Mi-T-M Work Pro WP Series User manual

WP-Cold Water Direct Driven Operator’s Manual 1
©Copyright 2006 Mi-T-M Corporation®Form #37-0459-E/S-020923
WP-SERIES
OPERATION MANUAL
COLD WATER DIRECT DRIVEN
PRESSURE WASHER
CAUTION
RISK OF INJURY!
READ MANUAL BEFORE OPERATING!
This manual is an important part of
the pressure washer and must
remain with this unit!
THE WORK PRO®
PARTS LIST

2 WP-Cold Water Direct Driven Operator’s Manual
TABLE OF CONTENTS
INTRODUCTION .............................................................................................................3
IMPORTANT SAFETY WARNINGS............................................................................. 4-7
FIRE & VENTILATION PRECAUTIONS .........................................................................................................4
SPRAY PRECAUTIONS................................................................................................................................5
DETERGENT CLEANING PRECAUTIONS ...................................................................................................6
MISCELLANEOUS SAFETY PRECAUTIONS ...............................................................................................6
ADJUSTMENT PRECAUTIONS....................................................................................................................7
FEATURES DRAWING ....................................................................................................8
SAFETY DECALS ............................................................................................................9
INSTALLATION & PREPARATION.......................................................................... 10-13
ATTIRE .......................................................................................................................................................10
SETUP .......................................................................................................................................................10
ENGINE FUEL TANK ..................................................................................................................................10
NOZZLE REVIEW .......................................................................................................................................11
NOZZLE CONNECTION.............................................................................................................................11
WATER SUPPLY .........................................................................................................................................12
UNLOADER ................................................................................................................................................12
THERMAL RELIEF VALVE ..........................................................................................................................12
PRE-START INSPECTION PROCEDURES.................................................................................................13
OPERATING INSTRUCTIONS ................................................................................ 14-15
PRIMING THE PUMP .................................................................................................................................14
START-UP...................................................................................................................................................14
CLEANING WITH DETERGENTS ...............................................................................................................15
SHUTDOWN...............................................................................................................................................15
STORAGE & MAINTENANCE................................................................................. 16-17
SPECIFIC MAINTENANCE ........................................................................................................................16
WINTERIZING.............................................................................................................................................17
TROUBLESHOOTING...................................................................................................18
STATEMENT OF WARRANTY ......................................................................................19
WARNING: This product can expose you to
chemicals including Lead, which is known to
the State of California to cause cancer and birth
defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING
WARNING: This product can expose you to
chemicals including carbon monoxide, which is
known to the State of California to cause birth
defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING

WP-Cold Water Direct Driven Operator’s Manual 3
INTRODUCTION
Congratulations on the purchase of your Work Pro® pressure washer! You can be assured your Work Pro®
pressure washer was constructed with the highest level of precision and accuracy. Each component has been
rigorously tested by technicians to ensure the quality, endurance and performance of this unit.
This operator’s manual was compiled for your benet. By reading and following the simple safety, installation,
operation, maintenance and troubleshooting steps described in this manual, you will receive years of trouble free
operation from your Work Pro® pressure washer. The contents of this manual are based on the latest product
information available at the time of publication. Mi-T-M® reserves the right to make changes in price, color, ma-
terials, equipment, specications or models at any time without notice.
! IMPORTANT !
THESE PARAGRAPHS ARE SURROUNDED BY A “SAFETY ALERT BOX”. THIS BOX IS USED
TO DESIGNATE AND EMPHASIZE SAFETY WARNINGS THAT MUST BE FOLLOWED WHEN
OPERATING THIS PRESSURE WASHER. ACCOMPANYING THE SAFETY WARNINGS ARE
“SIGNAL WORDS” WHICH DESIGNATE THE DEGREE OR LEVEL OF HAZARD SERIOUSNESS. THE
“SIGNAL WORDS” USED IN THIS MANUAL ARE AS FOLLOWS:
DANGER: INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL
RESULT IN DEATH OR SERIOUS INJURY.
WARNING: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN DEATH OR SERIOUS INJURY.
CAUTION: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED MAY
RESULT IN MINOR OR MODERATE INJURY.
THE SYMBOLS BELOW THIS PARAGRAPH ARE “SAFETY ALERT SYMBOLS”. THESE SYMBOLS ARE
USED TO CALL ATTENTION TO ITEMS OR PROCEDURES THAT COULD BE DANGEROUS TO YOU
OR OTHER PERSONS USING THIS EQUIPMENT.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ ALL
INSTRUCTIONS BEFORE OPERATING THIS PRESSURE WASHER AND ESPECIALLY POINT OUT
THE “SAFETY WARNINGS” TO PREVENT THE POSSIBILITY OF PERSONAL INJURY TO THE
OPERATOR.
Once the unit has been removed from the box, immediately write in the serial number of your unit in the space
provided below.
SERIAL NUMBER_________________________________
Inspect for signs of obvious or concealed freight damage. If something appears to be damaged, DO NOT RE-
TURN TO PLACE OF PURCHASE. Contact your Customer Service Representative @ 800-228-6172.
Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase

4 WP-Cold Water Direct Driven Operator’s Manual
FIRE & VENTILATION PRECAUTIONS:
1. This unit was designed for outdoor use only. NEVER operate this unit in
an enclosed area. ALWAYS make certain there is adequate air (oxygen)
for combustion as well as ventilation to prevent the presence of poisonous
carbon monoxide gases. Beware of poorly ventilated areas or exhaust fans
which can cause inadequate combustion or engine overheating.
2. NEVER operate this unit in the presence of ammable vapors or combustible
dust,gasesor other combustiblematerials. (Asparkmay cause anexplosion
or re.) When servicing this machine, be especially careful to properly
dispose of any ammable materials. DO NOT spray ammable liquids.
3. ENGINE FUEL TANK:
a. DO NOT SMOKE WHILE FILLING ENGINE FUEL TANK
b. NEVER ll the engine fuel tank while the unit is running or hot. Allow
the engine to cool two minutes before refueling.
c. DO NOT refuel indoors or in a poorly ventilated area.
d. ALWAYS refuel slowly to avoid the possibility of spilled fuel which may
cause a risk of re.
4. DO NOT operate the unit if gasoline is spilled. Wipe unit clean and move
the unit away from the spill. Avoid creating any ignition until the gasoline
has evaporated.
5. DO NOT store the unit near an open ame or any equipment such as a
stove, furnace, water heater, etc., which utilizes a pilot light or devices
which can create a spark.
IMPORTANT
The following is required by California State law, Section 4442 of the Cali-
fornia Public Resources Code. Other states may have similar laws. Federal
laws apply on federal lands.
A SPARK ARRESTER MUST BE ADDED TO THE MUFFLER OF THIS
ENGINE IF IT IS TO BE USED ON ANY FOREST COVERED,
BRUSH COVERED OR GRASS COVERED UNIMPROVED
LAND. THE ARRESTER MUST BE MAINTAINED IN EFFECTIVE
WORKING ORDER BY THE OPERATOR.
See your engine or equipment dealer for spark arrester mufer options.
IMPORTANT SAFETY WARNINGS

WP-Cold Water Direct Driven Operator’s Manual 5
SPRAY PRECAUTIONS:
DANGER: RISK OF INJECTION OR SEVERE CUTTING INJURY!
KEEP CLEAR OF NOZZLE! DO NOT DIRECT DISCHARGE
STREAM AT PERSONS OR PETS! ONLY TRAINED OPERATORS
SHOULD USE THIS PRODUCT. WHEN OPERATING THIS UNIT,
BASIC PRECAUTIONS SHOULD ALWAYS BE OBSERVED
INCLUDING THE FOLLOWING:
1. KEEP AWAY FROM THE SPRAY:
a. Because of the high pressure and velocity of the spray, uids can
penetrate the skin, causing serious injury.
b. Never point the gun at yourself or anyone else. Never put your hand,
ngers or body directly over the spray nozzle. Always keep operating
area clear of all persons. Use extreme caution when operating near
children.
c. If an accident does occur and the spray appears to have penetrated
the skin, SEEK EMERGENCY MEDICAL CARE. DO NOT TREAT AS
A SIMPLE CUT. If you are using cleaning agents, be prepared to tell
a physician exactly what kind.
2. ALWAYS wear protective goggles when operating the unit to shield the
eyes from ying debris and detergents. Other protective equipment such
asrubbersuits,gloves and respiratorsareadvisable,especially when using
cleaning detergents. Use extreme caution when operating near children.
3. Stay alert-watch what you are doing. Do not operate the unit when fatigued
or under the inuence of alcohol or drugs.
4. NEVER squeeze the trigger unless securely braced. The thrust from the
water traveling through the nozzle may be powerful enough to cause the
operator to lose balance if unprepared. DO NOT overreach or stand on
unstable support. Wet surfaces can be slippery, wear protective foot gear
and keep good footing and balance at all times. NEVER trigger the gun
while on a ladder or roof.
5. Caution should be used when directing spray toward fragile materials
such as glass. Shattering could result in serious injury.
6. ALWAYS hold on rmly to the gun/wand assembly when starting and
operating the unit. Failure to do so can cause the wand to fall and whip
dangerously. NEVER operate the gun with the trigger wired in the open
position. To prevent accidental discharge, the trigger gun should be
securely locked when not in use.
7. DO NOT direct spray on or into electrical installations of any kind! This
includes electrical outlets, light bulbs, fuse boxes, transformers, etc.
Severe electrical shock may occur.
8. Even after you shut off the unit, there is high pressure water left in the
pump, hose and gun until you release it by triggering the gun. Before
removing the spray nozzle or servicing the unit, ALWAYS shut off the unit
and trigger the gun to release trapped pressure.
IMPORTANT SAFETY WARNINGS

6 WP-Cold Water Direct Driven Operator’s Manual
DETERGENT CLEANING PRECAUTIONS:
1. DO NOT use solvents or highly corrosive detergents or acid type cleaners
with this pressure washer. Use only Mi-T-M detergents.
2. KNOW YOUR DETERGENTS! Be prepared to tell a physician exactly what
you are using in the event of an emergency. Read the Material Safety
Data Sheet (MSDS) provided with your detergent and all detergent labels.
Follow all appropriate instructions regarding preparation use, safety and
transportation. Keep ALL detergents out of the reach of children.
3. DO NOT use this pressure washer to dispense hazardous detergents.
4. DO NOT alter the detergent injection feature in any manner not prescribed
in this manual. Use only genuine Mi-T-M replacement parts for necessary
repairs.
MISCELLANEOUS SAFETY PRECAUTIONS:
1. NEVER ALLOW CHILDREN OR ADOLESCENTS TO OPERATE THIS UNIT!
2. Readandfollow allhandling,operations, maintenanceandsafety instructions
listed in this manual and the Engine Operator’s manual that accompanies
this unit, and provide such information to ANYONE who will be operating
this unit.
3. In freezing temperatures, the unit must always be warm enough to ensure
there is no ice formation in the pump. DO NOT start this unit if it has been
transported in an open or underheated vehicle without rst allowing the
pump to thaw.
4. When connecting the water inlet to the water supply mains, local regulations
of your water company must be observed. In some areas the unit must
not be connected directly to the public drinking water supply. This is to
ensure that there is no feedback of the detergents into the water supply.
(Direct connection is permitted if a back ow preventer is installed.)
5. DO NOT allow any part of your body or the high pressure hose to make
contact with the mufer. Avoid dragging the hose over an abrasive surface
such as cement. This causes wear and eventual rupturing.
6. High pressure hoses should be inspected daily for signs of wear. If evidence
of failure exists, promptly replace all suspect hoses to prevent the possibility
of injury from the high pressure spray. If a hose or tting is leaking , NEVER
place your hand directly on the leak.
7. DO NOT operate the unit without all protective covers in place.
8. NEVER run the unit with the governor disconnected or operate at excessive
speeds.
9. To reduce the risk of injury, maintain a safe distance for persons while
operating this unit. Close supervision is necessary when operating the unit
near children.
10. DO NOT leave pressurized unit unattended. Shut off the unit and release
trapped pressure before leaving.
11. DO NOT move the unit by pulling on the hose.
IMPORTANT SAFETY WARNINGS

WP-Cold Water Direct Driven Operator’s Manual 7
ADJUSTMENT PRECAUTIONS:
1. NEVER alter or modify the equipment, be sure any accessory items and
system components being used will withstand the pressure developed.
Use ONLY genuine Mi-T-M parts for repair of your pressure washer.
Failure to do so can cause hazardous operating conditions and will void
warranty.
2. NEVER make adjustments to the machinery while it is connected to the
engine without rst removing the ignition cable from spark plug. Turning
the machinery over by hand during adjustment or cleaning might start
the engine and machinery with it, causing serious injury to the operator.
3. Know how to stop the pressure washer and bleed pressures quickly.
Be thoroughly familiar with controls.
4. Before servicing the unit; turn the unit off, relieve the water pressure, and
allow the unit to cool down. Do not make repairs while unit is running.
Service in a clean, dry, at area. Block the wheels to prevent the unit
from moving.
5. Follow the maintenance instructions specied in this manual.
! SAVE THESE INSTRUCTIONS !
IMPORTANT SAFETY WARNINGS

8 WP-Cold Water Direct Driven Operator’s Manual
FEATURES
FEATURES LISTING
WP/JP FEATURES-041806-JJT
1. Detergent Hose
2. Detergent Strainer
3. Water Inlet
4. Water Inlet Strainer
5. Water Outlet
6. Thermal Relief Valve
7. Engine
8. Decal- Warning: Risk of Burns
9. Decal- Caution: Risk of Fire
10. Adjustable Unloader Knob
11. Pump
12. Oil Sight Glass (select models only)
13. Decal- Warning/Caution/Operation
14. High Pressure Discharge Hose
15. Gun Assembly
16. Decal- Warning: Risk of Injection
17. Quick Connect Nozzle

WP-Cold Water Direct Driven Operator’s Manual 9
WARNING: DO NOT REMOVE SAFETY DECALS FROM UNIT UNLESS REPLACING WITH MOST CURRENT
SAFETY DECAL!!!
SAFETY DECALS
Decal: Warning/Caution/Operating Statements (Part #34-1244)
CAUTION/PRECAUCIÓN
Do not add fuel when
product is operating. Allow
engine to cool for two (2)
minutes before refueling.
34-0599/07262012
RISK OF FIRE RIESGO DE FUEGE
No ponga combustible cuando el
producto este en operacion.
Permita que el motor se enfrie
por 2 minutos antes de
reablastecer de combustible.
RISK OF INJECTION OR SEVERE INJURY
Never put your hand, fingers or body directly
over the spray nozzle. 34-1253/07272012
RIESGO DE INYECCIÓN O LESIÓN SEVERA
Nunca coloque la mano, los dedos o el cuerpo
directamente sobre la boquilla de rocío.
WARNING ADVERTENCIA
WARNING/ADVERTENCIA
RISK OF BURNS
Muffler and adjacent
areas may exceed
150°F.
RIESGO DE QUEMAR
El amortiguador y las areas
adyacentes pueden Tener
temperaturas por arriba de 65°C.
34-0598/07262012
•Risk of injection or severe injury. Keep clear of nozzle do not direct spray
toward any person or self.
•Risk of asphyxiation. Outdoor use only required.
•Risk of fire. Do not smoke while refueling. Allow to cool two to three
minutes before refueling. Do not operate while refueling.
•Risk of electrocution. Do not direct spray toward any electrical
connections, outlets or power lines.
•Risk of explosion. Do not spray flammable liquids.
•Risk of injury. Use only properly rated equipment.
•To reduce risk of injury: read and understand the operation manual and
all instructions before using.
•Stay alert: hold onto gun/wand firmly with both hands to avoid
dangerous kickbacks.
•Always wear eye protection.
•Do not overreach or stand on unstable support. Keep good footing and
balance at all times.
•Always turn on water supply to pump before starting.
•Protect pump from freezing.
•Engage trigger safety lock-off when not in use.
•After ensuring all connections are secure, open inlet water supply completely. Do not
operate without water. Do not use water that is over 125 °f.
• With gun locked, remove nozzle. Point gun in a safe direction. Brace wand securely to
avoid recoil. Squeeze trigger open. Steady the unit and start by pulling on the starter
rope.
• After engine is running, lock gun and insert desired nozzle. Point gun in a safe
direction. Unlock gun and squeeze trigger to spray and release the trigger to stop
spray.
• After stopping the engine, always turn off water supply and squeeze trigger to release
trapped pressure.
•Para reducir el riesgo de que ocurran lesions: lea y entienda el manual
de operacion y todas las instrucciones ante de usar el producto.
•Permanizca alerta: sostenga la pistola varilla firmenmente con ambas
mano para evitar golpes de retroceso peligrosos.
•Use siempre proteccion ocular.
•No se extienda demasiado o se pare en un apoyo inestable.
Mantenga una buena posicion y balance todo el tiempo.
•Antes de comenzar. Abra sienpre el suminstro de agua a la bomba.
•Proteja la bomba de la congelacion.
•Coloque el suguro del gatillo en la posicion apagado cuando no este
usando el producto.
•Dispues de asegurarse que todas las conexiones estan seguirse. Abra la
entrada del suminstro de agua completament no se opere sin agua. No se use
con agua con temperaturas de mas de 125 °f.
•Con la pistola asegurada. Remueva la boquilla apuntando la pistola hacia una
direccion segura. Refurese la vara para evitar que retroceda. Apriete el gatillo
para abrirlo. Mantega la unidad quieta. Y comienze halando firmemente en la
cuerda de iniciar.
•Despues de que el motor este trabajando. Adjuste la boquilla a la posicion
deseada. Apriete el gatillo para rociar y sueltelo para detener el rociado.
•Despues de detener el motor. Cierre diempre el suminstro del agua and
apriete el gatillo para liberar la presion atrapada.
WARNING/ADVERTENCIA CAUTION/PRECAUCION OPERATION/OPERACION
34-1244-E/S-021401-ENG.
•Riesgo de inyeccion o lesion severa. Mantenga la boquilla despejada.
No dirija el chorro hacia persona aluna o hacia usted.
•Riesgo de asfixia: unicamente para uso en el exterior.
•Riesgo de fuego: no fume mientras este reabastecimiento de combustible.
Permita que el motor se enfrie dos o tres minutos antes del
reabastecimiento. No opere el producto durante el reabastecimiento.
•Riesgo de electrocucion: no directa el chorro hacia conexiones, electricas,
tomas de corriente o lineas de alimentacion de corriente.
•Riesgo de explosion: no rocie liquidos inflammables.
•Riesgo de lesion: use unicamente equip con clasificacion adecuada.
Decal: Caution-Engine Fuel (Part #34-0599)
Decal: Warning-Risk of Injection (Part #34-1253)
Decal: Warning-Mufer Hot (Part #34-0598)

10 WP-Cold Water Direct Driven Operator’s Manual
INSTALLATION & PREPARATION
ATTIRE:
Proper attire is essential to your safety. It is advised to utilize whatever
means necessary to protect eyes, ears, and skin. Additional safety attire
(such as respiratory mask) may be required when using detergent cleaning
agents with this washer.
SETUP:
1. This unit should only be placed on a level surface to ensure proper lubrication
for the engine and water pump while operating.
2. Do not use unit in an area:
a. with insufcient ventilation.
b. where there is evidence of oil or gas leaks.
c. where ammable gas vapors may be present.
3. Becertainto block thewheelsto preventtheunit frommoving while operating.
4. Do not allow the unit to be exposed to rain, snow or freezing temperatures.
If any part of the unit becomes frozen, excessive pressure may build up in
the unit which could cause it to burst resulting in possible serious injury to
the operator or bystanders.
5. Before initial use, ensure the oil cap/dipstick is inserted into the pump.
Becauseofvaryingshippingrequirements,the pump may need tobeshipped
with an oil travel plug instead of the dipstick in the pump. If your pump has
been shipped with an oil travel plug, you will need to remove it and replace
the plug with the oil dipstick provided with the unit.
6. Once properly installed, check the oil level. Depending on your unit, either
by the oil sight glass on the pump crankcase (be certain the oil level is in
the center of the sight glass before each use) or by the dipstick. If the level
appears to be low, add pump oil. (Refer to the parts listing for the correct
pump oil) DO NOT OVERFILL!
DANGER RISK OF
EXPLOSION OR FIRE!
DO NOT PLACE UNIT IN AN
AREA WHERE FLAMMABLE GAS
VAPORS MAY BE PRESENT. A
SPARK COULD CAUSE AN EX-
PLOSION OR FIRE!
RISK OF UNIT BURSTING!
DO NOT STORE/OPERATE UNIT
IN A FREEZING ENVIRONMENT!
WARNING RISK OF
ASPHYXIATION!
-DO NOT OPERATE IN AN
ENCLOSED AREA. USE THIS
PRODUCT ONLY IN WELL VEN-
TILATED AREAS!
-THE EXHAUST FROM THE
ENGINE CONTAINS CARBON
MONOXIDE, A POISONOUS,
ODORLESS AND INVISIBLE GAS.
BREATHING THIS GAS CAN
CAUSE SERIOUS INJURY, ILL-
NESS & POSSIBLE DEATH.
WARNING RISK OF
EXPLOSION OR FIRE!
ALWAYS STORE FUEL AWAY
FROM THE WASHER WHILE THE
UNIT IS RUNNING OR HOT.
DANGER RISK OF FIRE!
-DO NOT SMOKE WHILE FUEL-
ING!
-DO NOT FILL THE FUEL TANK
WHILE UNIT IS RUNNING OR
HOT. ALLOW UNIT & ENGINE
TO COOL FOR TWO MINUTES
BEFORE REFUELING.
-DO NOT FILL FUEL TANK TO
POINT OF OVERFLOWING. AL-
LOW APPROXIMATELY 1/4” OF
TANK SPACE FOR FUEL EXPAN-
SION.
ENGINE FUEL TANK:
1. Review “Fire & Ventilation Precautions” before fueling.
2. Locate the Safety Decals on your unit and heed their warnings.
3. A minimum of 86 octane fuel is recommended for use with this unit. DO
NOT MIX OIL WITH GASOLINE.
4. Purchase fuel in quantities that may be used within 30 days. Use of clean,
fresh lead free gasoline is recommended. Leaded gasoline may be used
if lead-free is unavailable. DO NOT use gasoline containing methanol or
alcohol.
5. Check the engine oil level before starting the engine. (See engine manual.)
6. Fill the fuel tank according to accompanying engine manual instructions.
7. Occasional carburetor and choke adjustments will be necessary for the
engine. Refer to the engine manual supplied with this unit for proper
adjustment procedures.
8. Review the engine manual accompanying this pressure washer for correct
engine start-up and maintenance procedures.

WP-Cold Water Direct Driven Operator’s Manual 11
INSTALLATION & PREPARATION
NOZZLE REVIEW:
Various nozzles may be quick-connected into the end of the wand to
change the spray pattern or use the detergent feature. When using Quick
Connects (Q.C.), be certain the connection is securely locked. If not, the
high pressure water may shoot the nozzle from the wand, causing severe
injury or serious damage. To determine spray fan, refer to the actual num-
ber stamped on the nozzle. The rst two digits indicate the spray fan in
degrees, i.e.; 15=15°, 25=25°, 65=detergent/low pressure.
1. The 15° nozzle (YELLOW): This is a chiseling nozzle. The spray should
be directed at a 45° angle to the surface and used like a scraper to remove
paint, grease and dirt. Uses: Surface preparation (removing mildew stains
and paint chips).
2. The 25° nozzle (GREEN): This is a ushing nozzle. This pattern is best
suited for ushing dirt, mud, and grime. Uses: Wet sweeping leaves from
walks, curbs and driveways, cleaning stable oors, washing swimming
pool bottoms, degreasing engines.
3. The 65° nozzle (BLACK): This is a low pressure detergent application
nozzle. This broad spray pattern distributes solution over vast areas under
low pressure. Uses: Detergent application, misting or rinsing.
QUICK-CONNECT (Q.C.)
WARNING RISK OF INJECTION
CAUSING SEVERE INJURY!
NEVER LOOK DIRECTLY AT THE
NOZZLE ORIFICE UNLESS IT IS
DISCONNECTED FROM THE
GUN/WAND ASSEMBLY!
CONNECTION OF Q.C. NOZZLES
NOZZLE CONNECTION:
1. Be certain the trigger gun is locked in the “OFF” position. See WARNING,
right.
2. The nozzle assembly should be disconnected from the gun/wand assembly
at this time by retracting the locking ring on the quick-connect tting to
remove the nozzle.
QUICK-CONNECT FITTING
WARNING RISK OF SEVERE
INJURY!
THE TRIGGER GUN SHOULD
ALWAYS BE LOCKED IN THE
OFF POSITION WHEN NOT IN
USE!

12 WP-Cold Water Direct Driven Operator’s Manual
WATER SUPPLY:
1. Selectawatersupply hosewhichisa qualitygradeof gardenhosemeasuring
at least 3/4” ID and no longer than 50 feet.
2 Checkthewater inlet strainertoensureitis cleanandfree ofanyobstructions.
Periodic cleaning of the water strainer will help prevent pump problems.
As a strainer becomes obstructed, it restricts proper ow of water to the
pump. This can result in cavitations which will cause premature failure of
pump packings.
a. Using a screw driver, remove the screen from the water inlet.
b. Clean or replace with Mi-T-M® #19-0001 if necessary.
3. Connect the hoses.
a. Connect one end of the water supply hose to the water inlet of the unit.
b. Connect the other end of the hose to your pressurized water supply.
NOTE: Do not use a non-pressurized water supply (i.e. from a pond or
well) with this unit.
c. Connect the high pressure discharge hose to the water outlet of the
unit.
d. Securely connect the other end of the hose to the gun assembly. (A
wrench may be required on some models.)
e. Connect the wand assembly to the gun/hose assembly.
4. Follow the incoming water requirements listed below:
a. Water pressure must be a minimum of 25 pounds per square inch (PSI)
and a maximum of 125 PSI. (A typical outdoor faucet will generally
supply this PSI if turned completely “ON”.)
b. Incoming GPM must be approximately one gallon more than the
outgoing GPM stated on the pressure washer nameplate. (You can
check GPM by timing how long it takes to ll a 5 gallon container.)
c. Incoming water temperature must not exceed 125°F. Excessive pump
damage may result if the water temperature exceeds this acceptable
level.
5. Never allow the unit to operate without the incoming water line attached
and the water supply completely turned on.
CHECK WATER INLET STRAINER
INSTALLATION & PREPARATION
UNLOADER:
Note: The unloader will either be adjustable or factory preset de-
pending on the model you purchased.
ADJUSTABLE:
The unloader valve on your machine is equipped with an adjustment knob
to adjust the pressure. Should less pressure be required, simply turn the ad-
justment knob counterclockwise. To set back to maximum, turn adjustment
knob completely clockwise. DO NOT OVER TIGHTEN!
FACTORY PRESET:
The unloader valve on your machine is factory preset and should only be
adjusted by a trained Mi-T-M Representative. DO NOT adjust the pressure on
your own!
CAUTION RISK OF UNIT
DAMAGE!
DO NOT OVERTIGHTEN THE UN-
LOADER. BREAKAGE COULD
RESULT IN IMMEDIATE LOSS
OF WATER PRESSURE AND
COSTLY REPAIRS.
Adjustable Factory Preset

WP-Cold Water Direct Driven Operator’s Manual 13
WARNING
THE FOLLOWING PAGES CONTAIN OPERATING AND MAINTENANCE INSTRUCTIONS.
DO NOT ATTEMPT TO OPERATE THIS PRESSUREWASHER UNTIL YOU HAVE READ AND
UNDERSTOOD ALL SAFETY PRECAUTIONS AND INSTRUCTIONS LISTED IN THIS MANUAL.
INCORRECT OPERATION OF THIS UNIT CAN CAUSE SERIOUS INJURY!!
DO NOT ALTER OR MODIFY THIS EQUIPMENT IN ANY MANNER!
THERMAL RELIEF VALVE:
To ensure the water temperature does not exceed acceptable levels, never al-
low the pressure washer to operate in the bypass mode (with the unit running
and the trigger gun closed) for more than three minutes.
A “thermal relief valve” has been added to this unit to protect the pump. It
may begin to open and release water if the water temperature in the pump
has exceeded 140°F. This will allow fresh, cool water to enter the system.
PRE-START INSPECTION PROCEDURES:
Before starting the unit, perform the following procedures:
1. Check the oil level in the pump and engine.
2. Inspect the water inlet strainer. Clean or replace if necessary. See “Water
Supply”.
3. Check all hose connections to ensure they are securely tightened. See
“Water Supply”.
4. Inspect for system fuel leaks. If a fuel leak is found, DO NOT START UNIT!
See “Fire & Ventilation Precautions”. Be sure that all damaged parts are
replacedand that themechanicalproblemsarecorrectedpriortooperation
of the unit. If you require service, contact Customer Service.
5. Inspect high pressure hoses for kinking, cuts and leaks. If a cut or leak
is found, DO NOT USE HOSE! Replace hose before starting unit. See
“Miscellaneous Safety Precautions”. Be sure that all damaged parts are
replacedand that themechanicalproblemsarecorrectedpriortooperation
of the unit. If you require service, contact Customer Service.
INSTALLATION & PREPARATION

14 WP-Cold Water Direct Driven Operator’s Manual
PRIMING THE PUMP:
1. It is essential to prime the pump on initial start-up and each time the water
supply is disconnected from the unit after initial use.
2. Lay the high pressure hose out to remove any loops. Water ow will constrict
the hose, creating tight loops if the hose is not straight.
NOTE: The nozzle assembly should NOT be connected to the gun as-
sembly at this time. See “Nozzle Connection” .
3. With the trigger gun locked in the “OFF” position, turn the water supply
completely on. Pointing the gun in a safe direction, unlock the trigger gun
and squeeze the trigger.
4. Low pressure water will begin owing from the hose/gun assembly. This
allows the unit to prime and purge any air from the system. The unit is
primed when water ow is uninterrupted by air.
5. Once the unit is primed, release the trigger and lock the gun in the “OFF”
position. Securely connect the nozzle assy. (See “Nozzle Connection”)
DANGER RISK OF
INJECTION CAUSING
SEVERE INJURY!
-KEEP CLEAR OF NOZZLE!
NEVER PLACE HAND OR FIN-
GERS IN FRONT OF NOZZLE!
-DO NOT DIRECT DISCHARGE
STREAM AT PEOPLE OR PETS!
-BE CERTAIN THE NOZZLE IS
SECURELY CONNECTED TO
THE WAND TO PREVENT ACCI-
DENTAL DISCHARGE!
START-UP:
1. Refer to the “Safety Precautions” before starting the unit.
2. Locate the Safety Decals on your unit and heed their warnings.
3. With the gun locked in the “OFF” position, point the trigger gun away from
yourself or anyone else. Ensure the water supply is completely turned on.
4. Disengage the safety lock-off on the gun and squeeze the trigger. Low
pressure water will begin owing from the nozzle.
5. BE CERTAIN the trigger gun remains in an open position while starting the
engine. Brace yourself as the gun will kickback from the high pressure
created by the pump once the engine has started.
6. Steady the unit during engine start-up. (Refer to the engine manual
accompanying this pressure washer for the correct procedures needed to
start the engine.)
7. Once the engine has started, perform the following procedures with the
gun open:
a. Inspect for system oil leaks and fuel leaks. If a fuel leak is found,
TURN UNIT OFF IMMEDIATELY! See “Fire & Ventilation Precautions”.
Be sure that all damaged parts are replaced and that the mechanical
problems are corrected prior to operation of the unit. If you require
service, contact Customer Service.
b. Inspect high pressure hoses for kinking, cuts and leaks. If a cut
or leak is found, DO NOT TOUCH HOSE AT LEAK!!! TURN UNIT
OFF IMMEDIATELY! Replace hose before restarting the unit. See
“Miscellaneous Safety Precautions”. Be sure that all damaged parts
are replaced and that the mechanical problems are corrected prior to
operation of the unit. If you require service, contact Customer Service.
8. Trigger the gun several times. Be certain to LOCK the trigger gun in the
“OFF” position whenever changing the quick connect nozzles. NEVER
look directly into the nozzle! High pressure water creates a risk of severe
injury!
9. Do not allow unit to operate in bypass mode (with trigger closed) for more
than three minutes without triggering the gun. Failure to follow this simple
rule can cause premature failure of pump packing seals, resulting in costly
pump repair.
10. Because your pressure washer delivers a high pressure spray and a variety
of spray patterns, there are many cleaning jobs that can be done without
the use of detergents. If a cleaning agent is required, see “Cleaning With
Detergents” for the correct procedures.
CAUTION RISK OF
DAMAGE.
DO NOT ALLOW SPRAY PAT-
TERN TO REMAIN ON A FIXED
AREA FOR AN EXTENDED
PERIOD OF TIME. POSSIBLE
DAMAGE MAY OCCUR TO THE
AREA.
CAUTION RISK OF UNIT
DAMAGE.
BE CERTAIN THE NOZZLE IS
NOT CONNECTED TO THE UNIT
WHILE PRIMING THE PUMP.
PRIMING ALLOWS MINERAL
DEPOSITS TO BE RELEASED
FROM THE SYSTEM WHICH
WOULD OBSTRUCT OR DAM-
AGE THE NOZZLE ASSEMBLY
RESULTING IN COSTLY RE-
PAIRS.
OPERATING INSTRUCTIONS

WP-Cold Water Direct Driven Operator’s Manual 15
CLEANING WITH DETERGENTS:
1. Referto“DetergentCleaning Precautions”beforeworkingwithdetergents.
Be certain to wear protective safety attire as stated.
2. Prepare detergent solution according to label directions. Never pump
acids, alkaline, abrasive uids or solvents through the unit.
3. Some units are equipped with adjustable detergent knobs. Locate the
clear vinyl hose which leads to the pump head.
a. If your injector is equipped with an adjustment knob on the pump
head, you may adjust the amount of detergent desired by turning the
knob completely counterclockwise to set at the maximum siphon
rate.
b. If your injector is not equipped with an adjustment knob, the
detergent ratio is preset and cannot be adjusted.
4. Immerse the detergent strainer into the detergent solution to allow
detergent to siphon.
5. Withthetriggergun locked in the“OFF”position, securelyquick-connect
the detergent spray nozzle (#6540° BLACK) into the end of the wand.
NOTE: This injection system is designed to apply detergents under
low pressure only. It will not allow detergent solutions to be intro-
duced into the system unless the nozzle assembly is in the low
pressure detergent mode.
6. To apply solution; unlock the trigger gun and squeeze the trigger. In a
few moments a detergent/water mixture will exit the low pressure nozzle.
Start spraying the lower portion of the surface being cleaned and move
up, using long overlapping strokes. Applying from the bottom up helps
avoid streaking. Allow to soak briey. DO NOT allow detergent solution
to dry on the surface. (Avoid working on hot surfaces or in direct sunlight
to minimize the chances of the detergent drying, which may result in
damaging painted surfaces.) Be certain to rinse a small section at a
time.
7. To rinse; lock the trigger gun in the “OFF” position, securely quick-
connect the desired high pressure nozzle into the end of the wand.
Unlock the trigger gun and spray. It will take about 30 seconds to purge
all detergent from the line. For best rinsing results, start at the top and
work down.
8. Siphon a gallon of water through the low pressure detergent injection
system after each use. This prevents the possibility of corrosion or
detergent residue causing mechanical problems during the next use.
QUICK CONNECT DETERGENT
SHUTDOWN:
1. Turn engine “OFF” as directed in the engine manual.
2. Turn the water supply “OFF”.
3. Pointing the gun in a safe direction, trigger gun momentarily to relieve
any trapped pressure.
4. Once pressure is relieved, disconnect the nozzle assembly.
5. Disconnect and drain gun, wand and hoses.
6. Wipe unit clean and store with gun, wand and hoses in a safe, non-
freezing area.
OPERATING INSTRUCTIONS

16 WP-Cold Water Direct Driven Operator’s Manual
ENGINE: The engine instructions that accompany your unit detail specic
procedures for maintenance of the engine. Following the engine manufac-
turer’s recommendations will extend engine work life.
PUMP: The pump oil must be changed after the rst 25 hours of operation
on all units excluding the WP-2000. (The WP-2000 has a sealed crankcase
and the oil cannot be changed.) Once the initial oil change has been com-
pleted, it is recommended the oil be changed every 3 months or 250 hour
intervals. If oil appears dirty or milky, changes may be required at a greater
frequency. Add pump oil and ll only to the center of the sight glass (Refer
to the parts listing for the correct pump oil). DO NOT OVERFILL!
NOZZLES: Water ow through the spray nozzle will erode the orice, mak-
ing it larger, resulting in a pressure loss. Nozzles should be replaced when-
ever pressure is less than 85% of the maximum. The frequency of replace-
ment will depend upon such variables as mineral content in the water and
number of hours the nozzle is used.
QUICK COUPLERS: There is an o-ring seal inside the female quick coupler.
This o-ring will deteriorate or, if the unit is allowed to pump without the high
pressure hose or nozzle attached, the o-ring may be blown out occasionally.
Simply insert a replacement o-ring to correct the leak. (Additional o-rings
can be purchased from your dealer.)
STORAGE & MAINTENANCE

WP-Cold Water Direct Driven Operator’s Manual 17
STORAGE & MAINTENANCE
WARNING RISK OF UNIT
BURSTING!
DO NOT STORE/OPERATE UNIT
IN A FREEZING ENVIRONMENT!
WINTERIZING:
For storage and transportation purposes in subfreezing ambient tempera-
tures, it will be necessary to winterize this unit. This unit must be protected
to the lowest incurred temperature for the following reasons:
1. If any part of the pumping system becomes frozen; excessive pressure
may build up in the unit which could cause the unit to burst resulting in
possible serious injury to the operator or bystanders.
2. The pumping system in this unit may be permanently damaged if frozen.
FREEZE DAMAGE IS NOT COVERED BY WARRANTY.
If you must store your unit in an area where the temperature may fall below
32°F, you can protect your unit by following the procedure outlined below.
1. Gather the following items:
a. Two 5 gallon containers.
b. One gallon of antifreeze. (Work Pro® recommends an environmentally
safe antifreeze.)
c. Water supply.
d. Three foot hose, 1/2-3/4 I.D. with a 3/4 inch male garden hose tting.
2. Procedure:
a. To start winterizing, unit must be run and primed according to the
“Start-up Procedures” listed on page 14.
b. After running and priming, shut off the unit and water supply.
c. Relieve system pressure by pointing the trigger gun in a safe direction
and squeezing the trigger until water ow ceases to exit the nozzle.
d. Lock the trigger gun in an OFF position and remove the nozzle.
e. In one 5 gallon container, mix the antifreeze and water according to
manufacturer’s recommendations for the temperature to which you are
winterizing.
NOTE: Proper winterizing is based on the recommended manufacturer’s
instructions listed on the “Protection Chart” shown on the back label
of most antifreeze containers.
f. Remove the water supply hose from the unit and attach the 3 foot
hose securely to the inlet connection. Submerge the other end into
the antifreeze solution.
g. Shut off the detergent injector if applicable.
h. Point the wand into the empty container and start the unit.
i. Trigger the gun until the antifreeze begins to exit the wand. Release
the trigger for 3 seconds, then trigger the gun for 3 seconds. Continue
cycling the gun several times until all the antifreeze mixture is siphoned
from the container.
j. Stop the unit.
k. Detach the 3 foot hose from the unit and drain any excess antifreeze
back into the 5 gallon container.
l. Disconnect the hose/gun/wand assembly from the unit and drain any
excess antifreeze back into the 5 gallon container.
m. Store the hose, gun and wand with the unit in a safe, non-freezing area.
n. Store antifreeze solution for next use or dispose of according to state
EPA laws.
3. Optional Procedure:
a. Shut the unit and water supply off.
b. Relieve system pressure by pointing the trigger gun in a safe direction
and squeezing the trigger until water ow ceases to exit the nozzle.
c. Disconnect and drain the hose, gun and wand.
d. Start the unit and allow it to run until all the water exits the unit. Once
the water has stopped owing from the unit, turn the unit off.
NOTE: When using this procedure, caution should be used as ice chips
can form from drops of water which could cause the unit to burst if
starting before completely thawed.
32˚F 0˚C

18 WP-Cold Water Direct Driven Operator’s Manual
TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE REMEDY
Engine will not start. Various engine problems. Refer to the engine manual
accompanying your unit.
Unit components are frozen. Allow to thaw. If any part of the unit
becomes frozen; excessive pres
sure may build up in the unit which
could cause the unit to burst
resulting in possible serious injury
to the operator or bystanders.
No discharge at nozzle when Inadequate water supply. Ensure hose is 3/4” diameter and
trigger mechanism is squeezed. incoming water supply is turned on.
Kink in water inlet hose. Remove kink.
Low or uctuating pressure. Kink in high pressure discharge hose. Replace hose.
Water inlet screen obstructed. Remove screen, clean or replace.
Pump sucking air. (Prime eliminated) Tighten all water intake connections
Eliminate leaks in intake line.
Not in high pressure mode. Insert a high pressure nozzle.
Obstructed or worn spray nozzle. Remove, clean or replace.
Damaged or obstructed valve assy. Remove, inspect, clean or replace.
on pump.
Pump packings worn. Replace packings.
Bypass valve not operating correctly. Repair or replace.
Water is leaking from the “Heat Water temperature is too high. Do not allow the unit to operate in
Dump Valve” the bypass mode (with trigger gun
closed) for more than 3 minutes.
Defective valve. Replace.
Oil appears milky or foamy. Water in oil. Change pump oil. Fill to proper
level. (Excluding WP-2000)
Oil leaking from unit. DO NOT USE!!!!! Contact Work Pro Customer
Service.
Detergent will not siphon into Detergent strainer is not completely Check, submerge if necessary.
Low Pressure Detergent mode. submerged in detergent solution.
Detergent strainer obstructed. Inspect, clean or replace.
Detergent hose cut, obstructed or Inspect, clean or replace.
kinked.
Detergent adjusting knob on pump Open adjusting knob. Refer to
turned to closed position. (If applicable.)“Cleaning with Detergents” pg. 15
Not in low pressure mode. Insert 6540° (BLACK) nozzle.
Nozzle assembly is plugged. Clean or replace.
Too many high pressure hose Use one extension maximum.
extensions attached to the water outlet.
Ball & Spring in Venturi stuck. Remove, clean or replace.
Water ows back into detergent Ball & Spring in Venturi reversed, Remove, clean or replace.
container. missing or corroded.
Water ows from the nozzle when the Gun is malfunctioning. Repair or replace.
trigger gun is locked in the “OFF”
position.

WP-Cold Water Direct Driven Operator’s Manual 19
STATEMENT OF WARRANTY
The manufacturer warrants all parts, (except those referred to below), of your new pressure washer to be
free from defects in materials and workmanship during the following periods:
For One (1) Year from the date of original purchase:
High Pressure Pump Cart Assembly
GFCI Plumbing
For Ninety (90) days from the date of original purchase:
Trigger Gun/Wand High Pressure Hose
Unloader Valve On/Off Switch
Strainer/Filters
Defective parts not subject to normal wear and tear will be repaired or replaced at our option during the
warranty period. In any event, reimbursement is limited to the purchase price paid.
EXCLUSIONS
1. The Engine is covered under separate warranty by its respective manufacturer and is subject to the terms
set forth therein.
2. Normal wear parts:
Pump Packings Spray Nozzles
Pump Valves Detergent Valves
O-rings Quick Couplings/Screw Connects
3. This warranty does not cover parts damaged due to normal wear, misapplication, misuse, operation at
other than recommended speeds, pressures or temperature. Parts damaged or worn because of the use
of caustic liquids or by operation in abrasive or corrosive environments or under conditions causing pump
cavitation are not warranted. Failure to follow recommended operating and maintenance procedures
also voids warranty.
4. The use of other than Genuine Work Pro® Repair Parts will void warranty.
5. Warranty will be void if used in any application other than consumer/homeowner. Parts returned, prepaid
to our factory or to an Authorized Service Center will be inspected and replaced free of charge if found
to be defective and subject to warranty. There are no warranties which extend beyond the description
of the face hereof. Under no circumstances shall the manufacturer bear any responsibility for loss of use
of the unit, loss of time or rental, inconvenience, commercial loss or consequential damages.
For Service or Warranty Consideration, contact
563-556-7484 / 800-228-6172 / Fax [phone]
Monday-Friday 8:00 A.M. - 5:00 P.M.

20 WP-Cold Water Direct Driven Operator’s Manual
TABLA DE CONTENIDOS
INTRODUCCION...........................................................................................................21
ADVERTENCIAS IMPORTANTES DE SEGURIDAD .............................................. 22-25
PRECAUCIONES CONTRA INCENDIO Y DE VENTILACION ....................................................................22
PRECAUCIONES PARA ROCIADO ............................................................................................................23
PRECAUCIONES PARA LIMPIEZA CON DETERGENTES.........................................................................24
PRECAUCIONES MISCELANEAS DE SEGURIDAD ..................................................................................24
PRECAUCIONES DE AJUSTE....................................................................................................................25
ILUSTRACION DE LOS ELEMENTOS Y COMPONENTES ........................................26
CALCOMANIAS DE SEGURIDAD................................................................................27
INSTALACION Y PREPARACION........................................................................... 28-31
VESTIMENTA..............................................................................................................................................28
PREPARACION ..........................................................................................................................................28
TANQUE DE COMBUSTIBLE DEL MOTOR ...............................................................................................28
BOQUILLA AJUSTABLE.............................................................................................................................29
CONEXION DE LA BOQUILLA ...................................................................................................................29
SUMINISTRO DE AGUA.............................................................................................................................30
DESCARGADOR ........................................................................................................................................30
VALVULA DE DESCARGA TERMICO.........................................................................................................30
PROCEDIMIENTOS DE INSPECCION ANTES DEL ARRANQUE ..............................................................31
INSTRUCCIONES DE OPERACION....................................................................... 32-33
CEBADO DE LA BOMBA ...........................................................................................................................32
ARRANQUE................................................................................................................................................33
LIMPIEZA CON DETERGENTES................................................................................................................33
APAGADO ..................................................................................................................................................33
ALMACENAMIENTO Y MANTENIMIENTO ........................................................... 34-35
MANTENIMIENTO ESPECIFICO ................................................................................................................34
PREPARACION PARA EL INVIERNO .........................................................................................................35
LOCALIZACION DE FALLAS........................................................................................36
DECLARACION DE GARANTIA ...................................................................................37
ADVERTENCIA: Este producto puede
exponerlo a productos químicos, incluido el
plomo, que el Estado de California conoce a
causar cáncer y defectos congénitos u otros
daños reproductivos. Para obtener más
información, visite www.P65Warnings.ca.gov
ADVERTENCIA
ADVERTENCIA: Este producto puede expo-
nerle a químicos incluyendo carbon monoxide,
que es conocido por el Estado de California
como causante de defectos de nacimiento u
otros daños reproductivos. Para mayor
información, visite www.P65Warnings.ca.gov.
ADVERTENCIA