Low Air Pressure Indicators - Kalmar THE OTTAWA T2 Manual Del Operador

B
Figure 18
A — Accelerator Pedal
B — Brake Treadle/Pedal
34
Kalmar tractors come equipped with a pneumatic (air) brake
system. This system has two basic parts: the service brakes
and the spring parking brakes.
The service brakes are the part of the system that the driver
uses when he operates the foot-operated treadle valve (or foot
pedal) in the cab (Figure 18).
The service brakes are the primary brakes used by the
operator. The service brakes require air to operate. If there is insufficient air in the system, the service brakes will not
A
operate.
The spring brakes are used for parking the vehicle. They are
also called the parking brakes because the parking brake
control applies the spring brakes. The spring brakes use the
mechanical force of a spring to operate. They do not need air
to operate, but they do need air to be released. If there is a
loss of pressure in the system, these brakes will automatically
apply. This is why the spring brakes are sometimes called
"emergency" brakes. Remember, if there is no air in the
system, the spring (parking) brakes will not fully release.

Low Air Pressure Indicators

When air pressure in the brake system is below 70 P.S.I.
(4.83 bar), the warning buzzer will sound and the Low Air
warning indicator on the dash panel will light up. The air
pressure gauge should indicate low air pressure in the system.
The warning buzzer will shut off after air pressure has reached
70 P.S.I. (4.83 bar) (see page 22).
If the warning light and buzzer do not shut off at least
5 minutes after start-up, shut the engine down and determine
why the air system is not charging.
If the Low Air indicator light or buzzer indicates a loss of air
pressure while driving, the vehicle should be stopped
immediately. The vehicle should not be operated until the air
system is repaired and functioning properly.
Do not operate the vehicle if the air brake system is not
working properly. If the air brakes are not working
properly, have the vehicle repaired immediately by a
qualified technician. Operating a vehicle when the air
brake system is not working properly can result in serious
injury or death.
3 Description and Operation