freightliner WALK-IN VAN CHASSIS Operator's Manual page 78

Pre- and Post-Trip Inspections and Maintenance
NOTICE
Coolant must be filled to the full line of the surge
tank. Low coolant could result in engine over-
heating, which could cause engine damage.
3. Inspect the radiator and charge air cooler.
3.1 Inspect the radiator and charge air cooler
for clogged fins. Use compressed air or
water directed from the fan side of the
core to backflush any material restricting
airflow.
3.2 Inspect the radiator and charge air cooler
for damage and accumulated debris.
Straighten bent or damaged fins to permit
airflow across all areas of the cores.
NOTE: When traveling through areas of high
insect concentration, it may be necessary to
clean the exterior of the radiator or the
charge air cooler core as often as every 200
miles (320 km).
3.3 Also inspect and clean the condenser. If
clogged, the condenser can restrict airflow
through the radiator.
3.4
Check the radiator for leaks. If leaks are
found, have the radiator repaired or re-
placed. Take the vehicle to an authorized
Freightliner dealer for assistance.
4. Inspect the engine for fuel, oil, and coolant leaks.
On vehicles equipped with a compressed natural
gas (CNG) engine, use a natural gas detector to
check for natural gas leaks.
Correct any leaks found.
5. Inspect the air intake system for leaks or dam-
age.
NOTICE
Failure to maintain a sealed air intake system
could allow entry of dirt and contaminants into
the engine. This could adversely affect engine
performance and result in engine damage.
5.1
Check the intake-air restriction indicator, if
so equipped.
5.2 Replace the primary filter element in the
air cleaner when filter restriction reaches
25 inH O for Cummins engines or 15
2
inH O for GM engines. See Group 09 of
2
the Walk-In Van Chassis Workshop
Manual for filter element replacement in-
structions, or take the vehicle to an autho-
rized Freightliner dealer. See
and Fig. 11.3.
09/09/2014
To replace the filter, the canister must be replaced.
Fig. 11.2, Farr Air Cleaner Filter Element
NOTE: After replacing the filter element,
reset the restriction indicator by pressing the
rubber reset button, if so equipped.
5.3 Inspect the secondary or safety filter ele-
ment in the air cleaner when replacing the
primary element, and replace it when
clogged or dirty. This element should be
replaced with every third primary element
replacement.
5.4 Check the engine air intake piping from
the air cleaner to the engine intake. In-
spect the piping for loose connections,
cracks, torn or collapsed hoses, punc-
tures, and other damage. Tighten loose
Fig. 11.2
f090509
11.2