Shark HNG-3010, Operator'S Manual

HNG SERIES PRESSURE WASHER  

OPERATOR’S MANUAL

13

If the machine is equipped with a shut-off spray gun and
various nozzle patterns, use the wide patterns for easy
soil removal jobs and the narrow patterns on the more
difficult jobs or for tight areas such as cracks and holes.

In most cases, faster results and better detergent
economy is obtained by applying the detergent and let-
ting it “set” for a few minutes, prior to rinsing. This en-
ables the detergent to do its soil penetrating and loosen-
ing work.

Most cleaning work terminates with a high pressure rinse
as part of the normal cleaning procedure. In some cases,
however, the last operation may be application of a de-
tergent (sanitizing, for example). After such work, run
the machine for 20-30 seconds to clear pump and lines.

MAINTENANCE AND SERVICE

Spray Nozzles:

Each machine is equipped with one or more spray
nozzles, depending on the model. Different spray nozzles
are calibrated for each machine, depending on the flow
and pressure of that particular model. Spray nozzles vary
in bore size and angle of spray. Popular spray angles are
0°, 15°, 25°, 40°. When ordering, please specify size and
angle of nozzle. Nozzle size for each machine is located
on the serial plate.

Unloader Valves:

Unloader valves relieve pressure in the line when a spray
gun is closed. Unloader valves are preset and tested at
the factory before shipping. Occasional adjustment of
the unloader may be necessary to maintain correct pres-
sure. For valve adjustment contact your nearest Shark
dealer or call Shark technical support.

Winterizing Procedure:

Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever the washer must be stored or operated outdoors
under freezing conditions.

It is necessary to protect your machine against freezing
when temperatures drop below 32° F. Siphoning a small
amount of antifreeze into the system is recommended.
This is done by pouring a 50-50 mix of antifreeze and
water into the float tank and then siphoning 100% anti-
freeze through the detergent line with the pump on. If
compressed air is available, an air fitting can be screwed
into the float tank strainer fitting, and by injecting com-
pressed air, all water will be blown out of the system.
The use of a draft diverter will prevent the wind chill fac-
tor from freezing the coil.

Low Pressure Diagnosis:

(Machines with spray gun)

Refer to Troubleshooting Chart for low pressure. If the
trouble is found to be either the unloader or the pump,
your next step is to determine which  is the problem. This
can be done by eliminating the unloader from the sys-
tem and attaching the 50' discharge hose directly to the
pump. If high pressure is developed in this manner, the
pump is good and the unloader needs to be repaired or
replaced. If low pressure is still present, then the pump
needs repairing.

CAUTION: When using this procedure to test com-
ponents keep the spray gun open at all times.

High Limit Hot Water Thermostat:

For safety, each machine is equipped with an adjustable
thermostat. In the event the temperature of the water
should exceed its operating temperature, the thermo-
stat will turn the burner off until the water cools.

Pumps:

Use only SAE30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should be
checked through use of the dipstick found on the top of
the pump or by the red dot visible through the oil gauge
window. Oil should be maintained at that level.

HEATING COILS

To Check Water Heater Coil for Leaks:

With the main burners "OFF" start the pumping unit and
allow it to run for a few minutes. With a drop light or flash-
light check the burner compartment. If no leaks are vis-
ible, and water is dripping from the coils then it is con-
densation from the flue gases when the burners are on.

Condensation from Heating Coil:

When cold water is being pumped into the water heater
coils, and the burners are on, condensation will form on
the coils and drip down into the burner compartment,
giving the appearance of a leaking coil, particularly on
cold humid days.

Deliming Coils:

In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best prevention
for liming conditions is to use high quality cleaning de-
tergents. In areas where alkaline water is an extreme
problem, periodic use of Shark Deliming Powder (part
#9-028008) will remove lime and other deposits before
coil becomes plugged. (See Instructions below for use
of Shark Deliming Powder.)