HOTSY 965SS-1075SS • 9.807-621.0 • Rev. 09/18
OPERATOR’S MANUAL
PRESSURE
WASHER
14
MAINTENANCE
WARNING: Unauthorized machine modification 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 filled to center
of red dot on oil gauge found on the side of the pump, refer
to
Figure 9
. During the break-in-period, make sure the
oil is changed after the first 40 hours of operation. After
that, replace oil every 3 months or 500 hours of operation,
whichever comes first.
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 manu
-
facturer's mix recommendations.
•
Flush the system with clear water immediately
after using detergent solutions.
•
Clean filter screen on detergent inlet line
periodically.
•
Flush the pressure washer system with antifreeze
if storing for an extended period of time, refer to
Storage
for details.
Gasoline Engine
Refer to the provided
Gasoline Engine Manual
for
recommended maintenance.
Oil Burner
Blower Motor:
Inspect the motor brushes for wear every
250 hours of operation and replace when 1/8" to 1/4"
brush material remains.
DO NOT
allow the brushes to
wear out completely or motor damage will occur. Refer to
Burner Assembly
. The motor bearings are permanently
lubricated and will not require any additional lubrication.
Unloader Valve/ Relief valve
WARNING: The unloader valve and relief valve on this
pressure washer has been factory set and sealed and
is a field nonadjustable part. Tampering with the facto
-
ry setting may cause personal injury and/or property
damage, and will void the manufacturer warranty. For
replacement refer to Pump Assembly.
Burner Fuel Filter
Drain any water which has accumulated in fuel filter
and clean or replace filter 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 flow through the
coil, further aggravating the soot buildup. Contact your
local service center when desooting is needed.
Hour Meter
This hour meter will monitor the total hours of operation of
the pressure washer to signal when routine maintenance
is required.
Battery
Refer to
battery manufacturer’s literature
for
recommended maintenance.
Relief Valve
WARNING: The relief valve on this pressure washer
has been factory set and sealed and is a field 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.
Oil Fill/Dipstick
Oil Drain
Plug
Oil Sight
Glass
Figure 9 - Pump Lubrication
