Irwindale TWC78-K6 User manual

Owner’s Manual
Instructions for Assembly, Testing, Operation, Servicing, and Storage.
Portable Gas Pressure Washer:
For Outdoor Use Only!
Irwindale Industrial Pressure Washer TWC78-K6 Owner’s
Manual

Welcome
Thank you for your purchase of this quality Irwindale Industrial product. We wish you years
of success using your new pressure washer. This machine is designed to clean dirty
surfaces with high pressure cold water.
This manual contains general warnings about the inherent risks of operating pressure
washers and specific warnings about the operation and maintenance of this particular
pressure washer. In addition, it outlines important maintenance and storage procedures.
Please read it carefully before operating, maintaining, repairing, and storing your new
pressure washer. Keep this owner’s manual handy so you can refer to it at any time. This
owner’s manual is considered a permanent part of the pressure washer and should remain
with the pressure washer if resold.
The information and specifications included in this publication were in effect at the time of
approval for printing. IES reserves the right, however, to discontinue or change
specifications or design at any time without notice and without incurring any obligation
whatsoever. No part of this publication may be reproduced without written permission.
Thank you for your business.
WARNING:
READ and UNDERSTAND the Owner’s Manual completely before using this
pressure washer.
Assemble, test and use only in accordance with the Owner’s Manual instructions.
WEAR personal protective gear when filling, using, cleaning, and servicing the
pressure washer.
DO NOT START the pressure washer until you have read, understood, and
followed the instructions in this manual. Improper use of the pressure washer
could result in serious injury or illness to the operator or nearby persons/animals,
and cause property damage.

2
Quick Facts About Your Pressure Washer
Inspect Upon Delivery: FIRST! Inspect for missing or damaged components. See “Initial
Set-Up” section of this manual for information on where to report missing or damaged parts.
Add Engine Oil: Engine is shipped without oil. See engine manual for instructions on
capacity and viscosity recommendations as well as instructions and safety precautions for
adding/changing engine oil.
Replace Temporary Shipping Pump Oil Plug: The pump is shipped with oil but with a
temporary shipping plug to prevent leakage during shipping. Check pump oil level before
starting, oil level should be half-way up the sight glass to the level pointed to by the
indicator. Remove the RED shipping oil cap and install the BLACK permanent crankcase
vent cap plug that is contained in the plastic bag containing this Owner’s Manual ( on select
units only).
Water Flow Requirements: Make sure your supply water flow rate is 20% higher than the
pressure washer’s flow rate (see “Operation” section for detail), and that your water is clean
and particle free.
Chemical Spraying: Use only approved pressure washer chemicals designed for high-
pressure use.
Storage: Do not allow water to freeze in the pump, hose, or spray gun(s). See “Storage”
section for more information.
Maintenance Schedule: Engine and pump require periodic inspection and servicing to
keep pressure washer functioning efficiently. See “Maintenance Schedule” section for
frequency of servicing.
Any Questions Contact Customer Service
Consult an Authorized Service Dealer regarding maintenance or repair procedures.
Please contact us with service-related questions regarding operating and assembling your
new pressure washer, including parts you may be missing.
Customer support: 1-888-980-4938
[email protected]
www.IrwindaleIND.com

3
Retain for your records
Record your pressure washer’s model number and serial number as well as the date you
purchased the pressure washer below.
Retain this information for your records. You’ll need to refer to this information when
ordering parts and contacting customer service about maintaining your pressure washer
and its warranty.
Model number:
_________________________________________
Serial number:
__________________________________________
Date purchased:
________Month _____________Day _____________Year
TWC34-K6 Nameplate

4
Contents
Welcome .................................................................................................................................................. 1
Quick Facts About Your Pressure Washer............................................................................................... 2
Any Questions Contact Customer Service.......................................................................................... 2
Important safety precautions.................................................................................................................... 6
Pressure washer Safety........................................................................................................................... 7
Safety Label Locations............................................................................................................................. 9
Safety and Operation Labels:................................................................................................................. 10
Detailed Safety warnings........................................................................................................................ 11
Carbon Monoxide WARNINGS.............................................................................................................. 11
Injection Injury WARNINGS ................................................................................................................... 12
Electrical Shock WARNINGS................................................................................................................. 12
About your pressure washer .................................................................................................................. 13
Reference manual contains critical information...................................................................................... 13
What’s in the Box? ................................................................................................................................. 13
Pressure washer Major Components and Controls Diagram................................................................. 14
Engine Major Components and Controls Diagram................................................................................. 15
Engine Controls...................................................................................................................................... 16
Initial Set-Up........................................................................................................................................... 17
Step 1, Inspect and Unpack................................................................................................................... 17
Step 2, Assembly ................................................................................................................................... 18
Step 3, Select Suitable Location ............................................................................................................ 20
Pre-operation check and Safety Rules................................................................................................... 22
Are you ready to get started?................................................................................................................. 22
Is your Pressure washer read to go? ..................................................................................................... 26
Fuel Requirements................................................................................................................................. 28
Always follow these general safety rules when fueling: ......................................................................... 29
Fill Engine Fuel Tank.............................................................................................................................. 30
Inspect Fuel System/Check for Leaks.................................................................................................... 30
Inspect Spray System ............................................................................................................................ 31
Perform Scheduled Maintenance, As Needed....................................................................................... 31
Connect Hoses, Water Supply, Spray Gun, and Spray Nozzle.............................................................. 31
Operation................................................................................................................................................ 36
Pressure washer Placement .................................................................................................................. 36
Start-Up Procedures............................................................................................................................... 36
Starting Engine. (See the engine owner’s manual for more details.) .................................................... 37

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Applying Cleaning Chemical (If Desired)................................................................................................ 38
High Pressure Spraying ......................................................................................................................... 39
Shutdown Procedures............................................................................................................................ 40
Maintenance........................................................................................................................................... 40
Importance of maintenance.................................................................................................................... 40
Maintenance safety precautions............................................................................................................. 41
Pressure washer Maintenance Schedule............................................................................................... 42
Detailed Instructions – Maintenance & Repair....................................................................................... 43
Engine Maintenance............................................................................................................................... 45
Pump Maintenance ................................................................................................................................ 45
Inspect Fuel System............................................................................................................................... 45
Inspect & Clean Spark Arrestor (If equipped)......................................................................................... 46
Keep Pressure Washer Clean................................................................................................................ 46
Storing and transporting your pressure washer ..................................................................................... 47
Between-Use Storage............................................................................................................................ 47
Long Term Storage Preparation:............................................................................................................ 48
Preparing Pressure Washer for Freezing Conditions............................................................................. 48
Troubleshooting...................................................................................................................................... 49
Pressure washer assembly and parts list:.............................................................................................. 52
Pump assembly and parts list: ............................................................................................................... 53
Engine assembly and parts list:.............................................................................................................. 53
Contact information for Technical and Customer Assistance................................................................. 53
Locate an Authorized Service Dealer..................................................................................................... 53
Registration Card ................................................................................................................................... 54
Customer assistance.............................................................................................................................. 54
Limited Warranty.................................................................................................................................... 55

6
Important safety precautions
This manual contains critical safety information. Please read the entire manual closely.
Because safety is paramount and using a pressure washer carries significant
responsibilities, we have outlined warnings and the general hazards of operating pressure
washers. In addition, we have summarized the recommended procedures for operating,
repairing, maintaining, and storing your specific pressure washer to keep you and others
safe.
It would be impossible for us to warn you of each risk and all of the hazards involved in the
use of pressure washers. Therefore, it’s essential that you use your best judgment and
take precautions when using, maintaining, repairing, and storing your pressure washer.
There are many safety warnings in this manual and on the pressure washer itself to guide
you:
Pressure washer safety labels: The safety labels on your pressure washer warn of
potential danger. It’s critical that you read them. If any labels become difficult to read or
have been removed, contact your dealer for a replacement label.
Manual safety messages: This manual contains specific instructions and severe warnings
about the ramifications of using poor judgment and not following the instructions outlined in
this manual. The ramifications range from serious injury and losing consciousness to
death. These messages are preceded by a safety alert symbol and one of three signal
words, DANGER, WARNING, or CAUTION.
These signal words mean:

Manual headings and sections: We’ve devoted several sections of this manual to outline
the risks, hazards, and warnings when using, repairing, maintaining, and storing your
pressure washer.
Not following instructions or using poor judgment when using
and maintaining your pressure washer can cause you or
someone else to be KILLED or SERIOUSLY INJURED.
DANGER
WARNING
CAUTION
You WILL be KILLED or SERIOUSLY HURT if you don’t follow
instructions
You CAN be KILLED or SERIOUSLY HURT if you don’t follow
instructions
You CAN be HURT if you don’t follow instructions

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Instructions: how to use this Pressure washer correctly and safely.
Pay attention to cautions such as, “Carbon monoxide WARNINGS” or “Burn and fire
WARNINGS.”
Pressure washer Safety
WARNING: SPECIAL HAZARDS
CO Poisoning: Exhaust from engine contains carbon monoxide, a poisonous gas that can
cause carbon monoxide poisoning and possible death if inhaled.
Injection Injury: High pressure water can pierce skin and underlying tissue, leading to
serious injury and possible amputation. Such an injection injury can result in blood
poisoning and/or severe tissue damage.
Flying Debris: High-pressure water can cause flying debris and possible surface damage.
Electric Shock: Operating equipment in wet conditions or near water can cause electric
shock.
Chemical Exposure: Cleaning chemical vapors or contact with skin may be hazardous.
Fire/Explosion: Engine sparking can ignite fuel or other flammable liquids or vapors in the
vicinity. Hot exhaust from engine can ignite combustible materials.
Burns: Pressure washer pump and engine are hot surfaces that can cause burn injuries.
* Detailed safety information about these hazards appears throughout this manual.
Important Safety Information
Irwindale Industrial pressure washers are designed to provide high pressure cold water
spray. Cleaning chemicals may be incorporated into the low pressure spray if desired. The
pressure pump for this equipment is powered by a gasoline internal combustions engine.
Special precautions are necessary when using this equipment in order to safely operate this
pressure washer. It is the user responsibility to read and understand this entire manual and
to operate this pressure washer in a safe manner.
Note: Do not use for other purposes, as unforeseen hazards or equipment damage may
result.
Most injuries or property damage can be prevented if you follow all instructions in this
manual and on the pressure washer. The most common hazards are discussed below,
along with the best way to protect yourself and others.

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Operators Responsibility
It is the operator’s responsibility to provide the necessary safeguards to protect people and
property. Know how to stop the pressure washer quickly in case of emergency. If you leave
the pressure washer for any reason, always turn the engine off. Understand the use of all
controls and connections.
Adult Control ONLY: Only trained adults should set up and operate the pressure washer.
Be sure that anyone who operates the pressure washer receives proper instruction. Do not
let children operate the pressure washer. Keep children and pets away from the area of
operation.
Personal Protection: Wear safety apparel during operation, including safety glasses with
side and top protection. Ear protection is also recommended if working near any operating
engine.
Under the influence: Never operate, or let anyone else operate, the pressure washer while
fatigued or under the influence of alcohol, drugs, or medication.
* Keep this manual for reference and review.
Pressure washer Operation
This pressure washer is intended for outdoor use only.
This pressure washer is powered by a gasoline engine and therefore can only be operated
outdoors.
This pressure washer will require you to supply and install the following fluids and
equipment:
Pump oil (as specified)
Gasoline (as specified)
Engine Oil (as specified)
Personal Protection Equipment
* See “Specifications” section of this manual for more details.
Refuel With Care
Gasoline is extremely flammable, and gasoline vapor can explode. Refuel outdoors, in a
well-ventilated area, with the engine stopped and the pressure washer on a level surface.
Do not fill the fuel tank above the fuel strainer shoulder. Never smoke near gasoline, and
keep other flames and sparks away. Always store gasoline in an approved container.
Make sure that any spilled fuel has been wiped up before starting the engine.
Hot Exhaust
The muffler becomes very hot during operation and remains hot for a while after stopping
the engine. Be careful not to touch the muffler while it is hot. Let the engine cool down
before transporting the pressure washer or storing it indoors.

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To prevent fire hazards, keep the pressure washer at least 7 feet (2 meter) away from
building walls and other equipment during operation. Do not place flammable objects close
to the engine.
Carbon Monoxide Hazard
Exhaust contains poisonous carbon monoxide, a colorless and odorless gas. Breathing
carbon monoxide can cause loss of consciousness and may lead to death.
If you run the pressure washer in an area that is confined, or even partly enclosed, the air
you breathe could contain a dangerous amount of exhaust gas.
Never run the engine inside a closed garage, house, or confined area.
Safety Label Locations
NOTICE:
ATTENTION: Rental Companies and Private Owners who loan this
equipment to others!
 All persons to whom you rent/loan this pressure washer must have access to and read
this manual. Keep this owner’s manual with the pressure washer at all times and
advise all persons who will operate the machine to read and understand it. You must
also provide personal instruction on how to safely set-up and operate the pressure
washer and remain available to answer any questions a renter/borrower might have.
Owner’s manuals are available from Irwindale Industrial Customer Support at 1-888-
980-4938 or [email protected]
On Product Warning Labels
Part Number Description
201386 Fuel Explosion Hazard
20137 Burn Hazard
201388 Operational Warnings
201385 Explosion/CO2 Warning
201387 Operation Instructions
E15 E15 Warning