Maintenance; Relief Valve - Hotsy 555 HE Instrucciones De Operación Y Manual De Piezas

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 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 side of the pump, refer to Figure 7.
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.
Figure 7 - Pump Lubrication
Proper Pump Care
• DO NOT pump acids.
• DO NOT allow pump to run dry.
• Winterize if storing in freezing temperatures, refer
to Storage & Maintenance 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 periodi-
cally.
• Flush the pressure washer system with antifreeze
if storing for an extended period of time, refer to
Storage & Maintenance 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.
10
STORAGE & MAINTENANCE
Oil
Drain
Oil Fill/
Dipstick
HOTSY 555HE • 9.808-140.0 • Rev. 10/19
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 parts refer to Pump Assembly.
Burner Fuel Filter
Drain any water which has accumulated in fuel filter and
clean or replace element as needed. For replacement
parts, 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.

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.