21
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.
IMPORTANT: Machine must be stored indoors.
Pump
Use Hotsy Pump Oil (8.923-422.0) or equivalent 10W-
40
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 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
manufacturer’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 anti-
freeze if storing for an extended period of time,
refer to
Storage
for details.
Pump Motor
On a yearly basis, oil pump motor per instructions on
motor nameplate.
NOTE: Some motors may be equipped with
permanently lubricated bearings and will not require
additional lubrication.
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.
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 setting may cause personal injury and/or
property damage, and will void the manufacturer
warranty. For replacement refer to Pump Assembly
page.
Burner Fuel Filter
Drain any water which has accumulated in fuel filter
and clean or replace filter element as needed.
Heating Coil
Coil De-scaling:
In hard water areas, scale buildup
within the heating coil will occur. Scale deposits will
decrease the water temperature rise and may eventu-
ally clog the heating coil. Contact your local service
center when de-scaling is needed.
Coil De-sooting:
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 de-sooting is needed.
Brake
Every 50 hours inspect brake components for proper
operation. Repair or replace if needed.
Hotsy 800 OIL FIRED OPERATOR’S 8.921-206.0 - B
Dip
s
tick
Sight Gla
ss
(on Rear of Pump)
Oil Fill
