3-13
SECTION 3 –
DRIVING YOUR MOTORHOME
NOTE: It is normal to hear an occasional burst
of air pressure from the rear of the
vehicle. This is an automatic moisture
purging feature of the air brake system.
See the Brakes section of your chassis
manual for instructions on periodic
draining of brake air tank.
EXHAUST RESTRICTION
BRAKING SYSTEM
Freightliner
®
Chassis
The Exhaust Brake generates additional
“braking” power by controlled restriction of the
engine’s exhaust gas flow.
How It Works
When the Exhaust Brake is activated, a valve
closes off the engine’s exhaust causing the
exhaust back pressure to increase, which causes
the vehicle to slow down.
The increased back pressure would normally
stop the engine except the forward momentum of
the vehicle keeps the drivetrain and the engine
turning.
This controlled back pressure helps to regulate
a vehicle’s downhill speed, such as on
mountainous or hilly roads. It also provides
“braking” on level or near-level roads.
To use the Exhaust Brake
Further Information
See your chassis manual in your InfoCase for
more instructions, information, and precautions
on using this feature.
TAG AXLE SUSPENSION
SYSTEM
Freightliner
®
Chassis
(Model 42E only)
Your coach is equipped (Model 42E only)
with a Tag Axle Suspension System, which is
designed to increase the Gross Vehicle Weight
Rating (GVWR). This system is to be used when
WARNING
Do not activate the engine exhaust
braking system while on icy or extremely
wet roads or in any other situation where
abrupt deceleration could cause skidding
or loss of vehicle control.
Exhaust Brake Switch
(Located on driver side trim panel)
-Typical View
•
To Activate -
Press and release the ON (up)
side of the switch. The exhaust brake will
operate whenever you let up on the throttle pedal
while the switch is ON.
•
To De-activate -
Press and release the OFF
(down) side of the switch to return to chassis
brakes alone.
