Kalmar Ottawa Operator's Manual - page 26
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braking ability of the tractor trailer
combination and creates a serious
hazard. This increases the possibil-
ity of an accident and could result
in serious injury or death.
WARNING - Never oper-
ate the vehicle when
system air pressure is
below 70 P.S.I. There may
not be enough air in the system to
stop or slow the vehicle. Have the
brake system checked by a certi-
fied air brake mechanic if there is
any doubt about the brake system
performance.
A.B.S.
Some trucks may be equipped with the
Antilock Braking System (A.B.S.). The
A.B.S. system is designed to prevent wheel
lock up during hard braking.
Trucks equipped with A.B.S. have an indi-
cator light located in dash panel number
one. The indicator light will warn the
operator if there is a potential problem in
the system.
Trucks should not be operated if the in-
dicator light is on. Contact your nearest
Kalmar dealer for qualified service on the
A.B.S. system.
Trucks built with A.B.S. after March of
2002 will have the capability to check
the trailer for a properly operating system.
After connecting a trailer to the truck, the
system will run a diagnostics check. If a
problem is detected with the trailer side of
the A.B.S. system, a trailer warning indica-
tor light on the dash will illuminate.
While the engine is running, the air
compressor replenishes the brake system
air supply. This air supply provides the
pressure necessary to operate the service
brakes.
The service brakes require at least 70
P.S.I. to operate effectively. If the system
is not up to at least 70 P.S.I., there may
not be enough air in the system to stop
the vehicle. Several hard brake applica-
tions can quickly deplete the pressure in
the air system and could possibly cause
the pressure to drop below 43 P.S.I.. If this
happens the spring brakes will apply au-
tomatically, possibly causing the operator
to loose control of the vehicle.
The service brake system is integrated
with the parking brake system. Should the
service brake system fail because of a lack
of air pressure (below 43 P.S.I.), the spring
brakes will automatically be applied for
emergency braking.
WARNING - Rapid suc-
cessive brake application
and release, sometimes
referred to as “fanning” or
“pumping” the brakes, should be
avoided. This is an inefficient way
to slow or stop a vehicle with air
brakes and may use up all of the
air in the system before the vehicle
is stopped or slowed completely.
This could result in serious injury or
death.
WARNING - Always
connect both trailer air
lines when towing a trailer.
Failure to connect both the trailer
service (BLUE), and the trailer sup-
ply (RED) air lines greatly reduces
Operation