Landa SLT6-32624E User manual

OPERATOR’S MANUAL
For technical assistance or the dealer nearest you,
consult our web page at www.landa.com
SLT/SLX
KUBOTA DIESEL ENGINE
9.807-540.0
 SLT6-32624E 1.110-065.0  SLT8-32824E 1.110-066.0
 SLX10-32624E 1.110-067.0
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY— STOREINDOORS
Assembledin USA
UseApprovedDetergent Only.
Containscomponents from one or more of the
followingcountries:
UnitedStates,China,Italy, Japan and Thailand.
8.932-968.0
98075400-1
EXPOSED PULLEYS A ND
BELTSCAN C AUSE INJURY
KEEPCLEAR WHILE MACHINERY
ISOPERATING
POLEAS YCORREAS EXPUE STAS
PUEDEN CAUSAR DAÑO
NOSE ACERQUE SI MÀQUINA ESTÁ FUNCIONANDO
DES COURROIES OUPOULIES EXPOSÉES
PEUVENT CAUSER DESBLESSURE S
NEPAS S’APPROCHER LORSQUE L’APPAREILEST EN OPÉRATION
WARNING
PRECAUCIÓN/ AVERTISSEMENT
8.932-965.0

Identification of Operational Label Symbols
Hour Meter
Temperature
When the light is on, it means the engine is overheating.
Turn machine off and perform maintenance.
Glow Plug
When the light is on, the engine is being pre-heated.
When the light turns off, the engine can be started.
Low Oil
When the light is on, it means check the oil level.
Add oil if needed.
Battery is Not Charging
When the light is on, it means check battery and/or
charging system.
Burner Switch
Pump Switch
Detergent
Steam Combination
Voltage
When the light is on, it means the power supply is on
Not all machines have all symbols
SYMBOLS

3
Model Number ______________________________
Serial Number ______________________________
Date of Purchase ____________________________
The model and serial numbers will be found on a decal attached
to the pressure washer.You should record both serial number and
date of purchase and keep in a safe place for future reference.
CONTENTS
Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
Introduction & General Safety Information 4-6
Component Identification 7
Assembly Instructions 8
Operating Instructions 9
Detergents & General Washing Techniques 10
Shut Down & Clean-Up 11
Storage 11
Troubleshooting 12-16
Maintenance, Service, & Preventative Maintenance Schedule 17-21
Warranty

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
4
INTRODUCTION & IMPORTANT SAFETY INFORMATION
Thank you for purchasing this Pressure Washer.
We reserve the right to make changes at any time
without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of
the manufacturer’s operating instructions and warnings
before using this pressure washer. Warning information
should be emphasized and understood. If the operator
is not fluent in English, the manufacturer’s instructions
and warnings shall be read to and discussed with
the operator in the operator’s native language by the
purchaser/owner, making sure that the operator com-
prehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’ instructions.
The operator must know how to stop the machine
quickly and understand the operation of all controls.
Never permit anyone to operate the engine without
proper instructions.
SAVE THESE INSTRUCTIONS
This manual should be considered a permanent
part of the machine and should remain with it if
machine is resold.
When ordering parts, please specify model and
serial number. Use only identical replacement parts.
This machine is to be used only by trained operators.
IMPORTANT SAFETY
INFORMATION
WARNING:To reduce the risk of
injury, read operating instruc-
tions carefully before using.
1. Read the owner's manual
thoroughly. Failure to follow
instructions could cause mal-
function of the machine and
result in death, serious bodily
injury and/or property damage.
2. Know how to stop the machine and bleed pressure
quickly. Be thoroughly familiar with the controls.
3. Stay alert — watch what you are doing.
WARNING
KEEP WATER
SPRAY AWAY FROM
ELECTRICAL WIRING.
WARNING: Keep wand, hose, and
water spray away from electric
wiring or fatal electric shock may
result.
4. All installations must comply
with local codes. Contact
your electrician, plumber,
utility company or the selling
distributor for specific details.
WARNING
EAR PROTECTION
MUST BE WORN
WARNING:This machine exceeds
85 db appropriate ear protection
must be worn.
WARNING
USE PROTECTIVE
EYE WEAR
AND CLOTHING
WHEN OPERATING
THIS EQUIPMENT.
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne
and fly at high speeds. To avoid
personal injury, eye, hand and
foot safety devices must be
worn.
5. Eye, hand, and foot pro-
tection must be worn when
using this equipment.
6. Keep operating area clear of all persons.
RISK OF EXPLOSION:
OPERATE ONLY WHERE
OPEN FLAME OR TORCH
IS PERMITTED
WARNING
WARNING: Flammable liquids
can create fumes which can ig-
nite, causing property damage
or severe injury.
WARNING: Risk of explosion —
Operate only where open flame
or torch is permitted.
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
WARNING
WARNING: Risk of fire — Do not
add fuel when the product is
operating or still hot.
WARNING: Do not use gasoline
crankcase draining or oil con-
taining gasoline, solvents or
alcohol. Doing so will result in
fire and/or explosion.
WARNING: Risk of fire — Do not
Spray flammable liquids.
7. Allow engine to cool for 1-2 minutes before refuel-
ing. If any fuel is spilled, make sure the area is dry
before testing the spark plug or starting the engine.
(Fire and/or explosion may occur if this is not done.)
Gasoline engines on mobile or portable equipment
shall be refueled:
a. outdoors;
b. with the engine on the equipment stopped;
c. with no source of ignition within 10 feet of
the dispensing point; and
d. with an allowance made for expansion of the
fuel should the equipment be exposed to a
higher ambient temperature.
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
5
PRESSURE WASHER OPERATOR’S MANUAL
15. Be certain all quick coupler fittings are secured
before using pressure washer.
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
WARNING
WARNING: High pressure devel-
oped by these machines will
cause personal injury or equip-
ment damage. Keep clear of
nozzle. Use caution when oper-
ating. Do not direct discharge
stream at people, or severe in-
jury or death will result.
WARNING
PROTECT FROM
FREEZING
WARNING: Protect machine from
freezing.
16. To keep machine in best
operating conditions, it is
important you protect machine
from freezing.Failure to protect
machine from freezing
could cause malfunction of the
machine and result in death,
serious bodily injury, and/or property damage. Fol-
low storage instructions specified in this manual.
17. Inlet water must be clean fresh water and no hotter
then 90°F.
WARNING
RISK OF
ASPHYXIATION. USE
THIS PRODUCT ONLY
IN A WELL
VENTILATED AREA.
WARNING: Risk of asphyxiation.
Use this product only in a well
ventilated area.
18. Avoid installing machines
in small areas or near ex-
haust fans. Adequate ox-
ygen is needed for com-
bustion or dangerous car-
bon monoxide will result.
19. Manufacturer will not be liable for any changes
made to our standard machines or any components
not purchased from us.
20. The best insurance against an accident is precau-
tion and knowledge of the machine.
WARNING
RISK OF INJURY
FROM FALLS WHEN
USING LADDER.
WARNING: Be extremely careful
when using a ladder, scaffolding
or any other relatively unstable
location. The cleaning area
should have adequate slopes
and drainage to reduce the pos-
sibility of a fall due to slippery
surfaces.
IMPORTANT SAFETY INFORMATION
In an overfilling situation, additional precautions are
necessary to ensure that the situation is handled
in a safe manner.
WARNING: Risk of injury. Disconnect battery
ground terminal before servicing.
8. When in use , do not place machine near flammable
objects as the engine is hot.
9. Oil burning appliances shall be installed only in
locations where combustible dusts and flammable
gases or vapors are not present. Do not store or
use gasoline near this machine.
10. Use No. 1 or No. 2 heating oil (ASTM D306) only.
NEVER use gasoline in your fuel oil tank. Gasoline
is more combustible than fuel oil and could result
in a serious explosion. NEVER use crankcase or
waste oil in your burner. Fuel unit malfunction could
result from contamination.
11. Do not confuse gasoline and fuel oil tanks. Keep
proper fuel in proper tank.
WARNING
RISK OF INJURY.
HOT SURFACES
CAN CAUSE BURNS
WARNING: Risk of injury. Hot
surfaces can cause burns. Use
only designated gripping areas
of spray gun and wand. Do not
place hands or feet on non-insu-
lated areas of the pressure
washer.
12. Transport/Repair with fuel tank EMPTY or with fuel
shut-off valve OFF.
HOT DISCHARGE FLUID:
DO NOT TOUCH OR
DIRECT DISCHARGE
STREAM AT PERSONS.
CAUTION: Hot discharge fluid.
Do not touch or direct discharge
stream at persons.
WARNING: This machine pro-
duces hot water and must have
insulated components attached
to protect the operator.
13. To reduce the risk of injury, close supervision is
necessary when a machine is used near children.
Do not allow children to operate the pressure
washer. This machine must be attended during
operation.
TRIGGER GUN KICKS
BACK - HOLD WITH
BOTH HANDS
WARNING
WARNING: Grip cleaning wand
securely with both hands before
starting. Failure to do this could
result in injury from a whipping
wand.
14. Never make adjustments on
machine while in operation.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
6
IMPORTANT SAFETY INFORMATION
21. Do not allow acids, caustic or abrasive fluids to pass
through the pump.
22. Never run pump dry or leave spray gun closed
longer than 1-2 minutes.
23. Machines with shut-off spray gun should not be
operated with the spray gun in the off position for
extensive periods of time as this may cause dam-
age to the pump.
24. Protect discharge hose from vehicle traffic and
sharp objects. Inspect condition of high pressure
hose before using or bodily injury may result.
25. Before disconnecting discharge hose from water
outlet, turn burner off and open spray gun to al-
low water to cool below 100° before stopping the
machine. Then open the spray gun to relieve pres-
sure. Failure to properly cool down or maintain the
heating coil may result in a steam explosion.
26. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
27. Do not operate this machine when fatigued or under
the influence of alcohol, prescription medications,
or drugs.
28. In oil burning models, use only kerosene, No. 1
home heating fuel, or diesel. If diesel is used, add
a soot remover to every tankful.
Follow the maintenance instructions speci-
fied in the manual.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
7
PRESSURE WASHER OPERATOR’S MANUAL
COMPONENT IDENTIFICATION
Pump — Delivers a specific gpm to the high pressure
nozzle which develops pressure.
Spray Gun — Controls the application of water and
detergent onto cleaning surface with trigger device.
Includes safety latch.
Detergent Valve — Allows you to siphon and mix
detergents.
Wand — Must be connected to the spray gun.
High Pressure Hose — Connect one end to water
pump high pressure discharge nipple and the other
end to spray gun.
Rupture Disk — Secondary pressure release in the
unlikely event the unloader valve fails.
Unloader Valve — Safety device which, when the
spray gun closes, prevents over pressurization.
Generator — Provides 110V power to the burner
assembly.
NOTE:If trigger on spray gun is released for more
than 2 minutes, water will leak from the pump
protector. Warm water will discharge from pump
protector onto floor. This system prevents internal
pump damage.
9.801-427.0
OFFGL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY— STOREINDOORS
Assembledin USA
UseApprovedDetergent Only.
Containscomponentsfrom one or more of the
followingcountries:
UnitedStates,China,Italy, Japan and Thailand.
8.932-968.0
98075400-2
EXPOSED PULLEYS A ND
BELTS CAN CAUSE INJURY
KEEPCLEAR WHILE MACHINERY
ISOPERATING
POLEAS YCORREASEX PUESTAS
PUEDEN CAUSAR DAÑO
NOSE ACERQUE SI MÀQUINA ESTÁ FUNCIONANDO
DES COURROIES OUPOULIES EXPO SÉES
PEUVENT CAUSER DES BLES SURES
NEPAS S’APPROCHER LORSQUE L’APPAREILEST EN OPÉRATION
WARNING
PRECAUCIÓN/ AVERTISSEMENT
8.932-965.0
Water Inlet
Wand
Generator
High
Pressure
Hose
Detergent
Valve
(Optional)
Steam Valve
(Optional)
Thermostat
Volt
Meter
High
Pressure
Nozzles
Spray
Gun
Pump
Rupture Disk Unloader
Valve

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
8
98075400-5
98075400-6
98075400-8
ASSEMBLY INSTRUCTIONS
STEP 1: Attach a 5/8" water supply
hose to inlet connector. Minimum
flow should be 10 GPM depending
on model of machine.
STEP 3: Attach variable pressure
control wand to spray gun using
teflon tape on threads to prevent
leakage.
STEP 7: Check oil level by using
supplied dip-stick. Use SAE 30W
non-detergent only.
STEP 2: Attach high pressure hose
to discharge nipple using quick cou-
pler. Lock coupler securely by pull-
ing back coupler collar, inserting
onto discharge nipple and pushing
collar forward until secure.
STEP 8: Fill fuel oil tank. Do not
confuse gasoline and fuel oil tanks.
Keep proper fuel in proper tank.
STEP 5: Before installing nozzle, turn
on water supply and run machine
allowing water to flush through the
system until clear. Pull the spring-
loaded collar of the wand coupler collar
back to insert your choice of pressure
nozzle. CAUTION: Never replace
nozzles without engaging the safety
latch on the spray gun trigger.
STEP 9: Install proper battery
making sure that the red cable is
attached to the positive terminal.
Use a 12V group 24 style battery.
98075400-3
Garden
Hose
Water
Inlet
98075400-4
High
Pressure
Hose
Discharge
Nipple Trigger
Gun
98075400-7
Pressure
Nozzle
98075400-9
Dipstick
98075400-10
Collar
Wand
Safety Latch
STEP 4: Attach the high pressure
hose to the spray gun using teflon
tape on hose threads.
High
Pressure
Hose
Spray Gun
STEP 6: Release the coupler collar
and push the nozzle until the collar
clicks. Pull the nozzle to make sure
it is seated properly.
Coupler
Collar
Pressure
Nozzle
Oil
Tank
Coupler
Collar
98075400-11

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
9
PRESSURE WASHER OPERATOR’S MANUAL
9.801-427.0
OFF GL
ST
DO NOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
98075400-16
9.801-427.0
OFF GL
ST
DO NOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Ser vice Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY — STORE INDOORS
Assembled in USA
UseApproved Detergent Only.
Containscomponents from one or more of the
followingcountries:
UnitedStates, China, Italy, Japan and Thailand.
8.932-968.0
98075400-17
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY — STOREINDOORS
Assembledin USA
UseApproved Detergent Only.
Containscomponents from one or more of the
followingcountries:
UnitedStates, China, Italy, Japan andThailand.
8.932-968.0
98075400-13
OPERATING INSTRUCTIONS
STEP 1: Read engine warning and
operating instructions prior to turn-
ing on the water. Check for water
leaks; tighten as needed.
STEP 2: Read engine manual pro-
vided. The keyed ignition is located
on the control panel. Simply turn key
to first position. Glow plug light will
illuminate.When light goes out, turn
key to start (second) position.
STEP 4: For hot water, turn the
thermostat knob to 210° then push
the burner switch to ON when a
steady stream of water flows out of
the spray gun. Burner will now light
automatically. NOTE: Do not start
machine with burner switch on.
STEP 3: With the spray nozzle
pointed away from you or anybody
else, press the trigger on the spray
gun to obtain pressurized cold water
spray.
STEP 5: For steam, open the
steam valve counterclockwise. This
lowers the pressure and raises the
temperature.
98075400-12
98075400-14
Engine
Key
Switch
STEP 6: The four color-coded quick connect nozzles
provide a wide array of spray widths from 0° to 45° and
are easily accessible when placed in the convenient
rubber nozzle holder, which is provided on the front of
the machine. NOTE: For a more gentle rinse, select the
white 40° or green 25° nozzle. To scour the surface,
select the yellow 15° or red 0° nozzle.
Nozzles
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY— STORE INDOORS
Assembledin USA
UseApproved Detergent Only.
Containscomponents from one or more of the
followingcountries:
UnitedStates, China, Italy, Japan and Thailand.
8.932-968.0
98075400-15
Burner
Switch
Detergent
Valve
(optional)
Steam
Valve
(optional)
Thermostat
Adjust Knob

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
10
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
injury.
STEP 1: Use detergent designed
specifically for pressure wash-
ers. Household detergents could
damage the pump. Prepare deter-
gent 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.
STEP 2: With the engine run-
ning, pull trigger to operate
machine. 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
flush the detergent after each use by placing the
suction tube into a bucket of clean water, open
detergent valves then run the pressure washer
for 1-2 minutes.
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.
98075400-20
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 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.
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, then check the surface for dam-
age. If no damage is found, continue to 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.
WARNING
DETERGENTS & GENERAL WASHING TECHNIQUES
98075400-18
Detergent Valve
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequippedwith optional generator
shouldnotexceed 1000 watts resistive
load.SeeService Manual for details.
CAUTION
ON
98075400-19
Detergent Tube

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
11
PRESSURE WASHER OPERATOR’S MANUAL
SHUT DOWN AND CLEAN-UP
CAUTION: Always store your pressure washer in a
location where the temperature will not fall below
32°F (0°C).The pump in this machine is susceptible
to permanent damage if frozen. FREEZE DAMAGE
IS NOT COVERED BY WARRANTY.
1. Stop the pressure washer, squeeze spray gun
trigger to release pressure.
2. Detach water supply hose and high pressure
hose.
3. Turn on the machine for a few seconds, until re-
maining water exits. Turn engine off immediately.
4. Drain the fuel and oil from the engine.
5. Do not allow high pressure hose to become
kinked.
6. Store the machine and accessories in a room which
does not reach freezing temperatures.
CAUTION: Failure to follow the above directions will
result in damage to your pressure washer.
When the pressure washer is not being operated or is
being stored for more than one month, follow these
instructions:
1. Replenish engine oil to upper level.
2. Drain diesel from fuel tank, fuel line, fuel valve and
carburetor.
3. Pour about one teaspoon of engine oil through the
spark plug hole, pull the starter grip several times
and replace the plug.Then pull the starter grip slow-
lyuntil you feel increased pressure which indicates
the piston is on its compression stroke and leave
it in that position. This closes both the intake and
exhaust valves to prevent rusting of cylinder.
4. Cover the pressure washer and store in a clean, dry
place that is well ventilated away from open flame
or sparks. NOTE: The use of a fuel additive, such
as STA-BIL®, or an equivalent, will minimize the
formulation of fuel deposits during shortage. Such
additives may be added to the gasoline in the fuel
tank of the engine, or to the gasoline in a storage
container.
After Extended Storage
CAUTION: Prior to restarting, thaw out any
possible ice from pressure washer hoses,
spray gun or wand.
Engine Maintenance
During the winter months, rare atmospheric conditions
may develop which will cause an icing condition in the
carburetor. If this develops, the engine may run rough,
lose power and may stall. This temporary condition can
be overcome by deflecting some of the hot air from the
engine over the carburetor area. NOTE: Refer to the
engine manufacturer's manual for service and mainte-
nance of the engine.
STORAGE
STEP 2: Turn burner switch off and
continue spraying, allowing the wa-
ter to cool to below 100°.
STEP 3: Turn engine key switch
off.
STEP 1: Remove detergent suction
tube from container and insert into
one gallon of fresh water. Open
detergent valve, pull trigger on
spray gun and siphon water for one
minute.
98075400-21
Burner
Switch
STEP 5: Squeeze trigger on spray
gun to relieve remaining pressure.
STEP 4: Turn off water supply.
Engine
Key
Switch
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
FOROUTDOOR USE ONLY— STORE INDOORS
Assembledin USA
UseApproved DetergentOnly.
Containscomponents from one or more of the
followingcountries:
UnitedStates, China,Italy, Japan and Thailand.
8.932-968.0
98075400-22
9.801-427.0
OFF GL
ST
DONOT OVERLOAD GENERATOR
Unitsequipped with optional generator
shouldnot exceed 1000 watts resistive
load.See Service Manual for details.
CAUTION
ON
TACH/HOUR
98075400-23
98075400-24 98075400-25

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
PRESSURE WASHER Troubleshooting Guide
12
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger supply hose; clean filter at water inlet.
Old, worn or incorrect spray
nozzle
Match nozzle number to machine and/or replace
with new nozzle.
Belt slippage Tighten or replace; use correct belt.
Plumbing or hose leak Check plumbing system for leaks. Re-tape leaks
with teflon tape.
Faulty or mis-adjusted
unloader valve
Adjust unloader for proper pressure. Install repair kit
when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet
or discharge valves in pump
Clean inlet and discharge valves.
Worn inlet or discharge valves Replace with valve kit.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve Rebuild or replace as needed.
Slow engine RPM Set engine speed at proper specifications.
Pump sucking air Check water supply and possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
BURNER WILL
NOT LIGHT
Little or no fuel Fill tank with fuel.
Improper fuel or water in fuel Drain fuel tank and fill with proper fuel.
Clogged fuel line Clean or replace.
Plugged fuel filter Replace as needed.
Mis-adjusted burner air bands Readjust air bands for clean burn.
Little or no fuel pressure from
fuel pump
Increase fuel pressure to specification and/or
replace fuel pump. Test with pressure gauge.
Faulty burner transformer Test transformer for proper arc between contacts.
Replace as needed.
(continued on
next page)
Disconnected or short in
electrical wiring
All wire contacts should be clean and tight.
No breaks in wire.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
13
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
Flex coupling slipping on fuel
pump shaft or burner motor shaft
Replace if needed.
On-Off switch defective Check for electrical current reaching
burner assembly with burner switch on.
Heavy sooting on coil and burner
can cause interruption of air flow
and shorting of electrodes
Clean as required.
Improper electrode setting Check and reset according to diagram in
Operator’s Manual.
Fuel not reaching combustion
chamber
Check fuel pump for proper flow. Check
solenoid flow switch on machines with spray
gun control, for proper on-off fuel flow control.
Clogged burner nozzle Clean as required.
Thermostat faulty or slow
engine speed
Increase engine RPM to increase voltage.
Flow switch malfunction Remove, test for continuity and replace as
needed.
Flow solenoid malfunction Replace if needed.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air Check water supply and air seepage at joints in
suction line.
Worn piston packing Check and replace if necessary.
Engine altitude The engine is preset for operation at altitudes
below 1000 feet above sea level. If operated at
higher altitudes, it may be necessary to contact
your local authorized engine sales and service
center for details.
MACHINE SMOKES
Improper fuel or water in fuel Drain tank and replace contaminated fuel.
Improper air adjustment Readjust air bands on burner assembly.
Low fuel pressure Adjust fuel pump pressure to specifications.
Plugged or dirty burner nozzle Replace nozzle.
Faulty burner nozzle spray pattern Replace nozzle.
Heavy accumulation of soot on
coils and burner assembly
Remove coils and burner assembly, clean
thoroughly.
Misaligned electrode setting Realign electrodes to specifications.
Obstruction in smoke stack Check for insulation blockage or other foreign
objects.
Low engine RPM Increase RPM.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
PRESSURE WASHER Troubleshooting Guide
14
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW WATER
TEMPERATURE
Improper fuel or water in fuel Replace with clean and proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump Check fuel pump pressure. Replace pump
if needed.
Fuel filter partially clogged Replace as needed.
Soot build-up on coils not
allowing heat transfer
Clean coils.
Improper burner nozzle Contact your local Landa Dealer.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine
warm or hot
Lower incoming water temperature.
Fuel pump pressure too high See specifications for proper fuel pressure.
Fuel pump defective Replace fuel pump.
Detergent line sucking air Tighten all clamps. Check detergent lines
for holes
Defective temperature switch Replace.
Incorrect fuel nozzle size Contact your local Landa Dealer.
Insufficient water supplied Check water G.P.M. to machine.
Restricted water flow Check nozzle for obstruction, proper size.
PUMP NOISY Air in suction line Check water supply and connections on
suction line.
Broken or weak inlet or
discharge valve springs
Check and replace if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
PRESENCE OF
WATER IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
WATER DRIPPING
FROM UNDER PUMP
Piston packing worn Check and replace if necessary.
O-Ring plunger retainer worn Check and replace if necessary.
Cracked piston Check and replace if necessary.
Pump protector Lower water supply pressure. Do not run
with spray gun closed longer than 2 minutes.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
15
PRESSURE WASHER OPERATOR’S MANUAL
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
OIL DRIPPING Oil seal worn Check and replace if necessary.
EXCESSIVE VIBRATION
IN DELIVERY LINE
Irregular functioning of the
valves
Check and replace if necessary.
DETERGENT
NOT DRAWING
Air leak Tighten all clamps. Check detergent lines for
holes.
Restrictor in float tank is
missing
Replace restricter. Check for proper orifice in
restrictor.
Filter screen on detergent
suction hose plugged
Clean or replace.
Dried up detergent
plugging metering valve
Disassemble and clean thoroughly
High viscosity of detergent Dilute detergent to specifications.
Hole in detergent line(s) Repair hole.
Low detergent level Add detergent, if needed.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump sucking air Check water supply and possibility of air
seepage.
Valves sticking Check and clean or replace if necessary.
Nozzle incorrectly sized Check and replace if necessary
(See serial plate for proper size).
Unloader valve seat faulty Check and replace if necessary.
Worn piston packing Check and replace if necessary.
BURNER MOTOR
WILL NOT RUN
Fuel pump seized Replace fuel pump.
Burner fan loose or
misaligned
Position correctly, tighten set screw.
Defective control switch Replace switch.
Loose wire Check and replace or tighten wiring.
Defective burner motor Replace motor.
RELIEF VALVE
LEAKS WATER
Relief valve defective Replace or repair.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
16
POSSIBLE CAUSES
SYMPTOM
Low fuel level X X X
Fuel supply/return lines clogged X X X X
Clogged fuel tank vent X X
Fuel pump faulty X X X
Fuel entrained with air X X X X
Unit injector(s) faulty/worn X X X X X X X
Unit injector settings incorrect X X X X X X X
Injection pump rack sticking X X X
Oil level too high X X X X X X X
Improper oil viscosity X X X
Oil diluted by fuel X X X X X
Oil pressure relief valve faulty X
Oil pick-up tube clogged X
Oil pump air entrained at pick-up tube X
Glow plugs faulty X X
Glow plug controller faulty X
Glow plug relay inoperable X
Starter defective X
Battery voltage too low X
Battery-cable connections corroded X
Key switch defective X
Air filter clogged X X X X X X X
Excessive idle/light load operation X X X X
Incomplete engine run-in X X X
Engine overload X X X X X X X
Excessive parasitic load X X X
Valve lash insufficient/excessive X X X X
Injection timing out of spec-advanced X X X X X
Injection timing out of spec-retarded X X X
Governor linkage adjustment incorrect X X X X
Governor spring fatigued or defective X X X
Idle rpm too low X X
Piston rings worn or stuck X X X X X
Piston worn or damaged X X X X X X X
Cylinders worn or damaged X X X X X X X
Valve(s) guide(s) worn X X X X X
Valves sticking X X X X X X X
Bearings (main/road) worn X X X
Governor linkage malfunction X X X X X
Cylinder head gasket damaged X X X
Thermostat stuck or malfunctioning X
Engine seized X
Radiator clogged (external or internal) X
Coolant pump faulty X
Turbocharger faulty X X X X X X X
Engine does not start Engine starts but stops Poor acceleration Unsteady RPM Black smoke White smoke Blue smoke Low oil pressure Oil level rising Excessive oil consumption Wet exhaust Overheating Engine knocks
ENGINE TROUBLESHOOTING

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
17
PRESSURE WASHER OPERATOR’S MANUAL
MAINTENANCE & SERVICE
1. Check to see that water pump is properly
lubricated.
2. Follow winterizing instructions to prevent freeze
damage 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 cleaning products.
7. Never run pump dry for extended periods of time.
8. Use clean fuel-kerosene, No. 1 fuel oil, or diesel.
Clean or replace fuel filter every 100 hours of
operation. Avoid water contaminated fuel as it will
damage the fuel pump.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, not letting water reach
maximum operating temperature.
10. Never allow water to be sprayed on or near engine
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.
The area around the Landa washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
Unloader Valves:
Unloader valves are preset and tested at the factory
before shipping.Tampering with the factory setting may
cause personal injury and/or property damage, and will
void the manufacturers warranty.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever 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 com-
pressed air is available, an air fitting can be screwed
into the 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 Water Thermostat:
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
cools then automatically reset itself. The thermostat
sensor is located on the discharge side of the heat-
ing coil. The thermostat control dial is located on the
control panel.
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, 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
by the extreme heat build up in the coil. The best pre-
ventative 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 #8.718-911.0) will remove lime
and other deposits before coil becomes plugged.
(See Deliming instructions for use of Landa Deliming
Powder.)
Deliming Coils:
Periodic flushing of coils or optional float tank is
recommended.
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: Remove wand assembly from spray gun and
put 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 solution
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.

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
18
MAINTENANCE & SERVICE
Removal of Soot and Heating Coil:
In the heating process, fuel residue in the form of soot
deposits may develop between the heating coil pipe
and 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 page).
Rupture Disk:
If pressure from pump or thermal expansion should
exceed safe limits, the rupture disk will burst allowing
high pressure to be discharged through hose to ground.
When the disk ruptures it will need to be replaced.
Torque new rupture disk to 35 ft. lbs.
Fuel:
Diesel fuel must be clean, fresh, meet fuel specifica-
tions and be sourced from a known and reputable
supplier. Clean, fresh and properly specified diesel
fuel will provide assurances of maximum engine per-
formance and maximum fuel injection system longevity.
The use of out-of-spec, dirty or questionable quality
diesel fuel will result in engine performance and start
ability problems as well as reductions in engine and
fuel injection system life.
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every 100
hours of operation.
All burner combustion system designs are geared
toward the use of commercial grade diesel fuels. As
such, use of fuels other than those designated "DF",
i.e. DF2 (No. 2 Diesel Fuel), will result in degradation
of performance and/or reduction in component life. It
is understood that applications in certain situations re-
quire the use of fuels other than No. 2 diesel fuel. See
list of various fuels and comments pertaining to each.
Diesel engines are designed to operate on No. 2 diesel
fuel. However, some geographical areas, change the
diesel fuel supply depot to No. 1 diesel fuel in the winter
months because of the col winter temperatures. No. 2
diesel fuel provides maximum viscosity and lubricity
but can have "waxing" problems at lower temperatures.
We expressly recommend the use of No. 2 diesel fuels
when temperatures are at or above 14°F. We recom-
mend that No. 1 diesel fuel be used when temperatures
are at or below 14°F.The use of either EPA-high sulfur,
off-highway diesel fuel or EPA-low sulfur, on-highway
fuel for non-CARB certified engines is allowed. CARB
certified engines must consume only EPA-low sulfur
diesel fuels conforming to EPA 40 CFR 86-113-94.
We do not recommend the use of "heating oil", blended
fuel/waste engine oil or low grade diesel fuel of any
kind. The use of aviation fuels - JP4, JP5 or JP8 must
be approved on an application basis and is not rec-
ommended for broad range commercial applications.
Fuel Control System:
This machine utilizes a fuel solenoid valve located on
the fuel pump to control the flow of fuel to the combus-
tion chamber. The solenoid, which is normally closed,
is activated by a flow switch when water flows through
it. When the operator releases the trigger on the spray
gun, the flow of water through the flow switch stops,
turning off the electrical current to the fuel solenoid.
The solenoid then closes, shutting off the supply of
fuel to the combustion chamber. Controlling the flow
of fuel in this way gives an instantaneous burn-or-no-
burn situation, thereby eliminating high and low water
temperatures and the combustion smoke normally
associated with machines incorporating a spray gun.
Periodic inspection, to insure that the fuel solenoid
valve functions properly, is recommended. This can
be done by operating the machine and checking to
see that the burner is not firing when the spray gun is
in the OFF position.
Fuel Quality / Storage
No. 1 and No. 2 diesel fuel degrades with time.No. 2 die-
sel fuel has a storage life of approximately one (1) year.
No. 1 diesel fuel has a maximum storage life of two (2)
years. Further, storage of diesel fuel in contaminated
storage tanks can lead to excessive impurities within
the stored fuel. As such, aged or contaminated diesel
fuel should not be used. Aside from the specifications
listed above, fuel measured to have total insolubles >
1 mg/100mg, organic material > 1 mg/100 ml or rust/
mineral matter > 2mg/ml should not be consumed in
diesel engines.
Fuel Grade/Type Comments
No. 2 Diesel Fuel (DF2)
No. 2-DS15
Recommended fuel
type for normal ambient
operation
No. 1 Diesel Fuel (DF1)
No. 1-D S15
Recommended fuel
type for cold weather
operation in ambients
which would result
in DF2 "waxing".
No degradation in
performance or engine/
component life.
JP 4 Turbine Fuel Not recommended. JP4
should be used only in
emergency situations.
JP 4 severely reduces
engine life and potential
power due to the lack of
lubricity as compared to
DF2.
Continued next page

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
19
PRESSURE WASHER OPERATOR’S MANUAL
MAINTENANCE & SERVICE
Fuel Grade/Type Comments
JP 8 Turbine Fuel 5-12% reduction in
power and up to 30%
reduction in fuel system
component and cylinder
life.
JP 5 Turbine Fuel Refer to JP 8
DF A Arctic Acceptable fuel for use
in sub-zero ambients
only.
Component failure that can be directly attributed to the
use of fuels other than those recommended cannot be
covered under warranty.
Fuel Pressure Adjustment:
To control water temperature, adjust fuel pressure
by turning the regulating pressure adjusting screw
clockwise to increase, counterclockwise to decrease.
Do not exceed 200 psi. NOTE: When changing fuel
pump, a bypass plug must be installed in return port
or fuel pump will not prime.
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with
a clean, solvent saturated cloth, being careful not to
plug or enlarge the nozzle. For maximum efficiency,
replace the nozzle each season.
Electrodes Setting:
(See Illustration Below)
Air Adjustment:
The oil burner on this machine is preset for
operation at altitudes below 1000 feet. If operated at
higher altitudes, it may be necessary to adjust the air
band setting. Adjust air band for #1 or #2 smoke spot
on the Bacharach scale. A one-time initial correction
for your location will pay off in economy, performance,
and extended service life. If a smoky or eye-burning
exhaust is being emitted from the stack, two things
should be checked. First, check the fuel to be certain
that kerosene or No. 1 home heating fuel is being used.
Next, check the air adjustment on the burner.
LANDA Sure Fire Oil Burner
Burner Air Adjustment:The oil burner on this machine
is preset for operation at altitudes below 1000 feet. If
operated at higher altitudes, it may be necessary to
adjust the air band for a #1 or #2 smoke spot on the
Bacharach scale.
To adjust, start machine and turn burner ON. Loosen
two locking screws found on the air band and close air
band until black smoke appears from burner exhaust
vent. Note air band position. Next, slowly open the air
band until white smoke just starts to appear. Turn air
band halfway back to the previously noted position.
Tighten locking screws.
Burner Air Adjustment
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
NOTE: If a flue is installed, have a professional
serviceman adjust your burner for a #1 or #2 smoke
spot on the Bacharach scale.
Coil Removal:
Removal of coil because of freeze breakage, or to clean
soot from it can be done quickly and easily.
1. Disconnect hose from pump to inlet side of the coil.
2. Carefully disconnect the thermostat sensor making
sure you do not crimp the capillary tube.
3. Remove burner assembly from combustion
chamber.
4. Remove the 3-3/8" bolts from each side of coil and
tank assembly (these bolts are used to fasten tank
to chassis).
5. Remove fittings connected to the 1/2" pipe nipples
from inlet and discharge sides of coil.
1/16"
5/32" Gap
Nozzle
7/16"
Top View Side View
89199800-23
Electrode
Reference Numbers
Air Band Locking Screws
Air Band

Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13
OPERATOR’S MANUAL PRESSURE WASHER
20
6. Remove top tank wrap, bend back insulation tabs
and fold back blanket.
7. Remove bolts that hold down coil to bottom wrap.
8. Remove coil.
9. Replace or repair any insulation found to be torn
or broken.
10. Remove insulation retainer plates.
Coil Reinstallation:
To reinstall new or cleaned coil, reverse steps 9 through 1.
MAINTENANCE & SERVICE