freightliner 108SD - Engine Compartment Inspection

4.3
Make sure all wheel nuts are tightened. If
tightening is necessary, use the tightening
pattern in
Fig. 21.4 or Fig. 21.5.
5.
Inspect the outboard side of all wheel hubs and
the hub oil seal area on the inboard side of each
wheel for signs of oil leakage. If any oil is found
on wheel and tire or brake components, remove
the vehicle from service until the leak has been
fixed.
If needed, fill the hubs to the level indicated on
the hub cap. See Group 35 of the 108SD and
114SD Maintenance Manual for recommended
lubricants.
6.
Check that mud flaps are undamaged and hang
10 inches (25.4 cm) or less from the ground.
Saddle Tank Areas Inspection
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.
Drain the brake system air reservoirs (reservoirs
without automatic drain valves only).
2.
Ensure fuel tanks are secured to their mounting
brackets and that the mounting brackets are se-
cured to the frame.
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.
1
2
3
45
6
7
8
9
10
f400081a
08/23/93
Fig. 21.4, Tightening Pattern, 10-Hole Wheels
f400052a
1
2
3
4
5
6
7
8
03/08/2012
Fig. 21.5, Tightening Pattern, 8-Hole Wheels
Pre- and Post-Trip Inspections and Maintenance
21.4