Landa Pgdc4-3500 User manual

8.916-596.0
OPERATOR’S MANUAL
■PGDC4-3500 ■PGDC5-3500 ■PGDC5-3500
1.110-049.0 1.110-050.0 1.110-051.0
PGDC
For technical assistance or the dealer nearest you,
consult our web page at www.landa.com
8916596-1
GAS
8.916-274.0
DIESEL
8.932-960.0

CONTENTS
2
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.
LANDA PGDC • 8.916-596.0 • REV. 5/13
Introduction & Important Safety Information 3-5
Pre-Operation Check 5
Component Identification 6
Assembly Instructions 7
Battery Installation 7
Operation Instructions 8
Detergents & General Cleaning Techniques 9
Shutting Down 10
Storage 10
Troubleshooting 11-14
Maintenance & Service 15-17
Preventative Maintenance 18
Exploded View & Parts List 19-21
Power Platform Exploded View & Parts List 22-23
Control Box, Exploded View & Parts List 24
Coil Assembly Exploded View & Parts List 25
Option, Float Tank Assembly Exploded View & Parts List 26
Hose & Spray Gun Assembly & Parts list 27
Burner Exploded View & Parts List 28
Unloader/Pump Exploded View & Parts List 29
Specifications 30-31
Landa Sure Fire Burner Replacement Parts 32-33
LT Pump Exploded View and Parts List 34-35
VRT 3 Unloader Exploded View and Parts List 36
Warranty

LANDA PGDC • 8.916-596.0 • REV. 5/13
3
PRESSURE WASHER OPERATOR’S MANUAL
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
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
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 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 protection
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.

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL
PRESSURE WASHER
4
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 exhaust
fans. Adequate oxygen is
needed for combustion or
dangerous carbon 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 PGDC • 8.916-596.0 • REV. 5/13
5
PRESSURE WASHER OPERATOR’S MANUAL
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
specified in the manual.

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL
PRESSURE WASHER
6
8916596-19
GAS
8.916-274.0
DIESEL
8.932-960.0
COMPONENT IDENTIFICATION
Detergent
Pick Up
Tube
Water Supply
Hose (not
included)
Detergent
Bucket
(not included)
High Pressure
Hose
Fuel Oil
Tank
Variable
Pressure
Control
Wand Handle
Variable Pressure
Control Wand
Nozzle
Engine
Switch
Spray
Gun
Nozzle
Quick
Coupler
Discharge
Nipple
Rupture
Disk
Gasoline
Tank
Pressure
Nozzles
Burner
Switch
Trigger
Fresh
Water
Inlet
Detergent
Injector
(not included)

LANDA PGDC • 8.916-596.0 • REV. 5/13
7
PRESSURE WASHER OPERATOR’S MANUAL
GAS
8.916-274.0
DIESEL
8.932-960.0
8916596-22
ASSEMBLY INSTRUCTIONS
STEP 1: Attach a 5/8" water supply
hose to inlet connector. Minimum
flow should be 6 or 10 gpm depend-
ing on model of machine.
STEP 2: Attach wand to spray gun
using teflon tape on threads to pre-
vent leakage. Attach swivel connec-
tor on discharge hose to spray gun
using teflon tape on threads. Attach
swivel connector on high pressure
hose to spray gun using teflon tape
on threads. Engage safety latch to
prevent from triggering gun when
inserting high pressure nozzle.
STEP 3: Attach high pressure hose
to discharge nipple using quick
coupler. Lock coupler securely into
place by pulling back coupler col-
lar and inserting it into discharge
nipple, then pushing collar forward
to lock in place.
STEP 4: Check engine and pump oil
level by removing oil dipstick, mak-
ing sure oil is on proper indicator
marking. Oil should be visible one
half way up sight glass (SAE 30W
non-detergent).
STEP 5: Fill red gasoline tank. Fill
green fuel tank. Do not confuse
gasoline and fuel oil (diesel) tanks.
Keep proper fuel in proper tank.
STEP 6: Install proper battery
making sure that the red cable is
attached to the positive terminal.
Use a 12V Group 24 battery on
all models except 4-40321 and 5-
35321E.These models use a U1 30
amp garden tractor style battery.
8916596-26
8916596-11
High
Pressure Hose
Spray
Gun
Spray Wand
Safety
Latch
GAS
8.916-274.0
DIESEL
8.932-960.0
8916596-24
High
Pressure
Hose
Discharge
Nipple
8916596-23
Gasoline
Burner Fuel
8916596-10
BATTERY INSTALLATION
Due to Federal Regulations concerning shipment of
corrosive chemicals, batteries are not shipped with
this machine.
Local purchase
of battery will be
the responsibility
of the owner. Au-
tomotive type 12
Volt Group 24 bat-
tery is recommended for placement within the weather
resistant box. Follow safety and installation instructions
furnished with the battery.
SHIELD
EYES
EXPLOSIVE
GASES
CAN CAUSE
BLINDNESS OR INJURY
NO
SPARKS
FLAMES
SMOKING
SULFURIC
ACID
CAN CAUSE
BLINDNESS OR
SEVERE BURNS
FLUSH EYES
IMMEDIATELY
WITH WATER
GET
MEDICAL
HELP
FAST
KEEP OUT OF THE REACH OF CHILDREN. DO NOT TIP. KEEP VENT CAPS TIGHT AND LEVEL.
DANGER / POISON
8916596-30
Black - Negative
Terminal
Red + Positive
Terminal
Red Cable is attached to battery (+) positive terminal,
black cable is connected to battery (-) negative termi-
nal.
Black
Red

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL PRESSURE WASHER
8
8916596-14
OPERATION INSTRUCTIONS
STEP 4: 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 6: 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 detergent, place detergent pick-up tube into a container of deter-
gent and turn the detergent valve counterclockwise.
8916485-2
Variable Pressure
Control Handle
Trigger
Variable Pressure
Wand (VP)
High
Pressure
Nozzle
Brass Soap
Nozzle
STEP 5: For hot water, turn 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.
8916596-3
8916596-15
Burner
Switch Detergent
Valve
8916596-5
STEP 1: Read operator’s manual
before operating. Pull wand cou-
pler collar back, insert desired
pressure nozzle into coupler, then
secure by pushing collar forward.
CAUTION: Never replace nozzles
without engaging the safety latch
on the spray gun trigger.
STEP 2: Turn on water at faucet
and pull trigger on spray gun al-
lowing water to flow until all air has
discharged from system. Check for
water leaks; tighten as needed.
NOTE: Variable pressure control
wand handle must be turned clock-
wise to enable water to flow out of
the high pressure nozzle.
STEP 3: Read engine manual.
Move fuel valve to closed or OFF po-
sition, if equipped. To start engine,
if choke is closed, gradually move it
to the open position as the engine
warms up. Turn the engine switch to
the START position and hold it there
until the engine starts.
NOTE: Do not use the electric
starter for more than five seconds
at a time. If the engine fails to start,
release the switch and wait ten
seconds before operating the starter
again.When the engine starts, allow
the engine switch to return to the ON
position. If the engine is to be started
without the battery, turn switch to
start position and pull rope to start.
Turn off choke.
CAUTION: Small engines may
kick back. Do not hold pull rope
tightly in hand.
High Pressure
Nozzle
8916596-6
Wand
Coupler
Collar
Engine
Switch

LANDA PGDC • 8.916-596.0 • REV. 5/13
9
PRESSURE WASHER OPERATOR’S MANUAL
DETERGENTS & GENERAL CLEANING TECHNIQUES
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: Apply safety latch to spray gun trigger.
Secure black detergent nozzle into quick coupler. NOTE:
Detergent cannot be applied using the Yellow nozzle.
STEP 3: Selection of high or low pressure is accom-
panied by turning the handle. NOTE: High pressure
nozzle must be inserted at end of wand to obtain high
pressure. To apply soap connect detergent injector
to discharge nipple and secure by pushing coupler
collar forward. Turn handle to lower pressure (water
will exit both nozzles). Place detergent pick-up tube
into detergent container. Rinse by turning handle for
high pressure.
STEP 4: With the engine run-
ning, pull trigger to operate
machine. Liquid detergent is
drawn into the machine and
mixed with water. Apply deter-
gent to work area. Do not allow
detergent to dry on surface.
IMPORTANT: You must flush the detergent injec-
tion 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.
8916596-31
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 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. Remove black soap
nozzle from the quick coupler. Select and install the
desired high pressure nozzle. NOTE: You can also stop
detergent from flowing by simply removing detergent
siphon tube from bottle.
WARNING
8916596-7
8916596-32

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL PRESSURE WASHER
10
SHUTTING 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 trig-
ger 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 gas 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 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 gasoline from fuel tank, fuel line, fuel valve
and carburetor.
3. Pour about one teaspoon of engine oil through
spark plug hole, pull starter grip several times and
replace the plug. Then pull the starter grip slowly
until 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 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 storage. Such
additives may be added to gasoline in fuel tank of
the engine, or to 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°F.
STEP 3: Turn engine key switch off
and turn off water.
STEP 1: Remove detergent suction
tube from container and insert into
one (1) gallon of fresh water. Pull
trigger on spray gun and siphon
water for one minute.
8916596-4
STEP 4: Squeeze trigger on spray
gun to relieve remaining pressure.
8916596-3
STEP 5: Remove water supply
hose.
8916596-15
8916596-14
8916596-13
Engine
Key Switch
Burner
Switch
STEP 6: Disconnect high pressure
hose from high pressure outlet.
8916596-33

LANDA PGDC • 8.916-596.0 • REV. 5/13
11
PRESSURE WASHER Troubleshooting Guide
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.
30 amp circuit breaker tripped Push reset button
Bridge rectifier defective Test and replace
12 VDC relay defective Test and replace
(continued on
next page)
Disconnected or short in electrical
wiring
All wire contacts should be clean and tight. No
breaks in wire

LANDA PGDC • 8.916-596.0 • REV. 5/13
PRESSURE WASHER Troubleshooting Guide
12
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.
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 PGDC • 8.916-596.0 • REV. 5/13
13
PRESSURE WASHER Troubleshooting Guide
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 See specifications pages
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 See specifications for proper fuel nozzle.
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 PGDC • 8.916-596.0 • REV. 5/13
PRESSURE WASHER Troubleshooting Guide
14
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
FROM SOURCE
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 PGDC • 8.916-596.0 • REV. 5/13
15
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 the
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. Occasional adjustment of the unloader
may be necessary to maintain correct pressure.
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 Pow-
der (Landa Part #9-028008) 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 rec-
ommended.
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
system with fresh water. Clean out float tank and then
reinstall wand assembly to spray gun.

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL
PRESSURE WASHER
16
MAINTENANCE & SERVICE
Electrode Setting
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.
Beckett Burner Air Adjustment
Machines are preset and performance tested at the
factory - elevation 100’. 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.
To Adjust: Start machine and turn burner ON. Loosen
two locking screws found in the air shutter openings (refer
to illustration) and close air shutter until black smoke ap-
pears from burner exhaust vent. Note air band position.
Next, slowly open the air shutter until white smoke just
starts to appear.Turn air shutter halfway back to the black
smoke position previously noted. Tighten locking screws.
If the desired position cannot be obtained using only the
air shutter, lock the air shutter in as close a position as
can be obtained, then repeat the above procedure on the
air band setting.
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 on page 13).
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 disk ruptures it will need to be replaced.
Fuel
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every
100 hours of operation. Use No. 1 or No. 2 Heating
Oil (ASTM D306) only. NEVER use gasoline in your
burner 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.
Fuel Control System
These machines utilize a fuel solenoid valve located
on the fuel pump to control the flow of fuel to the
combustion chamber. This solenoid valve, which is
normally closed, is activated by a flow switch when
water is flowing through it. When an operator releases
the trigger on the spray gun, the flow of water through
the flow switch stops, turning off the 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 allows for an instantaneous
burn or no burn situation, thereby eliminating high and
low water temperatures, and combustion smoke nor-
mally associated with units incorporating a spray gun.
CAUTION: Periodic inspection is recommended
to insure that the fuel solenoid valve functions
properly. This can be done by operating the ma-
chine and checking to see that when the trigger
on the spray gun is in the off position, the burner
is not firing.
Fuel Pressure Adjustment
To adjust fuel pressure, turn the 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.
8916596-9
5/32" Electrode
1/4"
5/32"
Nozzle
Air Band
Air Shutter
Air Band
Locking Screw
Air Shutter
Locking Screws

LANDA PGDC • 8.916-596.0 • REV. 5/13
17
PRESSURE WASHER OPERATOR’S MANUAL
MAINTENANCE & SERVICE
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 thermostat sensor from
electrical connection.
3. Remove all the fittings from the inlet and discharge
side of coil.
4. Remove the burner assembly from the combustion
chamber.
5. Remove the 3-3/8" bolts from each side of coil and
tank assembly (these bolts are used to fasten tank
to chassis).
6. Remove the two bolts which are underneath the
bottom wrap (to keep the coil from moving.)
7. Remove tank top wrap exposing insulation
and coil.
8. Bend back insulation tabs.
9. Carefully fold back the insulation and remove
insulation retainer plates and coil.
10. Replace or repair coil and any insulation found to
be torn or broken.
11. Reinstall 1/2" pipe nipples into coil.
Coil Reinstallation
Reinstall new or cleaned coil by reversing Steps 9
through 1.
Final Note:
The 12 VDC burner sytems can draw as much as 18
amps! For such motors to run properly, the battery and
engine charging system must be kept in good condition,
and the engine must run fast enough to adequately
charge the battery. Do not throttle down the engine at
any time while the machine is operating.
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 neces-
sary 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
Reference Numbers
Air Band Locking Screws
Air Band
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation,
discontinue 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.

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL
PRESSURE WASHER
18
PREVENTATIVE MAINTENANCE
MAINTENANCE SCHEDULE
Engine Oil
Inspect Daily
Change Every 25 hours
Filter Every 50 hours
Air Cleaner
Inspect Every 50 hours or monthly
Clean Every 3 months
Battery Level Check monthly
Engine Fuel Filter 500 hours or 6 months
Spark Plug Maintenance 500 hours or 6 months
Clean Fuel Tank(s) Annually
Replace Fuel Lines Annually
Pump Oil
(Non-detergent
10/40W)
Inspect Oil level daily
Change After first 50 hours, then every 500 hours or annually
Clean Burner Filter Monthly (More often if fuel quality is poor)
Remove Burner Soot Annually
Burner Adjustment/Cleaning Annually
Replace Burner Nozzle Annually
Descale Coil Annually (More often if required)
Replace High Pressure Nozzle Every 6 months
Replace Quick Connects Annually
Clean Water Screen/Filter Weekly
Replace HP Hose Annually
OIL CHANGE RECORD
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.
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last
Oil Change
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last
Oil Change

LANDA PGDC • 8.916-596.0 • REV. 5/13
19
PRESSURE WASHER OPERATOR’S MANUAL
91
GAS
8.916-274.0
DIESEL
8.932-960.0
EXPOSEDPULLEYS AND
BELTSCAN CAUSE INJURY
PRECAUCION/AVERTISSEMENT
WARNING
8916596-12
EXPLODED VIEW
66
84
9
58
65
81
33
5
78
61
4
59
54
60
55
72
36
37
42
1
2
35
21
20
19
24
76
74
12
8
50
51
43
12
44
73
67, 68,
69, 70
82
32
29
26
86
28
31
27
16
14
11
12
67
53
23
76
15
10
24
4
4
3
7
34
52
28
18
47
17
79
25
77
85
62
39 57
75
38
12
80
36
46
22 48
49
13
71
56, 63
45
85
41
30
28
88
87
64
83
89
88
87
91
92
90
87
91
85
87
45

LANDA PGDC • 8.916-596.0 • REV. 5/13
OPERATOR’S MANUAL
PRESSURE WASHER
20
EXPLODED VIEW PARTS LIST
ITEM PART NO. DESCRIPTION QTY
1 8.706-604.0 Tank, Fuel, 5 Gal., Red
1.110-050.0, 1.110-051.0 1
2 8.706-603.0 Tank, Fuel, 10 Gal. Poly Yellow 1
3 8.921-148.0 Strap, Fuel Tank Single
1.110-049.0 2
1.110-050.0, 1.110-051.0 1
4 9.802-193.0 Gasket, Neoprene 7"
1.110-049.0 2
1.110-050.0, 1.110-051.0 3
5 9.802-053.0 Bushing,
Rubber, Nitrile
1.110-049.0 2
1.110-050.0, 1.110-051.0 3
6 9.802-054.0 Elbow, Fuel Tank, Zinc 1
7 8.706-496.0 Diptube Assy, Plastic, 17.5"
1.110-049.0 1
1.110-050.0, 1.110-051.0 2
8 8.912-192.0 Top Wrap, Stainless Steel 1
9 9.802-071.0 Trim, 750 B2 x 1/16 Black 33"
10 9.800-002.0 Label, Use Only Kerosene 1
11 9.800-006.0 Label, Warning, Hot/Caliente
w/Arrows 1
12 6.390-126.0 Hose Clamp
1.110-049.0 7
1.110-050.0, 1.110-051.0 9
13 8.706-727.0 Bushing, 5/16", Snap Lok 1
14 8.918-426.0 Hose, 3/8" x 32", 2 Wire
Pressure LO 1
15 8.918-425.0 Hose, 3/8" x 29", 2 Wire,
Pressure LO 1
16 9.802-781.0 Nut, 3/8" Whiz 6
17 8.718-980.0 Washer, 5/16" Flat, SAE 23
18 9.802-776.0 Nut, 5/16" ESNA, NC 23
19 9.802-261.0 Hose, 3/4" 39"
20 9.802-728.0 Threaded Bolt 3/8" x 2" 2
21 9.802-779.0 Nut, 3/8" 2
22 9.802-807.0 Washer, Flat, 3/8" 2
23 9.802-259.0 Hose, 1/2" Push-on 24"
24 9.802-151.0 Swivel, 1/2" JIC FEM Push-on 2
25 8.707-020.0 1/2" MPT x 3/4" Barb 1
26 8.900-839.0 Label, PGDC Skid Warning 1
27 9.802-152.0 Swivel,
3/4" SAE Fem, Push-on 1
28 9.802-767.0 Screw,
3 /8" x 3/4" HH,
NC, Whiz
13
29 8.718-674.0 Bolt, 3/8-16 x 2-1/4", GR8.2
Serated Flange B 2
30 8.752-918.0 Clamp, Hose #64SS 1
31 9.802-781.0 Nut, 3/8" Flange Whiz Loc NC 2
32 8.706-600.0 Battery, M-100, Large 1
ITEM PART NO. DESCRIPTION QTY
33 8.916-471.0 Assy, Power Platform
PGDC5-3500 1
34 8.932-992.0 Mount, Rubber Vibration. 3/8"
70 Duro 9
35 8.920-485.0 Wlmt, Skid, PGDC 1
36 9.802-089.0 Cap, Tank
1.110-049.0 1
1.110-050.0, 1.110-051.0 2
37 9.800-001.0 Label, This Tank for Gas Only 1
38 8.920-295.0 Support, Coil, Skid 1
39 8.707-000.0 Connector, 1/2" Anchor 1
40 9.802-781.0 ▲ Nut, 3/8 Flange Whiz 8
41 9.802-797.0 Screw,
#10 x 1/2" Hex Head SS 1
42 9.802-064.0 Grommet, Rubber Nozzle
Holder 4
43 8.932-960.0 Label, Diesel, Black on Yellow 1
44 8.916-274.0 Label, Gas, White on Red 1
45 8.920-352.0 Retainer, Fuel Line 4
46 8.900-266.0 Label, Nozzle 1
47 9.802-753.0 Screw, 1/4" x 3/4" 2
48 9.800-975.0 Label, Landa Logo 4.75 x 21" 1
49 9.803-277.0 Screw, 5/16 x 1/2 Whiz Loc 4
50 8.916-443.0 Wlmt, Back Electrical, PGDC 1
51 9.802-514.0 Strain Relief, LT., Str., 1/2 NPT
.23-45D 2
52 9.802-525.0 Locknut, 1/2" 8463 2
53 8.916-619.0 Panel, PGDC 1
54 9.802-428.0 Cord, Service SJOWA 12/3 30"
55 9.802-765.0 Screw, 1/4" x 1/2" 4
56 8.932-968.0 Label, Intended For Outdoor,
Use, USA 1
57 9.802-146.0 Swivel, 1/2" MP x 3/4" GHF 1
58 9.800-040.0 Label, Ground Symbol 1
59 9.802-695.0 Nut, 10/32" Keps 4
60 9.802-762.0 Screw, 10/32" x 1-1/4"
RH, SL, Blk 1
61 9.802-802.0 Washer, 1/4", FLAT, SAE 4
62 8.718-781.0 Screw, 40mm, Pan HD 1
63 9.800-034.0 Label, Clear Lexan, 4.3" x 5.5" 1
64 8.751-215.0 Grommet, Remote Vent 1
65 8.709-089.0 Clamp, "Wire/Tube .6250" 1
66 8.706-735.0 Bushing, 1-1/4" Snap 1
67 8.712-353.0 Nozzle, SAQCMEG 0005, Red 1
68 8.712-354.0 Nozzle,
SAQCMEG 1505Yellow 1
69 8.712-355.0 Nozzle,
SAQCMEG 2505 Green 1
70 8.712-356.0 Nozzle,
SAQCMEG 4005 White 1
71 8.706-744.0 Plug, Plastic, 1" 1