Hotsy 781SS Service manual

OPERATING INSTRUCTIONS
AND PARTS MANUAL
Thank you for purchasing a Hotsy PressureWasher.This manual covers the operation and mainte-
nance of your pressure washer. All information in this manual is based on the latest product informa-
tion available at the time of printing. Hotsy, Inc. reserves the right to make changes at any time without
incurring any obligation.
Read instructions carefully before attempting to assemble, install, operate or service this pressure
washer. Failure to comply with instructions could result in personal injury and/or property damage!
MODELS 781SS,
871SS, 921SS
SERIAL NUMBER:
DATE PURCHASED:
FOR SALES AND SERVICE, PLEASE CONTACT:
L
I
S
T
E
D
®

871SS SPECIFICATIONS
●Pump Volume At Pump Head: 2.71 GPM/162.6 GPH
●Pump Pressure At Pump Head: 2400 PSI
●Burner Type: Fuel Oil Fired, 248,500 BTU/Hr.
●Burner Fuel Pressure: 140 PSI
●Machine Voltage: 7 HP Robin Subaru, Manual Start
●Machine Weight: 291 Lbs.
●Shipping Weight: 330 Lbs.
●Exhaust Stack Size: 8"
●MachineDimensions:Length=48",Width=27",Height=42.5"
781SS SPECIFICATIONS
●Pump Volume At Pump Head: 2.5 GPM/150 GPH
●Pump Pressure At Pump Head: 2000 PSI
●Burner Type: Fuel Oil Fired, 248,500 BTU/Hr.
●Burner Fuel Pressure: 140 PSI
●Machine Voltage: 6 HP Robin Subaru, Manual Start
●Machine Weight: 287 Lbs.
●Shipping Weight: 326 Lbs.
●Exhaust Stack Size: 8"
●MachineDimensions:Length=48",Width=27", Height=42.5"
921SS SPECIFICATIONS
●Pump Volume At Pump Head: 3.0 GPM/180 GPH
●Pump Pressure At Pump Head: 3000 PSI
●Burner Type: Fuel Oil Fired, 248,500 BTU/Hr.
●Burner Fuel Pressure: 140 PSI
●Machine Voltage: 9 HP Robin Subaru, Manual Start
●Machine Weight: 385 Lbs.
●Shipping Weight: 415 Lbs.
●Exhaust Stack Size: 8"
●Machine Dimensions: Length=47", Width=31", Height=49"

Page4 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev.9/04
Figure 1 - Machine Component Layout (871SS Shown)
TRIGGER
GUN
CONTROL
BOX
HIGHPRESSURE
HOSE
WAND
BURNEREXHAUST
VENT
COILDRAIN
PLUG
HOUR
METER
ENGINEFUEL
TANK
BURNER
PUMP
DETERGENT
INJECTOR
ANTI-SIPHON
VALVE
DETERGENT
INLETLINE
BURNERFUEL
TANK
HIGHPRESSURE
NOZZLES
THERMOSTAT
BURNERSWITCH
ENGINE

Page5Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev.9/04
INTRODUCTION
Thank you for purchasing a Hotsy Pressure Washer.
This manual covers the operation and maintenance of
the 781SS, 871SS and 921SS washers. All informa-
tion in this manual is based on the latest product infor-
mation available at the time of printing.
Hotsy, Inc.reserves the right to make changes at any
time without incurring any obligation.
Owner/User Responsibility:
Theowner and/orusermust have anunderstandingof
themanufacturer’soperatinginstructions andwarnings
before using this Hotsy pressure washer.Warning in-
formationshouldbeemphasizedandunderstood.Ifthe
operator is not fluent in English, the manufacturer’s in-
structionsand warnings shall be readtoand discussed
with the operator in the operator’s native language by
the purchaser/owner, making sure that the operator
comprehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’instructions.
This manual should be considered a permanent
part of the machine and should remain with it if
machine is resold.
When ordering parts,please specify model and
serial number.
ASSEMBLY
Unpacking
Unpack carefully. Wear safety glasses or goggles while
unpacking, assembling, or operating pressure washer. If
there are missing components or hidden damage,
immediately contact carrier concerning discrepancies.
1. Cut strapping band from pressure washer and pallet.
2. Remove pressure washer from pallet.
Parts Included
•Pressure Washer
•Pressure Hose
•Wand
•Operating Instructions and Parts Manual
•Gasoline Engine Manual
•Parts Bag Containing:
■Pressure Nozzles (3 Ea.)
■Quick Disconnects (2 Ea.)
■Quick Disconnect Plug
■Trigger Gun
Tools Required
•8" Adjustable Wrench
•Teflon Tape
•Flat Blade Screwdriver
Pressure Hose,Trigger Gun andWand
1. When assembling, use teflon tape on all threaded
plumbing connections to prevent leakage.
2. Install the pressure hose on the pressure washer as
shown in Figure 2.
3. Assemble wand components as shown in Figure 3.
NOTE: The pressure nozzle is not to be installed at
this time.
4. Make sure all plumbing connections are tight.
Figure 2 - Pressure Hose Installation to Coil
PRESSUREHOSE
RELIEFVALVE
Figure 3 - Pressure Hose Installation toTrigger Gun
TRIGGERGUN
QUICKDISCONNECT
QUICK
DISCONNECT
WAND
QUICKDISCONNECTPLUG
PRESSUREHOSE