Karcher HD 425 User Manual

High Pressure Washer Operator Manual

Overview ........................................................................2

Precautions................................................................ 2-4

Assembly Instructions ...................................................4

Operating Instructions...................................................5

Using the Accessories...................................................6

Working with Detergents ...............................................7

Shut Down and Clean-Up ............................................. 8

Taking a Break ............................................................... 8

Winterizing and Long-Term Storage ............................. 8

Optional Cleaning Accessories ................................... 9

Troubleshooting ................................................... 11-12

Specifications

Max. Pressure 1150 PSI
Max. Water Volume 1.8 GPM
Voltage 120 V
Amp Draw 13 AMPS

HD 425

Please keep the original box, packaging and receipt.
Before operating this unit, please read this manual
thoroughly and retain it for future reference.

5.960-859 (2005435-04-03)

OVERVIEW High Pressure Washer

2

Machine includes

1 Handle
2 Power cord
3 Detergent filter and suction tube
4 High pressure outlet
5 Trigger gun with safety lock

6 Spray wand
7 Triple jet nozzle
8 High pressure hose
9 Water inlet (not pictured)

10 On/Off switch

NEVER!

Never point nozzle at people or animals.
Never drink alcohol or use drugs while operating this equipment.
Never operate while standing in water.
Never touch plug with wet hands.
Never let electrical connections rest in water.
Never operate pressure washer without the water turned on.
Never use hot water.

THE BEST ANTI-FREEZE PROTECTION IS PROVIDED BY
USING AND STORING THE MACHINE IN SHELTERED SPACE.

IMPORTANT PRECAUTIONS – Read First!

Safety Warnings

When using this product basic precautions
should always be followed:

• Read all the instructions before using the
product.

• High pressure jets can be dangerous if subject
to misuse. The jet must not be directed at
persons, animals, electrical devices, or the
machine itself.

• T o reduce the risk of injury , do not operate the
machine near children.

• Learn how to stop the machine and release
pressure quickly. Be thoroughly familiar with
the controls.

• Stay alert — watch what you are doing.

• Wear safety goggles.

• Do not use acids, solvents, or any other
flammable material in this product. These
products can cause physical injuries to the
operator and irreversible damage to the
machine.

• Do not operate the product when fatigued or
under the influence of alcohol or drugs.

• Do not stand on unstable surfaces. Stand with
both feet balanced at all times.

• To reduce the risk of electrocution, keep all
connections dry and off the ground. Do not
touch plug with wet hands.

• The Trigger Gun Safety Lock PREVENTS the
trigger from accidentally being engaged. This
safety feature DOES NOT lock trigger in the
on position.

WARNING

• DO NOT USE WITH FLAMMABLE LIQUIDS
AND TOXIC CHEMICALS.

• INJECTION HAZARD: EQUIPMENT CAN
CAUSE SERIOUS INJURY IF THE SPRAY
PENETRATES THE SKIN. DO NOT POINT
THE GUN AT ANYONE OR ANY PART OF
THE BODY. IN CASE OF PENETRATION
SEEK MEDICAL AID IMMEDIATELY.

• THIS SYSTEM IS CAPABLE OF PRODUCING
1150 PSI. TO AVOID RUPTURE AND
INJURY, DO NOT OPERATE THIS PUMP
WITH COMPONENTS RATED LESS THAN
1150 PSI WORKING PRESSURE
(INCLUDING BUT NOT LIMITED TO SPRAY
GUNS, HOSE AND HOSE CONNECTIONS).

• BEFORE SERVICING, CLEANING OR RE­MOVAL OF ANY PARTS, SHUT OFF POWER
AND RELIEVE PRESSURE.

• DO NOT SPRAY ELECTRICAL APPARATUS
AND WIRING.

• IF CONNECTION IS MADE TO A POTABLE
WATER SYSTEM, THE SYSTEM SHALL BE
PROTECTED AGAINST BACKFLOW.

GROUNDING INSTRUCTIONS

This product must be grounded. If it should
malfunction or breakdown, grounding provides
a path of least resistance for electric current to
reduce the risk of electric shock. This product
is equipped with a cord having an equipment­grounding conductor and a grounding plug. The
plug must be plugged into an appropriate outlet
that is properly installed and grounded in
accordance with all local codes and ordinances.

DANGER – Improper connection of the
equipment-grounding conductor can result in
a risk of electrocution. Check with a qualified
electrician or service personnel if you are in
doubt as to whether the outlet is properly
grounded. Do not modify the plug provided with
the product – If it will not fit the outlet, have a
proper outlet installed by a qualified electrician.
Do not use any type of adaptor with this product.

Extension Cords

Use a sufficient gauge:

Up to 25 ft = 12/3 AWG

25 to 50 ft = 10/3 AWG
Use only 3-wire extension cords that have 3­prong grounding-type plugs and 3-pole cord
connectors that accept the plug from the
product. Use only extension cords that are
intended for outdoor use. These extension
cords are identified by a marking “Acceptable
for use with outdoor appliances; store indoors
while not in use.” Use only extension cords
having an electrical rating not less than the
rating of the product. Do not use damaged
extension cords. Examine extension cord before
using and replace if damaged. Do not abuse
extension cord and do not yank on any cord to
disconnect. Keep cord away from heat and
sharp edges. Always disconnect the extension
cord from the receptacle before disconnecting
the product from the extension cord.

Caution

• Follow the maintenance instructions
specified in the manual.

• This machine has been designed for use
with cleaning detergent supplied
or recommended by the manufacturer.
The use of other cleaning detergents may
affect the operation of the machine and
void the warranty.

3

IMPORTANT PRECAUTIONS – continued

Water Supply (Cold W ater Only)

• Water hose must be at least a 1/2 inch or
5/8 inch in diameter.

• Flow rate of water supply must not fall
below 2 GPM (gallons per minute).

• Flow rate can be determined by running the
water for one minute into an empty 5-gallon
container.

• The water supply temperature must not
exceed 104°F/40°C.

• Never use the pressure washer to draw in

• Always prevent debris from being drawn into

ASSEMBLY INSTRUCTIONS

4

water contaminated with solvents, e.g.
paint thinners, gasoline, oil, etc.

NOTE: Dirt in the feed water will
damage the unit. To avoid this risk,
we recommend fitting a water filter.

the unit by using a clean water source and an
accessory water filter if required.

Step 1

Attach the high pressure hose
to the spray gun.

Step 2

Attach the wand to the
spray gun.

Step 3

Attach the triple jet nozzle to
the wand.