CONTROLS/INSTRUMENTS
2 - 9
21. Fire Detectors
Lights when fire is detected in the engine com-
partment.
22. Low Fuel Level
Lights when approximately 12 US gallons
(45 liters) remain in the tank. It is recommended
that you do not exceed a distance of 60 miles
(100 km) after light has turned on. Fill tank as
soon as possible.
23. Water Separator
(optional)
Lights when the accumulated water in the diesel
fuel filter/water separator should be drained. See
Water Separator
in section
Care and Mainte-
nance
(page 6-5).
24. Preheating System
(optional)
Lights when preheating system is turned on. For
systems description, refer to page 2-21.
25. Level Low
Lights when level low system is operating (page
2-20).
26. A/C and Heating Compartment Door Ajar
Lights when the A/C-heating compartment door
is ajar.
27. Blank for Additional
Indicator/Warning Light
28. Low A/C Pressure Indicator
Lights when A/C system pressure is too low.
Compressor clutch is disengaged and fan shuts
off.
29. High A/C Pressure Indicator
Lights when A/C system pressure becomes too
high. Compressor clutch will be disengaged, but
compressor fan will remain activated.
30. Blank for Additional
Indicator/Warning Light
31. Primary Air System Pressure Gauge
Indicates air pressure in the primary system.
Normal reading should vary from 95 to 125 psi
(655 - 860 kPa).
32. Secondary Air System Pressure Gauge
Indicates air pressure in the secondary system.
Normal reading should vary from 95 to 125 psi
(655 - 860 kPa).
33. Tachometer
Indicates engine speed in hundreds of revolu-
tions per minute (rpm) and serves as a guide for
proper gear shifting. It also helps the driver in
preventing excessive engine speeds when going
down steep grades, with engine serving as a
brake. Maximum allowable engine rpm is 2450.
34. Transmission Oil temperature Gauge
Indicates temperature of transmission oil. Nor-
mal reading should vary between 160°F and
250°F (70°C and 120°C).
Note:
For vehicles equipped with a transmission
retarder, when retarder is operated for extended
periods, it is possible but still acceptable that
transmission oil temperature rises above 250°F
(120°C) but must not exceed a maximum of
330°F (165°C).
35. Speedometer
The speedometer indicates the vehicle speed.
The odometer indicates the distance driven.
U.S. vehicles:
Miles/Kilometers
(Miles predominant)
Canadian vehicles: Kilometers/Miles (Kilome-
ters predominant)
Note:
Do not refer to dashboard instruments
during adjustment procedures. Use calibrated
gauges.
