Air Intake Restriction Gauge; Ambient Temperature Gauge - freightliner BUSINESS CLASS M2 Driver Manual

Instruments

Air Intake Restriction Gauge

The air intake restriction gauge indicates the vacuum
on the engine side of the air cleaner. On standard
installations, it is mounted on the air intake duct in
the engine compartment. As an option for easier
viewing, the air intake restriction indicator (see
Fig. 3.5) can be mounted on the dash, usually on the
right-hand control panel.
10/10/2001
Fig. 3.5, Air Intake Restriction Indicator
NOTE: Rain or snow can wet the filter and
cause a temporary high reading.
Air intake restriction vacuum is measured in inches
of water (inH O). For vehicles equipped with a
2
graduated indicator or a restriction gauge on the
dash, check the gauge with the engine off. If the yel-
low signal stays locked in the red zone once the en-
gine is shut down, or is at or above the values
shown in Table 3.2, the air cleaner element needs to
be replaced.
Vehicles may be equipped with a go/no-go restriction
indicator without graduations (see
a graduated indicator.
Air Intake Maximum Restriction Values (inH
Pre-EPA07
Engine
Engines
Caterpillar
Cummins
3.9
f610568
Fig. 3.6) instead of
O)
2
EPA07 and
Newer Engines
25 —
25 25
Air Intake Maximum Restriction Values (inH
Pre-EPA07
Engine
Engines
Detroit ™
Mercedes-Benz
Table 3.2, Air Cleaner Element Maximum Restriction
04/08/2005
Fig. 3.6, Manual-Reset Air Restriction Indicator, Go/

Ambient Temperature Gauge

The ambient temperature gauge, shown in
displays the in-cab or outside temperature, depend-
ing on the settings selected.
SET
IN
12/14/2011
Fig. 3.7, Ambient Temperature Gauge
When the alarm is enabled, the ambient temperature
gauge will sound an audible alert and the amber
2
EPA07 and
Newer Engines
20 22
22 22
f090431
No-Go
Fig.
ADJ ALARM
OUT
f611153
O)
3.7,