26
Trouble-shooting or clearing fault codes
is performed at the EC module mounted
in the left front wheel well.
TRACTION CONTROL
Automatic traction control (A.T.C.) is
available as an option on trucks equipped
with the Antilock Braking System. When
activated, the A.T.C. active/warning lamp
will be on and the system will limit wheel
spin during hard acceleration. The system
is activated by turning on the A.T.C. en-
able/disable switch located on the dash.
During activation, the warning lamp will
blink to advise the driver that drive-wheel
spin is occurring.
A.T.C. can be disabled while the vehicle is
stationary or in motion. However, A.T.C.
will not re-enable until the vehicle comes
to a complete stop, even with the switch
turned to the enable position.
Danger - Never operate
the vehicle if the truck
or trailer A.B.S. warning
(indicator) lights remain
illuminated.
PARKING BRAKE
Otttawa tractors are equipped with spring
brakes of parking. The parking system is
operated manually by a cab mounted
parking brake control valve (Fig 1) (Also
see page 21, Items 6 and 7)
The purpose of the parking (spring) brakes
are to hold the vehicle while in the parked
position.
(RED)
(YELLOW)
WARNING-Never apply
the parking brake during
normal driving. Doing this
will lock the rear wheels,
possibly causing an uncontrolled
stop.
PARKING BRAKE AND TRAILER
AIR SUPPLY CONTROLS
NOTE - Air pressure in the system must be at
least 70 P.S.I. before the Parking Brake Control
or the Trailer Air Supply Control can be pushed
in (releasing the spring brakes).
NOTE - If the tractor air system is completely
discharged, the Trailer Parking Brake Controls
will be applied. The trailer parking brake
should not be released until the tractor brakes
are rolling.
Figure 1
Parking Brake and Trailer
Air Supply Controls
MANUALLY
RELEASING
TRACTOR SPRING
BRAKES (CAGING)
When air pressure in the system drops be-
low approximately 43 P.S.I., the spring
Operation
Содержание Ottawa
Страница 1: ......
Страница 17: ...16 Operation...
Страница 40: ...39 Figure 1a Standard fuse con guration Figure 1b QSB fuse con guration Figure 2 Relay Location Operation...