completely or it will be necessary to prime the
fuel system before the vehicle can be started
again.
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, pos-
sibly resulting in personal injury or property
damage. When working on a fuel system, have a
fire extinguisher within easy reach.
Drain any water collected in the fuel/water separator.
Headlight High-Beam Indicator
The blue high-beam indicator light (sideways beam
icon) illuminates when the headlight high beams are
on.
Cruise Control Indicator
A green indicator illuminates when the cruise control
is activated.
Low Air Pressure Warning
The red low air pressure warning light (pressure
circle icon) and emergency buzzer activate when the
engine is turned on if air pressure in the primary or
secondary air reservoir is below 65 to 75 psi (448 to
517 kPa), and remain on until air pressure rises
above that level in both reservoirs.
The warning light and buzzer also activate during
operation whenever air pressure in the primary or
secondary air reservoir falls below 65 to 75 psi (448
to 517 kPa).
Right-Turn Signal Arrow
The green right-turn signal arrow flashes on and off
whenever the outside right-turn signal lights are
flashing.
Both turn signal arrows flash when the hazard warn-
ing flasher is turned on.
Emergency Buzzer
The emergency buzzer sounds during the ignition
sequence and whenever one of the following condi-
tions exists:
•
The engine oil pressure falls below the preset
level shown in
Table 3.1.
•
The coolant temperature rises above the pre-
set level shown in
Table 3.2.
•
The air pressure falls below the preset level,
which is 65 psi (448 kPa).
•
The parking brake remains set with the vehicle
moving at a speed greater than 2 miles per
hour.
Optional Indicator Lights
The optional indicator lights that are available in-
clude: intake heater on indicator, low brake fluid
warning, low coolant warning, low fuel warning, auto-
matic transmission range inhibit warning, differential
lock warning, and wheel spin indicator.
Air Filter Indicator
The optional amber air filter indicator light (AIR FIL-
TER legend) illuminates when the air cleaner filter
element is clogged, restricting the intake air flow. See
Table 3.3.
If the air filter indicator light is steadily illuminated for
any period of time, check the air intake restriction
gauge. If needed, replace the air filter, and reset the
air intake restriction gauge.
Air Intake Maximum Restriction Values (inH
2
O)
Engine
Pre-EPA07
Engines
EPA07 and
Newer Engines
Cummins 25 25
Mercedes-Benz 22 22
Table 3.3, Air Intake Maximum Restriction Values
(inH
2
O)
IMPORTANT: Never attempt to clean the air fil-
ter.
Alternator No Charge Indicator
The optional amber alternator no charge indicator
light (NO CHARGE legend) illuminates when the al-
ternator is not charging properly.
Instruments
3.8
To Next Page
Loading...
