GROUND FORCE 717H01, Operation & Maintenance Manual, Page: 19 / 57

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Test all delivery functions according to these
instructions.
4. Reset the water level if equipped with analog
water level gauge (float switches are installed on
the tank). Press buttons 1, 3, 4 & 5 at the same
time to open the water level reset option.
5. Press the Reset Water Level button, then press
X to return to the main screen.
Once all operational tests are complete, the water
truck is ready to be placed in service.
3.13 TANK FILLING
Once all of the loose components have been re-
installed and the controls have been verified, the
water truck is ready to be filled in preparation for an
operational test. Refer to the Water Control System
section and check for proper operation of all water
delivery systems.
• Before filling the water tank, verify that all low point
drain valves are shut, and that all low point drain
plugs are re-installed.
• After the drains are verified sealed, fill the water
tank according to local procedures. Observe any
tank level indicator system that may be installed to
verify operation during water tank filling.
• Engage the hydraulic system and start the water
pump. Verify direction of rotation if not already
performed. Reverse operation of a centrifugal water
pump will result in poor water pump performance
and often lead to water pump damage.
• Cycle each spray head individually and adjust collar
for proper spray pattern.
• Engage the spray head timers and verify that the
timers are working correctly and respond to opera -
tor input.
• Open the water cannon isolation valve and verify
acceptable water cannon performance. It is nec-
essary to raise engine speed to achieve optimum
performance.
3.14 DIESEL-FIRED HEATING SYSTEM
If a heating system is installed, check its operation
as follows:
• Verify that the system surge tank level is a minimum of
halfway up the lower sight gauge. Fill this tank as neces -
sary with engine coolant.
• Refer to the manufacturer’s start-up instructions and
start the heater.
• Monitor the heater’s operation, and the level in the
surge tank. It may be necessary to re-prime the heater’s
recirculation pump as air bubbles work out of the
system.
• The heater is thermostatically controlled, and the burner
will cycle on and off automatically. The system should
be allowed to run until the burner cycles three or four
times with no drop in surge tank level or re-priming of
the recirculation pump.
• Even after this initial testing is complete, it is still pos -
sible for air pockets to be trapped in the system. These
trapped air pockets will work themselves out of the
system within the first few days of truck operations with
the heater’s recirculation pump running. During this
time frame, the level in the surge tank must be carefully
monitored to prevent allowing the pump to run dry and
cause damage to the pump.
NOTICE
For further information contact Ground Force Technical
support to request the manufacturer’s manual by writing
to service@gfworldwide.com .
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