User Manual

SERIES 50 OPERATOR'S GUIDE
Figure 6 Typical Cruise Control
Switches
Cruise Control may a lso be
programmed to permit fast idle
using the cruise control switches.
Wi th the engine at normal id le,
transmission in neutral and service
brakes on, turn on the cruise control
“ON/OFF” switch, and use the
“Resume” switch. The engine rpm
should increase to a pre-defined
speed. The engine rpm can be raised
or lowered from this point using t he
“Set” and “Resume” switches.
Cruise Con trol will maintain the set
speed under normal road and load
conditions.
LOSS OF VEHICLE CONTROL
To avoid injury from the loss of
vehicle control, do not use cruise
control under these con ditions:
□ When it is not possible to
keep the vehicle at a constant
speed (on winding roads, in
heavy traffic, in trafficthat
varies in speed, etc.).
□ On slippery roads
(wet pavement, ice-or
snow-covered roads, loose
gravel, etc.).
NOTICE:
When descending a hill with
cruise control OFF, do not allow
the engine to exceed 2,500 rpm
under any conditions. Failure to
observe this precaution can result
in overspeeding and serious engine
damage.
Cruise Control cannot limit vehicle
speeds on down grades if available
engine braking effort is exceeded, nor
can it maintain speed on upgrades if
power requirements exceed engine
power capability.
All information subject to change without notice. (Rev. 01/04) 25
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION