OPERATOR’S MAN U AL

MODEL #

HD 3.0/27 G

HD3.0/27 GB

HD 3.4/35 G

HD 3.3/35 GB

HD 4.0/40 G

HD 4.0/40 GB

HD 4.0/40 Ge

HD 4.0/40 GeB

ORDER #

1.107-270.0

1.107-271.0

1.107-272.0

1.107-273.0

1.107-274.0

1.107-275.0

1.107-276.0

1.107-277.0

KNA, Inc.4555 Airport Way Denver, CO 80239

9.801-759.0

Important Safety Information ................................................................ 4-6

Component Identifi cation ......................................................................... 7

Assembly Instructions .............................................................................. 8

Operating Instructions......................................................................... 9-10

Detergent and General Operating Techniques ...................................... 11

Shut Down and Clean-Up ...................................................................... 12

Storage .................................................................................................. 12

Troubleshooting (Models: HD 3.0/27 G, HD 3.4/35 G, HD 4.0/40 G,

HD 4.0/40Ge) ............................................................................... 13-14

Preventive Maintenance (Models: HD 3.0/27 G, HD 3.4/35 G,

HD 4.0/40 G, HD 4.0/40Ge) .............................................................. 15

Troubleshooting (Models: HD3.0/27 GB, HD 3.3/35 GB,

HD 4.0/40 GB, HD 4.0/40 GeB) .................................................. 16 - 17

Preventive Maintenance (Models: HD3.0/27 GB, HD 3.3/35 GB,

HD 4.0/40 GB, HD 4.0/40 GeB) ......................................................... 18

Accerssories and Parts list .................................................................... 19

Oil Change Record ................................................................................ 20

CONTENTS

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.

• 9.801-759.0 • Rev. 11/15

3

4

INTRODUCTION & IMPORTANT SAFETY INFORMATION

Thank you for purchasing this Pressure Washer.

We reserve the right to make changes at any time without incurring any obligation.

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 specifi c details.

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 fl uent 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.

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.

WARNING

EAR PROTECTION

MUST BE WORN

WARNING: This machine exceeds 85 db appropriate ear protection must be worn.

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 instructions carefully before using.

1. Read owner's manual thoroughly. Failure to follow instructions could cause malfunction of the machine and result in death, serious bodily injury and/or property damage.

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 fl y 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 u s i n g t h i s e q u i p m e n t .

6. Keep operating area clear of all persons.

WARNING

WARNING: Flammable liquids can create fumes which can ignite, causing property damage or severe injury.

RISK OF EXPLOSION:

OPERATE ONLY WHERE

OPEN FLAME OR TORCH

IS PERMITTED

WARNING: Risk of explosion —

Operate only where open fl ame or torch is permitted.

WARNING

WARNING: Risk of fire — Do not add fuel when the product is operating or still hot.

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.

RISK OF FIRE.

DO NOT ADD FUEL

WHEN OPERATING

MACHINE.

and/or explosion.

WARNING: Do not use gasoline crankcase draining or oil containing gasoline, solvents or alcohol. Doing so will result in fi re

WARNING: Risk of fi re — Do not Spray fl ammable liquids.

• 9.801-759.0 • Rev. 11/15

IMPORTANT SAFETY INFORMATION

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 fi res around dry vegetation. A spark arrestor may be required. The operator should contact: Local fi re agencies for laws or regulations relating to fi re 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 overfi lling situation, additional precautions are necessary to ensure that the situation is handled in a safe manner.

8. When in use , do not place machine near fl ammable objects as the engine is hot.

9. Do not store or use gasoline near this machine.

WARNING

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-insulated areas of the pressure washer.

RISK OF INJURY.

HOT SURFACES

CAN CAUSE BURNS

10. Transport/Repair with fuel tank

EMPTY or with fuel shut-off valve

OFF.

11. 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.

WARNING

WARNING: Grip cleaning wand securely with both hands before starting. Failure to do this could result in injury from a whipping wand.

TRIGGER GUN KICKS

BACK - HOLD WITH

BOTH HANDS

12. Never make adjustments on machine while in operation.

13. Be certain all quick coupler fi ttings are secured before using pressure washer.

WARNING

RISK OF INJECTION

OR SEVERE INJURY

TO PERSONS. KEEP

CLEAR OF NOZZLE.

WARNING: High pressure developed by these machines will cause personal injury or equipment damage. Keep clear of nozzle. Use caution when operating. Do not direct discharge stream at people, or severe injury or death will result.

WARNING

WARNING: Protect machine from freezing.

14. To keep machine in best operating conditions, it is important you protect machine from freezing. Failure to protect

PROTECT FROM

FREEZING m a c h i n e f r o m f r e e z i n g could cause malfunction of the machine and result in death, serious bodily injury, and/or property damage. Follow storage instructions specifi ed in this manual.

15. Inlet water must be clean fresh water and no hotter then 90°F.

WARNING

WARNING: Risk of asphyxiation.

Use this product only in a well ventilated area.

RISK OF

ASPHYXIATION. USE

THIS PRODUCT ONLY IN

A WELL

VENTILATED AREA.

16. Avoid installing machines in small areas or near exhaust fans. Adequate oxygen is needed for combustion or dangerous carbon monoxide will result.

17. Manufacturer will not be liable for any changes made to our standard machines or any components not purchased from us.

18. The best insurance against an accident is precaution 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 possibility of a fall due to slippery surfaces.

19. Do not allow acids, caustic or abrasive fl uids to pass through the pump.

5

• 9.801-759.0 • Rev. 11/15

IMPORTANT SAFETY INFORMATION

20. Never run pump dry or leave spray gun closed longer than 1-2 minutes.

21. 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 damage to the pump.

22. Protect discharge hose from vehicle traffi c and sharp objects. Inspect condition of high pressure hose before using or bodily injury may result.

23. Before disconnecting discharge hose from water outlet. Open the spray gun to relieve pressure.

24. Do not overreach or stand on unstable support.

Keep good footing and balance at all times.

25. Do not operate this machine when fatigued or under the infl uence of alcohol, prescription medications, or drugs.

26.

WARNING : Wear eye, hand and skin protection

when handling or connecting battery.

Batteries generate explosive gases dur ing normal

battery operation.

DO NOT expose the battery to fl ame or sparks as

these gases may ignite.

Battery fl uid is highly acidic. If battery fl u id con tacts skin or clothing, wash immediately with soap and water. If battery fl uid enters eye, im me di ate ly fl ood eye with running cold water for at least 15 minutes and get immediate medical attention.

Follow the maintenance instructions specifi ed in the manual.

6

• 9.801-759.0 • Rev. 11/15

COMPONENT IDENTIFICATION

Pressure

Nozzle

Straight

Through Wand

Spray Gun Detergent

Bucket

(not included)

Trigger

ENGINE

Starter Grip

Hose

Detergent

Detergent

Injector

Unloader

Inlet

Screen

Pump protector

Pump

High Pressure

Hose

Garden Hose

(not included)

Pump

Pump — Develops high pressure.

Starter Grip — Used for starting the engine manually.

Spray Gun — Controls the application of water and detergent onto cleaning surface with trigger device.

Includes safety latch.

Unloader valve — Safety device which allows pressure tu be released when spray gun is closed

Detergent Injector — Allows you to siphon and mix detergents. (Not included with machine)

Wand — Must be connected to the spray gun.

High Pressure Hose — Connect one end to water pump discharge nipple and the other end to spray gun.

Pump Protector — Cycles fresh cool water through pump when recirculating water reaches 140°F.

Note : If trigger on spray gun is released for more than 1-2 minutes, water will leak from valve. Warm water will discharge from pump protector onto fl oor. This system prevents internal pump damage.

7

• 9.801-759.0 • Rev. 11/15

ASSEMBLY INSTRUCTIONS

Spray

Gun

Spray

Gun/Wand Pressure

Nozzle

Safety

Latch Wand

Wand

Coupler

High

Pressure Hose

STEP 1: Attach the high pressure hose to the spray gun using tefl on tape on hose threads.

Pressure

Nozzle

Wand

Coupler

STEP 2: Attach wand to spray gun using tefl on tape on wand threads.

Discharge

Nipple

High

Pressure

Hose

STEP 3: Pull spring-loaded collar of the wand coupler back to insert your choice of pressure nozzle.

Cold

Water

Source

Coupler

Collar

Garden

Hose

STEP 4: Release the coupler collar and push the nozzle until the collar clicks. Pull the nozzle to make sure it is seated properly.

Coupler Collar

STEP 5: Connect the high pressure hose to the discharge nipple. Push coupler collar forward until secure.

STEP 6: Connect garden hose to the cold water source.

8

Pump

Garden

Water Inlet

Hose

STEP 7: Check inlets fi lters, remove debris, then connect the garden hose to pump water inlet.

CAUTION: Do not run the pump without water or pump damage will result.

STEPS 8 and 9 for Electric Start Machines Only ( HD 4.0/40 Ge and HD 4.0/40 GeB)

Battery

Terminal

Battery

Box Lid

STEP 8: Place battery in bat tery box. Use a standard

12 volt bat tery.

12 Volt

Battery

Battery Box Box Strap

Black Wire From ground

Red Wire From the motor starter

STEP 9: To reduce the pos si bil i ty of spark ing attach the wires to the battery in the fol low ing order.Refere to image aside. First attach the red wire to the positive “+" terminal of battery and the black wire to the negative

“-" terminal of the battery.To dis con nect the battery remove the wires in the op po site order as installed.

Install bat tery box cover and fasten in place.

• 9.801-759.0 • Rev. 11/15

OPERATING INSTRUCTIONS

Oil Dipstick

Dipstick

Oil Window

STEP 1: Check engine oil level. Oil level should be level with the bottom of the oil fi ller 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 fi rst 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 40 wt. non detergent oil.

Gas

Tank

Cold

Water

Source

Garden

Hose

STEP 3: Fill gas tank with unleaded gasoline. Do not use leaded gasoline.

STEP 4: Connect garden hose to the cold water source and turn water on completely. Never use hot water.

STEP 5: Trigger the spray gun to eliminate trapped air then wait for a steady fl ow of water to emerge from the spray nozzle.

Off

Choke

Fuel

Valve

On

Choke

Choke

Lever

Fuel

Valve

Run

STEP 6: Slide the fuel valve lever to the "ON" position.

When the engine is not in use, leave the fuel valve in the "OFF" position.

STEP 7: Move the choke lever to the "Choke" position (on a warm engine, leave the choke lever in the run position).

• 9.801-759.0 • Rev. 11/15

9

10

OPERATING INSTRUCTIONS

On-Off

Switch

STEP 8: Turn the engine switch to "On" position.

STEP 9: 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.

NOZZLES

Safety

Latch

WARNING! Never replace nozzles without engaging the safety latch on the spray gun trigger.

The four 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 detergent select the black nozzle.

• 9.801-759.0 • Rev. 11/15

DETERGENT AND GENERAL CLEANING TECHNIQUES

WARNING

WARNING: Some detergents may be harmful if inhaled or ingested, causing severe nausea, fainting or poisoning. The harmful elements may cause property damage or severe injury.

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 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.

STEP 1: Connect the optional detergent injector to discharge nipple on machine. Connect high pressure hose to injector with quick coupler. (Check to make sure locking coupler sleeves are in proper position before applying water pressure).

Soap Nozzle

Discharge

Nipple

High

Pressure

Hose

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.

Quick

Coupler

Detergent

Injector

Strainer Recommendations:

STEP 2: Use detergent designed specifically for pressure washers.

Household detergents could damage the pump. Prepare detergent solution as required by manufacturer. Fill a container with pressure washer detergent. Place fi lter end of detergent suction tube into 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 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 fl ush 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.

• 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 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 fl owing by simply removing detergent siphon tube from bottle.

• 9.801-759.0 • Rev. 11/15

11

SHUTTING DOWN AND CLEAN-UP

STEP 1: Remove detergent suction tube from container and insert into one gallon of fresh water. Slide nozzle forward for low pressure or to connect black detergent nozzle.

Pull trigger on spray gun and siphon water for one minute.

STEP 2: Turn off the engine.

On-Off

Switch

STEP 3: Turn off water supply.

STEP 4: Press trigger to release water pressure.

Safety

Latch

Pump

Water Inlet

STEP 5: Disconnect the garden hose from the water inlet on the machine.

Discharge Nipple

STEP 6: Disconnect the high pressure hose from discharge nipple.

STEP 7: Engage the spray gun safety lock.

STORAGE

12

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.

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.

1. Stop the pressure washer, squeeze spray gun trigger to release pressure.

2. Detach water supply hose and high pressure hose.

3. Turn on the machine for a few seconds, until remaining water exits. Turn engine off immediately.

4. Drain the gas and oil from the engine.

4. Cover pressure washer and store in a clean, dry place that is well ventilated away from open fl ame 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 gasoline in a storage container.

5. Do not allow high pressure hose to become kinked.

After Extended Storage

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.

CAUTION: Prior to restarting, thaw out any possible ice from pressure washer hoses, spray gun or wand.

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

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 defl ecting some of the hot air from the engine over the carburetor area. NOTE: Refer to the engine manufacturer's manual for service and maintenance of the engine.

• 9.801-759.0 • Rev. 11/15

TROUBLESHOOTING

For Models: HD 3.0/27 G, HD 3.4/35 G, HD 4.0/40 G, HD 4.0/40Ge

PROBLEM

LOW OPERATING

PRESSURE

POSSIBLE CAUSE

Insuffi cient water supply. Closed faucet. Inlet hose kinked

SOLUTION

Use larger garden hose; clean inlet water screen. Open faucet.

Clogged inlet hose strainer

FLUCTUATING

PRESSURE

Faulty or mis-adjusted unloader valve

Worn packing in pump

Machine has been stored in freezing temperatures

Slow engine RPM

Worn or dirty pump valves

Nozzle is obstructed

Check plumbing system for leaks. Retape leaks with tefl on tape.

Adjust unloader for proper pressure. Install repair kit when needed. Call local distributor.

Call Dealer Customer Support.

Thaw out machine completely, including hose, spray gun and wand.

Call local distributor.

Call local distributor.

Blow out or remove debris with fi ne needle.

Pump sucking air, inlet hose leaking

Insuffi cient water supply

Nozzle worn

Check that all hoses and fi ttings are airtight.

Turn off machine and trigger spray gun until a steady fl ow of water emerges through the nozzle.

Turn water on full force. Check garden hose for kinks, leaks or blockage.

Replace nozzle.

PRESSURE LOW

AFTER PERIOD OF

NORMAL USE

Unloader valve worn Replace unloader valve.

ENGINE WILL NOT

START OR STOPS

WHILE OPERATING

ENGINE IS

OVERLOADED

WATER OR OIL

LEAKING FROM

BOTTOM OF PUMP

PRESENCE OF

WATER IN PUMP OIL

Low oil shutdown

Out of gas

Water in gasoline

Nozzle partially blocked

Excessive pressure from high engine RPM

A small amount of leaking is normal

Water sprayed at machine

Fill engine with oil.

Fill fuel tank.

Drain gas tank; fi ll with clean fuel.

Clean nozzle.

Adjust engine throttle to lower RPM.

If excessive leaking occurs, call local distributor.

Change oil. Direct spray away from machine.

High humidity in air Check and change oil twice as often.

Piston packing worn. Oil seal worn.

Call local distributor.

13

• 9.801-759.0 • Rev. 11/15

14

TROUBLESHOOTING

For Models: HD 3.0/27 G, HD 3.4/35 G, HD 4.0/40 G, HD 4.0/40Ge

PROBLEM

ENGINE OPERATES

FOR 15 MINUTES

THEN STOPS

POSSIBLE CAUSE

Not enough gas or engine oil

SOLUTION

Fill tank with gas. Check oil level.

Vapor lock developed by heat of day Keep gas tank full to avoid vapor locking.

Obstruction in fuel fi lter

Dirty air fi lter

Clean or replace fuel fi lter.

Replace air fi lter.

ENGINE LACKS

POWER

ENGINE FALTERS Choke is opened too soon

WATER DRIPPING

FROM UNDER PUMP

OIL DRIPPING

FROM UNDER PUMP

Piston packing worn

O-Ring plunger retainer worn

Cracked piston

Oil seal worn or damaged

Move choke to halfway position until engine runs smoothly.

Call local distributor.

Call local distributor.

Call local distributor.

Call local distributor.

WATER LEAKING

FROM PUMP

PROTECTOR

NO DETERGENT

GARDEN HOSE

CONNECTION

LEAKS

SPRAY WAND

LEAKS

PUMP IS NOISY

Spray gun closed with machine running 5 minutes or longer

Excess water supply pressure

Open spray gun or turn off machine.

Place a pressure regulator at end of 50' garden hose.

Check connection.

Detergent suction tube not properly connected to machine

Detergent is too thick Dilute detergent. For best results, use manufacturers detergent.

Set detergent fi lter valve to a higher setting.

Detergent fi lter valve is at lowest setting

Filter on detergent suction tube is clogged

Run warm water through fi lter to remove debris.

Damaged or clogged detergent suction tube

Remove obstruction or replace detergent suction tube.

A high pressure nozzle is attached.

Replace with black detergent nozzle.

Discharge nozzle is obstructed

Loose fi ttings

Missing/worn rubber washer

Spray wand not properly attached

Broken o-ring

Pump is sucking air

Blow out or remove debris with fi ne needle.

Tighten fi ttings.

Insert new washer.

Slide the spray wand into the gun. Turn the wand collar clockwise onto the spray gun threads until tight.

Call local distributor and order an o-ring.

Check that hoses and fi ttings are air tight.

Turn off machine and purge pump by squeezing trigger gun until a steady fl ow of water emerges through nozzle.

• 9.801-759.0 • Rev. 11/15

PREVENTATIVE MAINTENANCE

For Models: HD 3.0/27 G, HD 3.4/35 G, HD 4.0/40 G, HD 4.0/40Ge

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. Check pump oil and engine oil level before fi rst use of your new pressure washer.

Inspect

Change

Engine Oil

Filter

Air Cleaner/Filter

Engine Fuel Filter

Spark Plug Maintenance

Inspect

Clean

Clean Fuel Tank(s)

Replace Fuel Lines

Pump Oil

Inspect

Change

Replace High Pressure Nozzle

Replace Quick Connects/O-Rings

Clean Water Screen/Filter

Replace HP Hose

MAINTENANCE SCHEDULE

Daily

First month or 20 hours.

Every 100 hours or every 6 months after fi rst month

Every 50 hours

Every 50 hours

Monthly

500 hours or 6 months

300 hours or annually

Annually

Annually

Oil level daily

After fi rst 50 hours, then every 500 hours or annually

Every 6 months

Annually/As needed

Weekly

Annually (if there are any signs of wear)

• 9.801-759.0 • Rev. 11/15

15

16

TROUBLESHOOTING

For Models: HD3.0/27 GB, HD 3.3/35 GB, HD 4.0/40 GB , HD 4.0/40 GeB

PROBLEM

LOW OPERATING

PRESSURE

FLUCTUATING

PRESSURE

POSSIBLE CAUSE

Faulty pressure gauge

Insuffi cient water supply

Old, worn or incorrect spray nozzle

Belt slippage

Plumbing or hose leak

Faulty or mis-adjusted unloader valve

Worn packing in pump

Fouled or dirty inlet or discharge valves in pump

Worn inlet or discharge valves

Obstruction in spray nozzle

Leaking pressure control valve

Slow engine RPM

SOLUTION

Install new gauge.

Use larger supply hose; clean fi lter at water inlet.

Match nozzle number to machine and/or replace with new nozzle.

Tighten or replace; use correct belt.

Check plumbing system for leaks. Re-tape leaks with tefl on tape.

Adjust unloader for proper pressure. Install repair kit when needed.

Install new packing kit.

Clean inlet and discharge valves.

Pump sucking air

Valves sticking

Unloader valve seat faulty

Worn or dirty pump valves

Nozzle is obstructed

Pump sucking air, inlet hose leaking

Insuffi cient water supply

Nozzle worn

Replace with valve kit.

Remove obstruction.

Rebuild or replace as needed.

Set engine speed at proper specifi cations.

Check water supply and possibility of air seepage.

Check and clean or replace if necessary.

Check and replace if necessary.

Call local distributor.

Blow out or remove debris with fi ne needle.

Check that all hoses and fi ttings are airtight.

Turn off machine and trigger spray gun until a steady fl ow of water emerges through the nozzle.

Turn water on full force. Check garden hose for kinks, leaks or blockage.

Replace nozzle.

PRESSURE LOW

AFTER PERIOD OF

NORMAL USE Unloader valve worn Replace unloader valve.

ENGINE WILL NOT

START OR STOPS

WHILE OPERATING

ENGINE IS

OVERLOADED

Low oil shutdown

Out of gas

Water in gasoline

Nozzle partially blocked

Excessive pressure from high engine RPM

Fill engine with oil.

Fill fuel tank.

Drain gas tank; fi ll with clean fuel.

Clean nozzle.

Adjust engine throttle to lower RPM.

• 9.801-759.0 • Rev. 11/15

TROUBLESHOOTING

For Models: HD3.0/27 GB, HD 3.3/35 GB, HD 4.0/40 GB , HD 4.0/40 GeB

PROBLEM

WATER OR OIL

LEAKING FROM

BOTTOM OF PUMP

PRESENCE OF

WATER IN PUMP OIL

A small amount of leaking is normal

Water sprayed at machine

If excessive leaking occurs, call local distributor.

Change oil. Direct spray away from machine.

High humidity in air Check and change oil twice as often.

Piston packing worn. Oil seal worn.

Call local distributor.

ENGINE OPERATES

FOR 15 MINUTES

THEN STOPS

POSSIBLE CAUSE

Not enough gas or engine oil

Vapor lock developed by heat of day

Obstruction in fuel fi lter

Dirty air fi lter

SOLUTION

Fill tank with gas. Check oil level.

Keep gas tank full to avoid vapor locking.

Clean or replace fuel fi lter.

Replace air fi lter.

ENGINE LACKS

POWER

ENGINE FALTERS Choke is opened too soon

WATER DRIPPING

FROM UNDER PUMP

Piston packing worn

O-Ring plunger retainer worn

Cracked piston

Move choke to halfway position until engine runs smoothly.

Call local distributor.

Call local distributor.

Call local distributor.

OIL DRIPPING

FROM UNDER PUMP

Oil seal worn or damaged Call local distributor.

WATER LEAKING

FROM PUMP

PROTECTOR

NO DETERGENT

GARDEN HOSE

CONNECTION

LEAKS

Spray gun closed with machine running 5 minutes or longer

Excess water supply pressure

Open spray gun or turn off machine.

Place a pressure regulator at end of 50' garden hose.

Check connection.

Detergent suction tube not properly connected to machine

Detergent is too thick Dilute detergent. For best results, use manufacturers detergent.

Set detergent fi lter valve to a higher setting.

Detergent fi lter valve is at lowest setting

Filter on detergent suction tube is clogged

Run warm water through fi lter to remove debris.

Damaged or clogged detergent suction tube

Remove obstruction or replace detergent suction tube.

A high pressure nozzle is attached.

Replace with black detergent nozzle.

Discharge nozzle is obstructed

Loose fi ttings

Missing/worn rubber washer

Blow out or remove debris with fi ne needle.

Tighten fi ttings.

Insert new washer.

17

• 9.801-759.0 • Rev. 11/15

18

TROUBLESHOOTING

For Models: HD3.0/27 GB, HD 3.3/35 GB, HD 4.0/40 GB , HD 4.0/40 GeB

PROBLEM

SPRAY WAND

LEAKS

PUMP IS NOISY

POSSIBLE CAUSE

Spray wand not properly attached

Broken o-ring

Pump is sucking air

SOLUTION

Slide the spray wand into the gun. Turn the wand collar clockwise onto the spray gun threads until tight.

Call local distributor and order an o-ring.

Check that hoses and fi ttings are air tight.

Turn off machine and purge pump by squeezing trigger gun until a steady fl ow of water emerges through nozzle.

PREVENTATIVE MAINTENANCE

HD3.0/27 GB, HD 3.5/35 GB, HD 4.0/40 GB , HD 4.0/40 GeB

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. Check pump oil and engine oil level before fi rst use of your new pressure washer.

Engine Oil

Inspect

Change

Air Cleaner/Filter

Filter

Inspect

Clean

Engine Fuel Filter

Spark Plug

Maintenance

Inspect

Change

Clean Fuel Tank(s)

Inspect

Pump Oil

Change

Replace High Pressure Nozzle

Replace Quick Connects

Clean Water Screen/Filter

Replace HP Hose

Belts*

Tighten

Inspect/Replace

MAINTENANCE SCHEDULE

Daily

First month or 20 hours.

Every 100 hours or every 6 months after fi rst month

Every 50 hours

Daily

Every 3 months or 50 hours

500 hours or 6 months

Every 6 months or 100 hours

Every year or 300 hours

Annually

Oil level daily

After fi rst 50 hours, then every 500 hours or annually (or 3 months)

Every 6 months

Annually

Weekly

Annually (if there are any signs of wear)

Every 6 months

Every 6 months

*Note: When servicing belts, don't exceed 14 lb-ft on pump mounting screws.Failure to do so will cause pump thread damage.

• 9.801-759.0 • Rev. 11/15

5

ACCESSORIES ASSEMBLY

3

2

4

7

1

10

6

5

9

8

ACCESSORIES ASSEMBLY PARTS LIST

ITEM PART NO. DESCRIPTION

8.750-247.0 M407

QTY

1

1

3 8.783-039.0 Wand 30" Zinc Plated, Handle & Coupler (HD 3.0/27 G, HD 3.0/27 GB)

8.783-040.0 Wand 44" Zinc Plated, Handle & Coupler (HD 3.4/35 G, HD 4.0/40 G, HD 4.0/40Ge,

HD 3.3/35 GB, HD 4.0/40 GB, HD 4.0/40 GeB)

1

1

4 Quick Connect Nozzle Kit (3.5) (HD 3.0/27 G, HD 3.4/35 G and HD 3.3/35 GB)

8.712-337.0 ▲ Nozzle,

8.712-338.0 ▲ Nozzle,

8.712-339.0 ▲ Nozzle,

8.712-340.0 ▲ Nozzle,

8.712-398.0 ▲ Nozzle

Quick Connect Nozzle Kit (3.75) (HD3.0/27 GB)

9.804-627.0 ▲ Nozzle, 000375, 1

9.804-625.0 ▲ Nozzle, 250375, 1

9.804-624.0 ▲ Nozzle, 150375, 1

9.804-626.0 ▲ Nozzle, 400375, 1

8.712-398.0 ▲ Nozzle

Quick Connect Nozzle Kit (4.0) (HD 4.0/40 G, HD 3.9/40 GB, HD 4.0/40 Ge, HD 4.0/40 GeB)

8.712-345.0 ▲ nozzle,

8.712-346.0 ▲ nozzle,

8.712-347.0 ▲ nozzle,

8.712-348.0 ▲ nozzle,

8.712-398.0 ▲ Nozzle

3/8"plug, 1

Injector, 0.083 1

5.731-652.0 weight

1

1

3/8" Male,

• 9.801-759.0 • Rev. 11/15

19

OIL CHANGE RECORD

Check pump oil and engine oil level before fi rst use of your new pressure washer.

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

20

• 9.801-759.0 • Rev. 11/15

KNA, Inc.4555 Airport Way Denver, CO 80239

Form #9.801-759.0 • Revised 11/15 • Printed in U.S.A. or Mexico