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Scheduled Maintenance
6. Inate the debris door seal and activate the
vacuum system with the valves open for sev-
eral minutes to remove any residual moisture
from valves, hoses, lter canister, blower and
silencer.
7. Shutdown the vacuum system and close all
valves and access doors.
High Pressure Water system Winterizing
There are two options available for winterizing the
high pressure water system. Drain all clean water,
debris and vacuum tanks, pumps and hoses (Op-
tion 1) or drain the tanks and circulate a 50/50
mixture of antifreeze through the remainder of
the system (Option 2).
Completely draining the system may be less desir-
able for trucks used in daily operations. Since all
water is drained from the system, it will be neces-
sary to prime the charge water system and purge
air from the UHP pump when the waterblasting
system is restarted. However, this option is usually
the best choice for equipment that will be stored
for an extended period in cold climates.
Circulating anti-freeze through the system is
preferred by many operators for trucks operating
daily during freezing weather because startup and
shutdown procedures are quicker. GLYCOL based
windshield washer or RV potable water system
antifreeze is circulated through the system to
protect components from freezing.
Winterizing Option 1 - Draining the
System
Use this option when antifreeze is not available or
when the equipment will be stored for an extended
period in below freezing temperatures.
Use the following steps to completely drain
the water from the system:
1. Make sure the truck is parked on level ground
and that the waterblasting system is shutdown
with the truck in the service position.
2. Make sure the vacuum system is properly
winterized, then drain the clean water tanks
completely.
3. Open the clean water system winterizing valve
mounted on the chassis below the tanks to
remove the water from the equalizing hoses
and other clean water hoses and ttings that
are below the tank drain valves.
Typical Clean Water Tank Main Drain Valve
Clean Water Tank Winterizing Drain Valve
Charge Water Pump & Drain Valve
CHARGE
WATER
PUMP
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