8
TNT SERIES PRESSUREWASHER OPERATOR’S MANUAL
PREVENTATIVE MAINTENANCE
1. Checkto seethatwater pumpis properly lubricated.
2. Followwinterizinginstructionstopreventfreezedam-
age to pump and coils.
3. Always neutralize and flush detergent from system
after use.
4. If waterisknown tobe highinmineral content,use a
watersoftener onyourwater system,or de-scaleas
needed.
5. Do not allow acidic, caustic or abrasive fluids to be
pumped through system.
6. Always use high grade quality cleaning products.
7. Never run pump dry for extended periods of time.
8. Use clean fuel-kerosene, No. 1 fuel oil, or diesel.
Cleanor replacefuel filterevery100 hoursof opera-
tion.Avoidwater contaminatedfuel asitwill damage
the fuel pump.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, not letting water reach
maximumoperatingtemperature.
10. Never allowwatertobesprayedonornear theengine
or burner assembly or any electrical component.
11. Periodically delime coils as per instructions.
12. Check to see that engine 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 equipment clean and dry.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
Thearea aroundtheLanda washershould bekeptclean
and free of combustible materials, gasoline and other
flammable vapors and liquids.
MAINTENANCE AND SERVICE
Unloader Valves:
Unloader valves are preset and tested at the factory be-
foreshipping.Occasional adjustmentoftheunloadermay
be necessary to maintain correct pressure.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.Ad-
hereto thefollowingcold weatherprocedures 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 nec-
essary.Store the machine in a heated room.If this is not
possible then mix a 50/50 solution of anti-freeze and
water in the float tank.Turn the engine on to siphon the
anti-freeze mixture through the machine.If compressed
airis available,anair fitting canbe screwed intothe float
tank by removing the float tank strainer and fitting.Then
inject the compressed air.Water will be blown out of the
machine when the trigger on the spray gun is opened.
High Limit Hot WaterThermostat:
For safety, each machine is equipped with a tempera-
ture sensitive high limit control switch. In the event that
the water should exceed its operating temperature, the
high limit control will turn the burner off until the water
coolsthen automaticallyreset itself.Thethermostatsen-
sor is located on the discharge side of the heating coil.
Thethermostatcontroldial islocatedon thecontrol panel.
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use.Thereafter, change oil every
threemonths orat 500hour intervals.Oil levelshould be
checked through use of dipstick found on top of pump,
or the red dot visible through the oil gauge window. Oil
should be maintained at that level.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the heating coil.This growth is increased
bytheextremeheat buildup inthe coil.Thebest preven-
tativeforliming conditionsis touse highquality cleaning
detergents.In areas where alkaline water is an extreme
problem,periodicuse ofLandaDelimingPowder(C-Tech
Part #9-028008) will remove lime and other deposits
beforecoil becomesplugged.(See Deliminginstructions
for use of Landa Deliming Powder.)
Deliming Coils:
Periodicflushing ofcoilsoroptional floattankisrecommended.
Step 1 Fill a container with 4 gallons of water, then add
1 lb.of deliming powder.Mix thoroughly. Pour
mixture into float tank.
Step 2 Removewandassemblyfromspraygun andput
spray gun into float tank.Secure the trigger on
the spray gun into the open position.
Step 3 Turn engine on, allowing solution to be pumped
through coils back into the float tank.The solu-
tion should be allowed to circulate 2-4 hours or
until the color changes.
Step 4 After circulating solution, flush the entire sys-
tem with fresh water.Clean out float tank and
then reinstall wand assembly to spray gun.
Removal of Soot and Heating Coil:
In the heating process, fuel residue in the form of soot
depositsmaydevelop betweenthe heatingcoil pipeand
block air flow which will affect burner combustion.When
soot has been detected on visual observation, the soot
on the coil must be washed off after following the coil
removal steps (See Coil Removal on page 9).
