transmission. It should not be confused with ex-
haust brake or engine brake. Furthermore, the
grade brake should not be used in place of the
service brakes to stop the vehicle.
Chassis equipped with a propane engine may have
an optional grade brake. The grade brake is de-
signed to downshift the transmission—when going
downhill for example—without overspeeding the en-
gine. Refer to the Allison Operator’s Manual for
proper operation of the grade brake. See
Fig. 19.23
for an example of the grade brake switch. An amber
light activates at the top of the switch when the
grade brake is activated.
IGNITION OFF
Park Brake On
Park Brake On
Park Brake Off
IGNITION
ON
Headlamps Off &
Marker Lamps Off &
Park Brake On
Ignition On
02/06/2012 f040800
Fig. 19.17, Ignition Off (shown when ignition is keyed OFF)
Propane Fuel System
19.22
To Next Page
Loading...
