Detergents & General Washing Techniques; Cleaning Tips - Landa MHP4-3000 Operator's Manual

DeTeRgeNTS aND geNeRal WaSHINg TeCHNIqUeS
WARNING: Some detergents
WARNING
may be harmful if inhaled or
ingested, causing severe nau-
sea, fainting or poisoning. The
harmful elements may cause
property damage or severe
injury.
STeP 1: Use detergent designed
specifically for pressure washers.
Household detergents could dam-
age the pump. Prepare detergent
solution as required by the manu-
facturer. Fill a container with
pressure washer detergent. Place
the filter end of detergent suction
tube into the detergent container.
Discharge
Nipple
Detergent
Valve
89139250-6
STeP 2: Connect detergent injector to discharge
nipple on machine. Connect high pressure hose to
injector with quick coupler (check to make sure locking
coupler sleeves are in proper position before applying
water pressure).
STeP 3: Open wand control
valve for low pressure allow-
ing detergent to siphon. Close
control valve for rinsing at
high pressure.
OPTION: Open detergent valve located on control
panel. The detergent valve controls detergent flow
by the number of turns of this valve. Close detergent
valve to rinse.
IMPORTANT: You must flush the detergent after
each use by placing the suction tube into a bucket
of clean water, follow step 3 or open detergent
valves then run the pressure washer for 1-2 min-
utes.
Detergent
Injector
High
Pressure
Hose
LANDA MHP • 8.913-925.0 • Rev. 8/13
THeRMal PUMP
PROTeCTION
If you run your pressure washer for 3-5 minutes without
pressing the trigger on the spray gun, circulating water
in the pump can reach high temperatures. When the
water reaches this temperature, the pump protector
engages and cools the pump by discharging the warm
water onto the ground. This thermal device prevents
internal damage to the pump.

CleaNINg TIPS

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
allow 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 sweep-
ing 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.
Recommendations:
• Before cleaning any surface, an inconspicuous
area should be cleaned to test spray pattern and
distance for maximum cleaning results.
• If painted surfaces are peeling or chipping,
use extreme caution as pressure washer may
remove the loose paint from the surface.
• Keep the spray nozzle a safe distance from the
surface you plan to clean. High pressure wash
a small area, check the surface for damage
and if no damage is found, continue pressure
washing.
CAUTION - Never use:
• Bleach, chlorine products and other corrosive
chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the machine and will
damage the surface being cleaned.
RINSINg
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun and close detergent
valve. Select and install the desired high pressure
nozzle.
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