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HD • 9.807-622.0 • Rev. 03/20

OPERATOR’S MANUAL        

PRESSURE WASHER

  

10

WARNING: Some detergents 
may be harmful if inhaled or 
ingested, causing severe nau-
sea, fainting or poisoning. The 
harmful elements may cause 
property damage or severe 
injury.
STEP 1: 

Connect detergent injec-

tor 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).

STEP 2:

 Use detergent designed 

specifically for pressure washers. 
Prepare detergent 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 cou-
pler.  

NOTE:

  Detergent cannot 

be applied using 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 flush the detergent injec

-

tion system after each use by placing the suction 
tubeinto a bucket of clean water, then run the pres-
sure 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 sweep-
ing 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 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 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

Soap Nozzle

Detergent 

Injector

Discharge 

Nipple

Strainer

Quick 

Coupler

High Pressure 

Hose

DETERGENT AND GENERAL CLEANING TECHNIQUES

Summary of Contents for HD 3.5/40 P

Page 1: ...RIE BN AH ME UN BE DIN GT BE DIE NU NG SA NL EIT UN G DU RS CH LE SE N NO UT ILIZ AR SIN AN TE S NO HA BE R LE IDO EL MA NU AL 9 807 622 0 03 20 High pressure cleaner Combustion engine Cold water Reg...

Page 2: ...You should record both serial number and date of purchase and keep in a safe place for future reference HD 9 807 622 0 Rev 03 20 Important Safety Information 3 5 Component Identification 6 Assembly I...

Page 3: ...al 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 a...

Page 4: ...nal injury or equip ment damage Keep clear of nozzle Use caution when op erating Do not direct discharge stream at people or severe injury or death will result 13 Never make adjustments on machine whi...

Page 5: ...ning models use only kerosene No 1 home heating fuel or diesel If diesel is used add a soot remover to every tankful 27 This pressure washer is equipped with pneumatic tires which may not be fully inf...

Page 6: ...udes 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 and the other end...

Page 7: ...ated properly STEP 8 Connect the high pres sure hose to the pump discharge nipple Push coupler collar forward until secure STEP 5 Attach nozzle extension to spray gun wand Tighten both by hand STEP 6...

Page 8: ...level by using dipstick or observe oil level in oil window if equipped Use 30 wt non detergent oil STEP 5 Rotate the fuel shut off valve to the On position Slide the fuel valve lever to the ON positio...

Page 9: ...ttle to fast position CAUTION Small engines may kick back Do not hold pull starter grip tightly in hand OPERATING INSTRUCTIONS CON T WARNING Never replace nozzles without engaging the safety latch on...

Page 10: ...h 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 alway...

Page 11: ...s 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 Po...

Page 12: ...alves Contact local dealer Nozzle is obstructed Blow out or remove debris with fine needle Pump sucking air inlet hose leak ing Check all pump lines and connections PRESSURE LOW AFTER PERIOD OF NORMAL...

Page 13: ...0 garden hose NO DETERGENT Detergent suction tube not properly connected to machine Check connection Detergent is too thick Dilute detergent For best results use manufac turers detergent Detergent fil...

Page 14: ...under severe conditions MAINTENANCE SCHEDULE Engine Oil SAE 10W 30 Inspect Daily Change First month or 20 hours Every 100 hours or every 6 months after first month Filter Every 50 hours Air Cleaner Fi...

Page 15: ...it 040 104 0 1 9 802 296 0 Nozzle 0015 Yellow 1 9 802 297 0 Nozzle 0025 Green 1 8 932 298 0 Nozzle 0040 White 1 4 8 904 154 0 Quick Connect Nozzle Kit 035 102 0 223 0 1 8 712 338 0 Nozzle 1503 5 Yello...

Page 16: ...wer Washer Change pump oil after first 50 hours every year or 500 hours thereafter Use SAE 10W 40 non foaming Engine oil Check daily before first use of your new Power Washer Change engine oil after f...

Page 17: ...e Meinung Rate your product and tell us your opinion valuer votre produit et dites nous votre opinion Rese e su producto y d ganos su opini n www kaercher com welcome www kaercher com dealersearch Alf...

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