Peterbilt 365 - Brakes

proper coordination between shift
lever and clutch.
How to Shift Using Double Clutch
Method
Double clutching is easier on the
transmission and on the engine, helping
match your vehicle's engine speed with
driveline speed to achieve clash-free shifts.
The manual transmission in your vehicle is
not equipped with gear synchronizers.
Whether you are upshifting or
downshifting, it is best to double clutch.
To double clutch:
1. Push the clutch pedal down to
disengage the clutch.
2. Move the gear shift lever to neutral.
3. Release the pedal to engage the
clutch. This lets you control the rpm
of the transmission mainshaft
gears, allowing you to match the
rpm of the mainshaft gears to those
of the output shaft.
a. Upshifts: let the engine and
gears slow down to the rpm
required for the next gear.
b. Downshifts: press accelerator,
increase engine and gear
speed to the rpm required in
the lower gear.
4. Now quickly press the pedal to
disengage the clutch and move the
gear shift lever to the next gear
speed position.
5. Release the pedal to engage the
clutch.
Automatic Transmissions
An automatic transmission makes shifting
much easier. It remains important to
completely understand how to operate the
transmission to optimize its efficiency.
Please read the manual for your automatic
transmission included with your vehicle.
WARNING
DO NOT leave the cab of your vehicle
without applying the parking brake.
The truck could roll and cause an acci-
dent resulting in death or personal in-
jury. Always apply the parking brake
before you leave the cab.
Auxiliary Transmission
If you have an auxiliary transmission, see
your transmission manufacturer’s manual
for its proper operation.
Brakes
Air Brake System
WARNING
DO NOT drive through water deep
enough to wet brake components, as it
may cause the brakes to work less ef-
ficiently than normal. The vehicle's
stopping distance may be longer than
expected, and the vehicle may pull to
the left or right when brakes are ap-
plied, which could contribute to an ac-
cident involving death or personal in-
jury.
Compressed air is delivered to the brake
system through the valve at the brake
pedal and is controlled with various valves
and braking circuits. The brake system is
designed with separate front, rear, and
(when applicable) trailer circuits so that if
one circuit is compromised and loses air,
the other circuits will not be affected.
Safety valves in each circuit will protect the
other circuits in the event that a circuit
loses air.
DRIVING - Brakes
Y53-6076-1D1 (09/20) 135
4