Terex TS14G, Maintenance Manual

Page: 160 / 376

Section 190-0270
Electrical System - Switches and Sensors
SM 2286 04-04
4
* * * *
Air Pressure Gauge (3, Fig. 3) -
Indicates air reservoir
pressure. During normal operation, the needle in this
gauge should be showing in or approaching the centre
of the green zone. Do not operate the vehicle if the
needle remains in the red zone.
WARNING
Never release the parking brake or move the
vehicle until the needle is at least approaching
the centre of the green zone.
Low Air Pressure Switch (1, 2 & 10) - There are 3
normally open (NO) pressure switches located in air
system. One located in port '4' of the manifold plate
and two in the treadle valve. The switches send a
signal to illuminate low brake air pressure warning light
(15, Fig. 3) if there is a loss of air pressure in the
following circuits:
Switch (10) - Park/emergency brake circuit air pressure
falls below 5.5 bar (80 lbf/in²).
Switch (1) - Front service circuit air pressure falls
below 4.1 bar (60 lbf/in²).
Switch (2) - Rear service circuit air pressure falls below
4.1 bar (60 lbf/in²).
If the warning light illuminates, stop the machine, apply
the parking brake and investigate the cause.
Air Cleaner
Air Cleaner Restriction Gauge (14) -
Mounted
externally on the air cleaner pipes, the restriction
gauge indicates the degree of air cleaner element
restriction as the red band rises in the gauge window.
The filter elements should be replaced if the red band
locks in place when the engine is shut down. Reset
the gauge by pressing the button on the gauge with
the engine running.
Courtesy of Machine.Market