K RCHER HD 728 B CAGE Professional Petrol Pressure Washer User Manual

June 13, 2024
K RCHER

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HD 728 B CAGE Professional Petrol Pressure Washer

K RCHER HD 728 B CAGE Professional Petrol Pressure Washer - overview
1 Please read and comply with these original instructions prior to the initial operation of your appliance and store them for later use or subsequent owners.
– Before first start-up it is definitely necessary to read the operating instructions and safety indications Nr. 5.951949.0!
– In case of transport damage inform vendor immediately.
– When unpacking the product, make sure that no accessories are missing and that none of the package contents have been damaged.

Environmental protection

The packaging material can be recycled. Please do not place the packaging into the ordinary refuse for disposal, but arrange for the proper recycling.
Old appliances contain valuable materials that can be recycled. Please arrange for the proper recycling of old appliances. Batteries and accumulators contain substances that must not enter the environment. Please dispose of your old appliances, batteries and accumulators using appropriate collection systems.
Electrical and electronic devices often contain components which could potentially pose a danger to human health and the environment if handled or disposed of incorrectly. However, these components are necessary for the proper operation of the device. Devices marked with this symbol must not be disposed of with regular household rubbish.
Please do not release engine oil, fuel oil, diesel and petrol into the environment Protect the ground and dispose of used oil in an environmentally- clean manner.
Notes about the ingredients (REACH)
You will find current information about the ingredients at: www.kaercher.com/REACH

Device elements

Illustrations on Page 2

  1. Triple nozzle
  2. Marking of the nozzle
  3. Spray lance EASY!Lock
  4. Trigger gun EASY!Force
  5. Safety catch
  6. Trigger
  7. Safety lever
  8. High pressure hose EASY!Lock
  9. Fuel tank
  10. Device for manual start
  11. Connection for water supply with filter
  12. Dosage valve for detergent
  13. High-pressure connection EASY!Lock
  14. Detergent suction hose with filter
  15. Oil tank

Colour coding
– The operating elements for the cleaning process are yellow.
– The controls for the maintenance and service are light gray.

Proper use

Use this high pressure cleaner exclusively for
– Cleaning using low pressure jet and detergent (for e.g. for cleaning machines, cars, buildings, tools),
– For cleaning using high pressure jet without detergent (for e.g. for cleaning facades, terraces, garden appliances).
For stubborn dirt, we recommend the use of the dirt blaster as a special accessory.
DANGER
Risk of injury! Follow the respective safety regulations when operating at gas stations or other dangerous areas. Quality requirements for water:
ATTENTION
Only clean water may be used as high pressure medium. Impurities will lead to increased wear and tear  or formation of deposits in the appliance.
If recycled water is used, the following limit values must not be exceeded.
Please do not let mineral oil contaminated waste water reach soil, water or the sewage system. Perform  engine cleaning andbottom cleaning  thereforeonly on specified places with an oil trap.

pH value 6,5…9,5
electrical conductivity * Conductivity fresh water +1200 pS/cm
settleable solids ** < 0,5 mg/I
total suspended solids *** < 50 mg/I
Hydrocarbons < 20 mg/I
Chloride < 300 mg/I
Sulphate < 240 mg/I
Calcium < 200 mg/I
Total hardness < 28 °dH

< 50 °TH
< 500 ppm (mg CaCO3/I)
Iron| < 0,5 mg/I
Manganese| < 0,05 mg/I
Copper| < 2 mg/I
Active chloride| < 0,3 mg/I
free of bad odours

  • Maximum total 2000 pS/cm
    ** Test volume 1 I, settling time 30 min ‘ no abrasive substances

Safety instructions

DANGER
– Do not use high pressure cleaners when there has been an oil spill; move the appliance to another spot and avoid any sort of spark formation.
– Do not store, spill or use fuel in the vicinity of open flames or appliances such as ovens, boilers, water heaters, etc. that have an ignition flame or can generate sparks.
– Keep even mildly inflammable objects and materials away from the muffler (at least 2 m).
– Do not start the engine without the muffler; check, clean and replace, if required, the muffler at regular intervals.
– Do not use the engine in forest, bushes or grassy areas without fitting a spark receiver at the exhaust
– Except for setting jobs, do not run the engine when the air filter is removed or there is no cover over the suction support.
– Do not make any adjustments to the regulator springs, regulator bars or other parts that can bring forth an increase in the engine speed.
– Risk of burns! Do not touch hot silencers, cylinders or radiator ribs.
– Do not put hands or feet close to moving or rotating parts.
– Risk of poisoning! The appliance should not be operated in closed rooms.

Hazard levels
DANGER
Pointer to immediate danger, which leads to severe injuries or death.
WARNING
Pointer to a possibly dangerous situation, which can lead to severe injuries or death.
CAUTION
Pointer to a possibly dangerous situation, which can lead to minor injuries.
ATTENTION
Pointer to a possibly dangerous situation, which can lead to property damage.
Symbols on the machine
High-pressure jets can be dangerous if improperly used. The jet may not be directed at persons, animals, live electrical equipment or at the appliance itself.
Risk of poisoning! Do not inhale exhaust fumes.
Risk of burns! Beware of hot components.
WARNING
Observe regulations of water supplier.
According to applicable regulations, the appliance must never be used on the drinking water net without a system separator. A suitable system separator by KÄRCHER or alternatively a system separator according to EN 12729 type BA must be used.
Water that was flowing through a system separator is considered non-drinkable.
General
– Please follow the national rules and regulations for fluid spray jets of the respective country.
– Please follow the national rules and regulations for accident prevention of the respective country. Fluid spray jets must be tested regularly and the results of these tests must be documented in writing.
– The appliance/accessories must not be modified.

Safety Devices

Safety devices serve to protect the user and must not be rendered in operational or their functions bypassed.
Overflow valve
– If the hand spray gun is closed, the overflow valve opens and the high pressure pump diverts the water back to the pump suction side. Thus the permissible working pressure is not exceeded.
– The overflow valve is set by the manufacturer and sealed. Setting only by customer service.
Safety thermostat at the pump
The safety thermostat switches off the motor when the maximum permissible temperature has been exceeded.
Start up
DANGER
Risk of injury! Device, tubes, high pressure hose and connections must be in faultless condition. If they are not in a perfect state then the appliance must not be used.
Check oil level of the high pressure pump

  • Check oil level in the oil tank.  The oil level must lie between “MIN“ and “MAX“ marking.
  • Add oil if required (see technical specifications).

Motor
Follow the instructions given in the section “Safety Instructions”!

  • Read the operating instructions of the engine manufacturer before start-up and follow the safety instructions carefully.
  • Fill the fuel tank with unleaded petrol. Do not use 2-speed mixture.
  • Check oil level of the engine.

Do not operate the appliance if the oil level has fallen below “MIN”.

  • If required, top up oil carefully.

Attaching the Accessories

Note: The EASY!Lock system joins components with a quick-fasten thread solidly and securely with just one turn.K RCHER HD 728 B CAGE Professional
Petrol Pressure Washer - overview 2

  • Mount the nozzle on the spray lance (marking on the adjustment ring at the top) and hand-tighten it (EASY!Lock).
  • Join the spray lance with the trigger gun and tighten until hand-tight (EASY!Lock).
  • Join the high-pressure hose with trigger gun and high-pressure connection of the appliance and tighten until handtight (EASY!Lock).

Water connection
– For connection values refer to technical specifications.
WARNING
Observe regulations of water supplier.
According to applicable regulations, the appliance must never be used on the drinking water net without a system separator. A suitable system separator by KÄRCHER or alternatively a system separator according to EN 12729 type BA must be used.
Water that was flowing through a system separator is considered non-drinkable.
CAUTION

Always connect the system separator to the water supply, never directly to the appliance!

  • Connect the supply hose to the water connection point of the machine and at the water supply point (for e.g. a tap).
  • Open the water supply.

Note:
The supply hose is not included. Suck in water from vessel
DANGER
Never suck in water from a drinking water container. Never suck in liquids which contain solvents like lacquer thinner, petrol, oil or  unfiltered water. The sealings within the device are not solvent resistant. The spray mist of solvents is highly inflammable, explosive and poisonous.

  • Connect suction hose (minimum diameter 3/4“) with filter (accessory) to the water connection point. “
  • Set dosing value for detergent to “0”.
  • Remove air from appliance before operation.

Note:
Do not use the Geka coupling (included in delivery) for vacuuming operations! Not all connector couplings are suitable for vacuuming operations (pump sucks air and therefore does not build up pressure). Deaerating the appliance

  • Open the water supply.
  • Start the engine according to the operating instructions of the engine manu- facturer.
  • To dearate the appliance, unscrew the nozzle and allow the appliance to run until the water exits in a bubble-free state.
  • Switch off the appliance and fit the nozzle again.

Operation

DANGER
Risk of explosion!
Do not spray flammable liquids.
If the appliance is used in hazardous areas (e.g. filling stations) the corresponding safety regulations must be observed.
Risk of injury! Hold the hand spray gun and the spray pipe firmly with both hands.
Risk of injury! The trigger and safety lever may not be locked during the operation.
Risk of injury! Contact Customer Service if the safety lever is damaged.
Risk of injury from high-pressure water jet.
Slide the safety catch on the trigger gun forward before performing any work with the appliance.
CAUTION
Environmental damage. Clean motors at places with a corresponding oil separator only.

  • To open the trigger gun: Actuate the safety lever and trigger.
  • To close the hand spray gun: Release the safety lever and trigger. Opening/closing the trigger gun

Turning on the Appliance

  • Open the water supply.
  • Set the appliance switch at the engine to “ON” and open the fuel supply valve.
  • Start the motor with the trigger gun open according to the operating instructions of the motor manufacturer.

Note:  The spray lance can be removed to facilitate the start-up process.

  • Press the lever on the hand spray gun.

Select spray type

  • Close the hand spray gun.
  • Turn the casing of the nozzle till the desired symbol matches the marking.

| High pressure circular spray (0°) for specially stubborn dirt
---|---
| Flat low pressure spray (CHEM) for operating using detergents or cleaning at low pressure.
| High pressure flat spray (25°) for large dirt areas

Operation with detergent
WARNING
Unsuitable detergents can cause damage to the appliance and to the object to be cleaned. Use only those detergents that have been approved by Kärcher. Observe the dosage and other instructions provided with these detergents. For considerate treatment of the  environment use detergent economically.
Follow the safety instructions for using detergents.
– Use only those detergents approved by the manufacturer of the appliance.
– Kärcher detergents ensure smooth functioning. Please consult us or ask for our catalogue or our detergent information sheets.

  • Suspend end of suction hose in a container filled with detergent.
  • Set nozzle to “CHEM”.
  • Set dosing value for detergent to the desired concentration.

Recommended cleaning method
– Loosen the dirt:
Spray detergent economically and let it work for 1…5 minutes but do not let it dry up.
– Remove the dirt: Spray off loosened dirt with the high pressure jet.
After operation with detergent

  • Set dosing value for detergent to “0”.
  • Open the hand spray gun and rinse the appliance for at least 1 minute.

Interrupting operation

  • Close the hand spray gun.

Note:
If the trigger gun is closed, the motor continues to run at idling speed. The water thus circulates within the pump and heats up. When the cylinder  head at the pump has reached the maximum permissible temperature (80 °C), the safety thermostat at the cylinder head switches off the motor. The device can be restarted after cooling down to below 50 °C.
Cooling can be hastened while using compressed water from the water supply pipes:

  • Open the trigger gun for approx. 2–3 minutes so that the circulating water cools down the cylinder head.
  • Restart the engine.

Turn off the appliance
After operating the water using saline water (sea water), open the hand spray gun and rinse the appliance for at least 2 – 3 minutes using tap water.

  • Set the appliance switch at the engine to OFF and close the fuel supply valve.
  • Shut off water supply.
  • Activate trigger gun until device is pressureless.
  • Secure the trigger gun. To do so, push the safety catch towards the front.
  • Remove the water inlet hose from the appliance.

Transport

CAUTION
Risk of injury and damage! Observe the weight of the appliance when you transport it.
ATTENTION
Protect the trigger from damage during transport.

  • Lift appliance by the pipe frrame and carry it.
  • When transporting in vehicles, secure the appliance according to the guidelines from slipping and tipping over.

Storage

CAUTION
Risk of injury and damage! Note the weight of the appliance in case of storage.
This appliance must only be stored in interior rooms.

Care and maintenance

You can sign with your dealer a contract for regular safety inspection or even sign a maintenance contract. Please take advice on this matter.
DANGER
Risk of injury if the machine is left running in an unattended state. Remove the spark plug connector prior to performing any work on the device.
Risk of burns! Do not touch hot mufflers, cylinders or radiator ribs.
High-pressure pump
Weekly

  • Check oil level.

Please contact Customer Service immediately if the oil is milky (water in oil).
Monthly

  • Clean the sieve in the water connection.
  • Clean filter at the detergent suck hose.

Every 500 operating hours, at least annually

  • Have the maintenance of the device performed by the customer service.
  • Oil change.

Oil change:

  • Ready a catch bin for appr. 1 Liter oil.
  • Turn out the oil drain screw.
  • Drain the oil in a collection basin.

Dispose of old oil ecologically or turn it in at a collection point.

  • Replace washers of the oil drain screw.
  • Screw in the oil drain screw.
  • Slowly fill in new oil until the “MAX” marking on the oil container.

Note:
Air pockets must be able to leak out.
For oil type and filling quantity refer to technical specifications.
Motor
Carry out maintenance tasks to the engine according to the specifications provided in  the operating instructions of the engine manufacturer.

High pressure hose
Danger
Risk of injury!

  • Check the high pressure hose for damages (risk of bursting).

Please arrange for the immediate exchange of a damaged high-pressure hose.
Frost protection

ATTENTION
Risk of damage! Freezing water in the appliance can destroy parts of the appliance.
Store the  appliancein a heated room during winter or empty it. During longer breaks in operation, it is advisable to pump in antifrost agents into the appliance.
Drain water

  • Screw off water supply hose and high pressure hose.
  • Operate device for max. 1 minute until the pump and conduits are empty.

Flush device with anti-freeze agent
Note:
Observe handling instructions of the antifreeze agent manufacturer.

  • Pump in conventional frost protection agents through the appliance.

A certain corrosion protection is achieved with this as well.

Troubleshooting

DANGER
Risk of injury if the machine is left running in an unattended state. Remove the spark plug connector prior to performing any work on the device.
Risk of burns! Do not touch hot mufflers, cylinders or radiator ribs.
Appliance is not running
Follow operating instructions of the engine manufacturer!
– Safety thermostat at the high pressure pump has switched off the appliance after long period of cycle operation.

  • Allow the appliance to cool down; then restart it. Refer section “Interrupting operation”.

Device is not building up pressure
– Operating speed of the engine is too low
Check operating speed of the engine (refer to technical data).
– Nozzle is set to “CHEM”
Set nozzle to “High pressure”.
– Nozzle is blocked/ washed out
Clean/ replace nozzle.
– Sieve in the water connection is dirty
Clean sieve.
– Air within the system
Appliance ventilation:
– Amount of water supply is too low.
Check water supply level (refer to technical data).
– Pipe inlets to pump are leaky or blocked
Check all inlet pipes to the pump.
Device leaks, water drips from the bottom of the device
– Pump leaky
Note: 3 drops/minute are allowed.

  • With stronger leak, have device checked by customer service.

Pump is vibrating
– Inlet pipes to the pump are leaky.
Check all inlet pipes to the pump.
– Air within the system
Appliance ventilation:

Detergent is not getting sucked in
– Nozzle is set to “High pressure”
Set nozzle to “CHEM”.
– Detergent suction hose with filter is leaky or blocked
Check/ clean detergent suction hose with filter.
– Backflow valve in the connection of the detergent suction hose is jammed
Clean/ replace backflow valve in the connection of the detergent suction hose.
– Detergent dosing valve is closed or leaky/ blocked
Open or check/clean detergent dosing valve.
If malfunction can not be fixed, the device must be checked by customer service.

Accessories and Spare Parts

Only use original accessories and spare parts, they ensure the safe and trouble-free operation of the device.
For information about accessories and spare parts, please visit www.kaercher.com.

Warranty

– The warranty terms published by our competent sales company are applicable in each country. We will repair potential failures of the appliance within the warranty period free of charge, provided that such failure is caused by faulty material or defects in fabrication.
– The warranty comes only into effect if your vender fills out the supplied reply card completely at purchase, stamps and signs and you send it to the local distribution company of your country.
– In the event of a warranty claim please contact your dealer or the nearest authorized Customer Service centre. Please submit the appliance, including all accessories, and the proof of purchase.

EU Declaration of Conformity

We hereby declare that the machine described below complies with the relevant basic safety and health requirements of the EU Directives, both in its basic design and construction as well as in the version put into circulation by us. This declaration shall cease to be valid if the machine is modified without our prior approval.
Product: High pressure cleaner
Type: 1.187-xxx
Relevant EU Directives
2006/42/EC (+2009/127/EC)
2000/14/EC
2014/30/EU
Applied harmonized standards
EN 60335–1
EN 60335–2–79
EN 55012: 2007 + A1: 2009
EN 55014–2: 2015
Applied national standards
Applied conformity evaluation method 2000/14/EC:
Appendix V Sound power level dB(A)
Measured: 99
Guaranteed: 100
The undersigned act on behalf and under the power of attorney of the company management.K RCHER HD 728 B CAGE Professional Petrol Pressure Washer - icon
10Authorised Documentation Representative S. Reiser
Alfred Kärcher GmbH Co. KG
Alfred-Kärcher-Str. 28 – 40
71364 Winnenden (Germany)
Phone: +49 7195 14-0
Fax: +49 7195 14-2212
Winnenden, 2016/11/01

Technical specifications

Motor

Honda Petrol engine| —| GX 160. 1 cylinder. 4-stroke
Maximum torque at 3600 rpm| kW (PS)| 4 (5.5)
Operating speed| 1/min| 3300
Fuel tank| I| 3.6
Fuel| —| Petrol. unleaded*
• Appliance is suitable to use E10 petrol
Type of protection| | IPX5
Water connection
Max. feed temperature| °C| 60
Min. feed volume| 1/h (Umin)| 750 (12.5)
Max. feed pressure| MPa (bar)| 1 (10)
Inlet hose (accessory)| Order no.| 4.440-207.0
Inlet hose length (min.)| m| 8.
Inlet hose diameter (min.)| Inch| 3/4
Suck height from open container (20 °C)| m| 1
Pump
Operating pressure of water (using standard noz- zle)| MPa (bar)| 14 (140)
Flow rate| I/h (I/min)| 600 (10)
Size of standard nozzle| | 038
Max. operating over-pressure| MPa (bar)| 16 (160)
Oil quantity – pump| I| 0.3
Oil type – pipe| SAE 15W40| Order no. 6.288-050.0
Detergent suck in| I/h (I/min)| 0-45 (0-0.8)
Max. recoil force of trigger gun| N| 28
Values determined as per EN 60335-2-79
Hand-arm vibration value
Hand spray gun| m/s:| <2.5
Spray lance| m/s:| <2.5
Uncertainty K| m/s:| 1
Sound pressure level L.,,,,| dB(A)| 85
Uncertainty Ks,| dB(A)| 1
Sound power level L., + Uncertainty KO,| dB(A)| 100
Dimensions and weights
Length| mm| 570
Width| mm| 434
Height| mm| 430
Typical operating weight| kg| 35.5

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References

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