Freightliner FLA/FLB/FLC/FLD/FLL. Manual — part 9
Spring-Tension Type
On belts equipped with a spring tensioner, the belt
tension is automatically adjusted. Check that the ten-
sioner is holding tension on the belt by inserting the
end of a breaker bar in the 1/2-inch square hole on
the forward face of the tensioner, and rotating the
tensioner down, away from the belt. When the
breaker bar is slowly released, the tensioner should
return to its original position. If not, see Group 01 of
the
Heavy-Duty Trucks Service Manual
for replace-
ment instructions.
Drive Belt Tensions
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)
f150010a
A
B
C
D
E
F
11/21/94
A. Glazing
B. Separating Layers
C. Streaked Sidewalls
D. Tensile Break
E. Uneven Ribs
F.
Cracks
Fig. 5, Drive Belt Replacement Conditions
Engine
01
Heavy-Duty Trucks Maintenance Manual, January 2007
01/4
Drive Belt Tensions
Engine
Component
Belt Tension:
lbf (kg)
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 54)
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 2, Drive Belt Tensions
Engine
01
Heavy-Duty Trucks Maintenance Manual, January 2007
01/5
Title of Maintenance Operation (MOP)
MOP Number
Air Cleaner Element Inspecting and Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 09–01
Air Intake
09
Index, Alphabetical
Heavy-Duty Trucks Maintenance Manual, February 2004
09–01 Air Cleaner Element
Inspecting and
Replacing
Method 1
Replace the air cleaner element at the recommended
interval or when the air restriction indicator reaches
20 inH
2
O on a vehicle with a Detroit Diesel engine,
22 inH
2
O on a vehicle with a Mercedes-Benz engine,
or 25 inH
2
O on a vehicle with a Caterpillar or Cum-
mins engine. For replacement instructions, see
Group 09 of the
Heavy-Duty Trucks Service Manual
.
Reset the air restriction indicator.
If the maximum restriction is not reached, record the
air restriction value. If the value is higher than the
previous recording, reset the air restriction indicator.
If the value is lower than the previous recording, in-
spect the air cleaner and air cleaner element of
cracks, leaks, or any other damage.
If the air cleaner or air cleaner element is damaged,
replace it and reset the air restriction indicator.
Method 2
Replace the air cleaner element at the recommended
interval or when the air restriction indicator reaches
20 inH
2
O on a vehicle with a Detroit Diesel engine,
22 inH
2
O on a vehicle with a Mercedes-Benz engine,
or 25 inH
2
O on a vehicle with a Caterpillar or Cum-
mins engine. For replacement instructions, see
Group 09 of the
Heavy-Duty Trucks Service Manual
.
Reset the air restriction indicator.
If the maximum restriction is not reached, inspect the
air cleaner and air cleaner element for cracks, leaks,
or any other damage. If the air cleaner or air cleaner
element is damaged, replace it and reset the air re-
striction indicator.
Air Intake
09
Heavy-Duty Trucks Maintenance Manual, February 2004
09/1
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