Freightliner Century Class. Manual — part 7
01–03 Engine Mount Inspection
(Noise Emission
Control)
NOTE: At engine overhaul, and whenever the
engine has been removed, inspect the lower
and upper isolators (see
, Refs. 1 and 6),
and replace them if they are worn. See Group
01 of the Century Class Trucks Workshop
Manual for procedures.
Drive Belt Tension
Engine
Component
Belt Tension: lbf (kg)
Caterpillar C10 (3176)
Refrigerant Compressor
80 to 100 (36 to 45)
Caterpillar 3406E
Alternator and Refrigerant Compressor
40 to 50 (18 to 23), per belt
Fan
80 to 100 (36 to 45)
Cummins M11
Alternator
90 to 120 (41 to 55)
Fan
155 to 165 (70 to 75)
Refrigerant Compressor
80 to 100 (36 to 45)
Cummins N14
Alternator
40 to 50 (18 to 23), per belt
Fan
80 to 120 (36 to 55)
Refrigerant Compressor
80 to 100 (36 to 45)
Detroit Diesel Series 60
Alternator and Refrigerant Compressor
80 to 100 (36 to 45), Power Band
Fan
60 to 80 (27 to 36)
Table 1, Drive Belt Tension
Periodically inspect the rubber isolators for cracks,
cuts, wear, or damage, and replace them if neces-
sary. See Group 01 of the Century Class Trucks
Workshop Manual for isolator replacement
procedures.
01–04 Engine-Support
Fasteners Check (Noise
Emission Control)
Front and rear engine supports for vehicles built from
January 2007 require no periodic maintenance.
Mounts should be inspected when the engine is re-
moved for service. For vehicles manufactured prior to
January 2007, perform the following check.
Check the rear engine-support fasteners (see
Ref. 4) for tightness. Tighten the 3/4-inch fasteners
215 to 265 lbf·ft (292 to 359 N·m).
f220047a
1
2
3
4
5
6
2
10/05/94
1.
Lower Isolator
2.
Engine-Support
Washer
3.
3/4–10 Capscrew
4.
3/4–10 Hexnut
5.
Engine Mount
6.
Upper Isolator
Fig. 3, Rear Engine Mount Isolators and Fasteners
Engine
01
01/3
Check the front engine-support fasteners for tight-
ness. Tighten the 5/8-inch fasteners 125 lbf·ft (170
N·m).
NOTE: At engine overhaul, and whenever the
engine has been removed, inspect the lower
and upper isolators (see
, Refs. 1 and 6),
and replace them if they are worn; this applies
to both the front and rear isolators. See Group
01 of the Century Class Trucks Workshop
Manual for procedures.
Engine
01
01/4
MOP Number
Air Cleaner Element Inspection and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 09–01
Air Intake
09
Index, Alphabetical
09–01 Air Cleaner Element
Inspection and
Replacement
Restriction of air flow through the air cleaner element
is measured at the tap in the air cleaner outlet.
Check the restriction indicator at the air cleaner or in
the cab if the vehicle is equipped with a dash-
mounted restriction gauge.
Vehicles may be equipped with either a manual-reset
restriction indicator with graduations (
), or a
go/no-go restriction indicator without graduations
(
1.
Inspect the air restriction indicator to see if air
restriction equals or exceeds the maximum al-
lowable restriction. For instructions, see the ve-
hicle Driver’s Manual.
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 ve-
hicle.
2.
If necessary, replace the air cleaner element. For
air cleaner element replacement instructions, see
Group 09 of the vehicle Workshop Manual.
3.
Inspect the air cleaner housing for cracks, leaks,
or any other damage. If the air cleaner housing
or element is damaged, replace it.
4.
Reset the air restriction indicator.
5.
Each time the air cleaner housing is replaced,
perform the procedures in MOP 13–01.
08/07/2007
f090452
Fig. 1, Manual-Reset Air Restriction Indicator,
Graduated
04/08/2005
f090431
Fig. 2, Manual-Reset Air Restriction Indicator, Go/
No-Go
Air Intake
09
09/1
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