Kärcher K 7 Full Control - Pressure Washer Manual

Description in this service manual

Service groups

Example:
Install/uninstall ANRA wheel axle

AN	RA	Install/uninstall wheel axle
Service group	Component	Activity

Observe the allocation of service groups to the appliance components in the overview diagram in Chapter "Overview over the service and functional groups".

Textual description

	Instruction
	Preparatory operations
1 2	Key numerical
A B	Key alphanumerical
•	Enumeration / General list

Safety note
Pointer to hazards, sources of errors.

Technical Features

• 3 piston axial pump with stainless steel piston
• Pressure relief system
• Electric motor with thermal motor protection switch.
• Retractable push handle
• Carrying handle
• Additional spray lance holder with fixation for transportation

Intended use

This high pressure cleaner is designed for domestic use only.

• for cleaning machines, vehicles, buildings, tools, facades, terraces, gardening tools, etc. by means of a high-pressure water jet (if necessary, with additional cleaning agents).
• with accessories, replacement parts and cleaning agents approved by KÄRCHER. Please observe the information accompanying the cleaning agents.

Field of application

This service manual describes the appliance family:

• K 7 Full Control

Safety installations

Safety devices serve to protect the user and must not be rendered in operational or their functions bypassed.
Observe safety information in the chapters!

Lock trigger gun

This lock locks the lever of the trigger gun and prevents the inadvertent start of the appliance.

Overflow valve with pressure switch

The overflow valve prevents the permissible working pressure from being exceeded.
If the lever on the trigger gun is released the pressure switch turns off the pump, the high pressure jet is stopped. If the lever is pulled the pump is turned on again.

Type plate

The type plate is located at the bottom of the appliance.

1. Serial number
2. IP rating/ protection class
3. Sound power level L_WA
4. Bar code. Contains part and serial number.
5. Address of manufacturer
6. Max. flow rate
7. Specifications
8. Part number
9. Appliance description

AB Service group setup

Safety information

Observe general safety information!
Service and maintenance tasks may only be performed by qualified and specially trained specialists.

• Switch off the appliance and, in case of appliances connected to the mains, pull out the power cord before cleaning and performing any maintenance tasks on the machine.
• Maintenance work may only be carried out by approved customer service outlets or experts in this field who are familiar with the respective safety regulations.
• To avoid risks, all repairs and replacement of spare parts may only be carried out by the authorised customer service personnel.
• Only use accessories and spare parts which have been approved by the manufacturer. The exclusive use of original accessories and original spare parts ensures that the appliance can be operated safely and trouble free.
• Allow the appliance to cool down prior to performing service tasks.

Overview

ABGH Uninstalling / installing casing
ABRD Uninstall / install wheels
ABSB Uninstall / install push handle
ABST Uninstall / install hose reel

Function

No special functional characteristics.

Service activities

Note
Unless otherwise described, the installation takes place in reverse order.

Uninstall/install hose reel

1. Hollow shaft
2. Safety clip
3. High pressure hose

Completely roll off the high-pressure hose from the hose drum.
Pull out the safety clip.
Remove the high pressure hose from the hollow shaft.

1. Hose drum
2. Safety disc

Remove the safety disc.
Pull off hose reel casing shells towards the front.

1. Bearings
   Hose drum
2. Safety disc
3. Rotating grommet

Remove the safety disc.
Pull off rotating grommet.
Pull off hose reel bearings.

Note
Check O-rings for damage.

Uninstalling/installing casing

• Uninstall/install hose reel

1. Screws
2. Base bolts
3. Base

Unscrew the screws.
Pull out the bolts of the base.
Take off the base.

1. Screws
2. Casing

Unscrew the screws.
Remove the housing.

Note
Use special tools.
Screwdriver bit T15
6.815-150.0

Torques	Nm
Screws	1,2...1,9

Uninstall/install wheels

1. Wheel
2. Safety disc
3. Axle

Remove the wheel cover.
Remove the safety disc.
Remove the wheel.

Note
The lock washer is destroyed upon removal.

Uninstall/install push handle

• Uninstalling / installing casing

1. Casing
2. Push handle
3. End piece
4. Screws

Pull the push handle upward.
Unscrew the screws.
Pull off end pieces.
Remove the push handle.

Maintenance and inspection

Service group does not contain any maintenance and inspection points.

Error diagnosis

The service group does not contain any error diagnosis.

Peculiarities/others

The service group does not contain any peculiarities.

AE Service group pump

Safety information

Observe general safety information!
Service and maintenance tasks may only be performed by qualified and specially trained specialists.

• Switch off the appliance and, in case of appliances connected to the mains, pull out the power cord before cleaning and performing any maintenance tasks on the machine.
• Maintenance work may only be carried out by approved customer service outlets or experts in this field who are familiar with the respective safety regulations.
• To avoid risks, all repairs and replacement of spare parts may only be carried out by the authorised customer service personnel.
• Only use accessories and spare parts which have been approved by the manufacturer. The exclusive use of original accessories and original spare parts ensures that the appliance can be operated safely and trouble free.
• Allow the appliance to cool down prior to performing service tasks.

Overview

AESG Uninstall / install valve gear casing
AEZK Uninstall / install cylinder head
AEKF Uninstall / install piston guide
AEVT Uninstall / install valves and seals
AETS Uninstall / install swash plate
AEKL Uninstall / install ball bearing and grooved ring
AERR Uninstall / install backflow valve detergent
AEUV Uninstalling / installing the overflow valve
AEWA Uninstall / install outer jacket of water channel

Function

No special functional characteristics.

Service activities

Note
Unless otherwise described, the installation takes place in reverse order.

Uninstall/install backflow valve detergent

• Uninstalling / installing casing
• Remove the pump kit.

1. High-pressure outlet
2. Screws

Unscrew the screws.
Remove high-pressure outlet.

Torques	Nm
Screw M6	8...9

1. Chemical valve

Remove chemical valve.

Installation information
Check O-ring for damage.

Uninstall/install valve gear casing

• Uninstalling / installing casing
• Remove the pump kit.
• Uninstall / install electrical box

1. Valve gear casing
2. Clip
3. Pipe return
4. Screws
5. Pressure pad

Remove the clip.
Remove pipe return.
Hold down piston guide.
Remove the screws.
Take off the valve gear casing.

Torques	Nm
Screw M6	9...11

Uninstalling/installing the overflow valve

• Uninstall / install valve gear casing

1. Overflow
2. O ring
3. Valve gear casing

Push the overflow valve down out of the valve gear casing.

Note
Check the O-ring. Replace if necessary.

1. Overflow
2. Valve gear casing
3. Tool
   e.g.
   Extension piece

Press overflow valve with tool into the retainer.

1. Overflow
2. Intake
3. Valve gear casing

Installation information
Insert the overflow valve up into the retainer up to the upper stop.

Uninstall/install cylinder head

The procedure conforms to the task:

• Uninstall / install valve gear casing

Uninstall/install valves and seals

• Uninstalling / installing casing
• Remove the pump kit.
• Uninstall / install valve gear casing

1. Pressure valve
2. Suction valve
3. Cylinder head

Replace valves and seals as necessary.
Pull out the upper parts of the pressure valve using valve pliers.

Lightly grease the O-rings.
Insert new pressure valves into the pump head.

Note
Drive the suction valves out of the cylinder head using a drift punch (Ø 6.0...6.4 mm).
Lightly grease the O-rings on the suction valves.

1. Cylinder head
2. Suction valve
3. Valve retainer

Insert new suction valves into the cylinder head.
Support the cage side of the suction valve by means of the valve retainer (special tool 2.901-049.0).

1. Drive mandrel
2. Suction valve
3. Cylinder head
4. Valve retainer

Flare the opposite side by means of the drive-in mandrel (special tool 2.901-049.0).

NOTE
If there is no possibility to flare the valves, the complete cylinder head can be ordered and replaced as a spare part.

1. Nut rings

Check nut rings, replace if necessary.
Do not cant the grooved ring.
Insert nut rings using the installation mandrel.

Uninstall/install piston guide

• Uninstall / install valve gear casing

1. Piston guide
2. Screws
   Pressure pad

Unscrew the screws.
Remove the piston guide and the piston.

Piston guide is tensioned by piston springs.

Pay attention to the correct fitting position during reinstallation.

1. Safety disc
2. Piston
3. Springs
4. Piston guide

Check piston for wear.
Check springs.

Observe piston condition diagram.
In case of a missing or poor condition diagram, the turning of the piston is not guaranteed.

Uninstall/install swash plate

• Uninstall/install piston guide

1. Motor flange
2. Screws

Drain and collect the oil.
Unscrew the screws.
Remove motor flange.

Note
The pressure disc and ball bearing are loosely supported.

Torques	Nm
Screw M5	5,5...7,5

1. Screw
2. Swash plate
3. Rotor

Fixate rotor.
Loosen screws.
Remove swash plate.

Amount of oil	ml
15W40	120
Torques	Nm
Screw M8	18...22

1. Ball bearing
2. Motor

Installation information
Rotor must sit as far into the ball bearing as possible.

Uninstall/install ball bearing and grooved ring

• Uninstall / install swash plate

1. Motor flange

Lay down the motor flange.
Tap out the grooved ring and the ball bearing.

Installation information
When inserting the grooved ring, lay the motor flange down flat.
Do not cant the grooved ring.
When pressing in the ball bearing, lay the motor flange down flat.

Uninstall/install outer jacket of water channel

• Uninstalling / installing casing
• Remove the pump kit.

1. Outer jacket of water channel
2. Screws

Loosen screws.
Remove outer jacket of water channel towards the bottom.

1. O ring
2. Intake
3. Web
4. Outer jacket of water channel

Check the O-ring. Replace if necessary.
Mind the installation position.
Web must be inserted as far as possible.

Maintenance and inspection

Service group does not contain any maintenance and inspection points.

Error diagnosis

The service group does not contain any error diagnosis.

Peculiarities/others

The service group does not contain any peculiarities.

AH Service group electrics

Safety information

Observe general safety information!
Service and maintenance tasks may only be performed by qualified and specially trained specialists.

• Switch off the appliance and, in case of appliances connected to the mains, pull out the power cord before cleaning and performing any maintenance tasks on the machine.
• Maintenance work may only be carried out by approved customer service outlets or experts in this field who are familiar with the respective safety regulations.
• To avoid risks, all repairs and replacement of spare parts may only be carried out by the authorised customer service personnel.
• Only use accessories and spare parts which have been approved by the manufacturer. The exclusive use of original accessories and original spare parts ensures that the appliance can be operated safely and trouble free.
• Allow the appliance to cool down prior to performing service tasks.

Overview

AHEK Uninstall / install electrical box
AHNK Uninstalling / installing mains connection

Function

No special functional characteristics.

Service activities

Note
Unless otherwise described, the installation takes place in reverse order.

Uninstall/install electrical box

• Uninstalling / installing casing
• Remove the pump kit.

1. Retaining clip
   Up
2. Retaining clip
   Down
3. Screw
4. Mains cable
5. Electronics system

Loosen screws.
Disconnect the mains connection cable.
Push the upper clip outwards.
Push the electrical box downwards.
Push the lower clip inwards.
Remove the electrical box.

1. Plug
2. Electrical box connection

Remove electrical box connection.
Remove the plug.

Uninstalling/installing mains connection

• Uninstalling / installing casing

1. Screw
2. Mains connection
3. Electronics system

Loosen screws.
Pull out the mains connection.

Maintenance and inspection

Service group does not contain any maintenance and inspection points.

Error diagnosis

The service group does not contain any error diagnosis.

Peculiarities/others

The service group does not contain any peculiarities.

Circuit diagram

When working on the device, please always use the current circuit diagram in DISIS.

230V 1~ 50Hz
240V 1~ 50Hz
100V 1~ 50Hz
100V 1~ 60Hz
120V 1~ 60Hz

M1 Motor
C1 Capacitor
S1 Pressure switch
F1 Thermostat contact

Special tools

Technical specifications

Electrical connection
Voltage	230 1~50	V Hz
Connected load	3,0	kW
Protection class	IP X5
Protective class	I
Maximum allowed net impedance	0,396 + j0,248	Ω Ω
Mains fuse (slow-blow)	16	A
Water connection
Max. feed pressure	0,6	MPa
Max. feed temperature	60	°C
Min. feed volume	12	l/min
Max. Suction height	0,5	m
Performance data
Working pressure	15	MPa
Max. permissible pressure	16	MPa
Water flow rate	9,2	l/min
Max. flow rate	10	l/min
Detergent flow rate	0,3	l/min
Recoil force of the trigger gun	23	N
Dimensions and weights
Length	463	mm
Width	330	mm
Height	667	mm
Weight, ready to operate with accessories	19,7	kg
Values determined as per EN 60335-2-79
Hand-arm vibration value Uncertainty K	5,7 1,1	m/s2 m/s2
Sound pressure level LpA Uncertainty KpA	80 3	dB(A) dB(A)
Sound power level LWA + Uncertainty KWA	96	dB(A)

Subject to technical changes.

Safety instructions

Service and maintenance tasks may only be performed by qualified and specially trained specialists. Observe safety information in the chapters!

Prior to all work on the appliance, switch off the appliance and pull the power plug.

Risk of damage by electrostatic discharge (ESD)! Take suitable measures for discharging electrostatic charge prior to performing work on the appliance electronics.

Hazard levels

For an immediate danger which can lead to severe injuries or death.

For a possibly dangerous situation which could lead to severe injuries or death.

For a possibly dangerous situation which can lead to minor injuries or property damage.

ATTENTION
Pointer to a possibly dangerous situation, which can lead to property damage.

Note
Indicates useful tips and important information.

If you should require supplements, have corrections or questions regarding this document, please address these citing the following subject to:
international-service@de.kaercher.com

Subject:

Fall 120851

The responsible product specialist will take care of your issue.

Copying and duplication of texts and diagrams as well as third-party access to this information is permitted only with the explicit permission of the company:

Alfred Kärcher GmbH & Co. KG
P O Box 160
D -71349 Winnenden
www.kaercher.com

Documents / Resources

References

• Cleaning equipment and pressure washers | Kärcher International

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