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Hotsy 5645 • 97-6580 • Rev. 8/03
2. Wash from the bottom to the top, using side-to-side
motions. This washes away heavy dirt and allows the
detergent to soak as you work toward the top.
3. Do not wash at a 90° angle to the work (straight at it).
This will allow water to splash back at you and
reduces your cleaning power. Wash at a 30° to 60°
angle to the work. This will allow the water to splash
away from you and the water will wash the dirt away
faster and easier.
4. Use the full width of the spray pattern to wash in a
wide path. Overlap spray paths for complete cover-
age. Wash from side to side, using slow, steady
motions.
5. The nozzle should be 12" to 24" from work, closer for
tough areas. Be careful on painted or delicate sur-
faces, the pressure may damage surface if the nozzle
is to close.
6. Small parts should be washed in a basket so the pres-
sure does not push them away. Larger, lightweight
parts should be clamped down so the pressure does
not push them away.
7. To rinse, turn the detergent metering valve clockwise
to stop the detergent flow through the valve. Always
rinse with cold water after using detergent. Rinse from
the top to the bottom to prevent the detergent from
dripping onto a rinsed area. For the best results, con-
tact your Hotsy dealer to help you select the best
detergent for your application.
To Stop
1. If detergents were used, draw clear water through the
system to purge detergent.
2. If burner was used, turn OFF burner switch, and
allow pump to run cold water through coil.
3. Move throttle control to idle position.
4. Turn key on engine counterclockwise (CCW) to OFF
position.
5. Turn OFF fuel shut-off valve.
6. Turn OFF water supply.
7. Squeeze trigger gun open to relieve system pressure.
STORAGE
DANGER: Do not store flammable liquids (gasoline,
solvents, etc.) near pressure washer, or in non-venti-
lated areas.
Protect from freezing by storing in a heated area, or by
flushing the system with antifreeze. To flush the system,
fill the float tank with antifreeze and remove spray nozzle
from wand. Start the machine and allow it to run until
antifreeze flows from the end of the wand. Place end of
wand into float tank and circulate the antifreeze through
system for several minutes. Open and close the trigger
gun several times to circulate antifreeze through the
unloader valve. Place detergent line into the float tank.
Open the detergent metering valve to draw antifreeze into
the detergent system.
If the pressure washer is not to be used for a considerable
length of time, it is recommended to flush the system
with antifreeze for rust protection.
MAINTENANCE
WARNING: Unauthorized machine modification or use
of non-approved replacement parts may cause per-
sonal injury and/or property damage and will void the
manufacturer warranty.
Pump
Use HOTSY Pump Oil (P/N 315068) or equivalent 30W
non-detergent oil for pump crankcase. Crankcase must
be filled to the full mark on the dipstick or to center of
sight glass window found on the rear of the pump. During
the break-in period, make sure the oil is changed after
the first 25 hours of operation. After that, replace oil every
3 months or 300 hours, whichever comes first.
DO NOT:
1. Pump acids.
2. Fail to winterize in freezing temperatures.
3. Allow pump to run dry.
4. Allow machine to run with trigger gun closed for more
than 3 minutes at any one time or damage to pump
may occur.
DO:
1. Use a water softener on the water system if known to
be high in mineral content.
2. Use only high quality detergents and follow manu-
facturer’s mix recommendations.
3. Immediately after using detergent solutions the sys-
tem should be flushed thoroughly with clear water.
4. Clean strainer screen on detergent line periodically.
Hour Meter
An optional hour meter (P/N 783865) is available for use
on the Model 5645. The hour meter will monitor the total
hours of operation of the pressure washer to signal when
routine maintenance is required.
Unloader Valve
WARNING: The unloader valve on this pressure
washer has been factory set and sealed and is a field
nonadjustable part. Tampering with the factory set-
ting may cause personal injury and/or property dam-
age, and will void the manufacturer warranty.
Relief Valve
WARNING: The relief valve on this pressure washer
has been factory set and sealed and is a field nonad-
justable part. Tampering with the factory setting may
cause personal injury and/or property damage, and
will void the manufacturer warranty.
Burner Fuel Filter
Drain water that has accumulated in fuel filter and clean
filter element as needed.
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