and do not allow engine to run out of fuel. Refer to
engine manual for preventative maintenance schedules
and procedures.
Not covered by engine warranty: Damage caused by
contaminated oil, incorrect oil change
intervals/incorrect oil viscosity, bad fuel, use of any
starting agents, the use of greater than 50/50%
antifreeze/water or rust corrosion of the engine or fuel
system. Any normal replacement and/or service of
injectors, or injector tips, the checking and/or
replacement of parts that fail due to impurities in the
fuel, routine fuel system maintenance and fuel filters.
Damage caused by water entering the engine due to
any cause.
POWER TRANSMISSION:
WARNING: Shut off power supply before servicing.
BELT DRIVE: Check belt condition, alignment and
tension periodically. Replace belts when they show
signs of wear or cracking. Tighten belts by loosening
the mounting bolts on the pump and generator to permit
them to slide. Turn the horizontal rail adjusting bolts to
tighten belts until they deflect ¼" to ½” with finger
pressure.
DIRECT DRIVE: Pump is bolted directly to the
motor/engine. If pump needs to be removed, do not
force off by prying or damage may occur. When
reassembling, coat the entire motor shaft with heavy
grease or a generous amount of anti-seize. Use
“thread locker” or “lock tight” on mounting bolts and
tighten set screw on key shaft.
GENERATOR:
Some self-contained hot water units are
equipped with a 115v, generator to
power the diesel burner. Allow engine to
warm up and operate before engaging burner switch or
any device plugged into auxiliary outlet. Disengage
burner switch or shut off plugged in devices prior to
turning off engine. The generator output voltage must
be between 110 to 130 Volts, (or between 59 to 63 Hz.),
when the unit is under full load. If the generator voltage
falls out of this range, the RPM of the engine will need
to be adjusted to proper speed. If the engine cannot
maintain the proper RPM, do not use the burner or any
power from the generator until the engine is repaired.
An AUXILIARY OUTLET is available on some mobile
wash skids for running wastewater recovery systems,
lights, or other accessories off of the generator. A
maximum of 1500 watts of 115v power is available
when the burner is on or 2000 watts when it is off. A
switch/circuit breaker located on the control panel will
need to be reset if the circuit is overloaded. Auxiliary
outlet is GFCI protected. If tripped, check item plugged
in and reset.
To extend generator life, keep the generator head clean
and clear of water, dust, sand, dirt, and oil.
PUMPING SYSTEM:
PUMP: The pump is a positive
displacement, oil bath crankcase,
and triplex plunger type. It contains
3 plungers, which move forward and
backward in a cylinder to propel
water past 3 inlet valves and 3 discharge valves into a
high-pressure manifold. The crank case oil window
should be checked for oil level and clarity and the pump
for oil or water leaks before each use. The sight window
is located at the rear (opposite the head) of the pump
and should be filled to the red dot with specified pump
oil, available at your Hydro Tek dealer (refer to
maintenance schedule on back page). If the oil
becomes milky in color, moisture is entering the
crankcase. Change the oil and contact your authorized
Hydro Tek dealer if the problem persists.
Keeping filters clean and checking for air in pump feed
lines can prevent cavitation and increase pump life. Do
not run pump in the bypass mode (pump running with
the trigger gun off), for a period of more than 5 minutes
or the pump will begin to overheat (maximum water
temperature is 145°F). Do not run pump dry. Protect
from freezing. Do not run a frozen pump until it is
completely thawed.
UNLOADER AND PRESSURE RELIEF
VALVE: The unloader valve is preset by
manufacturer to govern the proper output
pressure of your machine. It will release the
pressure of the pump back into the inlet if the
trigger on the spray gun is released. NEVER
increase the set pressure on the unloader to exceed the
specifications for your machine.
All hot water machines are equipped with a SAFETY
PRESSURE RELIEF VALVE. In the unlikely event that
your unloader fails, or if the burner overheats and builds
excessive pressure, the pressure relief valve will vent
the pressure into the atmosphere. If this occurs, turn
off the machine and have it checked by an authorized
dealer. The pressure relief valve will automatically
reset itself.
Warning: Make sure the burner and all auxiliary power
is off when the engine is started or stopped.
Keep generator dry at all times.
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