Thomas SAF-T-LINER C2, Maintenance Manual

Page: 112 / 176

18. Connect and tighten the three air lines. Connect
the harness connector to the heater and thermo-
stat assembly until the lock tab snaps in place.
19. Start the engine, build the air pressure, and
check the air brake system for leaks. If any air
leaks are present, see
Group 42 of the Saf-T-
Liner C2 School Bus Workshop Manual for diag-
nosis and repair information.
AD–IP Air Dryer
1. Park the vehicle on a level surface and apply the
parking brake. Shut down the engine. Chock the
tires.
2. Completely drain all air reservoirs. Air pressure
gauges should read 0 psi (0 kPa).
IMPORTANT: The compressor discharge line
may contain residual air pressure.
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16
1. 5/16 x 4-1/2-Inch Upper
Mounting Bracket Bolt
2. Upper Mounting Bracket Strap
3. 5/16-Inch Lockwasher
4. 5/16-Inch Nylok® Nut
5. Upper Mounting Bracket
6. Housing
7. Nylok Nut
8. 3/8-Inch Special Washer
9. Desiccant Cartridge
10. O-Ring
11. Drain Valve
12. Lower Mounting Bracket
13. 3/8-Inch Bolt (long)
14. Check Valve Assembly
15. Purge Valve Assembly
16. Purge Valve Capscrew
17. Exhaust Diaphragm
18. Purge Valve
19. 1/4-Inch Screw
20. Purge Valve Housing
21. Heater and Thermostat
Housing
22. Return Spring
23. Purge Piston
24. 3/8-Inch Bolt
25. End Cover
Fig. 1, AD-9 Air Dryer
Brakes
42
Saf-T-Liner C2 School Bus Maintenance Manual, November 2020
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