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CAT: 8612 November 2019
OPERATING INSTRUCTIONS
EMERGENCY BRAKING
Unless you have an anti-lock braking system (ABS), always avoid
completely depressing the service brake pedal, if possible, even
during emergency braking. Depressing the brake pedal too
aggressively can cause the wheels to lock, which can lead to an
uncontrolled skid and can result in an accident.
Overheated Brakes
Under normal braking conditions, the energy generated will bring the
internal brake drum temperature to about 260°C. This is well within the
safe zone. The maximum safe temperature of linings for drum type brakes
is usually about 427°C.
If service brakes are used improperly for prolonged periods or for emergency
braking, internal brake drum temperatures may exceed 427°C. Such brake
overheating may be detected by a burning smell or smoke coming from a
drum. If this occurs, you should immediately stop and check for cracked
brake drums or lining fires. If neither exists, get back behind the wheel
and resume at slow speed as soon as possible to cool the brakes.
If the vehicle were to remain stopped, the heat transfer could destroy the
linings and distort the brake drum.
To prevent drums from distorting while they cool down:
• Park the vehicle on a level surface and block the wheels.
• Release the parking brake and allow the brakes to cool down. See
Using the Parking Brake on page 148.
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