8
Water System Operation
and Maintenance Manual
Procedure to Air Purge the Water System
Serial Numbers up to 0292655
1. Drain all water from water tanks.
2. Remove nozzle from sewer hose.
3. Start auxiliary engine.
4. Start truck chassis engine.
5. Turn top sewer hose control valve and bottom pump control valve on the front hose reel to the
ON
position.
6. Turn air purge valve on left side of the water pump to the
OPEN
position.
7. Allow air to push water from hose.
8. When hose is free of water, rotate hose reel clockwise until all water is drained out.
9.
CLOSE
air purge valve and turn
OFF
bottom water pump control valve and top sewer hose control
valve.
10. Remove handgun and plug from the handgun connection.
11. Turn
ON
handgun valve.
12. Turn
ON
bottom pump control valve.
13.
OPEN
air purge valve and wait for all water to be blown from handgun system.
14. Turn
OFF
bottom pump control valve.
15. Tune
OFF
handgun valve.
16.
CLOSE
air purge valve.
17.
OPEN
debris body flushout valve.
18. Turn
ON
bottom pump control valve.
19.
OPEN
air purge valve and wait for all water to be blown from water system hoses.
20. Turn
OFF
bottom pump control valve.
21.
CLOSE
debris body flushout valve.
22.
CLOSE
air purge valve.
23.
OPEN
drain valves at water pump.
24.
OPEN
air purge valve and wait for all water to be blown out of pump.
25.
CLOSE
air purge valve.
26. Shut
OFF
auxiliary engine.
27. Shut
OFF
truck chassis engine.
28. Remove drain caps from water system bulkhead fittings under bumper, curb side.
29. NOTE: Store unit with all the water system ball valves in the
ON
position.
CAUTION: Water freezes at 32 degrees F. If at all possible try to store unit in an area above this
temperature.
IF ABOVE PROCEDURE IS FOLLOWED, UNIT SHOULD BE FREE OF WATER.
