09–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
09–01 Air Cleaner Inspection
and Replacement
NOTICE
Do not use aftermarket air-cleaner elements. After-
market air-cleaner elements may not seal the
housing correctly, which can lead to engine dam-
age and potentially the loss of warranty. When re-
placing an air-cleaner element, use only the part
listed in PartsPro for the serial number of the
vehicle.
IMPORTANT: When first purchased, if the Rec-
reational Vehicle is older than the current model
year, replace the air filter.
Due to the variety of possible driving conditions
(dirt roads, paved roads, etc.), it is critical to
check the air restriction indicator, if so equipped.
If the vehicle is not equipped with an air restric-
tion indicator, inspect all components of the air
intake system and air filter every 12 months.
Replace the air filter every 24 months, or when
filter restriction equals or exceeds the maximum
allowable restriction. More frequent inspec-
tions and/or filter replacement may be
needed if your vehicle is being operated in a
dusty environment, to avoid damaging the
vehicle.
NOTE: Remove and visually inspect the air filter
for obvious damage such as holes, cuts, or
dents. Remove loose debris, such as leaves or
pine needles, from the filter housing.
Inspect the air cleaner and plumbing for holes or
tears at the recommended interval. If the air cleaner
is damaged, replace it. See Group 09 of the Recre-
ational Vehicle Chassis Workshop Manual for re-
moval and installation procedures, or take the vehicle
to an authorized Freightliner dealer. A typical air
cleaner mounting is shown in
Fig. 1.
Engine damage can occur if the air intake system is
not properly maintained. Use the air intake restriction
indicator to check for air intake system damage or
leaks. See
Fig. 2. Make sure the engine is off and
note the existing reading on the indicator. Reset the
indicator by pushing it down. See
Fig. 2. Start the
engine and take a short test drive. Check the indica-
tor again and note the level of restriction on the indi-
cator, verifying it is at the same level as seen earlier.
A decrease from the previous level of restriction or a
very low air restriction indicator reading (0 to 4
inH
2
O) could indicate an air intake system problem
such as a damaged air filter, loose or disconnected
air intake piping, or a disconnected or damaged air
restriction indicator.
Replace the air filter at the recommended interval, or
when filter restriction equals or exceeds the maxi-
mum allowable restriction. See the Recreational Ve-
hicle Chassis Operator’s Manual for specific restric-
tion values for your engine. See Group 09 of the
Recreational Vehicle Chassis Workshop Manual for
07/11/2007 f090451
Fig. 1, Air Cleaner Mounting
Air Intake 09
Recreational Vehicle Chassis Maintenance Manual, June 2015 09/1
To Next Page
Loading...
