108
General Maintenance
5. Activate the truck and the waterblasting sys-
tem.
6. Turn the charge pump on and ush debris from
the spray bar with low charge pressure water.
7. Once the spray bar is ushed, deactivate the
waterblasting system and shutdown the truck.
8. Apply a light coat of anti-seize to the threads
on the new nozzles.
9. Install the nozzles into the spray bar being
careful not to get any anti-sieze on the seat
area of the nozzle or the spray bar.
10. Tighten each nozzle nger tight. Then torque
each nozzle to 10 ft lbs.
11. Reactivate the truck and the waterblasting
system by following the steps in the Start Up
Procedure.
12. Set the Head Rotation speed dial to 0, then
turn the 40K Clutch switch ON to activate the
ultra high pressure water system.
13. Make sure all personnel are well clear of the
blasting heads, then press the START button
to activate the high pressure system and set
the operating pressure to a safe level. Stay-
ing well clear of the water jets, no closer than
18”, visually inspect the spray pattern of each
nozzle.
14. Conrm at least a 1 inch, needle tight, water
jet is coming from each nozzle.
15. Deactivate the waterblasting system and shut-
down the truck.
16. Replace the spray bar protective cover and
gasket.
Nozzle Pressure Test - All Nozzles Good
Typical Spray Bar & Nozzle
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