Jacobs Extardm Compression Brake - Fleetwood 1999 Discovery Parts And Service Manual

• Select Neutral, return to operation*
*- If the condition is temporary, the do not shift light will
not come back on and your vehicle will operate in a
normal manner.
- If the condition is not temporary, the do not shift light
will come back on and the transmission may stay in
Neutral, operate in only the lower gears, or operate ina
normal manner. The type of operation permitted by the
ECU will depend on the type of condition.
- Have the transmission checked at the earliest
opportunity.
The Jacobs Extarder only applies to vehicles equipped with
the Allison MD-3060 six speed automatic transmission.
Important: The Jacobs Extarder Compression Brake is a
vehicle slowing device, not a vehicle stopping device. It is
not a substitute for the vehicle service brakes. Use of the
Extarder Compression Brake for vehicle downhill control
and slowing down on level terrain will allow the service
brakes to remain cool and ready for any emergency.
OPERATION
To get the best result from the Extarder compression brake, it
is necessary to observe several simple operating principles.
The Extarder.compression brake is activated when the fol-
lowing conditions are satisfied.
1. The Extarder dash ON/OFF switch is in the on position.
2. The engine is not being fueled (foot off the throttle pedal).
OJ,24
JACOBS EXTARDER
COMPRESSION BRAKE
Discovmy