HAKO Scrubmaster B400 R User manual

Scrubmaster B400 R / RM / RH (7190)
Operating manual
Part number 88-10-3255 -
Valid as from: 03.2021

2Scrubmaster B400 R (7190)
Introduction
Foreword
We are certain that the excellent qualities of the machine will justify the faith
you have shown in us by your purchase.
To guarantee safe working with the machine, please read the Safety Notes
chapter before putting it into service.
Your own safety, as well as the safety of others, depends essentially on your
ability to control the vehicle. Please read this original operating manual
before you use the vehicle for the first time, act accordingly and keep these
instructions for future reference or subsequent users. The operating manual
contains all important information for operation, maintenance and servicing.
We have provided the points in this operating manual concerning your safety
with danger pictograms. Your authorised Hako dealer is available at all times
to answer further questions about the vehicle or the operating manual.
We would expressly advise you that no legal claims may be asserted based
on the contents of this operating manual. In the case of necessary repair
work, please make sure that only original spare parts are used. Spare parts
must be original spare parts to guarantee safety. We reserve the right to make
changes in the interests of further technical development.
Hako GmbH
23843 Bad Oldesloe, Germany
Hamburger Str. 209-239
Phone [phone]
Issue:
Index Book number Change no. Valid as from:
0 88-10-3255 03.2021
Introduction

Scrubmaster B400 R (7190) 3
Intended use
In the basic variant B400 R, the Scrubmaster is just a scrubber-drier for the wet
cleaning of hard indoor floor surfaces. This machine is intended for commercial
use, e.g. in shopping centres, airports, industrial plants and warehouses. In the
variants B400 RM and B400 RH, the Scrubmaster also has a sweeping func-
tion for picking up dry and moist dirt. These two variants are additionally intend-
ed for use in multi-storey car parks, pedestrian zones and car parks, for
example. Any use extending beyond this is not intended use. The manufacturer
is not liable for any damage resulting from this; the operator alone bears the
risk. Intended use also includes compliance with the operating, maintenance
and repair conditions specified by the manufacturer in this operating manual.
The Scrubmaster B400 R may be used, maintained and repaired only by per-
sons who are familiar with this work and have been briefed and instructed
about the dangers. Repairs and maintenance work not described in this
operating manual may only be carried out by the specialists of a Hako service
workshop.
The relevant accident prevention regulations as well as the other generally rec-
ognised safety engineering and occupational medical rules must be complied
with.
By virtue of its design and construction as well as in the version distributed by
us, the machine meets the usual health and safety requirements of the EC
Directives (see Declaration of Conformity). This Declaration of Conformity los-
es its validity in the event of a modification to the machine not authorised by us.
The manufacturer is not deemed liable for any damage resulting from unau-
thorised modifications to the machine.
Notes on warranty
The terms defined in the purchase agreement apply. Claims for compensation
in relation to damage are excluded from the terms of the warranty when the
damage is the result of the failure to observe rules concerning servicing and
maintenance. Maintenance work must be carried out by a Hako service work-
shop and confirmed in the service booklet under the item Maintenance Re-
port. The service booklet serves as a warranty logbook.
The following are excluded from the terms of warranty: Natural wear and tear
through overuse, defective fuses, improper handling, misuse and unauthorised
modifications. Claims under the terms of the warranty are also annulled when
damage occurs to the machine resulting from the use of parts or accessories
not explicitly approved of by us or from failure to observe maintenance rules.
Introduction

4Scrubmaster B400 R (7190)
Acceptance of the machine
Inspect the machine immediately on delivery for signs of transport damage.
You will be compensated for transport damage provided you immediately have
the damage confirmed by the transport company and send in the damage re-
port together with the consignment note to your Hako dealer:
Machine data
Your machine is described clearly by the following data. Please always quote
these data in correspondence or when making a telephone query to your
authorised Hako dealer or our company.
Vehicle type:
Vehicle ID no.:
Start-up on:
Please enter the data applicable to your machine in the list above. The data is
immediately available in the case of enquiries or spare parts orders.
Your nearest authorised Hako dealer:
Address:
Telephone:
Introduction

Scrubmaster B400 R (7190) 5
Introduction..................................................................... 2
Foreword ......................................................................... 2
Intended use .................................................................... 3
Acceptance of the machine ............................................. 4
1 Safety instructions ....................................................... 10
1.1 Warning and danger symbols ....................................... 10
1.2 Staff qualification .......................................................... 11
1.3 Protective equipment .................................................... 12
1.4 General safety instructions ........................................... 13
1.5 Operating safety instructions ........................................ 14
1.5.1 General ......................................................................... 14
1.5.2 Before putting into service ............................................ 15
1.5.3 During operation ........................................................... 15
1.5.4 After operation .............................................................. 17
1.6 Maintenance instructions .............................................. 18
1.7 Information about special risks ..................................... 21
1.7.1 Electrical system ........................................................... 21
1.7.2 Batteries ....................................................................... 21
1.7.3 Hydraulic system (B400 RH only) ................................. 22
1.8 Environmental protection instructions and disposal ..... 23
1.9 Labels on the machine ................................................. 24
2 Use ................................................................................. 28
2.1 Overviews ..................................................................... 28
2.1.1 Front view (B400 R) ...................................................... 28
2.1.2 Front view (B400 RM) ................................................... 30
2.1.3 Front view (B400 RH) ................................................... 32
2.1.4 Rear view ...................................................................... 34
2.1.5 Control panel ................................................................ 36
2.2 Controls and display elements ..................................... 38
2.2.1 Control panel ................................................................ 38
2.3 Multifunction display ..................................................... 47
2.3.1 Menu guidance ............................................................. 48
2.3.2 Main menu .................................................................... 48
2.3.3 Sub-menu ..................................................................... 57
2.3.4 Controls at the machine ................................................ 62
2.4 Functional description ................................................... 66
2.4.1 Solution tank ................................................................. 67
2.4.2 Rotating brush unit ....................................................... 67
2.4.3 Squeegee ..................................................................... 68
2.4.4 Waste water tank .......................................................... 68
2.4.5 Side wiper ..................................................................... 69
2.4.6 Suction turbines ............................................................ 69
2.4.7 Travel drive ................................................................... 69
Table of contents

6Scrubmaster B400 R (7190)
2.4.8 Brakes .......................................................................... 70
2.4.9 Batteries ....................................................................... 70
2.4.10 Sweeping roller (B400 RM/RH only) ............................. 70
2.4.11 Side broom (B400 RM/RH only) ................................... 71
2.4.12 Dirt hopper (B400 RM/RH only) .................................... 71
2.4.13 Filter system/Dust extraction system (B400 RM/RH
only) .............................................................................. 71
2.4.14 High-pressure cleaner (option) ..................................... 72
2.4.15 Steering column switch StVZO (option) ........................ 72
2.4.16 Working light, reversing camera with monitor and
flashlight (option) .......................................................... 73
3 Operation....................................................................... 74
3.1 Instruction ..................................................................... 75
3.2 Before putting into service ............................................ 75
3.3 Check list: Before machine start-up .............................. 76
3.3.1 Checking the working light, flashlight and warning
device (option) .............................................................. 77
3.3.2 Checking the lighting system and horn (option) ........... 78
3.3.3 Driver's seat .................................................................. 78
3.3.4 Steering wheel height adjustment (option) ................... 80
3.3.5 Side mirror (option) adjustment .................................... 81
3.4 Cleaning ....................................................................... 82
3.4.1 entry.X (option) ............................................................. 84
3.4.2 On-board dosing system (option) ................................. 85
3.4.3 Useful cleaning tips ...................................................... 87
3.4.4 Handling and braking the vehicle ................................. 88
3.4.5 Towing the machine ..................................................... 89
3.4.6 Turning off the machine ................................................ 93
3.4.7 Check list: After cleaning .............................................. 94
3.5 Loading and transporting .............................................. 95
3.6 Service information ....................................................... 97
4 Technical data............................................................. 100
5 Maintenance and servicing........................................ 106
5.1 Maintenance plan ....................................................... 108
5.2 Battery ........................................................................ 111
5.2.1 Checking the charging state ....................................... 111
5.2.2 Charging the battery ................................................... 112
5.2.3 Checking the acid level ............................................... 115
5.2.4 Changing the battery .................................................. 116
5.2.5 Battery plug coding ..................................................... 119
5.2.6 Maintaining drive batteries .......................................... 120
5.2.7 Taking the machine out of service for a long period ... 120
5.2.8 Disposing of batteries ................................................. 120
Table of contents

Scrubmaster B400 R (7190) 7
5.3 Solution tank ............................................................... 120
5.3.1 Filling the solution tank ............................................... 121
5.3.2 Emptying the solution tank ......................................... 123
5.3.3 Cleaning the solution tank .......................................... 124
5.3.4 Checking the seal at the drain hose ........................... 124
5.4 Waste water tank ........................................................ 125
5.4.1 Emptying the waste water tank ................................... 125
5.4.2 Cleaning the waste water tank ................................... 126
5.4.3 Cleaning the coarse dirt sieve .................................... 127
5.4.4 Cleaning the intake sieve ........................................... 128
5.4.5 Checking the seal at the drain valve ........................... 128
5.4.6 Cleaning and checking the seal in the tank cap ......... 129
5.5 Cleaning the fresh water filter ..................................... 130
5.6 Rotating brush unit ..................................................... 132
5.6.1 Changing the rotating brushes/pads ........................... 132
5.6.2 Cleaning the rotating brushes ..................................... 133
5.6.3 Decoupling the rotating brushes/pads ........................ 133
5.6.4 Coupling the rotating brushes/pads ............................ 134
5.7 Dirt hopper (B400 RM/RH only) .................................. 135
5.7.1 Emptying the dirt hopper (B400 RM only) .................. 135
5.7.2 Emptying the dirt hopper (B400 RH) .......................... 136
5.8 Pre-sweep suction unit (B400 RM/RH only) ............... 138
5.8.1 Changing the sweeping roller (B400 RM/RH only) ..... 138
5.8.2 Cleaning the sweeping roller and the sweeping roller
compartment ............................................................... 138
5.8.3 Removing the sweeping roller .................................... 139
5.8.4 Inserting the sweeping roller ....................................... 140
5.8.5 Adjusting the sweeping level ...................................... 141
5.9 Side broom (B400 RM/RH only) ................................. 142
5.9.1 Changing the side broom ........................................... 142
5.9.2 Adjusting the side broom ............................................ 143
5.10 Filter system/Dust extraction system
(B400 RM/RH only) .................................................... 144
5.10.1 Cleaning the plate filter ............................................... 144
5.10.2 Basic cleaning of the plate filter .................................. 145
5.11 Squeegee ................................................................... 147
5.11.1 Cleaning the squeegee ............................................... 147
5.11.2 Changing the sealing / slot strip ................................. 150
5.12 Side wiper ................................................................... 151
5.12.1 Changing the wiper rubber ......................................... 151
6 Attachments/options.................................................. 152
6.1 Light refuse collector (B400 R only) ........................... 152
6.2 Broom strip (B400 R only) .......................................... 152
6.3 Mop strip (B400 R only) .............................................. 152
Table of contents

8Scrubmaster B400 R (7190)
6.4 Spray suction tool ....................................................... 153
6.5 Manual suction tool ..................................................... 155
6.6 Spray nozzle ............................................................... 156
6.7 Battery changing system ............................................ 157
6.8 Overhead guard .......................................................... 162
6.9 BlueSpot ..................................................................... 163
6.10 Reversing camera ...................................................... 164
6.11 StVZO ......................................................................... 164
6.12 High-pressure cleaner ................................................ 166

Scrubmaster B400 R (7190) 9

10 Scrubmaster B400 R (7190)
Safety instructions
1 Safety instructions
1.1 Warning and danger symbols
Important tasks concerning the safety of the operating staff and machine are
named as follows in this operating manual and emphasised by symbols.
Danger
Indication of a direct danger with high risk, in which death or severe
physical injury occurs if the danger is not avoided.
Warning
Indication of a possible danger with average risk, in which death or
severe physical injury can occur if the danger is not avoided.
Caution
Indication of a danger with low risk, in which light physical injury can
occur if the danger is not avoided.
Attention
Attention indicates a danger that can lead to material damage or
technical damage to the device when not observed.
Environmental danger
Environmental danger due to the use of substances from which a
health and environmental risk proceeds.
Note
Indication of information that facilitates more effective and
economical use of the machine.

Scrubmaster B400 R (7190) 11
Safety instructions
1.2 Staff qualification
The various tasks described in this operating manual place different demands
on the qualifications of the persons entrusted with these tasks.
All work on and with the machine may only be carried out by qualified and
authorised staff. Staff are qualified if they have been trained, briefed or
instructed in the respective work.
A distinction is made between the following groups of people in this manual:
Operating staff: Have been demonstrably instructed in the operation
and functioning of the machine. Are also responsible for daily and weekly
maintenance and servicing work.
Specialists: Specialists in the sense of the operating manual are
persons who have been specially trained and instructed in the use of the
machine and who have relevant knowledge in the areas of start-up and
maintenance. In addition, specialists are familiar with the safety
equipment and instructions and are responsible for the initial instruction
of the operating staff.
Warning
Danger in case of insufficient qualification of persons!
Inadequately qualified persons cannot assess the risks involved
in handling the vehicle and expose themselves and others to the
risk of severe or fatal injury.
All work must only be carried out by qualified persons.

12 Scrubmaster B400 R (7190)
Safety instructions
1.3 Protective equipment
Personal protective equipment is used to protect the operating staff from
impairments to safety and health at work.
Operating staff must wear personal protective equipment during the various
operations on and with the machine, which is referred to separately in the indi-
vidual sections of this operating manual.
Dust masks
Dust masks protect the respiratory tract from inhaling dust.
Safety shoes
Safety shoes protect the feet from heavy falling parts and prevent
slipping on slippery surfaces.
Protective gloves
Protective gloves against mechanical abrasion protect the hands
against injuries such as cuts, abrasions, etc.
Defective or worn protective gloves must be disposed of in an
environmentally friendly manner.

Scrubmaster B400 R (7190) 13
Safety instructions
1.4 General safety instructions
 Before the machine is put into service, please carefully read the operating
manual provided as well as further separate instructions for additional
devices or attachments and observe them in all aspects of your work.
Moreover, the general safety and accident prevention regulations of the
legislation must be taken into account.
The machine may be used, maintained and repaired only by persons who
have been instructed by specialists.
 This machine is not intended to be used by persons (including children)
with reduced physical, sensory or mental capabilities. This also applies to
people without sufficient experience and skills.
 Children should be supervised to ensure they do not play with the machine.
 The operating manual should always be available at the machine's place of
use and should therefore be stored with the machine.
 Please hand over these documents to the new owner/operator on sale or
rental of the device. Have the hand-over confirmed!
 The warning, safety and instruction labels attached to the machine provide
important information for safe operation. Renew labels that are no longer
legible or present.
 Only wheels (wheel tyres) approved by Hako may be used.
 With Hako-AntiBac® machine variants, silver ions are contained in the
plastic of the tank on the inside as well as in the flex wall.
 Spare parts must be original spare parts to guarantee safety.
 Operation of mobile phones is only permitted when the machine is
stationary.
 It is not permitted to transport other people or heavy objects.
 Never use the machine without protection (overhead guard option) if there
is a possibility of the driver being hit by falling objects.
 When leaving the machine, remove the key to secure the machine against
unauthorised use.
 Do not operate the machine without properly mounted or installed safety
devices. Do not bypass the function of the safety devices (e.g. the seat
contact switch).
 Do not open covers and hoods during operation or when the machine is
running.

14 Scrubmaster B400 R (7190)
Safety instructions
1.5 Operating safety instructions
1.5.1 General
 The machine and the pre-sweep suction unit are not suitable for removing
combustible or explosive liquids, dust or materials that are hazardous to
health.
It is also prohibited to collect burning objects, e.g. glowing cigarettes.
The collection of wood dust, e.g. beech and oak dust, is also prohibited.
 The machine must not be used in potentially explosive atmospheres.
 Sturdy and slip-proof shoes must be worn when working with the machine.
 Only those surfaces approved by the contractor or its authorised represent-
ative for use of the machine may be driven on.
 Do not fill the tank with solvents or other aggressive chemicals.
 Only use detergents suitable for automatic machines (foam retarded) and
observe the application, disposal and warning instructions provided by the
detergent manufacturer.
 The machine is not suitable for collecting large quantities of water, e.g. in
the event of flooding.
 Manipulating the switches and protective devices is forbidden.
 For reasons of safety, the driver's seat is equipped with a seat contact
switch. The machine can only be started when the driver is sitting on the
driver's seat. The function of the seat contact switch must not be bypassed.

Scrubmaster B400 R (7190) 15
Safety instructions
1.5.2 Before putting into service
 Before initially starting up the machine, charge the used battery fully and
appropriately with commissioning charge. Please observe the operating
manual of the charger and the operating manual of the battery manufac-
turer. Hako assumes no liability for battery damage resulting from insuffi-
cient commissioning charge.
 Check proper condition and operating safety of the machine before every
start-up! Do not use the machine as long as there are defects. Eliminate
faults and defects immediately.
 Before starting work, the operating staff must familiarise themselves with all
equipment, operating and actuating elements as well as with their function.
It is too late to do this during operation!
 Before starting up, adjust the driver's seat so that the pedals can be
operated safely and in a relaxed manner.
 Before starting up, adjust the height of the steering wheel to ensure a
comfortable and relaxed hand and arm position.
 Before turning the machine off, always switch off all drives.
1.5.3 During operation
 When working with the machine, pay special attention to third persons,
especially children.
 When driving over thresholds, all working units must be switched off
beforehand.
 Excessive quantities of dust must be avoided when working with the pre-
sweep suction unit!
 Switch on the warning device (BlueSpot, flashlight, acoustic warning
reverse gear, etc.) (option) during all work and when transporting or moving
the machine.
 When transporting the machine, raise the squeegee and the brush unit.
 Adapt the driving style and speed to the ambient conditions, the local condi-
tions and the load condition of the machine.
 Three-wheeled vehicles have lower driving stability than four-wheeled
vehicles and therefore tend to have a higher risk of tilting over. The
following measures should be observed:
 Avoid sudden steering movements at higher speeds or excessive
speeds when turning.
 Only turn the machine on level surfaces.
 When driving uphill, downhill or across slopes, avoid sudden turns and
drive slowly into the bend.

16 Scrubmaster B400 R (7190)
Safety instructions
 Drive slowly on wet surfaces, particularly in bends, due to the risk of
skidding.
 Do not press the steering wheel against the end stop for too long. The
power steering could overheat and as a result the steering could become
much more sluggish.
 Use the brake button in case of danger.
 Never leave the machine unattended until it has been stopped and secured
against unintentional movement by removing the key.
Machine with standard drive:
 For cleaning purposes, the machine may only be used on a surface with a
maximum slope of 6 % for two minutes.
 Transport on slopes of up to 10 % may only take place for one minute and
with special caution.
 The machine must not be parked on an uphill or downhill gradient greater
than 10 %!
Machine with X-AC drive:
 Cleaning may only be carried out on slopes of up to 15 % for a duration of
up to three minutes.
 Transport on slopes of up to 18 % may only take place for a maximum
duration of two minutes.
 The machine must not be parked on an uphill or downhill gradient greater
than 15 %!
Dirt hopper (B400 RM/RH):
 Ensure there is sufficient ventilation when carrying out sweeping work in
enclosed rooms.
 Never exceed the permissible total weight and the permissible axle loads.
Check the filling level of the dirt hopper at regular intervals.
 Shaking the filter is only permitted with the dirt hopper inserted and closed.
Dirt hopper (B400 RH only):
 When raising and lowering the dirt hopper, there is a risk of crushing or
shearing for nearby persons.
Ensure a sufficient safety distance.
When raising and lowering the dirt hopper, there must be no persons,
animals or objects in the work area.

Scrubmaster B400 R (7190) 17
Safety instructions
High-pressure cleaner (option)
 There is a risk of injury.
The jet of the high-pressure cleaner must not be directed at persons.
 Depressurise pressurised parts (hoses, etc.) when taking the machine out
of service and before maintenance and repair work.
 Do not use high-pressure cleaners for cleaning electrical/electronic compo-
nents or the machine.
 Only use suitable extension lines approved by the manufacturer. If an
extension hose is used, the plug and coupling must be water-tight.
 Use only with the machine at standstill and the parking brake applied.
 Make sure that no unauthorised person is on or near the machine while
working with the high-pressure cleaner or other cleaning tools.
 Use the high-pressure lance only when standing on a firm surface, e.g. not
on ladders or from the driver's seat.
 The maximum operating pressure set by the manufacturer may not be
increased.
1.5.4 After operation
 Turn off the machine and remove the key when leaving the machine to
prevent unauthorised use.
 After use, park the machine in a dry, indoor location with the working units
raised.

18 Scrubmaster B400 R (7190)
Safety instructions
1.6 Maintenance instructions
 Daily and weekly maintenance work must be done in accordance with the
maintenance plan by instructed operating staff. For all other maintenance
work, please contact your nearest Hako service workshop.
 The maintenance work and maintenance intervals specified in the
operating manual service booklet must be complied with.
 Suitable tools and protective clothing such as protective gloves and safety
shoes must be used during cleaning, repair and maintenance work.
 Have the machine checked for safe condition by an expert in accordance
with the accident prevention regulations at appropriate intervals (we
recommend at least once yearly).
 Spare parts must at least comply with the technical requirements specified
by the manufacturer. This is guaranteed by original spare parts.
 Turn the machine off, remove the key and disconnect the battery plug when
cleaning and maintaining the machine and before replacing parts.
 Cleaning the machine with a water jet, high-pressure cleaner or steam jet is
not permitted!
 Application of aggressive and corrosive detergents for cleaning the
machine is not allowed.
 After cleaning, let the machine air dry, e.g. over the weekend. To do this,
leave the tank cap open.
 Only put the machine into service when all the protective devices are
attached and in protection position.
 Do not perform any welding, drilling, sawing or grinding work on parts of the
frame. Have damaged parts replaced by a Hako service workshop.
 When transporting the machine, the machine must be shut down and
properly lashed down.
 Detergents, oils and greases must be collected separately in suitable
containers and disposed of in accordance with local regulations. Spilled
substances must be cleaned up immediately.

Scrubmaster B400 R (7190) 19
Safety instructions
Changing the battery (standard)
 When raising and lowering the battery trough with a crane, there is a risk of
injury from falling and uncontrolled swinging parts.
The operator must be instructed by the owner in the operation of the crane
and informed of the risks associated with its operation.
Only use the attachment points provided.
When changing the battery trough, use a suitable battery changing cross-
beam (according to VDI 3616) and sufficiently load-bearing crane gear.
Do not hook in the chains at too shallow an angle, otherwise the tensile
forces in the chains can increase to several times the weight of the battery
and the chains may break.
Do not lower or place lifting gear and chains (according to VDI 3616) on the
battery cells.
Never use damaged crane gear.
Lifting hooks should not cause damage to battery cells, connectors or
connecting cables.
Keep a sufficient distance from the battery trough.
Attach the crane hook ensuring it is centred over the battery trough.
Carefully lift the battery trough and ensure that the battery trough does not
tip over. Change the attachment point if necessary.
Wear safety shoes and protective gloves.
Changing the battery (battery changing system  option)
 Wear safety shoes when changing the battery.
 Risk of crushing at the roller supports on the vehicle and on the battery
changing rack.
Do not touch the roller supports on the vehicle and on the battery changing
rack while the battery is moving!
 Risk of crushing when lifting and lowering the battery changing rack.
Do not reach between the lift truck and the battery changing rack when
lifting.
Do not touch the contact surfaces.
When lowering the battery changing rack, keep sufficient distance to the
feet of the battery changing rack!
 Risk of crushing while the battery is moving.
Do not stay in the battery changing rack while the battery is moving!
 Change the battery only on level ground, never on sloping or uneven
ground.

20 Scrubmaster B400 R (7190)
Safety instructions
Dirt hopper (B400 RM/RH only):
 Shaking the filter is only permitted with the dirt hopper inserted and closed.
 Only tip out the hopper from a possible low height in order to prevent the
formation of dust.
 The dirt hopper must be cleaned at regular intervals to prevent the accumu-
lation of bacteria.
Dirt hopper (B400 RH only):
 For high dump of the dirt hopper, the machine must be parked on a level
and solid surface.
 The dirt hopper may be raised only in the direct vicinity of the container.
 When the dirt hopper is raised, only drive at creep speed. Avoid abrupt
steering movements or braking.
Waste water treatment (option)
 To clean the filter system of the waste water treatment, turn off the machine
beforehand and remove the key switch.
High-pressure cleaner (option)
 Depressurise pressurised parts (hoses, etc.) when taking the machine out
of service and before maintenance and repair work.
 Do not use high-pressure cleaners for cleaning electrical/electronic compo-
nents or the machine.
 In winter and if there is a risk of frost, drain the water completely from the
high-pressure cleaner.