Prochem LEGEND GT User manual

8.631-305.0 - A 09/12/08
Operating Instructions (ENG)
MODELS: LEGEND GT
1.001-119.0
Read instructions before operating the machine.
L
LE EG GE EN ND D G GT T
MOBILE CLEANING UNIT

MACHINE DATA LOG/OVERVIEW
86313050 LEGEND GT 09/12/08 1
Welcome…and congratulations on the purchase of your Mobile Cleaning Unit. This instruction manual is a guide
for operating and servicing your unit. Read this manual completely before installing or operating this unit.
This unit offers you personal convenience. All of your instrumentation and controls have been positioned to give
you easy access for operation and daily maintenance.
Proper operation and service are essential to the efficient functioning of this unit. When maintained correctly, this
unit will have a long, trouble-free life.
The service methods described in this manual are explained in such a manner that servicing may be performed
accurately and safely. Proper service varies with the choice of procedure, the skill of the mechanic, and the tools
or parts available. Before attempting any repair, make certain that you are thoroughly familiar with this equipment
and are equipped with the proper tools. Any questions pertaining to operating or servicing this unit should be
directed to your nearest dealer.
THIS UNIT MUST BE INSTALLED BY THE DEALER FROM WHOM YOU PURCHASED IT IN ACCORDANCE
WITH THE PRESCRIBED INSTALLATION PROCEDURES.
MAKE CERTAIN THAT THE WARRANTY CARD IS FILLED OUT AT THE TIME OF INSTALLATION AND IS
RETURNED TO YOUR DEALER.
PROFESSIONAL CHEMICALS CORPORATION
325 SOUTH PRICE ROAD
CHANDLER, ARIZONA 85224
Information in this document is subject to change without notice and does not represent a commitment on the part
of Professional Chemicals Corporation.
Model:
Date of Purchase:
Serial Number:
Dealer:
Address:
Phone Number:
Sales Re
p
resentative:

TABLE OF CONTENTS
86313050 LEGEND GT 09/12/08
2
Machine Data Log.........................................1
Table of Contents .........................................2
Receiving Your Unit......................................4
HOW TO USE THIS MANUAL
How to use this Manual. ...............................1-1
SAFETY
Safety Instructions........................................2-1
Hazard Intensity Level..................................2-3
OPERATION & SYSTEMS
Technical Specifications...............................3-1
Installation Requirements.............................3-2
Fuel Requirements .......................................3-2
Engine Oil Requirements..............................3-2
Chemical Requirements ...............................3-3
Components .................................................3-4
Vacuum System............................................3-7
Water Pumping And Heat
Transfer System ...........................................3-8
Chemical Injection System ......................... 3-10
Pre-run Inspections..................................... 3-11
Water Supply Connections......................... 3-11
High Pressure Hose.................................... 3-11
Vacuum Hose............................................. 3-11
Filters.......................................................... 3-11
Priming the Chemical Pump....................... 3-12
Waste Pump (Optional) .............................. 3-12
Cleaning...................................................... 3-12
Upholstery Cleaning ................................... 3-13
Shutdown and Daily Maintenance.............. 3-13
De-flooding Operations............................... 3-13
Freezing Protection..................................... 3-13
Overheating Protection............................... 3-13
Winterizing Your Unit.................................. 3-14
Removing Anti-freeze from Unit.................. 3-15
MAINTENANCE & SERVICE
Maintenance
Service Schedule....................................4-1
Key Maintenance Checkpoints ...............4-3
Engine.....................................................4-4
Solution Pump.........................................4-5
Water Pump Clutch.................................4-6
Vacuum Inlet Filter..................................4-6
Vacuum Relief Valve...............................4-6
Vacuum Pump Drive Belts......................4-6
Water Pump Drive Belt ...........................4-7
Float Valve (Water Box)..........................4-7
Waste Tank Strainer Basket ...................4-7
Waste Tank Float Valve..........................4-7
Solution Screen (Outlet)..........................4-7
Check Valve (Outlet)...............................4-7
Chemical Pump.......................................4-7
Chemical And Temperature
Control Valves.........................................4-7
Pressure Regulator.................................4-8
Vacuum Hoses........................................4-8
High Pressure Hoses..............................4-8
Optional Waste Pump-out.......................4-8
Service Adjustments
Engine Speed .........................................4-9
Check Valve (Solution Outlet).................4-9
Water Box...............................................4-9
Chemical Pump.......................................4-9
Drive Belts for Water Pump
and Vacuum Pump .................................4-9
Packing Nut Adjustment
(Chemical Metering & Selector Valves) ..4-10
Pressure Regulator.................................4-10
Troubleshooting...........................................4-11

TABLE OF CONTENTS
86313050 LEGEND GT 09/12/08 3
PARTS LIST
Frame...................................................5-1
Side Panel............................................5-3
Control Panel.......................................5-5
Engine..................................................5-9
Vacuum pump......................................5-11
Water Pump & Chemical Pump...........5-13
Heat Exchanger...................................5-17
Pressure Regulator &
Temperature Control Valve..................5-19
Solution Outlet .....................................5-21
Water Box............................................5-23
Waste Tank..........................................5-25
Hose Accessories................................5-27
Battery-Floor Mount.............................5-29
Automatic Pumpout-Optional...............5-31
Wand-Titanium Six Jet-Optional..........5-35
Wand-Quad Jet-Optional.....................5-37
Wand-Tri Jet-Optional..........................5-39
Stair Tool-Optional...............................5-41
Upholstery Tool-Optional.....................5-43
Shelf Assembly-Optional......................5-45
Water Tank, Dual With
Demand Pump-Optional ......................5-47
Water Tank-Demand Pump-Optional...5-49
Auxiliary Water Tank With Pump.........5-51
Auxiliary Water Tank-Optional.............5-53
Hose Reel-Optional..............................5-55
Wiring Diagram....................................5-57
Hose Diagram......................................5-58
Warranty ..............................................5-60

RECEIVING YOUR UNIT
86313050 LEGEND GT 09/12/08
4
ACCEPTANCE OF SHIPMENT
Every part of your cleaning unit was carefully
checked, tested, and inspected before it left our
manufacturing plant. Upon receiving the unit,
make the following acceptance check:
1. The unit should not show any outward signs of
damage. If damaged, notify the delivering carrier
immediately.
2. Check your equipment and packing list. The
cleaning unit should arrive equipped with the
following items (unless otherwise specified).
Note: your distributor from whom you
purchased this mobile cleaning unit is
responsible for the correct installation of this
machine. The dealer is also responsible for
initial training of your operators and
maintenance personnel in the proper operation
and maintenance of this unit.
EQUIPMENT LIST:
1. Console.
2. Waste Tank
3. Hose Clamps For Vacuum Hoses.
4. 100 Ft. Of 2” Vacuum Hose.
5. 1 Vacuum Hose Connection.
6. 100 Ft. Of 1/4" High Pressure Hose With Quick
Connects.
7. 50 Ft. Water Supply Hose With Quick Connect.
8. Installation Bolting Kit.
9. Installation Mounting Plates.
10. Operation And Service Manual For Engine,
Water Pump, And Vacuum Pump.
Each unit will require a fuel system installation kit
that is purchased separately from the unit.

HOW TO USE THIS MANUAL
86313050 LEGEND GT 09/12/08 1-1
This manual contains the following sections:
- HOW TO USE THIS MANUAL
- SAFETY
- SYSTEMS
- OPERATIONS
- MAINTENANCE & SERVICE
- PARTS LIST
The HOW TO USE THIS MANUAL section will tell
you how to find important information for ordering
correct repair parts.
Parts may be ordered from authorized dealers.
When placing an order for parts, the machine model
and machine serial number are important. Refer to
the MACHINE DATA box which is filled out during
the installation of your machine. The MACHINE
DATA box is located on the inside of the front cover
of this manual.
The model and serial number of your machine is on
the side approximately where shown.
The SAFETY section contains important information
regarding hazard or unsafe practices of the
machine. Levels of hazards are identified that could
result in product or personal injury, or severe injury
resulting in death.
The OPERATIONS section is to familiarize the
operator with the operation and function of the
machine.
The MAINTENANCE section contains preventive
maintenance to keep the machine and its
components in good working condition. They are
listed in this general order:
- Engine
- Vacuum Pump
- Water Pump
- Drive Belts, Pulleys & Hubs
- Chemical Pump
- Hoses
- Vac/Exhaust Heat Exchanger
- General Service Adjustments
- Troubleshooting
The PARTS LIST section contains assembled parts
illustrations and corresponding parts list. The parts
lists include a number of columns of information:
- REF – column refers to the reference
- number on the parts illustration.
- PART NO. – column lists the part number
for the part.
- PRV NO. – Reference number.
- QTY – column lists the quantity of the
- part used in that area of the machine.
- DESCRIPTION – column is a brief
- description of the part.
- SERIAL NO. FROM – If this column has an
(*) and a Reference number, see the
SERIAL NUMBERS page in the back of your
manual. If column has two asterisk (**), call
manufacturer for serial number. The serial
number indicates the first machine the part
number is applicable to. The main illustration
shows the most current design of the
machine. When a boxed illustration is
shown, it displays the older design.
- NOTES – column for information not noted
by the other columns.
NOTE: If a service or option kit is installed on
your machine, be sure to keep the KIT
INSTRUCTIONS which came with the kit. It
contains replacement parts numbers needed for
ordering future parts.
NOTE: The number on the lower left corner of
the front cover is the part number for this
manual.
MODEL _______________________________________
DATE OF PURCHASE __________________________
SERIAL NUMBER ______________________________
SALES REPRESENTATIVE # _____________________

SAFETY
86313050 LEGEND GT 09/12/08
2-1
IMPORTANT SAFETY INSTRUCTIONS
When using this machine, basic precautions
must always be followed, including the following:
READ ALL INSTRUCTIONS BEFORE USING THIS MACHINE.
Read the operator's manual before installing or starting this unit. Failure to adhere to instructions could
result in severe personal injury or could be fatal.
Operate this unit and equipment only in a well-ventilated area. Exhaust fumes contain carbon monoxide
which is an odorless and deadly poison that can cause severe injury or fatality. DO NOT run this unit in an
enclosed area. DO NOT operate this unit where the exhaust may enter any building doorway, window, vent, or
opening of any type.
Gasoline is extremely flammable and its vapors can explode if ignited. Store gasoline only in approved
containers, in well-ventilated, unoccupied buildings away from sparks or flames. Never carry any gasoline or
flammable material in the vehicle. Fumes may accumulate inside the vehicle and ignite, causing an explosion.
DO NOT store any type of flammable material in the vehicle.
This unit must be operated with the vehicle or trailer doors open in order to ensure adequate engine
ventilation.
DO NOT operate engine if gasoline is spilled. Avoid creating any ignition until the gasoline has been cleaned
up. Never use gasoline as a cleaning agent.
DO NOT place hands, feet, hair, or clothing near rotating or moving parts. Avoid any contact with moving
parts! Rotating machinery can cause injury or fatality.
Never operate this unit without belt guards or hoods. The high speed moving parts, such as belts and pulleys,
should be avoided while this unit is running. Severe injury, damage, or fatality may result.
DO NOT service this unit while it is running. The high-speed mechanical parts as well as high temperature
components may result in severe injury or severed limbs.
Never touch electrical wires or components while the engine is running. They can be sources of electrical
shock.
Engine components can get extremely hot from operation. To prevent severe burns, DO NOT touch these
areas while the engine is running - or immediately after the engine is turned off.
DO NOT touch the exhaust system while this unit is running. Severe burns may result.
Before servicing this unit, allow it to "cool down." This will prevent burns from occurring.
Water under high pressure at high temperature can cause burns, severe personal injury, or fatality. Shut
down machine, allow to cool down, and relieve system of all pressure before removing valves, caps,
plugs, fittings, filters, and bolts.
Always wear hearing protection when unit is running. Always comply with your company’s Personal
Protection Equipment (PPE) plan. Always comply with local noise ordinance when operating units.
These symbols mean WARNING or CAUTION. Failure to follow warnings and
cautions could result in fatality, personal injury to yourself and/or others, or
property damage. Follow these instructions carefully!

SAFETY
86313050 LEGEND GT 09/12/08 2-2
DO NOT leave the vehicle engine running while operating this unit.
Dangerous Acid, Explosive Gases! Batteries contain sulfuric acid. To prevent acid burns, avoid contact with
skin, eyes and clothing. Batteries produce explosive hydrogen gas while being charged. To prevent a fire or
explosion, charge batteries only in well ventilated areas. Keep sparks, open flames, and other sources of ignition
away from the battery at all times. Keep batteries out of the reach of children. Remove all jewelry when servicing
batteries.
Before disconnecting the negative (-) ground cable, make sure all switches are OFF. If ON, a spark will occur at
the ground cable terminal which could cause an explosion if hydrogen gas or gasoline vapors are present. When
disconnecting the battery, ALWAYS disconnect the negative (-) terminal FIRST.
DO NOT smoke around the unit. Gas fumes may accumulate and be ignited. The battery is also extremely
flammable. This will prevent possible explosions.
DO NOT damage the vehicle in any manner during installation. When routing fuel lines DO NOT place the
hose in any location where damage may occur to the hose or vehicle. Avoid any contact with moving parts, areas
of high temperature, brake lines, fuel lines, muffler, catalytic converter, or sharp objects.
Use only ProChem supplied fuel installation kits. Ensure to use the kit specific for the truckmount model and
van model being used. When traversing the vehicle floor with fuel lines, always use a bulkhead adapter. This will
prevent leakage and ensure that the hose is not punctured by vehicle vibration abrasion.
DO NOT exceed your vehicle's weight limit. The console with empty waste tank and accessories weighs
approximately 810 lbs. Make certain to account for any additional accessories in your weight and balance
calculations. Make certain that the vehicle has the correct axle rating. This will prevent unsafe vehicle driving
conditions.
We require high-back seats on all vehicles in which units are to be installed for head and neck protection.
We recommend using a metal partition between the seats and equipment.
DO NOT operate this unit without the water supply attached and turned on. The water pump and other vital
components may be seriously damaged if this unit is permitted to operate dry without water.
DO NOT operate this unit without the filter installed in the waste tank.
Keep your vehicle work area clean. Wands, stair tools, and other accessories must be securely fastened before
driving the vehicle.
All high pressure hoses must be rated for 3000 PSI at 250°F. Thermoplastic hoses do not meet these
specifications and should not be used. Severe burns and injury may result if the hoses do not meet these
requirements.
The winterizing loop hose assembly, Part #86260700, PRV NO. 10-805380, is for winterizing use only. If
used improperly, live steam may escape from this hose, causing it to whip around. Burns or injury may result.
Make certain that you receive complete training by the distributor from whom you purchased this unit.
This unit uses high pressure and temperature. Improper or irresponsible use may result in serious injury.
Do not modify this unit in any manner. Improper modification can cause severe personal injury or fatality.
CALIFORNIA PROPOSITION 65 WARNING: Engine exhaust from this product contains chemicals known to the
State of California to cause cancer, birth defects, or other reproductive harm. Running with out adequate water
supply could damage water pump. Ensure always to have an adequate water supply.

HAZARD LEVEL INTENSITY
86313050 LEGEND GT 09/12/08
2-3
The following WARNING LABELS are found on your cleaning unit. These labels point out important Warnings
and Cautions which should be followed at all times. Failure to follow warnings and cautions could result in
fatality, personal injury to yourself and/or others, or property damage. Follow these instructions carefully! DO NOT
remove these labels.
NOTE: If at any time the labels become illegible, promptly replace them.
Caution label
86186530
PRV NO. 500770 (2)
Lower front panel decal
With warning labels
86309420
Warning label
86186520
PRV NO. 500769

TECHNICAL SPECIFICATIONS
86313050 LEGEND GT 09/12/08 3-1
ITEM DIMENSION/CAPACITY
Engine speed 2950 rpm
1400 rpm (idle speed)
Water pump rpm 1680 rpm
Vacuum pump rpm 3385 rpm
Water flow rate 3.5 GPM (maximum)
Water pump pressure 1200 PSI (maximum)
Vacuum relief valve 13” Hg
Waste tank capacity 60 gallons
Console weight 600 lbs. (690 lbs. If mounted on water tank)
Console weight (with waste tank & accessories) 810 lbs (If waste tank is empty)
(1325 lbs. If waste tank is full)
(1840 lbs. If auxiliary water tank and waste tank are full)
TORQUE VALUES
Engine rear vac pump pulley 25 foot lbs
Engine front water pump drive pulley 9 foot lbs
Mounting plate screw, M6 55 inch lbs 4.4 foot lbs
Coil plate,1/4” screw 55 inch lbs 4.4 foot lbs
JET SIZING:
Prochem recommends floor tool tip sizing not exceed a total of “.030”. Using larger jet sizes on your
may reduce cleaning temperatures.
Example: Tri-jet wand uses three 95010 jets (95° spray angle w/ 010 orifice).
01 x 3 = 030
Upholstery tool jet size: 80015
Stair tool jet size: 9502

OPERATION
86313050 LEGEND GT 09/12/08
3-2
INSTALLATION REQUIREMENTS
Prior to starting the installation, first read the
ENTIRE "Installation” section of this manual. Since
the cleaning unit (with empty waste tank and
accessories) weighs approximately 810 lbs.
(900 lbs. if mounted on water tank), consider the
following recommendations before installing this
unit.
1. The unit should NOT be mounted in any motor
vehicle of less than 1/2 ton capacity, or 3/4 ton
if equipped with one or more auxiliary fresh
water tanks.
The console with waste tank and accessories
must NOT exceed the vehicle's axle weight limit.
2. If mounting in a trailer, make certain that the
trailer is rated for the total weight of the UNIT
AND TRAILER. Electric or hydraulic brakes
should be provided, and a strict compliance with
any State and Federal vehicle laws must be
maintained.
3. The vehicle tires should have a load rating
above the combined vehicle and unit weight.
4. We do not recommend using flooring materials
that absorb water. This could result in rust and
corrosion of the vehicle floor.
5. Padding under rubber floor mats should be
removed before installing this unit.
6. We highly recommend using a galvanized drip
tray under the console (Part #86050370, PRV
NO. 56-501845, or Part #86050380, PRV NO.
56-501930 for units mounted on a water tank.)
7. If using a trailer, the console should be
positioned so that it balances properly with
respect to the axle. Ten percent (10%) of the
overall unit weight (without accessories or water)
should be on the tongue.
FUEL REQUIREMENTS
Use unleaded gasoline ONLY. DO NOT use any
gasoline additives. We recommend the use of clean,
fresh, unleaded gasoline intended for automotive
use. High octane gasoline should NOT be used with
the engine on this unit. These engines are NOT
designed to use E-85 or Flex Fuels.
ENGINE OIL REQUIREMENTS
Use high quality detergent 10W-30 oil of at least API
(American Petroleum Institute) service class SG,
SH, SJ or higher.
NOTE: Using a lower service class oil or extending
oil change intervals longer than recommended can
cause engine damage.
NOTE: Synthetic oils meeting the listed
classifications may be used with oil changes
performed at recommended intervals. However to
allow piston rings to properly seat, a new or rebuilt
engine should be operated for at least 50 hours
using standard petroleum based oil before switching
to synthetic oil.
ALTITUDE REQUIREMENTS
Engines perform differently with
increases/decreases in altitude. Be sure to check
engine speeds during initial installation. See engine
speeds in Technical Specifications section.
NOTE: To ensure correct engine operation at
altitudes above 1525 meters (5000 ft), it may
be necessary to have an authorized Kohler
dealer install a special high altitude jet kit in
the carburetor. If a high altitude kit has been
installed, the engine must be reconverted to
the original jet size, before it is operated at
lower altitudes, or overheating and engine
damage can result.

OPERATION
86313050 LEGEND GT 09/12/08 3-3
CHEMICAL REQUIREMENTS
The unit, due to its chemical injection pump design,
can be used with a variety of water-diluted chemical
compounds (either acidic or alkaline), depending on
the job to be done. However, to obtain optimum
results with this unit, we recommend using the
Prochem line of chemicals. For information on using
the cleaning compounds, refer to the chemical
manual.
WATER REQUIREMENTS
Hard water deposits will adversely affect the
plumbing and heat exchange systems on this unit.
The map below will give you an idea of where areas
of high water hardness may occur. However, any
water supply obtained from a well is almost always
hard water and a water softener will be needed to
protect your equipment.
NOTE: Equipment malfunction or component
failure caused by hard water scaling is NOT
covered under the warranty.
If you are operating this unit in an area where the
unit will be using water in which the hardness
exceeds 3-1/2 grains, we highly recommend a
suitable water softener be installed. If using a water
softener, it must have a five (5) GPM (or greater)
flow capacity without any hose constrictions.
Using a water softener will reduce maintenance and
decrease down time caused by hard water scaling. It
will also allow cleaning chemicals to be more
effective in lower concentrations.
If you require a water softener, your dealer has a
model to meet your needs. Please contact your
nearest distributor for information, price, and
availability.

OPERATION
86313050 LEGEND GT 09/12/08
3-4
REGULATOR
SOLUTION PRESSURE
SOLUTION TEMPERATURE
CONTROL
FLOWMETER
PRIME
CHEMICAL
SOLUTION OUTLET
CHEMICAL
CHECK
VALVE
LUBRIC ATE
WITH VACUUM
INLE TS SEALED
SOLUTION
SCREEN
TEMPERATURE
BALANCE
ORIFICE
WARM HOT
STARTING
CONDENSED OPERATING INSTRUCTIONS
STARTING
CONDENSED OPERATING INSTRUCTIONS
1. CONNEC TWA TER HOS ET OWATER INLET C ONNECTION AND TURN O NWATER
SU PP LY.
2. CONNECT SOLUTION AN D VACUUM HOS E TO THE DESIR ED CLEANIN G T OOL
AN D TO THE CONSO LE.
3. PULL OUT TH ROTTLE 3/4 INC H.
4. PULL OUT ENGINE CHOKE, TURN SOLU TION PUMP S W ITCH TO OVERRI D E
POSITIO N AND TURN INGNITION S WI TCH TO S TART.
5. PUSH IN CH OKE AND RE LEASE OVERRIDE SWITCH AFTERENGINE HAS
STARTED.
6. IN SER T CHEMICAL INLE T AND PRIME HOSES IN TO CHEMICAL C ONTAINE R.
7. TURN ON SOL UTION PUMP AND R OTATE C HEMICA L V ALVE TO P RIME A N D
ALLOW CHEMICA LT
OFLOW THROUGH THE CHEMICAL CIRC U IT. AFTERALL
AIR BUB BLES HAVEBEENREM OVE D, TURN THE CHEMICA LVALVET O THE
ON POSI TIO N.
8. TURN THE CHEMICA L VALVE TO RUN, OPEN TH E VAL VE O N T HE C L E ANI N G
TOOL AND SET THE CHEMIC AL F LOW VAL VE T O THE DESIR E D CHE MIC AL
FLO W R ATE WHILE OB SERVING THE FLOW METE R.
9. SET T H ROT TLE TO THE D ESIR ED OPER ATING SP E ED.
10. FOR QUI CK H EAT-UP REFE R TO THE OP ER ATING INSTRU C TION M ANUAL.
1. TURN CHEMICAL VALVE TO THE OFF POS ITION, AND REMOVE THE
VACUUM HOSE.
2. AL LOW THE UNIT TO RUN FOR 2 M INUTES WITH THE VACUUM HOS E
DISCONNECTED TO REMOVE MOISTURETHEN SPR AY A W ATER
DISPLACEMENT/LUBRICANT IN TO THE VACUU M LUBRIC ATION CU P.
THIS WILL PREVENT CORROSIONDUE TO MOISTURE.
3. PUSHTHE THR OTTLE “IN” TO THE IDLEPOSITION ANDOPEN THE
TEMPER ATURE BY PASS VALVE FOR 2 MINUTES AL LOWING THE UNIT
TO COOL DOWN.
4. TURN OFF IGNITION SWI TCH.
5. D ICONNEC T AL L HO SES AND TO OL S.
6. DRAIN WASTE TANK IN TO AN APPROVED SOUR CE AND CLEAN THE
ST RAINER B ASK ET AND WASTE TA NK FI LTER.
19
20
21
22
23
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 17 18
OFF
ON

OPERATION
86313050 LEGEND GT 09/12/08 3-5
COMPONENTS
1. VACUUM GAUGE
This gauge indicates in inches of mercury how
much vacuum the system is producing at any given
time.
2. SOLUTION PRESSURE GAUGE
This gauge registers the amount of pressure in the
system.
3. WASTE PUMPOUT (OPTIONAL)
This switch actuates the optional waste
pumpout.
4. SOLUTION TEMP GAUGE
This gauge measures the temperature of the
cleaning solution exiting the machine.
5. SOLUTION PUMP SWITCH
This switch serves to energize the magnetic clutch,
to turn the pump on and off. Turn clockwise to
activate the pump and counter clockwise for de-
activating the pump.
6. CHOKE
The choke is for restricting air to the carburetor, this
enriches the fuel mixture. The primary purpose is
for starting in cold temperatures. When the cable is
pulled out air is restricted, when pushed in the
engine is in run position.
WARNING: Do NOT run engine with choke pulled
out.
7. IGNITION SWITCH
The key switch controls the power for the machine.
To turn the machine on, rotate the key clockwise
while holding solution pump switch to override
position until the starter engages the
engine. When machine is running let off the switch
and engine will continue to run. To turn power off,
rotate key counter clockwise to stop position,
engine will then stop.
8. THROTTLE
The throttle cable is used to set the speed of the
engine (rpm). The engine speed (rpm) may be
increased by releasing the collar lock, pushing in
the red button on the end of the handle, and
pulling the handle straight out. Engine speed
may be changed in smaller increments by
rotating the throttle handle clockwise or counter-
clockwise. The collar lock can be tightened to
prevent the throttle from slipping and changing
the engine speed.
9. HOUR METER
The hour meter records the number of hours the
unit has run. This serves as a time recorder for
servicing the machine.
10. CIRCUIT BREAKERS
These serve to protect the circuits from electrical
spikes and over loads and protects wires from
damage.
11. TEMPERATURE BALANCE ORIFICE
The temperature balance orifice helps to
balance and stabilize the solution temperature
within the system.
12. SOLUTION PRESSURE REGULATOR
The pressure regulator sets the pressure of the
solution system. This spring loaded valve can
be adjusted up or down setting the pressure of
the unit. The pressure is increased by turning
the valve clockwise, or reduced by turning the
valve counter clockwise. (This valve must be
maintained in accordance with this manuals
maintenance table.)
13. LUBRICATION CUP
The lubrication cup allows lubricant spray to
reach the vacuum blower.

OPERATION
86313050 LEGEND GT 09/12/08
3-6
14. TEMPERATURE CONTROL VALVE
This valve allow the operator to control the solution
temperature by bypassing hot water to the waste
tank, for low temperature cleaning such as
upholstery. Turning the valve counter clockwise
opens the valve. Turning clockwise closes the
valve and has the effect of stopping water from
bypassing.
15. CHEMICAL CHECK VALVE
The chemical check valve allows chemicals to enter
the system and travel in a singular direction to the
wand. The chemical check valve prevents
chemicals from traveling upstream into the solution
system of the unit.
16. SOLUTION OUTLET
The solution outlet is the connecting point for the
high pressure cleaning hoses. This outlet has a
quick disconnect that allows hoses to be plugged
into the unit.
17. SOLUTION SCREEN
The solution screen is located on the front of the
machine. The function of this screen is to trap
foreign particles from exiting the machine and
plugging the orifices of the cleaning tool.
18. EXHAUST
Exhaust fumes contain carbon monoxide which is
an odorless and deadly poison that can cause
severe injury or fatality. DO NOT run this unit in an
enclosed area. DO NOT operate this unit where the
exhaust may enter any building doorway, window,
vent, or opening of any type
19. WATER INLET
This quick connect allows the water supply hose
to be connected to the unit.
20. VACUUM INLET
The vacuum inlet serves as the connecting point
for vacuum hoses.
21. CHEMICAL CONTROL VALVE (PRIME
POSITION)
This valve allows the chemical to circulate
through the chemical system with little or no
restriction. It also purges out air that may be
trapped in the lines and cavities of the chemical
pump. By turning the valve clockwise the
injection system is enabled.
22. CHEMICAL METERING VALVE (CHEMICAL
CONTROL VALVE IN RUN)
The chemical metering valve regulates the
amount of chemical that is injected into the
system. Clockwise rotation of the knob closes
the valve. Counter clockwise rotation opens the
valve, allowing more chemical to enter the
system.
23. FLOW METER
The flow meter is a gauge to indicate how much
liquid chemical is being introduced in the water
system. The quantity can be increased by
turning the chemical flow knob counter
clockwise.

OPERATION
86313050 LEGEND GT 09/12/08 3-7
VACUUM
GAUGE
LUBRICATION
CUP
VACUUM
SILENCER
VACUUM
RELIEF
VALVE
LEVEL SENSOR
(ENGINE SHUT-OFF SWITCH)
FILTER
HOT AIR TO
HEAT EXCHANGER
VACUUM
INLET
STRAINER WASTE TANK
VACUUM
PUMP
VACUUM SYSTEM
The engine turning an air pump (vacuum pump)
generates vacuum. The air is channeled in one
side of the vacuum pump, compressed and
discharged on the opposite side, creating
airflow. This airflow is used to do the work
necessary for the extraction process. A vacuum
nozzle applied to the carpet surface removes
moisture, dirt and spent chemicals. These
elements are conveyed back to a separating
tank utilizing hoses and the force of air.
Particles of moisture and dirt are separated in
the vacuum tank using a series of changes in
direction and velocity. The air is then filtered
and rushes into the vacuum pump.
The vacuum pump also heats incoming air as it
is compressed. The hot discharged air is forced
down stream into a silencer for noise abatement.
Exiting the silencer, this hot air is forced through
the heat exchanger
The vacuum pump speed is factory set to
maximize vacuum pressure and provide
sustained system life. Do not alter the vacuum
speed outside the recommended range shown
in the Technical Specifications section.

OPERATION
86313050 LEGEND GT 09/12/08
3-8
Always wear hearing protection and proper
personal protection equipment when operating
unit.
WATER PUMPING AND HEAT
TRANSFER SYSTEM
WATER PUMPING AND HEAT TRANSFER
SYSTEM
Cold water enters the console through the water
inlet. When the water box is full the valve will
automatically shut off.
Water flows from the water box, into the solution
pump where it is pumped to the pressure regulator
manifold which provides and maintains the desired
pressure setting.
The pressure regulator manifold includes a pulse
hose, which helps reduce pressure spikes from the
pump.
A certain amount of water is by-passed from the
pressure regulator due to an over pumping capacity
of the solution pump. Water that is not called for in
the cleaning process is channeled through the
copper bypass radiator core in the front of the heat
exchanger. This bypass water may circulate several
times through the bypass heat exchanger core
allowing the water to be pre-warmed.
The gases coming from the vacuum pump and the
engine are forced through heater cores #2 and #3
creating the hottest area of the heater box,
increasing the heat transfer to the circulating water.
The hot water passes to the solution outlet manifold
where cleaning chemicals are injected from the
chemical pulse pump. This manifold serves as a
connecting point for the high-pressure hoses. Also a
check valve is located in this outlet manifold
prohibiting chemicals from backing up into the
system.
The cleaning solution then passes through high-
pressure hoses and is distributed by the cleaning
tool to a surface that is being cleaned, completing
the water pumping and heating cycle of the cleaning
unit
HEAT EXCHANGER
The water temperature in the plumbing system is
raised for better cleaning. This happens in the heat
exchanger. The heat exchanger is made up of three
stages. These three stages are engine exhaust
stage, the mixing stage, and the pre-warming stage.
The angled rear heat exchanger core receives its
heat only from the engine exhaust gases. This core
becomes extremely hot and should not be touched
while the machine is in operation. Allow the machine
to cool down completely before attempting to service
this area.
The second core receives its heat from the mixing of
both the engine exhaust and the vacuum pump
exhaust. The vacuum pump heats incoming air as it
is compressed. This hot air is mixed with the hot
engine exhaust gases exiting the first core. This
mixture of hot air and gases is then forced through
the middle core and on through the front heat
exchanger core.
The third core continues to extract heat from the
mixed gases; but, this heat is used to pre-heat the
water box as a preliminary hot water reservoir.

OPERATION
86313050 LEGEND GT 09/12/08 3-9
SOLUTION
OUTLET
WATER
INLET
CHEMICAL
INJECTION
WASTE TANK
WATER BOX
WATER PUMP
KOHLER ENGINE
HEAT EXCHANGER
CORES
TEMPERATURE
RELIEF VALVE
PRESSURE
GAUGE
CHECK VALVE
PRESSURE REGULATOR
= COLD WATER
= WARM WATER
= HOT WATER
= HOT EXHAUST AIR
SOLUTION SCREEN TEMPERATURE
BALANCE ORIFICE
HOT AIR FROM
VACUUM PUMP
REAR
FRONT
PULSE HOSE
TEMPERATURE
CONTROL VALVE

OPERATION
86313050 LEGEND GT 09/12/08
3-10
CHEMICAL INJECTION SYSTEM
The chemical injection system is unique in that it
utilizes the pressure spikes generated by the high-
pressure water pump to move chemical into the
main pressure stream. The high pressure spikes
move the diaphragm in the chemical pulse pump
forcing small amounts of liquid chemical to be
moved in a single direction of flow with the aid of two
check valves.
The chemical is sucked up from the container and
fed through the flow meter to the chemical pulse
pump where it is pressurized.
After being pressurized by the chemical pulse pump
the chemicals are the fed to the control valve which
directs the chemical either into a bypass loop to
purge air from the system or in to the solution
metering valve.
The metering valve creates an orifice allowing the
correct amount of chemical to enter the outlet
manifold. The outlet manifold assembly is complete
with a check valve that will not allow the chemicals
to travel upstream into the plumbing system of the
unit.
The chemicals are then mixed with hot pressurized
water that make up a solution for the chosen
cleaning application.
CHEMICAL JUG CHEMICAL PUMP
WATER PUMP
SOLUTION OUTLET
OFF
ON
FLOW METER PRIME
METERING VALVE
CONTROL VALVE
OUTLET CHECK VALVE
OUTLET SCREEN