PREVOST X3-45 COMMUTER User Manual

SECTION 12: BRAKE AND AIR SYSTEM
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 12 revised Jan 2021
1
CONTENTS
SECTION CHANGE LOG .................................................................................................................................................. 4
1. TORQUE TABLES.................................................................................................................................................... 5
1.1 BRAKE AND AIR SYSTEM ................................................................................................................................ 5
1.2 MISCELLANEOUS TORQUES .......................................................................................................................... 6
2. AIR SYSTEM ........................................................................................................................................................... 8
3. BRAKES .................................................................................................................................................................. 8
4. AIR TANKS ............................................................................................................................................................. 8
4.1 WET TANK AUTOMATIC DRAIN VALVE .......................................................................................................... 8
4.1.1 Installation ............................................................................................................................................. 8
4.2 MAINTENANCE .............................................................................................................................................. 9
4.2.1 Wet Air Tank .......................................................................................................................................... 9
4.2.2 Primary Air Tank .................................................................................................................................... 9
4.2.3 Emergency/Parking Brakes Overrule Air Tank ....................................................................................... 9
4.2.4 Ping Tank................................................................................................................................................ 9
4.2.5 Accessory Air Tank ............................................................................................................................... 11
4.2.6 Secondary Air Tank .............................................................................................................................. 11
4.2.7 Kneeling Air Tank ................................................................................................................................. 11
5. EMERGENCY AIR SYSTEM FILL VALVES .............................................................................................................. 12
6. ACCESSORY AIR FILTER ....................................................................................................................................... 13
6.1 ACCESSORY AIR FILTER DRAIN ..................................................................................................................... 13
6.2 ACCESSORY AIR FILTER ELEMENT REPLACEMENT ...................................................................................... 13
7. AIR GAUGES (PRIMARY, SECONDARY AND ACCESSORY) .................................................................................. 14
8. AIR DRYER ........................................................................................................................................................... 14
8.1 REPLACING THE DESICCANT CARTRIDGE..................................................................................................... 18
9. HALDEX CONDENSER - SEPARATOR ................................................................................................................... 20
9.1 PERIODIC INSPECTION ................................................................................................................................. 20
10. AIR LINES ......................................................................................................................................................... 20
10.1 NYLON TUBING ............................................................................................................................................ 21
10.2 FLEXIBLE HOSES ........................................................................................................................................... 21
10.3 AIR LINE OPERATING TEST ........................................................................................................................... 21
10.4 AIR LINE LEAKAGE TEST ............................................................................................................................... 21
10.5 MAINTENANCE ............................................................................................................................................ 21
11. AIR COMPRESSOR ........................................................................................................................................... 22
11.1 COMPRESSOR REMOVAL AND INSTALLATION ............................................................................................ 22
12. MISCELLANEOUS VALVES ............................................................................................................................... 23
12.1 EMERGENCY / PARKING BRAKE CONTROL VALVE (PP-1) ............................................................................ 26
12.2 EMERGENCY / PARKING BRAKE OVERRULE CONTROL VALVE (RD-3) ......................................................... 26

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in