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Scheduled Maintenance
Dirt Shield
Button Seal
Apply Anti-Seize
Shroud Installed
Spray Bar & Dirt Shield Components
Dirt Shield & Felt Seal
Typical Spray Bar Button Seal
5.15 Shroud Installation
If the shroud becomes damaged, it must be re-
placed following the steps outlined in this section.
Removing the shroud:
1. Raise the Hog Arm and blasting heads to the
full up position and lock them with the safety
pin.
2. Make sure the waterblasting system is shut-
down with the truck in the service position.
3. Remove the vacuum hose from the shroud.
4. Remove the spray bar protector.
5. Hold the thru-shaft with a 3/4” (19 mm)
wrench inserted in the slot at the base of the
thru-shaft motor to prevent it from turning.
6. Turn the spray bar counterclockwise by hand
until it is free of the shaft.
7. Remove Brass button.
8. Use a stainless steel wire brush to clean the
dirt from the thru-shaft threads.
9. While still holding the thru-shaft with the
wrench, remove the dirt shield by turning it
counterclockwise.
10. Remove felt seal. Then clean the dirt shield
and shroud.
11. Loosen and remove the bolts holding the
shroud in place.
12. Remove the shroud from the blast head.
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