U.S. Products KING COBRA 300 Operating instructions

KING COBRA®300
120V
INFORMATION
&
OPERATING
INSTRUCTIONS
DO NOT OPERATE MACHINE UNTIL YOU HAVE READ
ALL SECTIONS OF THE INSTRUCTIONS
IMPROPER USE OF THE MACHINE WILL VOID THE WARRANTY
1. Always use a defoamer when foaming occurs to prevent vacuum motor damage.
2. Keep machine from rain and snow, extremes in temperatures, and store in a
heated location. Use the machine indoors. Do not use outdoors.
3. Do not let the pump run dry.
4. Use approved chemicals only. NO SOLVENTS.
5. Wear gloves or use rags when removing quick disconnects to prevent burns.
6. Keep machine from rain and snow, from extremes in temperatures, and store it in a
heated location. Use the machine indoors. Do not use outdoors.
6.5.2007

IMPORTANT SAFETY INSTRUCTIONS
This machine is only suitable for commercial use, for example in hotels, schools,
hospitals, factories, shops and offices other than normal residential housekeeping
purposes.
When using any electrical appliance, basic precautions should always be followed,
including the following:
NOTE: Read all instructions before using this machine.
WARNING!
To reduce the risk of fire, electric shock, or injury:
•Do not leave the machine unattended when it is plugged in. Unplug the unit from
the outlet when not in use and before servicing.
•To avoid electric shock, do not expose to rain or snow. Store, and use, indoors.
•Do not allow to be used as a toy. Close attention is necessary when used near
children.
•Use only as described in this manual. Use only the manufacturer’s recommended
attachments.
•Never add water over 130º F/54º C to the solution tank.
•Do not use with damaged cord or plug. If the machine is not working as it
should, has been dropped, damaged, left outdoors or dropped into water, return it
to a service center.
•Do not pull by the cord, use the cord as a handle, close a door on the cord, or pull
the cord around sharp edges or corners. Do not run the machine over the cord.
Keep the cord away from heated surfaces. To unplug, grasp the plug, not the cord.
•Do not handle the plug, the cord or the machine with wet hands.
•Extension cords must be 12/3 and no longer than 50 feet. Replace the cord or
unplug immediately if the ground prong becomes damaged.
•Do not put any object into openings. Do not use with any opening blocked; keep
free of dust, lint, hair, and anything that may reduce air flow.
•Keep loose clothing, hair, fingers, and all parts of body away from openings and
moving parts.
•Do not pick up anything that is burning or smoking, such as cigarettes, matches,
or hot ashes, or any health endangering dusts. Do not use to pick up flammable
or combustible liquids such as gasoline or use in areas where they may be
present.
•Turn off all controls before unplugging.
•Use extra care when cleaning on stairs.
•Connect to a properly grounded outlet only.
•Liquid ejected at the spray nozzle could be dangerous as a result of its
temperature, pressure, or chemical content.

INSPECTION:
Carefully unpack and inspect your KING COBRA-300 for shipping damage. Each machine is tested and
inspected before shipping. Any shipping damage incurred is the responsibility of the carrier. You should notify
the carrier immediately if you notice damage to the box or to the machine or parts.
CLEANING SOLUTIONS:
We recommend liquid cleaning chemicals, such as our Magic Fabric Cleaner. Powder chemicals may be used,
but unless mixed very thoroughly they could cause a build-up in the pump, lines, heat exchanger and/or
quick disconnects. Any problem caused by a chemical build-up is not covered by warranty. Use a neutral
cleaner with a pH between 6 and 9 to avoid premature wear of the pump, seals, and/or other components.
Damage caused by the use of strong chemicals is not covered by the warranty.
MAINTENANCE:
For optimum performance flush the machine with clear water at the end of each working day. Once a
month, minimum, run a flushing compound through the machine to break up any mineral or chemical build-
up that may have formed. U.S. Products “X-1500” is recommended. The vacuum motor, pump motor, and
the pump do not require any scheduled maintenance; however, the motors may require replacement brushes
after 1000 - 1500 hours, and the pump and bypass valve may require rebuild kits after 1000 - 1500 hours,
typically (refer to machine part list for numbers). Clean the body with an all purpose detergent, and protect it
with an automobile interior polish. Lubricate the wheels, castors, and quick disconnects with an all purpose
silicone spray.
Recovery
Tank Lid Switch
Plate
Vacuum Hose
Connection
Solution Hose
Connection
Vacuum
Hose and
Solution
Hose on
Reel
Latch
10 Inch
Wheel
Pressure
Gauge
4 inch
Castor
Solution Tank
Lid
Dump Hose
(on rear of
machine)

NOTE: This machine is only suitable for commercial use, for example in hotels, schools, hospitals,
factories, shops and offices other than normal residential housekeeping purposes.
SWITCH PLATE
PUMP
PRESSURE
ADJUST
TEMPERATURE
ADJUST
CIRCUIT LOCATOR
LIGHT INDICATES
TWO CIRCUITS.
HEATER WILL
AUTOMATICALLY
TURN ON
RED LIGHT INDICATES
HEATER IS HEATING
BYPASS SWICH.
TURNS THE HEATER ON
WHEN GREEN LIGHT IS
NOT ON
1
2
3
VACUUM
ON/OFF
SWITCH
4
5
6
INDICATES
SPRAYING
PRESSURE
PRESSURE
GAUGE
Record the serial number and model of your new extractor here: (and be sure to mail your warranty
card)
Serial Number: __________________ Model: KING COBRA-300 Purchase Date:_____________
Write the name and phone number of your distributor:
_____________________________________
7
1 Inspect the machine, hoses, and cleaning tools for cleanliness and completeness.
2Fill the solution tank with water. Using warm water may be a benefit in cleaning effectiveness, but
do not use hot water (above 130
°
F / 54
°
C) in the tank.
3 Screw the lid on the recovery tank. Close the dump hose.
4 Plug in the power cords. Do not connect both cords to the same outlet; the green, circuit locator light (1)
on the switch plate should light up. If the locator light does not come on, try different outlets until it
does. If you are certain the cords are on separate circuits, turn the Bypass switch (2) on.
CAUTION: using the Bypass switch (2) when the cords are on the same circuit may cause the breaker
in the wall to trip. NOTE: the receptacle on the left (viewed from behind the machine) powers theheater.
The red light (6) will turn on only when the heat exchanger is actively heating.
OPERATION

6 Connect the priming hose to the machine, turn the pump ON by turning the pump pressure knob (4)
up to increase pump speed, and prime the air out of the pump. When the water is clear (no air in it)
turn the pump off, and remove the priming hose. NOTE: if priming is difficult, place the open end of
the priming hose into the Vacuum inlet hose barb, and turn the vacuum on. Use your hand to block the
open area in the hose barb. This will allow the pump and the vacuum to work together to get the water
moving. Priming may take 20 - 60 seconds, and the solution tank should be full. Turn motors off.
Remove priming hose.
7 Add liquid cleaning chemical, with a pH between 6 and 9, to the solution tank.
8 Attach the spray hose to the solution quick disconnect and the vacuum hose to the hose barb on the
recovery tank. Pull the hoses out from the reel. Attach the other ends of the hoses to the cleaning tool.
9 Set the temperature knob (5) to the desired heat setting. Allow the heat exchanger two minutes to reach
operating temperature. The red light (6) will go out when the heater has reached operating temperature.
NOTE: the red light will be on nearly all the time as you clean.
10 Turn the pump on by setting the pressure adjust knob to the desired spraying pressure (0 - 300 PSI).
Read the spraying pressure at the pressure gauge (7) while spraying. Turn the vacuum on (3).
NOTE: the vacuum motor will start up slowly to prevent a large current surge.
11 Begin cleaning.
12 Use defoamer in the recovery tank any time foaming occurs.
13 Monitor the water level in the solution tank. Do not let the pump run dry.
14 When the solution tank gets low, turn off the pump and the vacuum, fill the solution tank, empty
and clean the recovery tank.
15 When finished with the job, remove any unused solution from the solution tank, and run a few gallons of
clean water through the system. Drain the recovery tank by placing the dump hose over a drain, or a
bucket, and removing the cap. Disconnect the hoses from the cleaning tool, and reel them up onto the
hose spool.
NOTE: To remove the reel, with hoses, from the machine, pull the vacuum hose loose from the hose barb
on the front of the tank. Disconnect the solution hose quick coupling. Push Vacuum hose into the center of
the hose spool. Grasp the spool from either side, and lift it off the machine. NOTE: before servicing any
component in the base cabinet, the hoses and spool must be removed from the machine before the tanks
can be lifted open.
This unique, patented system is operated by a solid state circuit. It will inform the operator when the two
cords are plugged into separate circuits by turning on the green, circuit locator light. This helps to prevent
tripping circuit breakers.
NOTE: if the green, circuit locator light does not illuminate when the cords are plugged in, then both cords
are on the same circuit. Try other outlets with one of the cords until you get the locator light to come on.
NOTE: if the bypass switch is turned on when both cords are on the same circuit, the breaker in the wall
may trip.
ELECTRIC CIRCUIT LOCATOR
REFER TO THE DIAGRAMS ON THE PREVIOUS PAGE
ELECTRONIC FLOAT SHUT-OFF
When the recovery tank is full, the electronic float switch will turn the vacuum motor off. This will
prevent water from entering the vacuum motor. The float may not work properly if the float filter rod
is dirty or if there is heavy foam in the tank
. To reset, turn the Vacuum switch off, and empty the
tank.
CAUTION: to avoid vacuum motor damage, always make sure the float filter is clean and that it
can travel freely before you operate the machine. Always use a defoamer any time foam is present.

8/30/2005
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U.S. PRODUCTS
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KC-300
120V/240V
81

ITEM PARTNo. DESCRIPTION ITEM PARTNo. DESCRIPTION
KING COBRA-300 EXTRACTOR
PART LIST
1 805 Chain, lid, 8”
2 901B Lid, solution tank
3 HKCR1 Holding tank
4 1088 Glide, teflon
5 178 Screw, 6-32 X 1/2”
6 925 Hose, 3/8” I.D. X 24”
7 164 Hose Barb, brass, 3/8” hose
8 91 Elbow, brass
9 945 Valve, bypass
10 92A Nipple, S/S
11 216 Elbow, brass
12 168 “T”, brass, 1/4 p.t.
14 211 Plug, brass, 1/4 p.t.
15 FP472 Pump complete, no motor
16 97 Reducer, brass
17 223 Quick Connect, male, 1/8 p.t.
18 165 Hose barb, brass, 1/2” hose
19 1147 Cap screw, pump to motor
20 950A Cam/bearing assembly
21 946 Hose, 1/2” I.D. X 22-1/2”
22 FP356A Hose, pump to heater
23 FP344 Hose assembly, pump to gauge
24 913 Vacuum motor, 3-stage, 120V
913A Vacuum motor, 3-stage,
240V
25 959 Gasket, vacuum motor
27 926 Manifold, vacuum motor mount
28 1136 Hose, vacuum inlet, 1-1/2” X 24”
29 907 Hose barb, for vacuum hose
31 1148 Screw, 8-32 X 1”
32 2086 Lid, vacuum, with ring
33 1074 Gasket, lid
34 1060C Plug cap, drain hose
35 1060B Hose, drain, 1-1/2” X 24”
FP398 Hose and cap, drain
36 156 Hose clamp
37 207A Filter, pump inlet
38 2026 Float switch
39 CWKC-BLK Cord wrap
41 1146 Pipe, 6.85”, S/S
42 45 Quick connect, male, 1/4 p.t.
43 1144 Rubber sleeve, 1/2” ID X 5”
44 1062 Receptacle, power cord
45 1057B Power cord, 25 ft, 3/12, yellow
46 VKCR1 Vacuum tank, white
47 948B Motor, pump, DC out, 120V
949B Motor, pump, DC out,
240V
48 FP314 PCB, pump motor speed, 120V
FP316 PCB, pump motor speed,
240V
49 FP225 PCB, vacuum control, 120V
FP225A PCB, vacuum control,
240V
50 2B1 Screw, 6-32 X 2-1/4”
51 2014 Fan, cooling, 120V
2018 Fan, cooling,
240V
51A 2015 Guard, fan
52 908A Latch, draw, rubber
53 928 Louver, 3”, includes 3 screws
54 BKCR-BLK Base, black
55 905 Castor, 4”
56 176 Hose clamp
58 FP348 Heat exchanger, 120V
FP349 Heat exchanger,
240V
59 455 Bracket, mounting, heater
60 ---- See miscellaneous parts and kits
61 918 Plate, heat sink
62 FP348A Hose, heater to outlet
63 FP336 Snap track, PCB mounting, 4”, 120V only
64 923B* PCB, circuit sensor, 120V only
65 910 Axle, 21”
66 2084 Wheel, 10”
67 27A Axle cap
68 943B Switch plate
69 951A Pressure gauge
70 28 Screw
71 FP399 Potentiometer, with cable, pump
71A 248 Knob, blue top, for pump speed
72 78B Light, red
73 FP345 Switch & actuator, vacuum
74 FP346 Switch & actuator, bypass
75A 248 Knob, red top, for heat adjustment
75 FP347 Potentiometer, with wires, heat
76 78 Light, green
77 FP351 Gasket, (#1043 X 84”)
78 942D Label, KC-300
80 FP350B Pressure line complete, 25’ with swivel
81 FP350A Vacuum hose complete, 25’ with swivel cuff
120V 240V
MISCELLANEOUS PARTS AND KITS
FP194A Heat repair kit includes probe,
thermistor control and circuit board 120V
FP226A Heat repair kit includes probe, thermistor control, 240V
FP194C Heat repair kit includes probe,
thermistor control, thermal cutout, 120V
FP226C Heat repair kit includes probe,
thermistor control, thermal cutout, 240V
FP471 Pump & motor complete, 300 psi, 120V
250 Pump rebuild kit, piston and seals
SYP1 Syphon, priming hose
*923 PCB, circuit sensor, 120V only
(Machines made before 7-22-05)
FP350 Reel, complete, with hoses
FP350C Vacuum hose & pressure line, complete, no reel
4/11/2006

Rotomolded Body:
Vacuum:
VAC Shutoff:
Pump:
Waterlift:
Heat:
Heater:
Wand:
Weight:
Lifetime Warranty
7.2” 3-stage
Electronic
Positive displacement 300 psi carpet
140”
Fully adjustable to 212 ºF
2000 Watts
Stainless steel, double bend, twin tip
122 lbs.
SPECIFICATIONS:
208-772-0573 • 800-257-7982 •FAX: [phone]
Coeur d’Alene, Idaho
VISIT US AT: http://www.usproducts.com
KING COBRA®300
120V