Maintenance; Pump Motor; Heating Coil - Hotsy 981SS Operating Instructions And Parts Manual

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 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, which-
ever comes first.
Sight Glass
(on Rear of Pump)
Oil Fill
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 periodi-
cally.
• Flush the pressure washer system with antifreeze
if storing for an extended period of time; refer to Stor-
age for details.
16

MAINTENANCE

Dipstick
97-6574 • HOTSY 900-1400 GAS FIRED • REV. 10/05

Pump Motor

On a yearly basis, oil pump motor per instructions on mo-
tor nameplate.
NOTE: Some motors may be equipped with perma-
nently lubricated bearings and will not require addi-
tional lubrication.
Gas Burner
It is recommended that the gas burner be serviced yearly
or as needed. Contact your local service center.
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 set-
ting may cause personal injury and/or property dam-
age, and will void the manufacturer warranty.

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.