parking brake is designed to hold on
a 20% grade, on a clean, dry, and smooth road surface.
Parking on wet, icy, snow-covered or loose aggregate
surface will greatly diminish braking efficiency and is not
recommended. Always use wheel chocks.
Parking Brake (Hand operated)
Optionally, your bus may be equipped with a right side parking brake lever. This op-
tion places the hand operated parking brake to the right of the driver’s seat mounted
on the floor.
See, Parking Brake, Units With Hydraulic Brakes under Driver Orientation.
Release Handle
Pull to release.
Foot Pedal
Apply the brake fully, pressing it down to
achieve a fourth “click” of its detent setting.
Summary of Contents for VISION 2011
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