8. Start the engine and charge the air system to the governor cutout point.
9. Make sure the SYSTEM PARK control, TRAILER AIR SUPPLY, and
TRACTOR PARK controls are applied, if present.
10. Turn off the engine.
11. Open the drain cock and drain the front service reservoir.
12. Check if the items in Step 7 function normally. If any do not work, replace
the stoplight switch. Refer to “Stoplight Switch” in “On-Vehicle Service.”
13. Start the engine and charge the air system to the governor cutout point.
14. Make sure the brakes operate properly.
15. See the parking brakes and remove the blocks from the wheels.
Air Brake System
32
Revised 11/15/99
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