PART 4: CONTROLS AND DISPLAYS GAUGES
(R05/10) Y53-6032 – 63 –
Air Application Gauge
This gauge will show you how much air pressure is being
applied from your foot brake valve or trailer brake hand
valve.
Primary (Secondary) Air Pressure Gauge
(Air Reservoir)
The air pressure gauge indicates the amount of air pres-
sure in the brake system in pounds per square inch (psi).
• The primary gauge shows front reservoir air pressure.
• The secondary gauge shows pressure in the rear res-
ervoir.
Ensure the air pressure registers more than 100 psi in
both service systems before you move the vehicle. If the
pressure in either circuit is too low for normal brake oper-
ation, the warning light will glow and the audible alarm will
sound.
Y53-6032.book Page 63 Monday, May 24, 2010 3:37 PM
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