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Detergents & Cleaning Techniques; Cleaning Tips - Kärcher HD 3.0/30 Pb Operator's Manual

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WARNING: Some detergents
may be harmful if inhaled or
ingested, causing severe nau-
sea, fainting or poisoning. The
harmful elements may cause
property damage or severe
STEP 1: Connect detergent injector to discharge
nipple on machine. Connect high pressure hose to
injector with quick coupler. (Check to make sure lock-
ing couplers are in proper position before applying
water pressure).
STEP 2: Use detergent designed
specifically for pressure wash-
ers. Household detergents could
damage the pump. Prepare de-
tergent solution as required by the
manufacturer. Fill a container with
pressure washer detergent. Place
the fi lter end of detergent suction
tube into the detergent container.
STEP 3: With safety latch on spray
gun engaged, secure black detergent nozzle into quick
NOTE: Detergent cannot be applied using red, yellow,
green or white nozzles.
STEP 4: With the engine run-
ning, pull trigger to operate ma-
chine. Liquid detergent is drawn
into the machine and mixed with
water. Apply detergent to work
area. Do not allow detergent to
dry on surface.
IMPORTANT: You must fl ush the detergent injection
system after each use by placing the suction tube
into a bucket of clean water, then run the pressure
washer in low pressure for 1-2 minutes.
If you run the engine on your pressure washer for 1-2
minutes without pressing the trigger on the spray gun,
circulating water in the pump can reach high tempera-
tures. When the water reaches this temperature, the
pump protector engages and cools the pump by dis-
charging the warm water onto the ground. This thermal
device prevents internal damage to the pump.
Pre-rinse cleaning surface with fresh water. Place de-
tergent suction tube directly into cleaning solution and
apply to surface at low pressure (for best results, limit
your work area to sections approximately 6 feet square
and always apply detergent from bottom to top). Allow
detergent to remain on surface 1-3 minutes. Do not al-
low detergent to dry on surface. If surface appears to
be drying, simply wet down surface with fresh water.
If needed, use brush to remove stubborn dirt. Rinse at
high pressure from top to bottom in an even sweeping
motion keeping the spray nozzle approximately 1 foot
from cleaning surface. Use overlapping strokes as you
clean and rinse any surface. For best surface cleaning
action spray at a slight angle.
High Pressure
• Before cleaning any surface, an inconspicuous
• If painted surfaces are peeling or chipping, use
• Keep the spray nozzle a safe distance from the
• Bleach, chlorine and other corrosive chemicals
• Liquids containing solvents (i.e., paint thinner,
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the machine and will dam-
age the surface being cleaned.
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun. Remove black soap
nozzle from the quick coupler. Select and install the
desired high pressure nozzle. NOTE: You can also stop
detergent from fl owing by simply removing detergent
siphon tube from bottle.
9.807-623.0 • Rev. 10/15


area should be cleaned to test spray pattern and
distance for maximum cleaning results.
extreme caution as pressure washer may remove
the loose paint from the surface.
surface you plan to clean. High pressure wash a
small area, then check the surface for damage. If
no damage is found, continue to pressure wash-
CAUTION - Never use:
gasoline, oils)


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This manual is also suitable for:

Hd 3.7/35 pbHd 3.0/40 pb