101
General Maintenance
4. Remove the spray bar covers.
5. Place a straight edge across the bottom of the
wheels and below the spray bar to simulate
the pavement surface. Measure from the dis-
tance from the straight edge to the spray bar
to determine the stando distance.
6. Remove the safety pins and turn the adjust-
ment handles to raise or lower the castor
wheels to achieve the desired distance from
the straight edge to the spray bar. Remember
that 1.5” (46 cm) is the standard stando
distance. Increase the distance if required to
clear road obstacles. Make sure to turn each
handle the same number of revolutions to keep
the blast heads level.
7. Cross check the measurement by placing the
straight edge across the other wheels. Read-
just the castor wheels as required to level the
blast heads.
8. Before starting operations, conrm proper
clearance by moving the blast heads slowly
over a typical obstacle in the pavement on the
current job while monitoring the clearance.
Make additional adjustments if necessary.
9. Be alert for obstacles that are higher than the
stando clearance during removal operations.
You must be prepared to avoid the obstacle or
stop the truck and adjust the stando distance
to provide additional clearance.
• It is never acceptable to pass over obstacles in
the pavement surface that are high enough to
hit the shroud. Pavement obstacles can cause
severe damage to blast head components.
• Never allow the blast heads to pass over de-
bris.
• Never allow the blast heads to pass over
equipment or markers that can be damaged
by the shroud, spray bars or the blast from
the water jets.
• Always perform a test pass at the start of each
job to conrm adequate stando clearance
before beginning normal removal operations.
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