CONTROLS AND INSTRUMENTS 4-21
PA1633 X3-45 Commuter Operator’s Manual
loss in any system, the driver should pull to the side of the
road as soon as can be safely done and investigate the
situation.
Do not drive the coach when the brake air pressure is low.
06738
Rear Brake Air Pressure Gauge (Primary System)
Indicates the rear brake air system pressure in psi. The normal
operating pressure is from 122 to 140 psi.
The
low air pressure
indicator LED on the gauge and the
STOP
telltale light illuminates when the rear brake air system
pressure drops below 85 psi. An audible alarm will sound.
STOP telltale light
WARNING
The driver is responsible for monitoring the pressure as part
of a regular sweep of the instruments.
In the event of a pressure loss in the primary brake system,
the drive and tag axle service brakes will not function
normally. It is critical to bring the coach to a safe stop as
quickly as possible.
If there is sufficient pressure in the secondary brake
system, modulated spring brake pressure (using the park
brake chambers) will be used to apply the drive axle brakes,
proportional to the braking pressure on the front axle. It must
be noted this is an emergency situation and a significant
amount of secondary air pressure is lost with each
apply/release cycle. The spring brake modulation will only
function two or three times, depending on the amount of
secondary air pressure that was on hand when the primary
brake pressure was lost.
Once the secondary air pressure drops below 60 psig, the
park spring brakes are fully applied and cannot be released
until pressure is restored.
Do not drive the coach when the brake air pressure is low.
Summary of Contents for X3-45 COMMUTER 2018
Page 1: ...OPERATOR S MANUAL X3 45 COMMUTER COACH...
Page 2: ......
Page 3: ...COACH MANUFACTURER X3 45 COMMUTER OPERATING MANUAL March 2018...
Page 4: ...PA1633 MARCH 2018 Featuring REVISION DESCRIPTION DATE FIRST RELEASE 03 2018...
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Page 70: ...4 36 CONTROLS AND INSTRUMENTS PA1633 X3 45 Commuter Operator s Manual...
Page 108: ...5 38 OTHER FEATURES PA1633 X3 45 Commuter Operator s Manual...
Page 116: ...6 8 STARTING AND STOPPING PROCEDURES PA1633 X3 45 Commuter Operator s Manual...
Page 120: ...7 4 SAFETY FEATURES AND EQUIPMENT PA1633 X3 45 Commuter Operator s Manual KIDDE IMAGES...
Page 128: ...7 12 SAFETY FEATURES AND EQUIPMENT PA1633 X3 45 Commuter Operator s Manual...
Page 148: ...8 20 CARE AND MAINTENANCE PA1633 X3 45 Commuter Operator s Manual...
Page 150: ...9 2 TECHNICAL INFORMATION PA1633 X3 45 Commuter Operator s Manual OVERALL DIMENSIONS...
Page 158: ...9 10 TECHNICAL INFORMATION PA1633 X3 45 Commuter Operator s Manual...
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