KARCHER HD 8-18-4 M St Vacuum Cleaner-LOGO

KARCHER HD 8-18-4 M St Vacuum Cleaner

KARCHER HD 8-18-4 M St Vacuum Cleaner-PROD

General notes

Read these original operating instructions and the enclosed safety instructions before using the device for the first time. Act in accordance with them. Keep both books for future reference or for future own-ers.

Intended use

Use this high-pressure cleaner only for the following types of work: Use the high-pressure jet for cleaning machines, vehi-cles, buildings, tools and similar objects. We recommend using a rotary nozzle as a special ac-cessory for stubborn soiling. The HD…Plus is supplied with a rotary nozzle.

ATTENTION
Dirty water leads to premature wear or deposits in the device. Clean the device using only clean water, or recycled wa-ter that does not exceed the following limits:

  • pH value: 6.5…9.5
  • Electrical conductivity: Conductivity of fresh water + 1200 µS/cm, maximum conductivity 2000 µS/cm
  • Settleable particles (sample volume 1 l, settling time 30 minutes): < 0.5 mg/l
  • Filterable particles: < 50 mg/l, no abrasive sub-stances
  • Hydrocarbons: < 20 mg/l
  • Chloride: < 300 mg/l
  • Sulphate: < 240 mg/l
  • Calcium: < 200 mg/l
  • Total hardness: < 28 °dH, < 50° TH, < 500 ppm (mg CaCO3/l)
  • Iron: < 0.5 mg/l
  • Manganese: < 0.05 mg/l
  • Copper: < 2 mg/l
  • Active chloride: < 0.3 mg/l
  • Free of unpleasant odours

Safety instructions

  • Read the safety instructions 5.951-949.0.before ini-tial startup.
  • Observe the national regulations for liquid jet clean-ers.
  • Observe the national accident prevention regula-tions. Liquid jet cleaners must be tested regularly. The test result must be recorded in writing.
  • Do not modify the device or accessories.

Symbols on the device

The device may not be connected to the pub-lic drinking water network. The high-pressure jet must not be directed at persons, animals, live electrical equipment or at the device itself. Protect the device from frost.

Safety devices

Safety devices protect the user and may not be disabled or functionally circumvented.The overflow valve, pressure switch an safety valve are set and sealed by the manufacturer. Adjustments are performed only by customer service.

Overflow valve with pressure switch

When the water quantity is reduced via the pressure/quantity control on the trigger gun, the overflow valve opens and part of the water flows back to the suction side of the pump. When the trigger on the high-pressure gun is release, the pressure switch switches off the high-pressure pump and the high-pressure jet stops. The pump switches on again when the trigger is pulled.

Safety valve

The safety valve opens when the permissible operating pressure is exceeded and the water flows back to the suction side of the pump.

Control elementsKARCHER HD 8-18-4 M St Vacuum Cleaner-FIG1

See graphics page

  1. Protector
  2. Nozzle
  3. Pressure and quantity regulation*
  4. EASY!Lock spray lance
  5. EASY!Force high-pressure gun
  6. Safety latch
  7. Trigger
  8. Unlocking lever
  9. EASY!Lock high-pressure hose
  10. Push handle, top (pulled out)
  11. Hose reel
  12. Push handle, bottom (pushed in)
  13. Rubber band
  14. Cable clips, also a hose holder with the HD…M
  15. Spray lance holder
  16. Nozzle storage for rotary nozzle*
  17. Power switch
  18. Spray lance holder
  19. EASY!Lock high-pressure connection
  20. Sieve
  21. Hose spout
  22. Union nut
  23. Water connection
  24. Skid, stand
  25. Holder for foam nozzle*
  26. Transport retainer for surface cleaner*
  27. Push handle lock
  28. Crank

not in the scope of delivery for all device variants

Colour coding

  • Control elements for the cleaning process are yel-low.
  • Control elements for maintenance and servicing are light grey.

Unpacking

  1. Check the package content when unpacking.
  2. Notify the dealer immediately in the case of shipping damage.
  3. Only with HD…M St: Store the drilling template on the packaging for mounting the device on the wall.V

Note
No accessories are supplied in the scope of delivery for the HD…M St.
Note
The EASY!Lock system connects components quickly and safely via a single turn of the quick-release thread.

Figure AKARCHER HD 8-18-4 M St Vacuum Cleaner-FIG4

  1.  Plug the high-pressure nozzle onto the spray lance.
  2.  Fit the union nut and hand-tighten (EASY!Lock).
  3. Connect the spray lance to the high-pressure gun and hand-tighten (EASY!Lock).

For devices without a hose reel:

  1. 1. Connect the high-pressure hose to the high-pressure gun and high-pressure connection of the de-vice and tighten hand-tight (EASY!Lock).

For devices with a hose reel:

  1. Lay the high-pressure hose on the ground in a straight line.
  2. Turn the crank clockwise and wind the high-pres-sure hose onto the hose reel in evenly distributed layers. Take care to ensure that the hose does not become kinked.
  3. Connect the high-pressure hose to the high-pres-sure gun and hand-tighten (EASY!Lock).

Initial startup

Installation of HD…M St

DANGER
Danger of injury from electric shock
Only allow authorised technical specialists to install the water supply, electrical connections and high-pressure network.

Ambient conditions

  • Dry, frost-free environment.
  • No danger of explosion.
  • Solid, level floor or wall of sufficient loading capacity.
  • Do not install in the vicinity of residential spaces or offices (noise emission).
  • Accessibility for maintenance work.
  • Water drain at installation location.

Fastening the device

Note
Screws and dowels for fastening the holder are not pro-vided in the scope of delivery. The must be selected to suit the requirements of the installation location and must be procured separately. Required screw diameter of 6…8 mm.

DANGER
Risk of injury from a falling device
Take the weight of the device and the loading capacity of the installation location into account when selecting the fasteners.

Figure B KARCHER HD 8-18-4 M St Vacuum Cleaner-FIG5

  1. Wall mounting
  2. Floor installation
  3. Mounting opening
  4. Holder
  • Mark the mounting holes on the wall or floor using the drilling template.
  • Drill the holes.
  • Attach the holder but only tighten the screws lightly.
  • Adjust the holder clearance by turning with an open-end wrench.
  • Tighten the fastening screws.
  • Mount the device.

Electrical connection

DANGER
Risk of injury from electric shock
Use a plug to connect the device to the mains grid. Permanent connection to the mains grid is prohibited. The plug is used for disconnection from the mains.
HD…M St: The power supply used for operating the device must be able to supply enough power for continuous operation.
HD…M St: All live parts, cables, and devices in the work area must be protected against water jets.

  1. Plug the mains plug into the socket.

Water connection

Connection to a water line
WARNING
Health risk from return flow of contaminated water into the drinking water network. Observe the regulations of your water supply company. According to applicable regulations, the device must never be used with the drinking water network without a system separator. Use a system separator from KÄRCHER or a system separator as per EN 12729 Type BA. Water that has flowed through a system sep-arator is classified as undrinkable. Always connect the system separator to the water supply and never directly to the water connection on the device.

  1. Check the feed pressure, input temperature and in-put amount of the water supply. See the “Technical data” section for the requirements.
  2. Connect the system separator and water connection of the device with a hose (minimum length 7.5 m, minimum diameter 1”). The supply hose is not included in the scope of de-livery.
  3. Open the water inlet.

Suck water from the container

  1. Screw the suction hose (order number 4.440-207.0) and filter (order number 4.730-012.0) onto the water connection.
  2. Vent the device.

Vent the device 

  1. Unscrew the nozzle from the spray lance.
  2. Allow the device to run until the escaping water is free of air bubbles.
  3. In the case of venting problems, allow the device to run for 10 seconds and then switch it off. Repeat the procedure several times.
  4. Switch off the device.
  5. Screw the nozzle back in place.

Only HD…M St: High-pressure installation 

The applicable national regulations for permanently in-stalled high-pressure cleaning systems must be ob-served.

  1. Connect the device to the permanently installed pip-ing using a high-pressure hose line.
  2. Route the permanently installed piping with as few changes in direction as possible.
  3. Route the piping using padded loose and fixed clips to compensate for pressure and thermal expansion.
  4. Minimum line cross-sections:
    • Pipelines: Nominal width DN 15 (1/2”).
    • Hose lines: Nominal width DN 6.

Operation

DANGER
Risk of injury from the high-pressure water jet Never fasten the trigger and safety lever in the actuated position. Do not use the high-pressure gun when the safety lever is damaged. Push the safety latch of the high-pressure gun forwards every time before starting work with the device.

Opening/closing the high-pressure gun 

  1. Opening the high-pressure gun: Actuate the safety lever and trigger.
  2. Closing the high-pressure gun: Release the safety lever and trigger.

High-pressure operation 

The device can be operated in a standing or lying posi-tion.
Note
The device is equipped with a pressure switch. The mo-tor only starts up when the high-pressure gun is open.

  1. Device with a hose reel: Completely unroll the high-pressure hose from the hose reel.
  2. Set the power switch to “I”.
  3. Unlock the high-pressure gun by pushing the safety latch of the high-pressure gun to the rear.
  4. Open the high-pressure gun.
  5. For devices with pressure and volume regulator: Set the working pressure by turning the pressure and volume regulator.

Operation with detergent

Note
A cup foam lance (optional)is needed for operating with detergent.
WARNING
Health risk through incorrect handling of deter-gents Observe the safety instructions on the detergent. ATTENTION Unsuitable detergents can damage the device and the object to be cleaned. Use only detergents approved by KÄRCHER. Observe the dosing recommendations and notes pro-vided with the detergent. Use detergents sparingly to help conserve the environ-ment. KÄRCHER detergents ensure fault-free operation. Ask us for a consultation, request our catalogue or our de-tergent information sheets.
Figure CKARCHER HD 8-18-4 M St Vacuum Cleaner-FIG6

  1. Foam nozzle
  2. Container
  3. Gate Detergent mixing: 3=high, 2=medium, 1=low
  4. suction hose
  5. EASY!Force high-pressure gun
  • Unscrew the container.
  • Plug the desired gate into the suction hose.
  • Fill the detergent into the container.
  • Screw the container onto the foam nozzle.
  • Remove the nozzle from the spray lance.
  • Connect the foam nozzle to the high-pressure gun and hand-tighten.
  • Start up the high-pressure cleaner.

Recommended cleaning method 

  1. Spray the detergent sparingly on the dry surface and let it work for a while (do not let it dry).
  2. Rinse off the loosened dirt with the high-pressure jet.

Rinsing out the foam lance

The foam lance must be flushed after use to prevent the formation of detergent deposits.

  1. Unscrew the container.
  2. Pour the remaining detergent back into the original packaging.
  3. Fill the container with clear water.
  4. Screw the container onto the foam nozzle.
  5. Operate the foam nozzle for approx. 1 minute to flush the detergent residue.
  6. Empty the container.

Interrupting operation

  1. Close the high-pressure gun, the device will switch off.
  2. Lock the high-pressure gun by pushing the safety latch of the high-pressure gun to the front.

Note
The water pressure in the high-pressure hose is re-duced by approx. 70% when the device is switched off. This reduces the actuating force of the high-pressure gun and extends the service life of the device.

Continuing operation

  1. Unlock the high-pressure gun by pushing the safety latch to the rear.
  2. Open the high-pressure gun, the device will switch on again.

Finishing operation

  1. Close off the water inlet.
  2. Open the high-pressure gun.
  3. Set the power switch to “I” and allow the device to run for 5 to 10 seconds.
  4. Close the high-pressure gun.
  5. Turn the power switch to “0/OFF”.
  6. Pull the mains plug out of the socket only when your hands are dry.
  7. Disconnect the water inlet.
  8. Open the high-pressure gun until the device is completely depressurized.
  9. Lock the high-pressure gun by pushing the safety latch of the high-pressure gun to the front.

Only with HD…M, HD…MX: Storing the device

  1. Fit the spray lance with high-pressure gun into the spray lance holster and latch into position in the spray lance holder.
  2. Wind the mains cable onto the cable clips.
  3. HD…M: Wind on the high-pressure hose, hang it over the hose storage compartment and secure with the rubber band. HD…MX: Wind the high-pressure hose onto the hose reel and fold over the crank handle.
  4. Press the push handle lock and slide in the push handle.

Frost protection

ATTENTION
Frost destroys the device if it is not completely drained of water. Store the device in a frost-free location.
If frost-free storage is not possible: 

  1. Drain the water.
  2. Pump commonly available anti-freeze through the device.
  3. Allow the device for run for a maximum of 1 minute until the pump and lines are empty.

Note
Use commonly available, Glycol-based vehicle anti-freeze. Observe the handling instructions of the anti-freeze manufacturer.

Transport

CAUTION
Risk of injury, risk of damage
Be aware of the weight of the device during transport.

ATTENTION
Risk of damage
Protect the trigger of the high-pressure gun from damage.

  1. When transporting in vehicles, secure the device against slipping and tipping over according to the applicable guidelines.
  2. Pull the device behind you via the push handle for transporting over longer distances (not with HD…M St).
  3. Pull the device step by step when ascending stairs. The skids protect the casing from damage (not with HD…M St).

Only with HD…M, HD…MX: Transport retainer for surface cleaner 

  1. Plug the connection nozzle of the surface cleaned onto the transport bracket on the high-pressure cleaner.
  2. Screw on the union nut by approximately 1 turn.

Storage

CAUTION
Risk of injury, risk of damage.
Be aware of the weight of the device during storage.

  1. Store the device indoors only.

Care and service

DANGER
Risk of injury due to inadvertently starting up de-vice and also due to electric shock.
Switch off the device immediately and unplug the mains plug before performing work.

You can agree on regular safety inspections or close a maintenance contract with your dealer. Please seek ad-vice on this.

Each time before use

  1. Check the power cable for damage and have a damaged cable replaced immediately by the authorised Customer Service or a qualified electrician.
  2. Check the high-pressure hose for damage and re-place a damaged high-pressure hose immediately.
  3. Check the device for leaks. 3 drops of water per min-ute are permissible. Contact Customer Service in the case of more serious leaks.

Weekly 

  1. Clean the sieve in the water connection.

Clean the sieve in the water connection 

  1. Unscrew the union nut.
  2. Pull out the hose union with sieve.
  3. Externally clean and rinse the sieve.
    Note: Align the hex-head of the hose union for con-nection to the device.
  4. Fit the hose union with sieve.
  5. Tighten the union nut.
  • Unscrew the union nut.
  • Pull out the hose union with sieve.
  • Externally clean and rinse the sieve.
    Note: Align the hex-head of the hose union for con-nection to the device.
  • Fit the hose union with sieve.
  • Tighten the union nut.

Every 500 operating hours, at least annually 

  1. Have the device maintained by Customer Service.
  2. Changing oil.

Changing oil KARCHER HD 8-18-4 M St Vacuum Cleaner-FIG7KARCHER HD 8-18-4 M St Vacuum Cleaner-FIG8KARCHER HD 8-18-4 M St Vacuum Cleaner-FIG9

Note
See the “Technical data” section for the oil volume and type

  1. Unscrew the 4 screws.
  2. Remove the cover.
    Figure D
  3. Pivot the oil drain hose downwards over an oil catch pan.
  4. Pull the plug out of the oil drain hose.
  5. Remove the cap.
  6. Remove the foam from the oil tank.
  7. Wait until the oil has drained completely.
    Figure E
  8. Insert the plug into the oil drain hose.
  9. Pivot the oil drain hose upwards and latch in place.
  10. Fill with the measured correct quantity of oil.
  11. Insert the foam into the oil tank.
  12. Fit the cap and press firmly in place.
    Figure F 

Troubleshooting guide

DANGER
Risk of injury due to inadvertently starting up de-vice and also due to electric shock. Switch off the device immediately and unplug the mains plug before performing work. Have electrical components checked and repaired by the authorised Customer Service. In case of any malfunctions not mentioned in this chapter, contact the authorised Customer Service when in doubt or when you have been explicitly advised to do so.

Device does not start 

  • Check the power cable for damage.
  • Check the mains voltage.
  • If the device overheats:
    • Set the power switch to “0”.
    • Allow the device to cool for at least 15 minutes. c Set the power switch to “1”.
  • Contact Customer Service in the case of electrical faults.

Device does not reach required pressure

  • Check the size of the nozzle and compare with the required size specified in the “Technical data” sec-tion.
  • Vent the device, see section “Venting the device”.
  • Clean the sieve in the water connection.
  • Check the water supply volume and compare with the required volume specified in the “Technical data” section.
  • Clean the nozzle.
  • Contact Customer Service if necessary.

Pump leaking 

Up to 3 drops of water per minute are permissible.

  • In case of more serious leaks, have the device checked by Customer Service.

Pump knocking 

  • Check the water supply line for leaks.
  • Vent the device, see section “Venting the device”.
  • Contact Customer Service if necessary.

Detergent dosing volume too low

  • Refill the foam nozzle cup.
  • Plug a larger blender onto the suction hose.
  • Check the suction hose and foam nozzle for deter-gent deposits. Remove deposits using lukewarm water.

Accessories and spare parts

Only use original accessories and original spare parts. They ensure that the appliance will run fault-free and safely. Information on accessories and spare parts can be found at www.kaercher.com. 

Warranty

The warranty conditions issued by our relevant sales company apply in all countries. We shall remedy possi-ble malfunctions on your appliance within the warranty period free of cost, provided that a material or manufac-turing defect is the cause. In a warranty case, please contact your dealer (with the purchase receipt) or the next authorised customer service site. (See overleaf for the address)

Technical data

EC Declaration of conformity

We hereby declare that the machine described below complies with the relevant basic safety and health re-quirements of the EU Directives, both in its basic design and construction as well as in the version put into circu-lation by us. This declaration shall cease to be valid if the machine is modified without our prior approval.

  • Product: High-pressure cleaner
  • Type: 1.150-xxx

Currently applicable EU Directives

  • 2000/14/EC
  • 2006/42/EC (+2009/127/EC)
  • 2011/65/EU
  • 2014/30/EU

Harmonized standards used

  • EN 60335–1
  • EN 60335–2–79
  • EN 50581
  • EN 55014–1: 2006+A1: 2009+A2: 2011
  • EN 55014-2: 2015
  • EN 62233: 2008
  • EN 61000–3–2: 2014

HD 6/15, HD 7/16-4, HD 7/17, HD 8/18-4

  • EN 61000–3-3: 2013

HD 7/14-4

  • EN 61000–3-11: 2000

Applied conformity evaluation method 2000/14/EG: Appendix V
Sound power level dB(A) 

The undersigned act on behalf and under the power of attorney of the company management.

  • Documentation supervisor: S. Reiser Alfred Kärcher GmbH & Co. KG Alfred-Kärcher-Str. 28 – 40
  • 71364 Winnenden (Germany)
  • Tel.: +49 7195 14-0
  • Fax: +49 7195 14-2212 Winnenden, 2017-07-01

Documents / Resources

KARCHER HD 8-18-4 M St Vacuum Cleaner [pdf] Instruction Manual
HD 6-15 M, HD 6-15 MX, HD 6-15 M St, HD 7-17 M, HD 7-17 MX, HD 7-17 M St, HD 7-14-4 M, HD 7-14-4 MX, HD 7-16-4 M, HD 7-16-4 MX, HD 8-18-4 M, HD 8-18-4 MX, HD 8-18-4 M St, Vacuum Cleaner, HD 8-18-4 M St Vacuum Cleaner, Cleaner

References

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