Kenworth T410, Driver'S Handbook Manual

Page: 231 / 418

CAT: 8612 November 2019 Page 205
OPERATING INSTRUCTIONS
SPRING BRAKES - MANUAL RELEASE
In order to tow a vehicle, if there is insufficient air to release the parking
brake, the spring brakes can be manually released.
Do not drive a vehicle with malfunctioning brakes. If one of the
brake circuits should become inoperative, braking distances will
increase substantially and handling characteristics while braking
will be affected. You could lose control of your vehicle, be severely
injured, or cause an accident. Have it towed to the nearest dealer or
qualified workshop for repair.
You may sometimes have to release your vehicle’s spring brakes by hand.
This could happen if the system air pressure does not reach operating
pressure because your engine or compressor is not working properly.
You will have to release the spring brakes at the spring brake chambers.
Do not disassemble a spring brake chamber. These chambers contain
a powerful spring that is compressed. Sudden release of this spring
can cause severe injury.
Do not operate a vehicle when the spring brakes have been manually
released. Driving a vehicle after its spring brakes are manually
released is extremely dangerous. You will probably have no brakes
at all. You could have a serious or fatal accident.
Releasing the spring brakes on an unsecured vehicle could lead to
an accident. The vehicle could roll, causing severe injury. Always
secure the vehicle with wheel chocks, chains, or other safe means to
prevent rolling before manually releasing the spring brakes.
When the vehicle has finished being towed, manually lock the spring
brakes, returning the brakes back to their normal operating condition. This
is a reversal of the release procedure, see steps 1-6 on page 206.