HOTSY 680SS • 8.914-368.0 • Rev. 02/15
OPERATOR’S MANUAL
PRESSURE WASHER
12
MAINTENANCE
WARNING: Unauthorized machine modi
fi
cation or
use of non-approved replacement parts may cause
personal injury and/or property damage and will void
the manufacturer warranty.
Pump
Lubrication:
To lubricate pump, use 30W non-detergent
oil for pump crankcase. Crankcase must be fi lled to center
of sight glass window found on the rear of the pump, refer
to
Figure 5.
During the break-in-period, make sure the
oil is changed after the fi rst 25 hours of operation. After
that, replace oil every 3 months or 300 hours of operation,
whichever comes fi rst.
Proper Pump Care:
•
Do not pump acids.
•
Do not allow pump to run dry.
•
Winterize if storing in freezing temperatures, refer
to
Storage
for details.
•
Use a water softener on the water system if known
to be high in mineral content.
•
Use only high quality detergents and follow mix
recommendations.
•
Flush the system with clear water immediately
after using detergent solutions.
•
Clean fi lter screen on detergent inlet line periodi-
cally.
•
Flush the pressure washer system with antifreeze
if storing for an extended period of time, refer to
Storage
to details.
Pump Motor
On a yearly basis, oil pump motor per instructions on
motor nameplate.
NOTE: Some motors may be equipped with perma-
nently lubricated bearings and will not require ad-
ditional lubrication.
Relief Valve
WARNING: The relief valve on this pressure washer
has been factory set and sealed and is a
fi
eld non-
adjustable part. Tampering with the factory setting
may cause personal injury and/or property damage,
and will void the manufacturer warranty. For replace-
ment parts refer to Coil Outlet Assembly.
If pressure from pump or thermal expansion should
exceed safe limits, the relief valve will open, allowing
high pressure to be discharged through hose to ground.
Caution: Inspect relief valve annually for any
obstruction.
Unloader Valve
WARNING: The unloader valve on this pressure
washer has been factory set and sealed and is a
fi
eld nonadjustable part. Tampering with the factory
setting may cause personal injury and/or property
damage, and will void the manufacturer warranty. For
replacement refer to Pump Assembly, Item 4.
Burner Fuel Filter
Drain any water which has accumulated in fuel fi lter
and clean or replace fi lter element as needed. Refer to
Burner Assembly.
Heating Coil
Coil Descaling:
In hard water areas, scale buildup within
the heating coil will occur. Scale deposits will decrease
the water temperature rise and may eventually clog the
heating coil. Contact your local service center when
descaling is needed.
Coil Desooting:
Poor grades of fuel oil or inadequate
combustion air will cause heavy soot buildup on the
outside surface of the heating coil. These deposits will
insulate the coil. This will restrict the air fl ow through the
coil, further aggravating the soot buildup. Contact your
local service center when desooting is needed.
Figure 5 - Pump Lubrication
Oil Sight
Glass
Oil Fill/
Dipstick
Oil Drain Plug
