148
Scheduled Maintenance
6. While the charge pump is running, open the
discharge valve on the charge water pump for
2 or 3 seconds, then close the valve.
7. Immediately repeat step 6 while monitoring
the charge water pressure gauge in the joy-
stick console.
8. If pressure does not rise to the normal charge
water pressure range within a few seconds,
repeat step 3 until pressure rises to the normal
range (60 psi - 4 BAR).
9. Turn the charge pump OFF when the clean
clear water is owing from the thru-shafts in-
dicating that all air and debris has been ushed
from the system.
10. Follow the spray bar install procedure to rein-
stall and test the spray bars.
TO REACTIVATE A TRUCK THAT HAS BEEN WINTERIZED BY
DRAINING THE SYSTEM IN FREEZING CONDITIONS, ALL LOW
FITTINGS AND HOSES WHERE WATER CAN ACCUMULATE
AND FREEZE AFTER DRAINING MUST BE HEATED TO THAW
THE ICE. ALSO PURGE ALL AIR FROM THE SYSTEM USING
THE CHARGE WATER PUMP AT START UP.
TO AVOID SERIOUS DAMAGE TO WATERBLASTING
HYDRAULIC COMPONENTS WHEN OPERATING IN FREEZING
TEMPERATURES OR TEMPERATURES BELOW 60 DEGREES
FAHRENHEIT (16
0
CELSIUS), IT IS NECESSARY TO OPERATE
THE HYDRAULIC SYSTEM AND OTHER WATERBLASTING
COMPONENTS INCLUDING THE BLOWER AND HIGH
PRESSURE PUMP, WITH THE ENGINE AT IDLE, UNTIL
THE HYDRAULIC FLUID REACHES A TEMPERATURE OF
60 DEGREES FAHRENHEIT (16
0
CELSIUS) OR ABOVE AS
INDICATED ON THE THERMOMETER IN THE RESERVOIR
SIGHT GAUGE.
Winterizing Option 2 - Circulating Anti-
freeze Through The System
This option is preferred for trucks operating daily
during freezing weather. GLYCOL based wind-
shield washer or RV water potable water system
antifreeze is circulated through the system to
protect components from freezing. This procedure
requires 15 to 20 US gallons (58 to 76 liters) of
antifreeze to properly winterize the waterblasting
system. Make sure you have enough antifreeze on
hand before starting the winterizing procedure.
NEVER USE ALCOHOL BASED ANTIFREEZE SOLUTIONS
TO WINTERIZE THE WATERBLASTING SYSTEM. USING
ALCOHOL BASED ANTIFREEZE SOLUTIONS TO WINTERIZE
THE HIGH PRESSURE WATER SYSTEM WILL DESTROY THE
SEALS AND O-RINGS.
Use the following procedure winterize the
waterblasting system with antifreeze:
1. Make sure the truck is parked on level ground
and 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. Close the tank drain valves and pour 15 to 20
US Gallons (58 to 76 liters) of glycol based
windshield washer or potable water system
antifreeze into the clean water storage tank.
4. Remove the spray bars. Drain the water, then
cap the inlet tting and store.
5. Reactivate the truck in Operate Mode and
turn the PTO switch ON. Do not activate the
40K clutch at anytime during winterizing
operations.
6. Engage the charge pump and allow it to run
until undiluted antifreeze ows from both thru-
shafts and the bilge pump. Then shutdown the
charge pump and the waterblasting system.
7. Test the antifreeze owing from the thru-shafts
to ensure it is of a high enough concentration
to protect the water system at the expected
temperatures.
8. Disconnect the bilge pump hose at the debris
tank tting.
9. Pour 2 gallons of anti-freeze into the high pres-
sure pump stung box sump so it will drain
to the bilge pump sump system.
10. Allow the bilge pump to run until anti-freeze
is visible at the bilge pump hose tting in the
debris tank. Then shutdown the pump and
reconnect the hose.
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