Kärcher HD 3.0/30 Pb User manual

9.807-623.0
MODEL ORDER #
HD 3.0/30 Pb 1.575-152.0
HD 3.7/35 Pb 1.575-154.0
HD 3.0/40 Pb 1.575-155.0
OPERATOR’S MANUAL
To locate your local Kärcher Commercial Pressure Washer Dealer nearest you,
visit www.karchercommercial.com

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.
9.807-623.0 • Rev. 10/15
Introduction & Important Safety Information .........................................3-4
Component Identification......................................................................... 5
Assembly Instructions.............................................................................. 6
Operating Instructions...........................................................................7-8
Detergents & Cleaning Techniques.......................................................... 9
Shut Down and Clean-Up...................................................................... 10
Storage .................................................................................................. 10
Troubleshooting ..................................................................................... 11
Adjusting Unloader Valves ..................................................................... 11
Preventative Maintenance ..................................................................... 12
Oil Change Record ................................................................................ 12
Models 152.0, 154.0,155.0 Exploded View............................................ 13
Models 152.0, 154.0, 155.0 Exploded View Parts List ......................... 14-15
Specifications....................................................................................16-17
Hose and Spray Gun Assembly............................................................. 18
VRT3 Unloader Exploded View and Parts List....................................... 19
UU1 Unloader Exploded View and Parts List ........................................ 20
KM.3 Pump Exploded View and Parts List .......................................21-22
KD.1 Pump Exploded View and Parts List ........................................23-24

9.807-623.0 • Rev. 10/15
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 follow
instructions could cause mal-
function of the machine and
result in death, serious bodily
injury and/or property dam-
age.
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.
4. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling distributor for specific details.
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.
5. Avoid installing machines in
small areas or near exhaust
fans. Exhaust contains poi-
sonous carbon monoxide
gas; exposure may cause loss
of consciousness and may
lead to death. It also contains
chemicals known, in certain quantities, to cause
cancer, birth defects or other reproductive harm.
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
WARNING: Risk of fire. Do not
add fuel when the product is
operating.
WARNING: Risk of explosion —
do not spray flammable liquids.
6. Do not place machine near
flammable objects as the en-
gine is hot.
WARNING:This product contains
chemicals known to the state of California to cause
cancer and birth defects or other reproductive harm.
Operation of this equipment may create sparks that
can start fires around dry vegetation. A spark arres-
tor may be required. The operator should contact:
Local fire agencies for laws or regulations relating
to fire prevention requirements.
7.Allow engine to cool for 1-2 minutes before refueling. 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.
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. Transport/repair with fuel tank EMPTY or with fuel
shut-off valve OFF.

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
4
IMPORTANT SAFETY INFORMATION
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.
9. Do not spray water on or near
electrical components.
RISK OF EXPLOSION:
DO NOT SPRAY
FLAMMABLE
LIQUIDS.
WARNING
WARNING: Flammable liquids
can create fumes which can ig-
nite, causing property damage
or severe injury.
WARNING: Risk of explosion —
Do not spray flammable liquids.
10. Keep operating area clear of
all persons.
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.
11. Eye, hand, and foot protection
must be worn when using this
equipment.
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.
12. 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.
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.
13. Never make adjustments on
machine while in operation.
14. Be certain all quick coupler fittings are secured
before using pressure washer.
WARNING
PROTECT FROM
FREEZING
WARNING: Protect machine from
freezing.
15. 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.
16. 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.
17. Do not overreach or stand on
unstable support. Keep good foot-
ing and balance at all times.
18. Do not operate this machine when fatigued or under
the influence of alcohol, prescription medications,
or drugs.
19. Inlet water must be clean fresh water and no hotter
then 90°F.
20. Manufacturer will not be liable for any changes
made to our standard machines or any components
not purchased from us.
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.
Follow the maintenance instructions
specified in the manual.

9.807-623.0 • Rev. 10/15
5
PRESSURE WASHER
OPERATOR’S MANUAL
COMPONENT IDENTIFICATION
Pump — Develops high pressure.
Starter Grip— Used for starting the engine manu-
ally.
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.
High Pressure Hose — Connect one end to water
pump discharge nipple (detergent injector nipple) and
the other end to spray gun.
Note:If trigger on spray gun is released for more
than 1-2 minutes, water may leak from pump protec-
tor.Warm water will discharge from pump protector
onto floor. This system prevents internal pump
damage from high temperatures.
Starter Grip
High Pressure
Hose
Pump
Straight
Through
Wand
Garden Hose
(not included)
Inlet
Screen
Unloader
Detergent
Bucket (not
included)
Detergent
Injector
Pump Protector
Pressure
Nozzle

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
6
STEP 1: Attach the handle to the
frame of the pressure washer. Note:
It may be necessary to move the
handle supports from side to side
in order to align the handle so it will
slide over the frame supports.
STEP 2: Insert the carriage bolt
through the holes from the outside
of the unit and attach a nut from
the inside of the machine. Tighten
nuts.
STEP 3: Attach the spray gun/hose
storage handle, and bracket to
handle. Tighten nuts.
STEP 4: Attach the high pressure
hose to the spray gun using teflon
tape on hose threads.
STEP 6: Release the coupler col-
lar and push the nozzle and the
collar until the collar clicks or locks.
Pull the nozzle to make sure it is
secure.
STEP 7: Connect high pressure
hose to pump discharge fitting.
Push coupler collar forward until
secure.
STEP 5: Pull the spring-loaded
collar of the wand coupler back
to insert your choice of pressure
nozzle.
STEP 8: Connect garden hose to a
clean cold water source and open
supply valve completely. NEVER
use hot water.
ASSEMBLY INSTRUCTIONS
STEP 9: Connect the garden hose to pump water inlet.
Inspect inlet screen. CAUTION: Do not run the pump
without water or pump damage will result.
Alignment
Holes
Handle
Frame
Assy.
Carriage
Bolt
Nut
Studs
Nut
Hose/Spray Gun
Storage Bracket
Safety
Latch
Spray
Gun
High Pressure
Hose
Wand
Coupler
Pressure
Nozzle
Pressure
Nozzle Wand
Coupler
Wand
Collar
Pump
Discharge
Fitting
High Pressure Hose Cold
Water
Source
Garden
Hose
Pump
Water Inlet
Garden
Hose
Coupler
Collar
Bolts
Washer
Inlet Screen

9.807-623.0 • Rev. 10/15
7
PRESSURE WASHER
OPERATOR’S MANUAL
STEP 1: Check engine oil level. Oil level should be level with the bottom
of the oil filler neck. Be sure the machine is level when checking the oil
level. (Refer to the engine's operating manual included with machine.) We
recommend that the oil be changed after the first 5 hours of use, then once
every 50 hours. Note: Improper oil levels will cause low oil sensor to shut
off engine. IMPORTANT! Do not run engine with high or low oil levels
as this will cause engine damage.
STEP 2: Remove shipping cap and
install oil dipstick. Check pump oil
level by using dipstick or observe oil
level in oil window (if equipped). Use
30 wt. (non detergent) oil.
STEP 5: Move the fuel shut-off valve to the "On" posi-
tion. When the engine is not in use, leave the fuel valve
in the "OFF" position.
STEP 4: Trigger the spray gun to
eliminate trapped air then wait for a
steady flow of water to emerge from
the spray nozzle.
OPERATING INSTRUCTIONS
STEP 3: Fill gas tank with unleaded
gasoline. Do not use leaded gaso-
line.
STEP 6: Move the choke lever to the "Choke" position
(on a warm engine, leave the choke lever in the run
position). Move the choke lever to the "Closed" position.
To restart a warm engine, leave the choke lever in the
"Open" position.
Engine Oil
Dipstick
Pump Oil
Dipstick
Oil Window
Gas
Tank
Choke
Lever
Fuel
Valve
Choke
Fuel
Valve

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
8
STEP 7: Turn the engine switch to "On" position.
On Briggs engines, move the throttle lever to "Fast"
position, shown on engine as a rabbit.
STEP 8: Pull the starter grip. If the engine fails to start
after 2 pulls, squeeze the trigger gun to release pressure
and repeat step. Return starter gently. After the engine
warms up enough to run smoothly, move choke to run
position and throttle to fast position.
CAUTION: Small engines may kick back. Do not hold
pull starter grip tightly in hand.
OPERATING INSTRUCTIONS (CONT.)
The five color-coded quick connect nozzles provide a wide array of
spray widths from 0° to 40° 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. To apply de-
tergent select the black nozzle.
WARNING! Never replace
nozzles without engaging the
safety latch on the spray gun
trigger.
NOZZLES
Safety
Latch
On-Off
Switch

9.807-623.0 • Rev. 10/15
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: Connect detergent injector to discharge
nipple on machine. Connect high pressure hose to
injector with quick coupler. (Check to make sure lock-
ing couplers are in proper position before applying
water pressure).
STEP 2: Use detergent designed
specifically for pressure wash-
ers. Household detergents could
damage the pump. Prepare de-
tergent 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 3: With safety latch on spray
gun engaged, secure black detergent nozzle into quick
coupler.
NOTE: Detergent cannot be applied using red, yellow,
green or white nozzles.
STEP 4: With the engine run-
ning, pull trigger to operate ma-
chine. 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 the engine on your pressure washer for 1-2
minutes without pressing the trigger on the spray gun,
circulating water in the pump can reach high tempera-
tures. When the water reaches this temperature, the
pump protector engages and cools the pump by dis-
charging 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 al-
low 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 damage. If
no damage is found, continue to pressure wash-
ing.
CAUTION - Never use:
• Bleach, chlorine 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 dam-
age 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
DETERGENTS & GENERAL CLEANING TECHNIQUES
Detergent
Injector
Discharge
Nipple
High Pressure
Hose

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
10
SHUTTING DOWN AND CLEAN-UP
STEP 1: Remove detergent suc-
tion tube from container and insert
into one gallon of fresh water. Slide
nozzle forward for low pressure or to
connect black detergent nozzle into
wand quick coupler. Pull trigger on
spray gun and siphon water for one
minute.
STEP 2: Turn off the engine. STEP 3: Turn off wa-
ter supply.
STEP 5: Disconnect the gar-
den hose from the water inlet
on the machine.
STEP 6: Disconnect the high
pressure hose from high pres-
sure outlet.
STEP 7: Engage
the spray gun safety
lock.
STEP 4: Press trigger
to release water pres-
sure.
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 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 gasoline 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
slowly until you feel increased pressure which in-
dicates 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 main-
tenance of the engine.
STORAGE
Pump Water
Inlet
High Pressure
Outlet
Safety Latch
On-Off
Switch

9.807-623.0 • Rev. 10/15
11
PRESSURE WASHER Troubleshooting Guide
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.
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.
TROUBLESHOOTING
Unloader valves are preset and tested at the factory
before shipping. Occasional adjustment of the unloader
may be necessary to maintain correct pressure.
Start with the valve set at its lowest spring tension. Raise
pressure by turning adjusting knob clockwise until pres-
sure is at the desired position. Do not overtighten.
ADJUSTING UNLOADER VALVES
Open and close spray gun to be sure pressure is correct.
Raise or lower pressure by adjusting the knob.
Do not by-pass more than 1-2 minutes when by-passing
to the suction side of the pump.

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
12
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 dealer for
maintenance. Regular preventative maintenance will add many hours to the life of your pressure washer. Perform
maintenance more often under severe conditions.
Maintenance Operation Every 8 Hrs
or Daily
25 Hrs or
Weekly
50 Hrs or
Monthly
100 Hrs or
Yearly
Yearly
Check Oil Pump X
Engine X
Change Oil Pump X
Engine X
Air Cleaner Check Clean
Spark Plug X
Check Valve Clearance X
Fuel Tank Filter X
Water Filter/Clean Check X
Date Oil Changed
Month/Day/Year
No. of Operating Hours
Since Last Oil Change
Brand Name and
Type of Oil (see above)
OIL CHANGE RECORD
Check pump oil and engine oil level before first use of your new pressure washer.

9.807-623.0 • Rev. 10/15
13
PRESSURE WASHER
OPERATOR’S MANUAL
“Thisproduct contains chemicals knownto the State of
Californiato cause cancer and birth defects or other
reproductiveharm.Operation of This Equipment May
CreateSparksThatCan StartFires Around Dry Vegetation.
ASpark ArrestorMay be Required.The OperatorShould
ContactLocal FireAgencies for Laws or Regulations
Relatingto Fire Prevention Requirements.”
WARNIN G
8.917-015.0
EXPLODED VIEW - 1.575-152.0,154.0,155.0
17
18
9
10
11
12
10
11
16 13
15
31
19
27
29
6
28
30
1
59
58
58
2
3
4
6
5
57
40
41
42
45
43
39
38
37
32
36
32
35
44
34
49
51
25
24
60
61
54
11
14
47
52
50
48
23
56
55
59
22
21
53
11 20
10
63
33
58
58
20
46
28
28
28
62
61
60 61
60
6
58
59
57
11
10
58
59
64
65
66
69
7
91
67
8
10
11
22
21
68
70
70
73
76
43
81
72
75 74
89
41
45
44
77
88
87
82
78
84
79
26
80
Pump
155.0
39
38
36
37
32
Pump
152.0
90
42

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
14
EXPLODED VIEW PARTS LIST - 1.575-152.0,154.0,155.0
ITEM PART NO. DESCRIPTION QTY
1 9.802-064.0 Grommet, Rubber, 5
Nozzle Holder
2 8.920-262.0 Handle, Grab, Chrome 1
3 9.800-723.0 Label, Cold Water Handle 1
4 9.803-126.0 Plate, Warning/Instruction, Black 1
5 9.803-098.0 Hanger, Hose/Wand 1
6 9.802-706.0 Bolt, Carriage, 1/4"-20 x 1-3/4", 6
Zinc
7 9.800-110.0 Label Karcher Logo 1
8 9.802-778.0 Nut, 5/16" Whiz Loc Flange 2
9 8.920-261.0 Handle, Lower Grab, Chrome 1
10 9.197-003.0 Nut, 3/8" ESNA, NC 10
11 9.802-807.0 Washer, 3/8" SAE, Flat 14
12 9.803-114.0 Retainer Bracket, Handle, Black 2
13 9.802-728.0 Bolt, 3/8" x 2" NC, HH 4
14 9.802-727.0 Bolt, 3/8" x 1-3/4", Tap 4
15 9.802-817.0 Washer, 3/8" x 1", Steel 2
16 9.802-066.0 Pad, Soft Rubber 2
17 9.802-782.0 Collar, 5/8" Bore Shaft, 3010 2
18 8.754-435.0 Wheel & Pu Tire Assy, 12"
Steel Rim (152.0,154.0,155.0) 2
19 9.803-115.0 Frame Assy, Large, Black 1
(152.0,154.0,155.0)
20 9.802-712.0 Bolt, 5/16" x 1-3/4", NC, 4
Carriage, Zinc
21 9.802-776.0 Nut, 5/16", ESNA, NC 4
22 8.718-980.0 Washer, 5/16" Flat, SAE 4
23 8.911-226.0 Axle, 5/8" x 27" L 1
(152.0,154.0,155.0)
24 8.917-893.0 Assy Black, Slider Pump / Belt 1
Guard Mount (152.0,154.0,155.0)
25 8.917-886.0 Plate, Belt Guard Front Cover 1
26 Hose and Spray Gun, See Assy Page
27 9.803-118.0 Bracket, Take Up, CW, Black 1
28 9.802-700.0 Screw, 1/4" x 3/4" HH NC 8
29 9.802-809.0 Washer, 1/2", Flat, SAE 1
30 9.802-740.0 Bolt, 1/2" x 3-1/2" HEX 1
31 9.802-730.0 Bolt, 3/8" x 2-1/4", HH 2
32 6.390-126.0 Clamp, Hose, .46-54 ST 2
33 9.802-813.0 Washer, 5/16" Lock (152.0) 4
9.802-816.0 Washer, 7/16" Lock, Split 4
(154.0,155.0)
34 9.802-225.0 Injector Assy., Detergent, 1
Non-Adj, 3-5 GPM, 0.083
35 9.802-254.0 Hose, 1/4", Push-On, 1 ft.
Fuel Line (All except 155.0)
36 8.706-958.0 Barb, 1/4" Barb x 1/4" ML Pipe, 1
90° (All Except 155.0)
ITEM PART NO. DESCRIPTION QTY
37 8.706-955 Hose Barb, 1/4" Barb x 1/8" 1
ML Pipe, 90°
(All Except 155.0 & 154.0)
8.706-940.0 Hose Barb, 1/4" Barb x 1/8" 1
ML Pipe (154.0)
38 9.802-190.0 Valve, E-Z Start, 1
3/8" MPT x 1/8" FPT
9.804-065.0 Valve, E-Z Start, 1
1/4" MPT x 1/8" FPT (152.0)
39 8.706-207.0 Elbow, 3/8", Street 1
8.706-200.0 Elbow, 1/4", Street (152.0) 1
40 9.804-025.0 Pump Protector, 1/4"PTP 1
(152.0)
8.707-256.0 Pump Protector, 1/2"PTP 1
140DEG, P/N 1005 (154.0)
41 Pump, See Specifications Pages
42 Unloader, See Specifications Pages
43 9.802-171.0 Nipple, 3/8" x 3/8" NPT ST Male 1
44 9.802-146.0 Swivel, 1/2" MP x 3/4" GHF 1
w/Strainer
45 9.802-163.0 Strainer, 1/2" PA, Inline Plastic 1
46 9.800-008.0 Label, Danger Cool Engine 1
47 Engine, See Specifications Pages
48 Engine Pulley, See Specifications Pages
49 Engine Bushing, See Specifications Pages
50 Belts, See Specifications Pages
51 Pump Bushing, See Specifications Pages
52 Pump Pulley, See Specifications Pages
53 8.920-263.0 Handle, Bumper, Chrome 1
54 9.800-006.0 Label, Hot/Caliente w/Arrows, 1
Warning
55 8.932-968.0 Label, Intended For Outdoor Use 1
56 9.800-034.0 Label, Clear Lexan 1
57 8.712-337.0 Nozzle, 0003.5, Red (152.0) 1
8.712-338.0 Nozzle, SAQCMEG 1503.5, 1
Yellow (152.0)
8.712-339.0 Nozzle, SAQCMEG, 2503.5, 1
Green (152.0)
8.712-340.0 Nozzle, SAQCMEG 4003.5, 1
White (152.0)
8.712-350.0 Nozzle, SACQMEG, 0004.5, 1
Red (154.0)
8.712-360.0 Nozzle, SAQCMEG 1504.0, 1
Yellow (154.0)
8.712-370.0 Nozzle, SAQCMEG, 2504.0, 1
Green (154.0)
8.712-380.0 Nozzle, SAQCMEG 4004.0, 1
White (154.0)
8.712-331.0 Nozzle, SACQMEG, 0003 1
Red(155.0)
8.712-333.0 Nozzle, SAQCMEG 1503.0, 1
Yellow (155.0)
8.712-334.0 Nozzle, SAQCMEG, 2503.0, 1
Green (155.0)
8.712-335.0 Nozzle, SAQCMEG 4003.0, 1
White(155.0)

9.807-623.0 • Rev. 10/15
15
PRESSURE WASHER
OPERATOR’S MANUAL
EXPLODED VIEW PARTS LIST - 1.575-152.0,154.0,155.0
ITEM PART NO. DESCRIPTION QTY
58 9.802-802.0 Washer, 1/4" Flat 10
59 9.802-773.0 Nut, 1/4" ESNA 8
60 8.718-980.0 Washer, 5/16" Flat 4
61 9.802-776.0 Nut, 5/16" ESNA 4
62 9.802-802.0 Washer, 1/4" Flat, SAE 6
63 9.802-741.0 Bolt, 8mm x 16mm Hex (152.0) 4
9.802-744.0 Bolt, 10mm x 20mm 4
(154.0,155.0)
64 8.706 -860.0 Tee, 1/2" Branch (155.0) 1
8.706-854.0 Tee, 1/4" Branch (152.0) 1
65 8.706-984.0 Adapter, 1/2" x 1/2" (152.0) 1
66 9.800-049.0 Label, Manufacturer's Cleaning 1
Solution
67 9.802-959.0 Key, .247 Sqr. x 2.125" 1
68 9.802-311.0 Nozzle, Compl., Detergent 1
69 9.800-036.0 Label, Warning, Pictoral, Small 1
70 8.718-980.0 Washer, 5/16" Flat (152.0) 4
9.802-807.0 Washer, 3/8" Flat (155.0) 4
71 8.750-300.0 Unloader, VRT3 Ez Start (155.0) 1
72 9.802-870.0 Block, Unloader, 1
3/8" x 3/8" 1.25 Steel (155.0)
73 9.802-728.0 Bolt, 3/8" x 2", NC HH (155.0) 2
74 9.802-807.0 Washer, 3/8" SAE, Flat (155.0) 2
75 9.197-003.0 Nut, 3/8" ESNA NC (155.0) 2
76 8.705-974.0 Nipple, 3/8" Hex Steel (155.0) 1
77 9.802-129.0 Elbow, 3/8" x 1/2" JIC (155.0) 1
78 8.706-860.0 Street Tee, 1/2" (155.0) 1
79 9.802-128.0 Nipple, 1/2" x 1/2" JIC (155.0) 1
80 9.802-259.0 Hose, Push-on 1/2" (155.0) 15"
81 8.707-254.0 Pump Protector, 3/8" PTP 1
(155.0)
82 9.802-036.0 Nipple, 1/2" JIC, 3/8" Pipe 1
(155.0)
83 9.802-810.0 Washer, 5/8" Flat 2
84 9.802-151.0 Swivel, 1/2" JIC, Female, 2
Push-On (155.0)
85 9.802-959.0 Key, .247" Sqr. x 2.125" 1
86 9.800-036.0 Label, Warning, Pictoral, Small 1
87 9.802-039.0 Elbow, 1/2" JIC, 3/8", 90° 1
(155.0)
88 8.918-422.0 Hose, 3/8" x 20", 2 Wire, 1
Pressure Loop (155.0)
89 8.706-829.0 Elbow, 1/2"" Street, Brass 1
90 8.751-096.0 Label Regulation 4442.6 1
91 8.917-889.0 Plate, Belt Guard Back Cover 1
8.920-542.0 Black Plate Belt Guard (152.0) 1
▲Not Shown

9.807-623.0 • Rev. 10/15
OPERATOR’S MANUAL PRESSURE WASHER
16
Model GPM
Pressure
(PSI)
Nozzle
Size Pump
Pump
Part No.
Unloader
Part No. Engine
Engine
Part No.
Pump
Pulley
Pump Pulley
Part No.
1.575-152.0 3.0 3000 3.5 KD3030 9.804-006.0 9.175-018.0 GX270 (270cc) 8.750-680.0 2BK80 9.802-389.0
1.575-154.0 3.7 3500 4.0 KM4035R.3 8.751-189.0 9.175-018.0 GX390 (390cc) 8.750-580.0 2BK90H 8.715-593.0
1.575-155.0 3.0 4000 3.0 KM3540R.3 8.751-186.0 8.750-300.0 GX390 (390cc) 8.750-580.0 2BK80H 9.802-389.0
SPECIFICATIONS

9.807-623.0 • Rev. 10/15
17
PRESSURE WASHER Specifications
Model
Pump
Bushing
Bushing Part
No.
Engine
Pulley
Pulley
Part No.
Engine
Bushing
Bushing
Part No.
Belt
Size
Belt
Part No.
1.575-152.0 24MM 9.802-402.0 2BK40H 9.802-384.0 HX1" 9.802-398.0 BX38 (2) 9.802-417.0
1.575-154.0 24MM 9.802-402.0 2BK32H 9.802-381.0 HX1" 9.802-398.0 BX39 (2) 9.802-418.0
1.575-155.0 24MM 9.802-402.0 2BK40H 9.802-384.0 HX1" 9.802-398.0 BX38 (2) 9.802-417.0
SPECIFICATIONS

9.807-623.0 • Rev. 10/15
PRESSURE WASHER Specifications
18
HOSE & SPRAY GUN ASSEMBLY PARTS LIST
HOSE & SPRAY GUN ASSEMBLY
ITEM PART NO. DESCRIPTION QTY
1 9.802-219.0 Wand Assy., Side Grip w/1/4" Coupler, 35-1/2" 1
2 8.710-384.0 Gun, St-1500, 5000 PSI, 10.4 Gpm 1
3 9.802-164.0 Coupler, 1/4” Female, Brass 1
4 Nozzle, See Breakdown for Part Numbers
5 8.739-125.0 Hose, 3/8" x 50', 1 Wire, Tuff-Flex, (150.0, 151.0, 152.0) 1
8.739-203.0 Hose, 3/8" x 50', 2 Wire,Tuff-Flex (154.0, 155.0) 1
6 9.802-166.0 Coupler, 3/8" Female, Brass 1
7 9.802-216.0 Injector, Chemical, Non-Adjust, 3-5 GPM, .083 1
8 6.390-126.0 Clamp, Hose 2
9 9.802-251.0 Tube, 1/4" x 1/2" Clear Vinyl 6 ft.
10 8.707-057.0 TStrainer, Plastic, 1/4" Hose Barb 1
11 9.802-170.0 Nipple 3/8 x 3/8 NPT Fem (155.0 Only) 1
12 9.802-169.0 Coupler 3/8" Male Brass (155.0 Only) 1
3
4
1
2
5
6
10
8
9
7
11
12

9.807-623.0 • Rev. 10/15
19
PRESSURE WASHER
OPERATOR’S MANUAL
8.750-300.0, 8 GPM, 4500 PSI EZ Start
VTR3 UNLOADER EXPLODED VIEW AND PARTS LIST
Unloader Adjustment Procedures
1. Remove lock nut (Item 19).
2. Remove adjustment knob (Item 24).
3. Loosen the two (2) nuts (Item 20), move them upward on stem (Item 3) until you see 4 or more threads below the nut.
4. Re-attach adjusting knob (Item 24).
5. Start machine. Open the trigger of the spray gun. Increase pressure by turning adjustment knob (Item 24) clockwise until
pressure is at the desired operating pressure.
6. Remove the adjustment knob (Item 24), tighten the lower nut (Item 20) tightly against the upper nut (Item 20). Re-attach
adjustment knob (Item 24) and screw down until contact is made with the nuts (Items 20). Screw down lock nut (Item
19) onto the stem (Item 3) until the threads cut into the nylon insert of the lock nut (Item 19).
*If adjustment knob (Item 24) DOES NOT make contact with upper nut (Items 20), remove adjusting knob (Item 24), re-adjust
(raise) nuts (Items 20) on stem (Item 3) and re-attach adjustment knob (Item 24), then repeat step #6.
**If adjustment knob (Item 24) DOES make contact with upper nut; release the trigger of the spray gun and watch the pres-
sure gauge for the pressure increase (“spike”). This “spike” SHOULD NOT exceed 500 psi above the operating pressure. If
“spike” pressure exceeds the 500 psi limit, remove the adjusting knob (Item 24) and re-adjust (lower) the nuts (Items 20) on
the stem (Item 3). Re-attach the adjusting knob (Item 24), then repeat step #6.
1
3
5
2
4
6
7
9
11
8
10
12
13
15
17
14
16
18
19
20
22
20
21
23
24
25
1
10
ITEM PART NO. DESCRIPTION QTY
14 8.750-712.0 Outlet Fitting 1
24 8.750-713.0 Knob, Unloader 1
8.750-710.0 Repair Kit, VRT3, 4500 PSI
(Kit Items: 1, 4, 8-12, 16, 21-22)

9.807-623.0 • Rev. 10/15
21
PRESSURE WASHER
OPERATOR’S MANUAL
ITEM PART NO. DESCRIPTION QTY
1 8.751-216.0 Crankcase 1
2* See Kits Below Plunger Oil seal 3
3*
See Kits Below O-Ring Ø1.78 x 31.47 3
4*
See Kits Below Pressure Ring 3
5*
See Kits Below U-Seal 3
6*
See Kits Below Intermediate Ring 3
7*
See Kits Below U-Seal 3
8 9.803-199.0 Washer, Copper 1
9
9.802-926.0 Plug, Brass 1/2 1
10 8.751-218.0 Manifold Head 1
11*
See Kits Below O-Ring Ø2.62 x 17.13 6
12*
See Kits Below Valve Assembly 6
13*
See Kits Below O-Ring Ø2.62 x 20.29 6
14 9.802-928.0 Valve Plug 6
15 9.802-938.0 Manifold Stud Bolt 8
16 9.802-884.0 Washer 16
17 9.803-198.0 Copper Washer 3/8 1
18 9.802-925.0 Brass Plug 3/8 2
ITEM PART NO. DESCRIPTION QTY
23 9.802-944.0 Hexagonal Screw 8
24 8.717-210.0 Closed Bearing
Housing 1
25 9.803-192.0 O-Ring Ø1.78 x 60.05 2
26 8.933-011.0 Tapered Roller Bearing 2
27 9.803-146.0 Crankshaft (3540) 1
9.803-147.0 Crankshaft
(4035) 1
28 9.803-167.0 Crankshaft Key 1
29 9.802-921.0 Oil Dip Stick 1
30 9.803-140.0 Crankshaft Seal 1
31 9.803-178.0 Shim 2
32 8.717-209.0 Bearing Housing 1
33*
See Kits Below Plunger Nut, M8 3
34*
See Kits Below Copper Spacer 3
35*
See Kits Below Plunger (4035) 3
Plunger (3540) 3
36* See Kits Below Copper Spacer 3
37*
See Kits Below O-Ring Ring 3
38*
See Kits Below Teflon Ring 3
39
9.803-144.0 Plunger Rod 3
TORQUE
SPECS
Item # Ft.-lbs
14 75
15 30
23 8
33 9
43 13
48 7.6
8.751-189.0 KM4035R.3
8.751-186.0 KM3540R.3
KM.3 SERIES PUMP EXPLODED VIEW
KM.3 SERIES PUMP EXPLODED VIEW PARTS LIST