Mack LEU, Operator'S Handbook Manual

Page: 23 / 59

INSTRUMENTS AND CONTROLS 19
Methane Detector/Alarm System
In addition to the methane detector located in the cab, there is another methane
detector located in the "doghouse" under the cab as shown in the following illustration.
C0032253
The methane alarm/detection system runs off the battery and is active at all times
unless the battery is disconnected.
DANGER
If the battery is disconnected, the
methane detector/alarm system will not
operate.
DANGER
In the event the methane alarm red
light comes on and the alarm sounds,
the cab windows should immediately
be opened, the vehicle should be safely
stopped and turned off, and personnel
should exit the cab. Follow safety
precautions in the SAFETY section of
this manual.
Frosted LNG tank(s), other than around the area of the rear fuel tank door and
plumbing fixtures, indicates that the inner tank is leaking into the outer tank. The
appearance of a vapor cloud accompanied by a hissing noise may also indicate a
methane leak. A leaking condition requires service on the tank(s) before the vehicle
can be operated.
WARNING
Do NOT operate a vehicle which has a
methane leak.