Detergents And General Washing Techniques; Cleaning Tips - Landa MHP4 30324E Operator's Manual

Operations
Detergents And General Washing
Techniques
WARNING: Some detergents may
WARNING
be harmful if inhaled or ingested,
causing severe nausea, 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
damage the pump. Prepare detergent solution as
required by the manufacturer. 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).
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
minutes.
12
Detergent
Injector
High
Pressure
Hose
STEP 3: Open wand control
valve for low pressure allowing
detergent to siphon. Close
control valve for rinsing at high
pressure.
Landa MHP Operator's Manual 8.913-925.0 - T
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
detergent 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 sweeping motion keeping the spray nozzle
approximately 1 foot from cleaning surface. Use over-
lapping 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.