HOT SERIES PRESSURE WASHER
OPERATOR’S MANUAL
9
LANDA HOT • 96-626 • REV. 2/04
PREVENTATIVE MAINTENANCE
1. Check to see that water pump is properly lubricated.
2. Follow Winterizing Procedures to prevent freeze dam-
age to pump and coils.
3. Always neutralize and flush detergent from system
after use.
4. If water is known to be high in mineral content, use a
water softener on your water system, or de-scale as
needed.
5. Do not allow acidic, caustic or abrasive fluids to be
pumped through system.
6. Always use high grade quality Landa cleaning prod-
ucts.
7. Never run pump dry for extended periods of time.
8. Use clean fuel-kerosene, No. 1 fuel oil, or diesel. Re-
place fuel filter every 100 hours of operation. Avoid
water contaminated fuel as it will seize up the fuel
pump. Desoot coils monthly or use an additive if die-
sel is being used.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, not letting water reach
maximum operating temperature (see Burner Ad-
justments).
10. Never allow water to be sprayed on or near the mo-
tor, the burner assembly or any electrical component.
11. Periodically delime coils per instructions.
12. Check to see that the motor is properly lubricated.
It is advisable, periodically, to visually inspect the burner.
Check air inlet to make sure it is not clogged or blocked.
Wipe off any oil spills and keep this equipment clean
and dry.
The areas around the Landa washer should be kept clean
and free of combustible materials, gasoline and other
flammable vapors and liquids.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
MAINTENANCE AND SERVICE
Unloader Valves
Unloader valves trap pressure in the line when a spray
gun is closed. Unloader valves are preset and tested at
the factory before shipping. Occasional adjustment of the
unloader may be necessary to maintain correct pressure.
Winterizing Procedure
Damage due to freezing is not covered by warranty. Ad-
here to the following cold weather procedures whenever
the washer must be stored or operated outdoors under
freezing conditions.
During winter months, when temperatures drop below 32°F,
protecting your machine against freezing is necessary.
Store the machine in a heated room. If this is not pos-
sible then mix a 50/50 solution of antifreeze and water
into a 5 gallon bucket. Place a short section of garden
hose into the bucket and connect it to the machine. El-
evate the bucket and turn the pump on to siphon the
antifreeze through the machine. If compressed air is avail-
able, screw an air fitting into the inlet connector. By in-
jecting compressed air, all water will be blown out of the
system.
High Limit Hot Water Thermostat
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature, the high limit
control will turn the burner off until the water cools.
Pumps
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should be
checked through use of dipstick found on top of pump.
Oil should be maintained at that level.
Cleaning of Coils
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best preventa-
tive for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of Landa Deliming Powder (Landa
Part #9-028008) will remove lime and other deposits be-
fore coil becomes plugged. (See Deliming Instructions
for use of Landa Deliming Powder.)
Deliming Coils
Periodic flushing of coils or optional float tank is recom-
mended.
Step 1 Fill a container or float tank with 4 gallons of
water, then add 1 lb. of deliming powder. Mix
thoroughly.
Step 2 Remove wand assembly from spray gun and put
spray gun into container or optional float tank.
Secure trigger on spray gun into the open posi-
tion.
Step 3 Attach a short section (3-5 ft.) of garden hose to
machine to siphon solution from an elevated con-
tainer. Turn machine on, allowing solution to be
pumped through coils back into the container.
Solution should be allowed to circulate 2-4 hours.
Step 4 After circulating solution flush entire system with
fresh water. Reinstall high pressure nozzle into
wand.
