Karcher Pressure Washer HD 425 User Manual

HD 425  
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  
Max. Water Volume  
Voltage  
1150 PSI  
1.8 GPM  
120 V  
Amp Draw  
13 AMPS  
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)  
 
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.  
To 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.  
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 equipment-  
grounding 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.  
• 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.  
Extension Cords  
Use a sufficient gauge:  
Up to 25 ft = 12/3 AWG  
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.  
25 to 50 ft = 10/3 AWG  
3
Use only 3-wire extension cords that have 3-  
prong 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.  
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.  
• THISSYSTEMISCAPABLEOFPRODUCING  
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 RE-  
MOVAL 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.  
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.  
 
IMPORTANT PRECAUTIONS – continued  
Water Supply (Cold Water Only)  
• Never use the pressure washer to draw in  
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.  
• 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.  
• Always prevent debris from being drawn into  
the unit by using a clean water source and an  
accessory water filter if required.  
ASSEMBLY INSTRUCTIONS  
4
Step 1  
Step 2  
Step 3  
Attach the high pressure hose  
to the spray gun.  
Attach the wand to the  
spray gun.  
Attach the triple jet nozzle to  
the wand.  
 
OPERATING INSTRUCTIONS  
Step 2  
Step 1  
Connect water supply hose to unit’s water inlet.  
Connect the high pressure hose to the unit’s  
high pressure outlet.  
5
Step 3  
Step 4  
Plug the power cord into the power outlet.  
Unlock the lock of the trigger gun.  
Connect water supply hose to the cold water  
source and turn water on completely.  
Step 6  
Step 5  
Turn on the pressure washer (ON).  
NOTE: This unit is equipped with a  
pressure switch. The motor only starts up  
when the trigger on the gun is pulled.  
The motor shuts off when the trigger is  
released.  
Trigger the gun to eliminate trapped air, wait  
for a steady flow of water to emerge from the  
spray nozzle.  
 
USING THE ACCESSORIES  
Triple Jet Nozzle  
The triple jet nozzle must be positioned to one  
of the two settings for high pressure cleaning  
by turning the nozzle tip.  
The pencil jet spray(0°) should be used for  
stubborn dirt.  
Warning  
TO AVOID SERIOUS INJURY, NEVER  
POINT SPRAY NOZZLE AT YOURSELF,  
OTHER PERSONS OR ANIMALS.  
The High pressure flat spray (25°) should be  
used for cleaning over a large surface area.  
The third setting on the triple nozzle is used for  
the application of detergents.  
High pressure pencil jet cleaning.  
6
High pressure fan jet cleaning.  
Low pressure Detergent application  
“CHEM” position.  
 
WORKING WITH DETERGENTS  
The high pressure setting is used for cleaning, you cannot apply detergents when working at high  
pressure. To apply detergents you must be operating at low pressure (“CHEM” position).  
Always Use Kärcher  
Detergents for Best Results.  
Kärcher biodegradable detergents are specially  
formulated to protect the environment and your  
pressure washer. Special formula won’t clog the  
suction tube filter and will protect the internal  
parts of the pressure washer for a longer life.  
Step 1  
For Kärcher Detergents, check with your dealer  
or call:  
Use triple nozzle, set to “CHEM” position, to  
apply detergents  
1-888-705-9444  
The following detergents are  
available from your Kärcher dealer:  
Premium Vehicle Wash  
Heavy Duty Degreaser  
Universal Detergent  
7
Step 2  
Adjust the filter end of the detergent tube for  
light (-), or maximum (+) detergent coverage.  
Place the filter end of detergent suction tube  
into the jug.  
Caution  
Never use:  
• Bleach, chlorine products and other  
corrosive chemicals  
• Liquids containing solvents  
(i.e., paint thinners, gasoline, oils)  
• Tri-sodium phosphate products  
• Ammonia products  
Step 3  
Turn on the pressure washer. Pull trigger to  
operate unit: Liquid detergent is drawn into the  
unit and mixed with water. Apply detergent to  
work area, from bottom to top. Do not allow  
detergent to dry on surface.  
• Acid-based products  
These chemicals will harm the unit and will  
damage the surface being cleaned.  
 
SHUTTING DOWN & CLEAN-UP  
Step 1  
Step 2  
Step 3  
Step 4  
Remove detergent  
suction tube from jug  
and insert into 1 gallon and unplug cord  
Turn the switch to  
off (OFF) position  
Turn off the water  
source.  
Press trigger to  
release water  
pressure.  
(5 L) of fresh water.  
from outlet.  
Siphon water at low  
pressure for one minute.  
8
Step 5  
Step 6  
Disconnect the garden hose  
from the water inlet on the unit.  
Disconnect the high pressure hose from the high  
pressure outlet and engage the gun safety lock.  
TAKING A BREAK... five minutes or more  
Step 1  
Step 2  
Engage gun  
safety lock.  
Turn pressure  
washer to off  
(OFF) position.  
WINTERIZING AND LONG-TERM STORAGE  
4. Store the machine and accessories in  
a room which does not reach freezing  
temperatures. DO NOT store near  
furnance or other sources of heat as it  
may dry out the pump seals.  
1. Disconnect all water connections.  
2. Turn on the machine for a few seconds,  
until the water which had remained in  
the pump exits. Turn off immediately.  
3. Do not allow high pressure hose to  
become kinked.  
Caution: Failure to follow the above  
directions will result in damage to the  
pump assembly and accessories.  
 
9
OPTIONAL CLEANING  
Optional cleaning accessories are available to further enhance your cleaning capabilities:  
• Rotating Wash Brush  
• .033 Dirt Blaster Attachment  
• Extension Wands  
• Sandblasting Attachment  
• Water Filter  
• Extension Hoses  
• Pipe Drain Cleaner  
KÄRCHER 1 YEAR WARRANTY  
Kärcher Canada Inc. warrants to the original owner that this product shall be free from defects in  
material and workmanship for one year from the date of its original purchase. If such a defect  
appears during the warranty period, upon presentation of proof of purchase, Kärcher Canada Inc.  
will repair or replace (at its option) your product without charge.  
This warranty does not cover accidental damage, unreasonable use, normal wear and tear, loss of  
use or other consequential damages, nor does it cover repairs made or attempted by unauthorized  
persons.  
Wear items such as nozzle, hose, spray wands and other accessories are warranted for 3 months.  
Please note that no returns will be accepted without prior authorization from our customer  
service department.  
It is the owner’s responsibility to file claims for damage caused by public transportation carriers  
directly with the carrier concerned.  
 
TROUBLESHOOTING  
Disconnect the machine from the power source before making any repair.  
Cause  
Solution  
On/Off switch is in the “OFF”  
position.  
Turn switch to the “ON”  
position.  
Power cord is not plugged in.  
Extension cord is too long.  
Plug in power cord.  
Replace extension cord with  
Extension cord is not proper gauge. either a 25 ft. 12/2 gauge cord  
Extension cord is damaged.  
or a 50 ft. 10/2 gauge cord.  
Try a different outlet.  
Electrical outlet does not supply  
adequate power.  
Diameter of garden hose is too  
small.  
Replace with a 1/2 inch or 5/8  
inch garden hose.  
Water supply is restricted.  
Check garden hose for kinks,  
leaks and blockage.  
Not enough inlet water supply.  
Water inlet filter is clogged.  
Open water source full force.  
Remove filter and rinse out in  
warm water.  
10  
Triple nozzle is in low pressure  
position.  
Turn triple nozzle to high pressure  
position.  
Not enough inlet water supply.  
Turn water on full force. Check  
garden hose for kinks, leaks or  
blockage.  
Pump is sucking air.  
Check that hoses and fittings are  
air tight. Turn off machine and  
purge pump by squeezing trigger  
gun until a steady flow of water  
emerges through the nozzle.  
Water inlet filter is clogged.  
Remove filter and rinse out in  
warm water.  
Discharge nozzle is obstructed.  
Blow out or remove debris with a  
fine needle.  
Calcified gun, hose or power  
nozzle.  
Run distilled vinegar through  
detergent tank.  
 
TROUBLESHOOTING – continued  
Symptom  
Cause  
Solution  
No detergent.  
Detergent is too thick.  
Dilute detergent.  
Filter on detergent suction tube is  
clogged.  
Run warm water through filter to  
remove debris.  
Damaged or clogged detergent  
suction tube.  
Remove obstruction or replace  
detergent suction tube.  
Triple nozzle is in high pressure  
position.  
Turn nozzle tip to low pressure  
position.  
Discharge nozzle is obstructed.  
Blow out or remove debris with a  
fine needle.  
Garden hose  
Loose fittings.  
Tighten fittings.  
connection leaks.  
Missing/worn rubber washer.  
Insert new washer.  
Spray wand leaks.  
Spray wand not properly attached. Slide the spray wand into the  
trigger gun. Turn the wand collar  
clockwise onto the gun threads  
until thight.  
11  
Broken o-ring or plastic insert.  
Pump is sucking air.  
Call Customer Service.  
Pump is noisy.  
Check that hoses and fittings are  
air tight. Turn off machine and  
purge pump by squeezing trigger  
gun until a steady flow of water  
emerges through the nozzle.  
Water leaks from pump (up Loose fittings.  
Check that all fittings are tight.  
to 10 drops per minute is  
permissible).  
Water seals are damaged or worn. Call Customer Service.  
Oil seals are damaged or worn.  
Call Customer Service.  
Oil Drip.  
If you encounter any additional difficulties not listed, please call your dealer or  
Customer Service at 1-888-705-9444 for help, or visit www.karcher.ca  
 

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