freightliner BUSINESS CLASS M2 Driver Manual page 144

Pretrip and Post-Trip Inspections and Maintenance
10
3
5
7
08/23/93
Fig. 11.4, Tightening Pattern, 10-Hole Wheels
1
7
5
3
03/08/2012
Fig. 11.5, Tightening Pattern, 8-Hole Wheels
Saddle Tank Area Inspections
WARNING
When draining the air reservoir, do not look into
the air jets or direct them toward anyone. Dirt or
sludge particles may be in the airstream and
could cause injury.
NOTICE
If the water drained from the air reservoirs is
cloudy or oily, it may indicate a problem with the
compressor. If oil is allowed to contaminate the
air dryer, it will not remove the water from the air
brake system, which could adversely affect brak-
ing.
1
8
6
4
9
2
f400081a
2
4
6
8
f400052a
1. Drain the brake system air reservoirs (reservoirs
without automatic drain valves only).
WARNING
Never operate the engine with the fuel tank shut-
off valves partially closed. This could damage the
fuel pump, causing sudden loss of engine power,
possibly resulting in serious personal injury due
to reduced vehicle control.
2.
Ensure fuel tanks are secured to their mounting
brackets and that the mounting brackets are se-
cured to the frame.
If equipped with fuel tank shutoff valves, be sure
the valves are fully open.
3. Inspect visible frame rails for missing bolts, shiny
areas, or rust streaks. Check all visible cross-
members for damage or signs of looseness.
4. Inspect visible components of the exhaust sys-
tem to ensure connections are tight.
Inspect upstream of the aftertreatment device
(ATD) for cracking or signs of leaks, such as soot
trails. Inspect downstream of the ATD for signs of
exhaust leaks, such as blistering or warping of
nearby components.
Engine Compartment Inspection
1. Check the ground underneath the engine for fuel,
oil, or coolant leaks.
2. Inspect the air intake system for leaks or dam-
age.
NOTICE
Failure to maintain a sealed air intake system
could allow the entry of dirt and contaminants
into the engine. This could adversely affect en-
gine performance and result in engine damage.
2.1
Push the reset button on the air intake
restriction indicator located on the air
cleaner, if equipped.
2.2
Check the air intake duct from the air
cleaner to the engine intake. Make sure
the duct components are secure and air-
tight.
11.6