TM 9-2320-283-10
KEY TO INSTRUMENT CLUSTER (Continued)
6
AIR PRESSURE GAGE
C A U T I O N
P r e s s u r e s b e l o w t h e n o r m a l o p e r a t i n g r a n g e
indicate a loss in air supply. This will result
i n a l i m i t e d n u m b e r o f t i m e s t h e b r a k e s c a n
be applied before losing front wheel brakes.
At the first sign of pressure loss or if excessive pres-
sure is noted, STOP THE TRUCK AND INVESTI-
GATE THE CAUSE.
Registers air pressure (in psi) in the front brake
system. Normal operating range is 105-140 psi.
7
LOW AIR PRESSURE WARNING LAMP
CAUTION
I f t h i s l a m p c o m e s o n a b u z z e r s o u n d s
w h i l e y o u a r e d r i v i n g , s t o p i m m e d i a t e l y a n d
investigate the cause.
Red warning lamp will light and buzzer will sound
when either front or rear air system pressure is
between 64 to 76 psi and below.
8
AIR PRESSURE GAGE
C A U T I O N
P r e s s u r e s b e l o w t h e n o r m a l o p e r a t i n g r a n g e
i n d i c a t e s a l o s s i n a i r s u p p l y a n d w i l l r e s u l t
i n a l i m i t e d n u m b e r o f t i m e s t h e b r a k e s c a n
be applied before the forward rear axle emer-
g e n c y p a r k / s p r i n g b r a k e s a r e a u t o m a c t i c a l l y
a c t i v a t e d . A t t h e f i r s t s i g n o f p r e s s u r e l o s s
or lift excessive pressure is noted STOP THE
T R U C K A N D I N V E S T I G A T E T H E C A U S E .
Registers air pressure (in psi) in the rear brake system.
Normal operating range is 105-140 psi.
TA 236639
2-7
