Hotsy 1700 Series, Руководство оператора

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11
Operations & Maintenance
General Washing Techniques
1. Hold spray nozzle a foot or so from the surface
being cleaned. Spray at an angle to get under the
material and lift it off.
2. When washing large objects, use detergent injector
to apply detergent. Start washing from the bottom
and work up. Allow the detergent to set a few
minutes. After washing, rinse from the top down.
3. Cleaning heavy dirt or material away with a hard
stream of clear water is recommended before
using a cleaning agent.
Maintenance
Pump Lubrication
The pump on your 1700 Series pressure washer is a
triplex ceramic plunger pump. As the plungers move
back, water flows through the inlet valve into the
manifold chamber. Then, when the plungers move
forward, the inlet valves close and the discharge valves
open to produce discharge pressure.
Use only SAE 10W-40 weight (non-foaming oil);
change oil after first 50 hours of use. Thereafter,
change oil every year or at 500 hour intervals. Oil level
should be checked through the use of the dipstick
found on top of the pump, or half way up on the oil
gauge window. Oil should be maintained at that level.
Unloader Valves
The unloader valve is connected directly to the
discharge port of the pump. Its purpose is to allow recir-
culation back into the pump inlet when the trigger on
the spray gun is closed.
Nozzles
Each machine is equipped with four spray nozzles
depending on the flow and pressure of that particular
model. Spray nozzles vary in bore size and angle of
spray. When ordering replacement nozzles, please
specify size and angle of nozzle. Nozzle size for each
machine is located on the serial plate.
Storage
CAUTION: Always store your pressure washer in a
location where the temperature will not fall below
32
° F (0 ° C). The pump in this machine is suscep-
tible to permanent damage if frozen.
FREEZE DAMAGE IS NOT COVERED
BY WARRANTY.
Winterizing Procedure
Use the following cold weather procedures whenever
the washer must be stored or operated outdoors under
freezing conditions.
During winter months, when the temperature drops
below 32°F, protecting your machine against freezing
is necessary. A blowout valve is available which can be
screwed on in place of the garden hose to blow water
out of the system. When compressed air is not avail-
able or impractical, siphon a small amount of antifreeze
into the machine and siphon a 50/50 mixture of anti-
freeze into the pump. Run the pump dry for a few sec-
onds and disconnect all hoses to allow water to drain.
Low Pressure Diagnosis
Refer to Troubleshooting Chart for low pressure. If, by
referring to the chart, the trouble is found to be either
the unloader or the pump, your next step is to
determine whether in fact the unloader or the pump is
the problem. This can be done by eliminating the
unloader from the system and attaching the 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.
CAUTION: When using this procedure to test
components, keep the spray gun open at all times.
Hotsy 1700 Operator’s Manual 8.914-380.0 - W