Operating Water Blaster
Task Step Key Points
Perform a pre-
start check.
1. Perform pre-start check of
the water blaster.
ACTIVITY
Complete the Water Blaster pre-
start check list section of the
Vacuum Excavator
Lay out pressure
hose and attach
water gun
1. Set up water pressure
hose and gun.
Uncoil water pressure hose from the
machine and lay it out on the ground.
Ensure that no kinks are made in the
hose.
Attach the water gun to the end of the
hose using the quick connect fittings.
Start the engine. 1. Start the engine in order
to provide power to drive
the high pressure water
pump.
Start the trailer engine as detailed in the
“Vacuum Excavation” operating
instructions. Allow the engine to warm up.
Bring engine speed up to full.
Water Blasting 1. Wear correct Personal
Protective Equipment
(PPE).
The operation of water blasting can
generate blow back of high velocity
particles.
The operator & persons nearby shall
wear: -
Face shield
Ear plugs or muffs
Industrial clothing or overalls
Closed in footwear
2. Engage the water pump
via the control panel.
Engage the water pump by switching the
electric clutch to the “On” position on the
control panel.
3. Operate the trigger on the
water gun.
Operate the trigger on the water gun to
commence blasting operations.
4. Water blast at the correct
angle to exposed face.
The water blasting action will work best if
performed at a slight angle from the
vertical and “biting” away slowly from the
exposed face.
5. DO NOT water blast
people or animals.
DANGER!!!
Water blasting can cause injury
to persons.
DO NOT water blast any part of a
person’s body or use it to wash.
6. Do not run water pump
dry.
Always ensure that there is adequate
water in the water tank prior to operation
of the water blaster. Damage will occur to
the water pump if it is run dry.
7. Shut down water pump
when water blasting has
been completed.
If no further water blasting is going to
occur for a period of time, shut down the
water pump by switching the electric
clutch to the “Off” position.
Damage will occur to the water pump if no
flow occurs for an extended period of
time.
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