NOTE: Avoid opening the air cleaner and disturb-
ing the seals or filter element until the yellow sig-
nal stays locked at or above the value shown in
Table 3.3. When this occurs, the air cleaner needs
replacing; however, immediate engine shutdown is
not necessary.
Intake-Air Restriction
Engine Model
*
Service at or Above
Cummins 25 inH
2
O
*
Turbocharged engines must be checked at full load and governed engine
speed.
Table 3.3, Intake-Air Restriction
10/01/98
f601437a
Fig. 3.20, Air Pressure Gauge
10/01/98
f601438a
Fig. 3.21, Fuel Gauge
Driver Controls and Instruments
3.16
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