Landa EHW4-2000C User manual

8.941-114.0
OPERATOR’S MANUAL
For technical assistance or the Landa Dealer nearest you, consult our web page at
www.landa.com or call 360-833-1600
EHW4-2000C EHW4-3000C
EHW
Cold Water
Inlet Hot Water
Outlet
®
EHW 4-2000
CAUTION
NeverUse
:
•Bleach,chlorine products and other corrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphateproducts
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
HEATER
ON
TIMER—7 DAY
CONTROLADORDETIEMPODESIETEDIEAS
MINUTERIEDE7JOURS
POWER
CORRIENTE
COURANT
HEATER
CALENTADOR
CHAUFFE-EAU
PULLOUTPINSTOSETDESIRED“ON”TIMES
EXTRAIGALASCLAVIJASPARAESTABLECERELTIEMPODESEADO.
TIRERLESPOINTEURSVERSL’EXTERIEURPOURE’TABLIR
LESHORAIRESD’OPERATION
10-0726
ON
PRENDER
O
I
OFF
APAGAR
ETTEINT
.
EXPOSED PULLEYS AND
BELTSCANCAUSE INJURY
PRECAUCION/AVERTISSEMENT
WARNING

CONTENTS
2
8.941-114.0 • LANDA EHW • Rev. 08/12
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.
Introduction & Important Safety Information 3-4
Pre-Operation Check 4
Component Identification 5
Assembly Instructions 6-7
Operating Instructions 8
Detergents & General Cleaning Techniques 9
Shut Down Procedures 10
Storage 10
Preventative Maintenance & Oil Change Record 11
Maintenance 12
Troubleshooting 13-15
Exploded View, Left Side 16
Exploded View, Right Side 17
Exploded View Parts List 18
Electrical Box, Exploded View and Parts List 19
Cabinet Exploded View 20-21
Cabinet Parts List 22
Hose and Spray Gun Assembly 23
Hand Held Wireless: Exploded View, Parts List and Instructions 24-27
Downstream Injector Assembly 28
Pump Assembly 29
LT.1 Series Pump Exploded View and Parts List 30-31
Specifications 32-33
Warranty

8.941-114.0 • LANDA EHW • Rev. 08/12
3
PRESSURE WASHER OPERATOR’S MANUAL
Thank you for purchasing a Landa Pressure Washer.
This manual covers the operation and maintenance of
the EHW4-20024C and EHW4-30024C washers. All
information in this manual is based on the latest product
information available at the time of printing.
Landa, Inc. reserves 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 warn-
ings before using this Landa 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
comprehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’ 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.
IMPORTANT SAFETY
INSTRUCTIONS
WARNING: When using this machine basic pre-
cautions should always be followed, including the
following:
WARNING:To reduce the risk of
injury, read operating instruc-
tions carefully before using.
1. Read the owner's manual
thoroughly. Failure to fol-
low instructions could cause
malfunction of the machine
and result in death, serious
bodily injury and/or property
damage.
2. Know how to stop the machine and bleed pres-
sures quickly. Be thoroughly familiar with the
controls.
3. Stay alert — watch what you are doing.
4. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling distributor for specific details.
5. This machine requires that it be installed by a
qualified electrician. This product shall only be
connected to a power supply receptacle protected
by a ground fault circuit interrupter.
WARNING: Keep water spray
away from electric wiring or fa-
tal electric shock may result.
6. To protect the operator from
electrical shock, the machine
must be electrically ground-
ed. It is the responsibility of
the owner to connect this
machine to a UL grounded
Receptacle of proper voltage and amperage rat-
ings. Do not spray water near electrical compo-
nents. Do not touch machine with wet hands or
while standing in water. Always disconnect power
before servicing.
CAUTION: Spray gun kicks back — hold with both
hands.
7. Grip spray-gun and wand securely before start-
ing this machine. Failure to do this could result in
bodily injury from a whipping wand.
WARNING: Flammable liquids
can create fumes which can
ignite causing property dam-
age or severe injury.
WARNING: Risk of fire. Do
not install or operate near
any flammable liquids.
WARNING: Before obtaining
access to electric terminals,
all supply circuits must be disconnected.
9. Electrical 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.
WARNING: High pressure
stream of fluid that this equip-
ment can produce can pierce
skin and its underlying tissues,
leading to serious injury and
possible amputation.
WARNING: Risk of injection or
severe injury. Keep clear of
nozzle. Do not direct discharge
stream at persons. This equipment is to be used
only by trained operators.
10. Never make adjustments on machine while it is
in operation.
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
WARNING
KEEP WATER SPRAY
AWAY FROM ELEC-
TRICAL WIRING.
WARNING
HIGH PRESSURE
STREAM CAN PIERCE
SKIN AND TISSUES.
INTRODUCTION & IMPORTANT SAFETY INFORMATION
WARNING
RISK OF FIRE. DO NOT
OPERATE NEAR
FLAMMABLE LIQUIDS.

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
4
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne
and fly at high speeds.
11. Eye, hand and foot safety
devices must be worn when
using this equipment.
12. Machines with spray guns
should not be operated with
the spray gun in the off posi-
tion for extended periods of time as this may cause
damage to the pump.
13. Protect from freezing.
14. Protect discharge hose from vehicle traffic and
sharp objects.
15. To prevent a serious injury, be certain quick coupler
on discharge hose has locked before using pres-
sure washer.
16. Before disconnecting discharge hose from hot wa-
ter outlet, disconnect power supply, open spray gun
to relieve back pressure in hose and use protective
gloves.
17. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
18. Inlet water supply must be cold and clean fresh
water.
19. The best insurance against an accident is pre-
caution and knowledge of the machine.
20. Landa will not be liable for any changes made to
our standard machines, or any components not
purchased from Landa.
21. 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.
22. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
23. Follow the maintenance instructions specified in
the manual.
24. When making repairs disconnect from electrical
source.
25. Do not operate this product when fatigued or under
the influence of alcohol or drugs. Keep operating
area clear of all persons.
26. WARNING: Do not use below garage floor or
grade level.
PRE-OPERATION CHECK
 Heat module water level
 Pump oil (SAE 30W non-detergent oil)
 Cold water supply (6 gpm • 5/8" • 20 psi)
 Proper power supply
 Hose, wand, nozzles (nozzle sizes per serial
plate)
 Water filter (intact, non restrictive)
 Read installation and operation instructions
Follow the maintenance instructions
specified in the manual.
IMPORTANT SAFETY INFORMATION
WARNING
PROTECTIVE
EYE WEAR AND
CLOTHING
MUST BE WORN.

8.941-114.0 • LANDA EHW • Rev. 08/12
5
PRESSURE WASHER OPERATOR’S MANUAL
TIMER — 7 DAY
CONTROLADORDE TIEMPO DE SIETE DIEAS
MINUTERIEDE 7 JOURS
POWER
CORRIENTE
COURANT
HEATER
CALENTADOR
CHAUFFE-EAU
PULL OUT PINS TO SET DESIRED“ON” TIMES
EXTRAIGALAS CLAVIJAS PARA ESTABLECER EL TIEMPO DESEADO.
TIRERLES POINTEURS VERS L’EXTERIEUR POUR E’TABLIR
LESHORAIRES D’OPERATION
10-0726
ON
PRENDER
O
I
OFF
APAGAR
ETTEINT
.
EXPOSED PULLEYS AND
BELTSCANCAUSE INJURY
PRECAUCION/AVERTISSEMENT
WARNING
®
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 Injector — Allows you to siphon and mix
detergents.
Wand — Must be connected to the spray gun.
Heat Exchanger — Has a stainless steel coil
suspended into an 80 gallon water tank that is heated
to 200° by heating elements.
High Pressure Hose — Connect one end to water
pump high pressure discharge nipple and the other
end to spray gun.
Unloader Valve — Safety device which, when the
spray gun closes, prevents over pressurization
(Not Shown.)
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.
Variable Pressure
Control Wand
Handle
Nozzle Quick
Coupler
Heat Exchanger
Inlet
Connector
Small High Pressure
Hose
Water Fill
Spout
Pressure
Nozzles
Pump Access
Panel
On/Off
Toggle Switch
Detergent
Injector
Discharge
Nipple
Quick Coupler
Collar
Water Supply
Hose
(not included)
Spray
Gun
Trigger
Swivel
Connector
Brass Soap
Nozzle
High Pressure
Hose Detergent Bucket
(Not included)

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
6
WARNING:
TANK FILL
ELBOW
DO NOT PLUG
VENT HOLE
Part No
GROUND
L2
L3
L1
L2
L3
L1
ASSEMBLY INSTRUCTIONS
STEP 1: Place machine in a con-
venient location providing ample
support, drainage and room for
maintenance. Remove pallet bolts
and remove pallet, then re-install
bolts to level by adjusting (machine
must be level).
STEP 3: Remove the hex head
screws from electrical access panel.
NOTE: bottom right screw will only
loosen; access panel is designed
to pivot on this screw. Once access
panel is rotated out of the way, at-
tach the electrical harness from
the pressure washer to the heating
module as follows:
a. Feed pressure washer wire
harness through the upper
wire hole located on the side
of the machine (See item 16
on page 20).
b. On the right side of the in-
coming power terminal block,
connect the black wire to line
L1, the red wire to line L2, and
the white wire to line L3.
c. Attach the green wire to the
ground terminal block.
CAUTION:Have qualified electri-
cian attach the proper supply
cord to the terminal labeled L1,
L2 and L3.
STEP 2: Place the pump package
on top of the heat exchange and at-
tach the small high pressure hose
to the fittings as shown.
Garden
Hose
CAUTION
NeverUse
:
•Bleach,chlorine products and other corrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphate products
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
Incoming
Power
Terminal
Block
Ground
Terminal
Block
STEP 4: Do not turn power on to equipment until the heating module is
filled with water, as severe damage may occur to heater elements.
Prior to shipping, a rust inhibitor powder was added to the hot water
tank. This powder will mix with the added water to prevent rust build-
up inside the tank.
Install water fill spout (item 15, page 20, shipped loose). Spout open-
ing should be facing up. Insert water hose and fill. Do not over fill to
allow for thermal expansion. (Maximum is 80 gallons). After heater
tank has been filled to the top, operate for one week and then add
one quart of oil to slow evaporation. Be sure to replace spout plug,
hand tight only.
Turn on main power supply to unit. Set 7 day programmable timer
to desired ON/OFF time and switch machine power on, Water will
heat up to operating temperature in 30 to 60 minutes. The heater will
turn off automatically when 200°F is reached. Water will come out of
heater fill spout due to heat expansion. However, this will stop after
temperature is reached.
Leave main power on to the machine to ensure hot water on pump
start up.
Small High
Pressure Hose
Water Fill
Spout

8.941-114.0 • LANDA EHW • Rev. 08/12
7
PRESSURE WASHER OPERATOR’S MANUAL
STEP 6: Pull the spring-loaded col-
lar 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.
ASSEMBLY INSTRUCTIONS
STEP 7: Release the coupler collar
and push the nozzle until the collar
clicks. Pull the nozzle to make sure
it is seated properly.
WARNING: These machines are
designed for indoor use. Machine
must be stored indoors when not
in use.
Wand
Collar
Pressure
Nozzle
STEP 5: Attach variable pressure
control wand to spray gun using
teflon tape on threads to prevent
leakage. Position safety latch to
prevent trigger from being pulled.
Trigger
Gun
Safety
Latch
Trigger
Wand
Pressure
Nozzle
Wand
Coupler

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
8
CAUTION
NeverUse
:
•Bleach,chlorine products and othercorrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphate products
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
CAUTION
NeverUse
:
•Bleach,chlorine products and other corrosive chemicals
•Liquidscontaining solvents (i.e. paint thinne r,gasoline,oil)
•Tri-sodiumphosphate products
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
OPERATING INSTRUCTIONS
STEP 1: Connect the high pressure
hose quick coupler to the discharge
nipple by sliding the quick coupler
collar back and inserting the quick
coupler onto the discharge nipple
and pushing the quick coupler collar
forward to secure it. Secure desired
pressure nozzle into variable pres-
sure wand coupler.
High Pressure
Hose Coupler
STEP 2: Connect water sup-
ply hose (garden hose) to inlet
connector. Do not allow acid or
abrasives to be pumped through
system. Turn on water.
Garden
Hose
Inlet
STEP 3: Place toggle switch in
the ON position and then pull the
trigger on the spray gun to activate a
pressure switch which will then start
the machine. The ON position is for
auto shut down.
STEP 4: Turn the variable pressure control handle clockwise
to increase pressure.
Selection of high or low pressure is accompanied by turning the
handle. NOTE: High pressure nozzle must be inserted at end of
wand to obtain high pressure. To apply soap read Detergents &
General Cleaning Techniques section.
Variable Pressure
Control Handle Trigger
Variable Pressure
Wand (VP)
High
Pressure
Nozzle
Brass Soap
Nozzle
STEP 5: To stop machine, release
the spray gun and machine will
automatically stop in approximately
12 seconds. If machine is going to
be unattended for long periods of
time, turn water supply off and place
switch in OFF position.
NOTE: When removing or
replacing hoses, wand and nozzles,
move switch to OFF position, open
spray gun to release pressure
before removing discharge hose.
CAUTION
NeverUse
:
•Bleach,chlorine products and other corrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphate products
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
Discharge
Nipple
Toggle
Switch

8.941-114.0 • LANDA EHW • Rev. 08/12
9
PRESSURE WASHER OPERATOR’S MANUAL
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 washers.
Household detergents could dam-
age the pump. Prepare detergent
solution as required by the man-
ufacturer. Fill a container with
pressure washer detergent. Place
the filter end of detergent suc-
tion tube into the detergent con-
tainer.
STEP 2: Apply safety latch
to spray gun trigger. Open
variable pressure wand
handle to low pressure
which allows water through
black detergent nozzle.
NOTE: Detergent cannot
be applied during high pres-
sure.
STEP 3: With the motor running, 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 injection
system after each use by placing the suction tube
into a bucket of clean water, then run the pressure
washer in low pressure 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.
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 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. Turn variable pres-
sure control handle to high pressure. NOTE: You can
also stop detergent from flowing by simply removing
detergent siphon tube from bottle.
WARNING
DETERGENTS & GENERAL CLEANING TECHNIQUES
TIMER— 7 DAY
CONTROLADORDETIEMPODESIETEDIEAS
MINUTERIEDE7JOURS
POWER
CORRIENTE
COURANT
HEATER
CALENTADOR
CHAUFFE-EAU
PULLOUTPINSTOSETDESIRED“ON”TIMES
EXTRAIGALASCLAVIJASPARAESTABLECERELTIEMPODESEADO.
TIRERLESPOINTEURSVERSL’EXTERIEURPOURE’TABLIR
LESHORAIRESD’OPERATION
10-0726
ON
PRENDER
O
I
OFF
APAGAR
ETTEINT
.
®
Detergent
Injector

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
10
®
CAUTION
NeverUse
:
•Bleach,chlorine products and other corrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphate products
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit and will damage the
surfacebeing cleaned.
SHUTDOWN PROCEDURES
STEP 1: Rinse all lines (and
injector) with clean water, to remove
any soap residue then turn toggle
switch off.
STEP 2: Turn off water supply. STEP 3: Open spray gun to relieve
remaining pressure and remove
water supply hose.
In freezing conditions, disconnect
water supply and open spray gun
to allow water to drain, then turn
off motor.
CAUTION: Do not allow pump to
run longer than 5 minutes without
water. Disconnect all hoses to
allow water to drain.
CAUTION:With machine off, open
spray gun to release pressure be-
fore removing discharge hose.
STORAGE
CAUTION
Pump Storage
CAUTION: Always store your pres-
sure 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.
If you must store your pressure washer in a location
where the temperature is below 32° F, you can minimize
the chance of damage to your machine by draining your
machine as follows:
1. Stop the pressure washer and detach supply hose
and high pressure hose. Squeeze the trigger of the
spray gun to drain all water from the wand and
hose.
2. Restart pressure washer and let it run briefly (about
5 seconds) until water no longer discharges from
the high pressure outlet.
Toggle
Switch

8.941-114.0 • LANDA EHW • Rev. 08/12
11
PRESSURE WASHER OPERATOR’S MANUAL
PREVENTATIVE MAINTENANCE
This pressure washer was produced with the best available materials and quality craftsmanship. However, you
as the owner have certain responsibilities for the correct care of the equipment. Attention to regular preventative
maintenance procedures will assist in preserving the performance of your equipment. Contact your Landa, dealer
for maintenance. Regular preventative maintenance will add many hours to the life of your pressure washer.
Perform maintenance more often under severe conditions.
OIL CHANGE RECORD
Pump Oil
Inspect Daily inspect the oil level
Change After first 50 hours, then every 500 hours or
annually
Replace High Pressure Nozzle Every 6 months
Replace Quick Connect Annually
Clean Water Screen/Filter Weekly
Replace HP Hose Annually if there is any sense of wear
Grease Motor Every 10,000 hours
Inspect Heater Module Tank Water Level Weekly
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last
Oil Change

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
12
MAINTENANCE
Daily:
To ensure a problem free system, simple visual checks
can be performed. Check for leaks in inlet supply,
pumping system, pump to heater hose, heater, spray
gun(s) and high pressure hose. Check for normal op-
erating functions and pump oil level/condition. Check
nozzle condition. If badly worn or leaking conditions
are found, qualified personnel should repair or replace
components with new original or equivalent manufac-
turers parts.
Check equipment for proper operation. Nozzle spray
should be uniform in flow, angle, and pressure. Clean
if nozzle is plugged and replace if worn. If a heavy
pulsation in the hose or spray is observed, repair of
the pumping system is required.
Weekly:
After the first week of operation, it is recommended
1 quart (1 litre) of motor oil be added to the heat ex-
changer tank through the 1-1/4" ll pipe. This oil cre-
ates a vapor barrier and slows evaporation of water
in the tank.
Check heat exchanger water level.The level must be up
to the filler pipe neck. Add water if necessary. If cold wa-
ter has been added, heating may cause the expanding
water to escape through the filler plug. This will stop
after operating temperature has been reached.
Monthly:
Check system for operation. Automatic start/stop, hot
high pressure water, and smooth operation should be
noted.
Change oil in pump crankcase. Note the condition of
the oil when drained. If found to be creamy, water seals
in pump may have to be removed and replaced.

8.941-114.0 • LANDA EHW • Rev. 08/12
13
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger garden hose; clean filter
washer at water inlet.
Old, worn or incorrect spray nozzle Match nozzle number to machine
and/or replace with new nozzle.
Plumbing or hose leak Check plumbing system for leaks.
Retape leaks with teflon tape.
Faulty or misadjusted unloader valve
(where applicable)
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.
Leaking pressure control valve
(where applicable) Rebuild or replace as needed.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and clean out if necessary.
Pump sucking air Check water supply and suction line
for air seepage at joints.
Worn piston packing Check and replace if necessary.
PRESSURE LOW
AFTER PERIOD
OF NORMAL USE
Nozzle worn Check and replace if necessary.
Inlet or discharge valves blocked
or worn Check and clean or replace if necessary.
Unloader valve seat worn Check and replace if necessary.
PUMP NOISY Air in suction line Check water supply connections
on suction line.
Broken or weak inlet or discharge
valve springs Check and replace if necessary.
Foreign matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
PRESENCE OF
WATER IN
PUMP OIL
Water sprayed at machine Change oil. Direct spray away from
machine.
High humidity in air Check and change oil twice as often.
Piston packing worn Oil seal worn Check and replace if necessary.

8.941-114.0 • LANDA EHW • Rev. 08/12
PRESSURE WASHER Troubleshooting Guide
14
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
OIL SQUIRTS OUT
OF OIL CAP ON PUMP
Pump overfilled with oil Maintain oil level at red dot on sight glass
at rear of pump or at top of notch on
dipstick (where applicable).
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.
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.
SYSTEM WILL
NOT START
Power, water, auto switch not on Check and turn on.
Motor overload tripped Check and reset.
Control fuse blown (2 or 3 amp) Check and replace.
Pressure switch faulty Check, clean or replace.
Timer faulty Check and replace.
SYSTEM WILL
NOT STOP
Water leak in discharge line Repair water leak.
Pressure switch faulty Disconnect at timer. If unit stops,
replace pressure switch.
Timer resistor faulty Replace timer.
SYSTEM STOPS AFTER
APPROXIMATELY
10 SECONDS AND
THEN RESTARTS
Faulty pressure switch Check and replace.
Leak in system Fix leak.
WATER IS
NOT HOT
Tank water low Check for leaks and fill.
Temperature or level controls faulty Check and replace.
MOTOR ”HUMS” BUT
DOES NOT TURN
Electric motor single phasing Check for blown fuse or loose power
line connections.
PUMP RUNNING
NORMALLY BUT LOW
WATER PRESURE
Air leak in inlet Check water supply and possibility
of air entering water connections.
Faulty pressure unloader Bypass pressure unloader by wiring spray
gun open. If good PSI, turn machine off
and replace regulator. DO NOT
RELEASE SPRAY GUN WHILE
BY PASSING UNLOADER.

8.941-114.0 • LANDA EHW • Rev. 08/12
15
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
WATER ESCAPING
FROM FILL PIPE ON
HEAT EXCHANGER
Cold water added to heat exchanger Will stop once at operating
temperature.
Ruptured coil or leaking Check, repair or replace fittings.
UNLOADER DOES
NOT GO INTO
BYPASS OR
WILL CYCLE ITSELF
Spray gun or hose is leaking
to atmosphere
Check and repair all leaks.
Check plunger either did not move
or did not seal
Remove discharge port. Clean
and inspect the check plunger.
Replace the O-ring if needed.
Actuator O-ring failure Remove actuator plunger assembly
and inspect O-ring and back-up rings.
Replace if necessary.
SPIKES
TOO HIGH
Slow moving actuator; this may be
caused by bad O-rings either on the
plunger or inside the actuator fitting
Remove the actuator assembly to
inspect the O-ring and back-up rings.
The actuator assembly will have to be
disassembled to inspect and/or replace
the O-rings in the actuator fitting.
Spring tension Adjustment should stop when pressure
is no longer affected by further
compression of the spring.
Hose length Hose length can affect the amount of
spike pressure. Long lengths of hose
may cause high spike pressures.
SYSTEM WON’T
COME UP
TO PRESSURE
Water is leaking between ball
and seat
Disassemble inlet fitting and check
for contaminates or worn parts.
Clean or replace as needed.
Cs on actuator plunger
are bad
Remove actuator assembly and
inspect O-ring and back-up rings.
Replace if necessary.
Locknut may be improperly set Readjust locknut.
NOTE: The locknut is inside the spring
on models that have the stem exposed
above the spring.
Tip/GPM combination is incorrect Check actual GPM on unrestricted
pump and size tip accordingly.
Tip worn- the GPM may be greater
than expected with a worn tip
Replace tip.
Bad gauge - the pressure may
be higher than the gauge shows
Replace gauge.

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
16
30
34
31
15
15
EXPLODED VIEW - LEFT SIDE
14
13
9
18
15
16
17
39
29
41
37
40
38
14
32
For Detail See
Electrical Box,
Page 19

8.941-114.0 • LANDA EHW • Rev. 08/12
17
PRESSURE WASHER OPERATOR’S MANUAL
®
Cold Water
Inlet
Cold Water
Outlet
ON
PRENDER
OFF
I
O
APAGAR
CAUTION
NeverUse
:
•Bleach,chlorine products andothercorrosive chemicals
•Liquidscontaining solvents (i.e. paint thinner,gasoline,oil)
•Tri-sodiumphosphateproducts
•Ammoniaproducts
•Acid-basedproducts
Thesechemicals will harm the unit andwill damage the
surfacebeing cleaned.
EXPOSED PULLEYS AND
BELTSCAN CAUSE INJURY
PRECAUCION/AVERTISSEMENT
WARNING
EXPLODED VIEW - RIGHT SIDE
24
25
22
47
47
48
36
48
50
17
46
3
2
43
47
48
26
11
3
12
54
1
8
15
47
4
49
9
3
44
53
10
5
52
35
51
14
20
14
19
6
23
27
48
45
21
26
7
48
49
17
28
39
To Coil in
Lower Cabinet
42
33
3

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
18
EXPLODED VIEW PARTS LIST
ITEM PART NO. DESCRIPTION QTY
1 8.712-361.0 Nozzle, 0006, Red (4-2000) 1
8.712-362.0 Nozzle, 1506, Yellow (4-2000) 1
8.712-363.0 Nozzle, 2506, Green (4-2000) 1
8.712-364.0 Nozzle, 4006, White (4-2000) 1
8.712-345.0 Nozzle, 0004, Red (4-3000) 1
8.712-346.0 Nozzle, 1504, Yellow (4-3000) 1
8.712-347.0 Nozzle, 2504, Green (4-3000) 1
8.712-348.0 Nozzle, 4004, White (4-3000) 1
2 9.802-064.0 Grommet, Rubber,
Nozzle Holder 4
3 9.802-074.0 Nut, 1/4" Square Head 12
4 8.912-140.0 Cabinet, SEA, SS 1
5 9.802-522.0 Strain Relief, 1" 1
6 8.900-262.0 Label, Control Panel 1
7 8.900-232.0 Label, EHW 1
8 8.900-409.0 Label, 4-2000 1
8.900-411.0 Label, 4-3000 1
9 9.800-020.0 Label, Cold Water Inlet 1
10 8.932-970.0 Label, Cold Water Outlet 1
11 8.707-000.0 Connector, 1/2" Anchor 1
12 8.706-998.0 Connector, 3/8" Anchor 1
13 Motor, See Specifications Pages 1
14 9.802-788.0 Nut, 3/8" Whiz Loc SS 14
15 9.802-808.0 Washer, 3/8", SAE, SS 14
16 9.802-520.0 Strain Relief, 3/4"
(EHW4-2000C) 1
9.802-522.0 Strain Relief 1" (EHW4-3000C)
17 9.802-721.0 Bolt, 3/8" x 1" SS 10
18 9.802-774.0 Nut, 1/4" ESNA, NC, SS 2
19 9.800-016.0 Label, Electrical
Disconnect Warning 1
20 9.802-146.0 Swivel, 1/2" MP x 3/4" GHP
w/Strainer 1
21 9.802-724.0 Bolt, 3/8" x 1-1/2", HH NC,
SS 4
22 9.802-452.0 Switch, Rocker, Carling,
M-Circuit, Red 1
9.802-451.0 Switch, Rocker, Carling,
w/Green Light
(Auto Start/Stop Option) 1
23 9.802-067.0 Bumper Pad, Engine 4
24 9.802-066.0 Pad, Soft Rubber, Duro 50 4
25 9.802-818.0 Washer, 3/8" x 1", SS 4
26 9.802-760.0 Screw, 1/4" x 1/2", BH SOL
C/S SS 6
27 9.802-812.0 Washer, 7/16" x 2-1/2", Zinc 4
28 9.802-039.0 Elbow, 1/2" JIC x 3/8" MPT 1
29 8.904-874.0 Pump, LT5030R 1
30 8.718-682.0 Bolt, 3/8" x 3-1/2", Tap, SS 2
31 9.803-136.0 Retainer, Pump Take UP 1
ITEM PART NO. DESCRIPTION QTY
32 9.802-827.0 Nut, 3/8", SS 2
33 8.932-969.0 Label, Warning Service Cord 1
34 9.803-131.0 Rail, Pump 1
35 9.803-127.0 Cover, Access Hole, SEA 1
36 9.800-049.0 Label, Manufacturers
Cleaning Solution 1
37 9.802-259.0 Hose, 1/2" Push-on 15"
38 9.802-151.0 Swivel, 1/2" JIC Fem,
Push-on 2
39 8.918-422.0 Hose, 3/8" x 20", 2 Wire,
Pressure Loop 2
40 9.802-131.0 Elbow, 1/2" JIC x 3/8", 90° 1
41 9.802-039.0 Elbow, 1/2" JIC x 3/8", 90° 1
42 8.912-141.0 Cover, SEA, Stainless Steel 1
43 9.802-071.0 Trim, 1/16", Black 8.25 ft.
44 8.900-826.0 Label, Warning Instructions 1
45 8.932-965.0 Label, Warning - Exposed
Pulleys 1
46 8.900-832.0 Label, Stripe 2
47 8.719-002.0 Washer, 5/16" x 1-1/4",
Fender SS 4
48 8.718-757.0 Screw, 1/4" x 1/2" SS,
Phil, PH 6
49 9.802-073.0 Weather-strip, 1/8" x 1/2" 3.5 ft.
50 Motor Bushing, See Specifications Pages 1
51 Pump Bushing, See Specifications Pages 1
52 Motor Pulley, See Specifications Pages 1
53 Pump Pulley, See Specifications Pages 1
54 Belt, See Specifications Pages 2

8.941-114.0 • LANDA EHW • Rev. 08/12
19
PRESSURE WASHER OPERATOR’S MANUAL
GROUND
89411140-3
ELECTRICAL BOX EXPLODED VIEW
ITEM PART NO. DESCRIPTION QTY
1 Contactor, See Specifications Pages 1
2 Overload, See Specifications Pages 1
3 9.802-695.0 Nut, 10/32" KEPS 6
(Auto Start/Stop Option) 1
4 9.802-457.0 Din Rail 6"
(Auto Start/Stop Option) 4"
5 9.800-040.0 Label, Ground 1
6 9.802-476.0 Box, Plastic 10" x 8" x 6"
w/Lid 1
7 9.803-038.0 Bracket, Support Elec Box 1
8 9.802-524.0 Locknut, 1/2" 2
9 9.802-759.0 Screw, 10/32 x 1/2 BH SOC
BLK 3
10 9.802-762.0 Screw, 10/32" x 1-1/4"
RH SC BLK 1
(Auto Start/Stop Option) 1
11 9.802-515.0 Strain Relief, 1/2" St. Med 1
12 9.802-424.0 Cord, Service, SEO 16/4 38"
ITEM PART NO. DESCRIPTION QTY
13 9.802-514.0 Strain Relief, 1/2" Small 1
14 9.802-518.0 Strain Relief, 3/4" St. Large 2
15 9.802-429.0 Cord, Service SEO 12/4 10'
16 9.802-429.0 Cord, Service, SEO 12/4 38"
17 Transformer, See Specifications Pages 1
18 Primary Fuse, See Specifications Pages 2
19 Secondary Fuse, See Specifications Pages 1
20 8.751-306.0 Timer, Multi-Function
24V-120/240V 5A 1
21 9.802-468.0 Relay, 120VRH28-UL-AG120 1
22 9.802-467.0 Base, Relay, SH2B-05,
IDEC 1
23 9.802-526.0 Locknut, 3/4" 2
ELECTRICAL BOX EXPLODED VIEW PARTS LIST
1
2
3
4
5
910
11
12
13
6
14
7
15
8
16
17
18
19
20
21
22
3
23
9

8.941-114.0 • LANDA EHW • Rev. 08/12
OPERATOR’S MANUAL PRESSURE WASHER
20
.
WARNING:
TANKFILL
ELBOW
DONOTPLUG
VENTHOLE
PartNo
CABINET EXPLODED VIEW - LEFT SIDE
1
2
6
5
4
7
9
8
3
10
11
13
12
17
16
15
14
42
43
44
45
46
47
24
To
Pressure
Washer
43
43
58
65
66