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Thank you for purchasing a Hotsy Pressure Washer. 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!
®
SERIAL NUMBER:
DATE PURCHASED:
FOR SALES AND SERVICE, PLEASE CONTACT:
MODELS 781SS,
871SS, 921SS
OPERATING INSTRUCTIONS
AND PARTS MANUAL
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Table of Contents
Related Manuals for Hotsy 781SS
Summary of Contents for Hotsy 781SS
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Page 1: Operating Instructions
Thank you for purchasing a Hotsy Pressure Washer. 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. - Page 3 781SS SPECIFICATIONS 871SS SPECIFICATIONS Pump Volume At Pump Head: 2.5 GPM/150 GPH Pump Volume At Pump Head: 2.71 GPM/162.6 GPH Pump Pressure At Pump Head: 2000 PSI Pump Pressure At Pump Head: 2400 PSI Burner Type: Fuel Oil Fired, 248,500 BTU/Hr.
- Page 4 HOUR METER DETERGENT INJECTOR PUMP DETERGENT INLET LINE HIGH PRESSURE HOSE HIGH PRESSURE BURNER BURNER FUEL NOZZLES TANK COIL DRAIN PLUG Figure 1 - Machine Component Layout (871SS Shown) Page 4 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 5 Figure 2. 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: The owner and/or user must have an understanding of the manufacturer’s operating instructions and warnings...
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Page 6: Important Safety Instructions
13. The best insurance against an accident is precau- USE CAUTION WHEN plug or starting the engine. tion and knowledge of the machine. REFUELING. (Fire and/or explosion may occur if this is not done.) Page 6 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04... -
Page 7: Installation
IMPORTANT: The use of a backflow preventer on 14. Hotsy will not be liable for any changes made to the water supply hose is recommended and may be our standard machines, or any components not pur- required by local code. -
Page 8: Oil Burner
NOTE: If a flue is installed, have a professional ser- viceman adjust your burner for a #1 or #2 smoke MANUAL TRIGGER LOCK spot on the Bacharach scale. Figure 5 - Nozzle Installation/Manual Trigger Lock Page 8 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04... - Page 9 DANGER: DO NOT place hands or fingers in front of is too close. high pressure spray. Bodily injury may result. 9. Small parts should be washed in a basket so the Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 9...
- Page 10 Always rinse with cold water after using detergent. Rinse from the top to the bottom to prevent detergent from dripping onto a rinsed area. For the best results, contact your Hotsy dealer to help you select the best detergent for your application. To Stop 1.
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Page 11: Maintenance
• 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. Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 11... -
Page 12: Troubleshooting Guide
Use 5/8 inch minimum hose. Check for debris clogging inlet screen. Trigger of trigger gun released. Squeeze trigger. Water must be spray- ing for burner to light. Page 12 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04... - Page 13 IMPORTANT If the pressure washer demonstrates other symptoms or the corrective actions listed do not correct the problem, contact the local authorized Hotsy Service Center. The Hotsy Service Center can be identified by visiting www.hotsy.com or by calling 1-800-525-1976.
- Page 14 DETAIL SEE COIL OUTLET ILLUS. RECTIFIER (REVERSED DETAIL SEE VIEW) CONTROL 14, 55 ILLUS. 5 10 DETAIL SEE BURNER ILLUS. Figure 9 - Exploded View Left Side Page 14 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 15 DETAIL SEE PUMP ASSY ILLUS. 36,37 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 15...
- Page 16 Clamp, Hose, UNI .46-.54 ST Order Amount Needed In Feet 867368 Hose, 1/4", Push-On, Fuel Line 780456 Washer, 5/8", Flat, SAE 983013 Wheel & Tire, 6.5" Steel Rim, 12.5" Tire Page 16 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 17 661257 Street Elbow 1/4" 783813 Motor 698019 Nipple 1/8" x 1/4" Hose 630730 Coupling 676640 Blower Fan Standard hardware item available locally. Not Shown Replacement Parts 875490 Filter Element Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 17...
- Page 18 707147 Capacitor 829620 Plug 358026 Clamp 612945 Bolt, 1/4-20 x 1/2" 703106 Nut, 1/4" 2-011681 Cap, Capacitor, 1.37 x 1.50 x .060 BLK, W/o Hole 860140 Relay Not Shown Page 18 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 19 Plug, 3/8" Gas Tap 935159 Strainer, Chemical, 875651 Switch, Pressure, Black with 1/4" Brass Barb 823989 Clamp, Hose, UNI .40-.48 ST 921421 Pump Protector 921395 Valve, Anti-Siphon Not Shown Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 19...
- Page 20 Clamp, Hose, UNI .46 - .54 961534 Hose, 1/4" x 1/2" Braided 4 ft. 935159 Strainer 715736 Plug, 1/8 Sq. 600260 Adapter 3/8 NPT x 1/4 NPT 921395 Valve, Anti-Siphon Page 20 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 21 961534 Hose, 1/4" x 1/2" Braided 644802 Elbow, 3/8" Street 2-0031 Vinyl 4 ft. 875651 Switch, Pressure 6-02165 935159 Strainer, Chemical w/1/4" Brass Barb 823989 Clamp, Hose, UNI .40-.48ST Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 21...
- Page 22 89-0204004600 Adjustable Knob 89-0009022100 Ring 89-0009020700 Seat 89-0009022000 Ring Ø14 89-2409007700 Piston Rod 89-3200007100 Plug G3/8 89-1210040600 O-Ring 89-3002052200 Support 89-0009020600 Ring 89-0019003400 Sealing Ring 40 x 55 x 7 Page 22 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 23 89-1210004000 O-Ring 1.78 x 15.6 89-1802018000 Spring 89-3410030300 Injector Body Kit 3/8 NPT 89-3218029900 Pump Valve Chamber 89-1802019700 Spring 89-3200001700 Plug 1/8 x 8 89-2409008600 Check Valve 89-2800008100 Garden Hose Swivel Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 23...
- Page 24 Complete Seal Packing Kit (15mm) 630685 Crankshaft 753039 Complete Valve Assembly Kit 617639 Ball, Bearing 877655 Plunger Seal Kit 630684 Crankshaft Seal 753040 Ceramic Sleeve Kit (15mm) 600127 Mounting Range Page 24 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 25 * Part available in kit (See below) 20** 70-150318 Valve Seat 38 70-140051 Washer ** Part available in kit ONLY (See below) 21** 70-120200 Valve Plate 39 70-140103 Spring Washer Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 25...
- Page 26 Figure 18 - Pump, Exploded View Page 26 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 27 Screw 4mm x 6 mm 799501 Elbow 1/4" x 3/8" Hose 644802 Street Elbow 3/8" 780565 Copper Washer 640100 Relief Valve Cartridge 915630 Plug 3/8" Standard hardware item available locally. Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 27...
- Page 28 Nipple, 1/4" x 1/4" NPT ST Male 826169 Coupler, 1/4" Female, Brass 936647 Wand, SGL STR, Insulated, 48" 799091 Nozzle, SACQMEG, 0003.5, 799092 Nozzle, SACQMEG, 1503.5, Yellow 799093 Nozzle, SACQMEG, 4003.5, White Page 28 Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04...
- Page 29 Figure 21 - Wiring Diagram (871SS Shown) Hotsy 781SS, 871SS, 921SS • 97-6642 • Rev. 9/04 Page 29...
- Page 30 Hotsy will at its option repair or replace any part covered by this warranty which is defective under normal use for one year at no charge for parts or labor. All defects must be verified by an authorized Hotsy service location.