WOLFF NEO 400 User manual

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Dear Customer
You have chosen to purchase the Wolff concrete
grinding machine NEO 400 - the right choice when
it comes to quality and performance.
This operating manual contains important instructions
for operating the machine.
Attention!
Please read this operating manual carefully, and
ensure that all users read this manual before
operating the machine.
Observing the safety instructions protects against
situations that may endanger health and safety
and helps to prevent improper use of the machine.
Ensure that you are confi dent operating the machine
before commencing work.
During operation is too late!
Do not allow persons to operate the machine if they
do not possess the necessary expertise to do so.
Legend
Important instructions relating to safety and damage
prevention are indicated in this operating manual by
the following symbols.
Important instructions
Warning of general danger
Wear eye and ear protection
Wear respiratory protection
Wear safety gloves
Read the instructions/notices
Special waste
Translation of the original operating instructions
Warning
Concrete grinding machine Neo 400

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1.0 Product description
Important components of the machine
The numbering of the product features refers to the illustra-
tion of the machine on the graphics page 2-3.

1 Motor
2 Additional weight
3 Brush
4 Dust seal ring
5 Gas prop
6 Support wheel
7 Level regulation, carriage
8 Transport wheel
9 Star Grip, Track widening
10 Vacuum cleaner connection
11 Plug
12 Display current consumption
13 Allen bolt, adjusting grip
14 Emergency stop switch
15 Button, on
16 Handle adjustment
17 Grip
18 Handle
19 Electronic
20 Allen key with holding
Functional description
Please refer to the graphics on pages 2-3 while
you read the operating instructions.
Restriction of use
The fl oor grinding machine NEO 400 is designed ex-
clusively for dry grinding and milling of coatings and old
substrates.
When the machine is used in another way, it shall be
regarded as unfi t for the purpose. Uzin Utz Tools GmbH &
Co. KG shall not accept any liability for damage resulting
from nonintended use.
Declaration of Conformity
We declare under our sole responsibility that this product
is in conformity with the following standards of standard-
ization documents: DIN EN 1037, EN ISO 12100, DIN EN
60204-1, DIN EN 60745-1, according to the provisions of
the: 2006/42/EC, 2004/108/EC, 2006/95/EC.
Dipl.-Ing. (FH) Dieter Hammel
Authorised to issue this declaration and for the gathering
of the technical documentation.
01.04.2017 i.v.
Uzin Utz Tools GmbH & Co. KG | D-74360 Ilsfeld | Ungerhalde 1
Technical data
Power supply ..................................................3~/400 V A
Frequency................................................................50 Hz
Power consumption...............................................4,0 kW
Rotation speed ..............................................1.500 U/min
Width of grinding..................................................400 mm
Total weight ...........................................................125 kg
Additional weight......................................................15 kg
Includes:
1 Concrete grinding machine NEO 400
1 Spirit level
1 Hearing protection
1 Tool kit
1 Operation manual
A

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2.0 Safety Warnings
2.1 General Power Tool Safety Warnings
Read all safety warnings and all
instructions.
Failure to follow the warnings and instructions may result
in electric shock, fi re and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your
mains-operated (corded) power tool or battery-operated
(cordless) power tool.
1) Work area safety
a) Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b) Do not operate power tools in explosive atmosphe
res, such as in the presence of fl ammable liquids,
gases or dust.
Power tools create sparks which may ignite the
Dust or fumes.
c) Keep children and bystanders away while
operating a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power tools.
Unmodifi ed plugs and matching outlets will reduce
risk of electric shock.
b) Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators.
There is an increased risk of electric shock if your
body is earthed or grounded.
c) Do not expose power tools to rain or wet
conditions.
Water entering a power tool will increase the risk of
electric shock.
d) Do not abuse the cord. Never use the cord for car
rying, pulling or unplugging the power tool. Keep
cord away from heat, oil, sharp edges and mo-
ving parts.
Damaged or entangled cords increase the risk of
electric shock.
e) When operating a power tool outdoors, use an ex
tension cord suitable for outdoor use.
The use of a cord suitable for outdoor use reduces the
risk of electric shock.
f) If the operation of a power tool in a damp location
is unavoidable, use a residual current device (RCD)
protected supply.
The use of an RCD reduces the risk of electric shock.
3) Personal safety
a) Stay alert, watch what you are doing and usecom-
mon sense when operating a power tool. Do not
use a power tool while you are tired or under the
infl uence of drugs, alcohol or medication.
A moment of inattention while operating power tools
may result in serious personal injury.
b) Use personal protective equipment. Always wear
eye protection.
Protective equipment such as dust mask, non-slip
safety shoes and hearing protection used for appro-.
priate conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch
is in the off -position before connecting to power
source and/or battery pack, picking up or carrying
the tool.
Carrying power tools with your fi nger on the switch
or energising power tools that have the switch on
Invites accidents.
d) Remove any adjusting key or wrench before turn-
ing the power tool on.
Warning

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A wrench or a key left attached to a rotating part of the
power tool may result in personal injury.
e) Do not overreach. Keep proper footing and balance
at all times.
This enables better control of the power tool in unex-
pected situations.
f) Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves
away from moving parts.
Loose clothes, jewellery or long hair can be caught in
moving parts.
g) If devices are provided for the connection of
dust extraction and collection facilities, ensure
that these are connected and properly used.
Use of dust collection can reduce dust-related
hazards.
4) Power tool use and care
a) Do not force the power tool. Use the correct power
tool for your application.
The correct power tool will do the job better and safer
at the rate for which it was designed.
b) Do not use the power tool if the switch does not
turn it on and off .
Any power tool that cannot be controlled with the
switch is dangerous and must be repaired.
c) Disconnect the plug from the power source and/
or the battery pack from the power tool before
making any adjustments, changing accessories, or
storing power tools.
Such preventive safety measures reduce the risk of
starting the power tool accidentally.
d) Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained
users.
e) Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and
any other conditions that may aff ect the power
tool’s operation.
If damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained pow-
er tools.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control.
g) Use the power tool, accessories and tool bits etc.
in accordance with these instructions, taking into
account the working conditions and the work to be
performed.
Use of the power tool for operations diff erent from
those intended could result in a hazardous situation.
5) Service
a) Have your power tool serviced by a qualifi ed
repair person using only identical replacement
parts.
This will ensure that the safety of the power tool
Is maintained.
Machine-specifi c Safety Warnings
Safety warnings for grinding machines
Read all safety warnings, instructions,
illustrations and specifi cations provided
with this power tool.
Failure to follow all instructions listed below may
result in electric shock, fi re and/or serious injury.
► Do not use damaged insert tool. Before each
use, inspect the insert tool for chips and cracks.
If the power tool or wheel is dropped,
inspect for damage or install an undamaged wheel.
After inspecting and installing the insert tool,
position yourself and bystanders away from the
plane of the rotating wheel and run the power tool
at maximum no load speed for one minute.

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Damaged insert tools will normally break apart during
this test time.
► Wear personal protective equipment. Depending
on the application, use a face shield, safety
goggles or safety glasses. As appropriate,
wear a dust mask, hearing protection gloves.
The eye protection must be capable of stopping fl ying
debris generated by various operations. The dust mask
or respirator must be capable of fi ltrating particles
generated by your operation. Prolonged exposure
to high intensity noise may cause hearing loss.
► Keep bystanders a safe distance away from the
work area. Anyone entering the work area must
wear personal protective equipment.
Fragments of workpieces or of a broken accessory
may fl y away and cause injury beyond immediate
area of operation.
► Keep the power cord away from rotating applica-
tion tools
If you lose control of the power tool, the cord may be
cut or snagged and your hand or arm may be pulled
into the spinning accessory.
► Pay attention to metallic objects in the under-
ground
If the fl oor is provided with metal parts, they must be
removed before each grinding.
Additional safety warnings
Wear eyes and ear protection
► Use suitable detectors to determine if utility lines
are hidden in the work area or call the local utility
company for assistance.
Contact with electric lines can lead to fi re and electric
shock. Damaging a gas line can lead to explosion.
Penetrating a water line causes property damage or
may cause an electric shock.
► When working screed, use dust extraction. The
vacuum cleaner must be approved for the extrac-
tion of stone dust.
Using this equipment reduces dust-related hazards.
► When working with the machine, always hold it
fi rmly with both hands and provide for a secure
stance.
The power tool is guided more securely with both
hands.
► Never use the machine with a damaged cable. Do
not touch the damaged cable and pull the mains
plug when the cable is damaged while working.
Damaged cables increase the risk of an electric shock.
Noise/vibration information
Wear hearing protection.
Measurements determined in accordance with
EN 60745
The A-rated sound pressure level of the machine
is normally
Sound pressure level .........................dB(A) 90,2
Sound power level.............................dB(A) 101,2
Margin of error ..................................K=d +/- 1,5 dB
Wear hearing protection!
Overall vibration values
(vector sum of three directions)
determined in accordance with EN 60745:
Vibration emission level .....................ah = 4,1 m/s²
Margin of error .....................................K = +/- 1,5 m/s²
The vibration emission level indicated in this informa-
tion sheet has been measured in accordance with a
standardised test specifi ed in EN 60745 and may be
used to compare one tool with another.
It may be used for a preliminary assessment of exposure.
The declared vibration emission level represents the main
Warning

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EN
applications of the tool. However if the tool is used for
diff erent applications, with diff erent acces sories or poorly
maintained, the vibration emission may diff er. This may
signifi cantly increase the exposure level over the total
working period.
An estimation of the level of exposure to vibration should
also take into account the times when the tool is switched
off or when it is running but not actually doing the job. This
may signifi cantly reduce the exposure level over the total
working period.
Identify additional safety measures to protect the operator
from the eff ects of vibration include: main taining the tool
and the accessories, keeping hands warm, organisation of
work patterns.
3.0 Maintenance
3.1 Additional weight (D)
► Only the original weight may be used. Never use other
weights or add additional weights as these can cause
the machine to become overloaded!
► WOLFF recommends that no more than 2 additional
weights are used.
► Only WOLFF weights may be used. Fit additional
weight (2) at an angle and engage
3.2 Mounting segments (C)
► Information on quick exchange of grinding seg -
ments
- The grinding segments are inserted intothe groove
and wedged outward by hammering slightly (soft-head
hammer).
- When grinding, the centrifugal force presses the grin-
ding segments to the outside.
- To replace worn segments, strike them to the inside
with a gentle hammer blow.
When centered, they can be removed easily.
► Depending on the subsoil, diff erent numbers of dia-
mond segments can be used. By default, you use 4-9
segments. Always be fully aware that they are equally
distributed over the plate to avoid an imbalance.
3.3 Recommended segments (H)
► ES-segment: For preparing screed. For grinding
and removing sintered layers of screed and for
removing thin paint layers on soft mineral substra-
tes.
Diamond segment ES, grit 20 #56306
Diamond segment ES, grit 40 #56308
Diamond segment ES, grit 60 #56309
► PKD-segment: #48028
For aggressive removal of PU coatings, putty mass
and tile adhesives (for thick adhesive layers).
► BT-segment: For preparing concrete substrates
For grinding concrete, coatings and highgrade
compounds and for removing thin paint layers on
hard substrates.
Diamond segment BT, grit 20 #48038
Diamond segment BT, grit 40 #48041
Diamond segment BT, grit 60 #56303
► PKD-splinter segment #48036
For removing thin epoxy resin layers, paint,
synthetic resin, PU and dispersion adhesive. Well
suited for removing fl eece backing and textile
double backing. (On hard sub-surfaces only.)
3.4 Set level regulator/body carriage (E)
► The machine must be positioned horizontally when
sanding/milling segments are attached.
For this purpose, the transport wheel (8) can be read
justed through the elongated holes of the level control
(7).
If the sanding segments have been used up, then
the machine may also be re-adjusted via the level
regulator (7) and positioned horizontally again.
The position may be checked using the provid
spirit level on the motor head.

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3.5 Support wheel (A)
► When working on soft surfaces, the support wheel (6)
can be mounted. It prevents the machine from immer-
sing too deeply.
3.6 Dust extraction
► Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful
to one’s health. Touching or inhaling the dusts can
cause allergic reactions and/or lead to respiratory
infections of the user or bystanders.
Certain dusts are considered carcinogenic, especially
in conjunction with additives. Material containing
asbestos may only be handled by specialists.
– Use dust extraction whenever possible.
– Provide for good ventilation of the work area.
– The use of a P2 fi lter class respirator is recommended.
Observe the relevant regulations in your country for the
materials to be worked.
The vacuum cleaner must be approved for the extrac-
tion of masonry dust. WOLFF provides:
High performance vacuum cleaner T-REX # 13314
Insert the suction hose of the vacuum cleaner in
the adapter (10) of the machine.
4.0 Use
Starting Operation
► Observe correct mains voltage! The voltage of
the power source must match the voltage specifi ed
on the type plate of the machine.
4.1 Handle height adjuster (I)
► The handle height adjuster (16) may be used to set
a comfortable working height.
By pressing the pressure switch (16), the height /
inclination of the stem can be adjusted.
4.2 Handle height adjustment (B)
► Loosen the allen bolts (13) with the supplied
allen key (20) to adjust the grip.
4.3 Switching On/Off application (G)
1. Move the handle to the working position via the handle
height adjuster (16). (I)
2. Lift the machine by applying light pressure to the hand-
le to allow the motor to start up without load
3. Turn the switch (15) to the right, the motor starts up
4. Set the machine down carefully.
5. Switch off by turning the switch to the left
► The machine can be stopped immediately with the
emergency stop (14).
Check the direction of rotation of
the motor (J). Switch the phases
in the plug, if required. The fan wheel must rotate
in an anticlockwise direction.
4.4 Power consumption (F)
The display (12) indicates the power consumption.
(amps)
3 LEDs light up green:
► Machine operational, no faults.
LED light up yellow:
► Machine in overload range
LED light up red:
► Machine shutdown imminent
► Overload protection triggered
Warning

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5.0 Ending the work
► After completion or interruption of work, make sure
that the machine is level and does not tilt back-
wards. To counteract a deformation of the still
hot rubber coupling.
► After ending the work and when leaving the machi-
ne, the mains plug-in must always be removed
from the power outlet.
6.0 Maintenance
6.1 Maintenance and Cleaning
► Before any work on the machine itself, pull the
mains plug.
► For safe and proper working, always keep the ma-
chine and ventilation slots clean.
► Clean the cooling fi ns of the motor and electronic
system on a regular basis.
Once work has been completed, the clamping devices
must be disassembled and the machine cleaned.
The machine must then be sent to an after-sales Ser-
vice agent. Addresses are listed in the Section “After-
sales service and customer assistance”.
If the machine should fail despite the care taken in
manufacturing and testing procedures, repair should
be carried out by an after-sales service centre for
WOLFF power tools.
In all correspondence and spare parts orders, please
always include the machine number specifi ed on the
type plate of the machine.
6.2 Spare parts
Spare parts can be found on the internet at:
http://webcatalog.wolff -tools.com
7.0 Trouble shooting
Fault Possible cause Remedy
8.0 Disposal information
Disposal
The machine, accessories and packaging should be sorted
for environmental-friendly recycling.
Only for EC countries:
Do not dispose of power tools into household waste!
According the European Guideline
Machine does
not run smoo-
thly
Imbalance The segments have
not been distributed
evenly over the seg-
ment disc
Machine
does not
start
Power supply
disconnected
blown fuse
defective cable or
plug
Emergency stop is
locked
Machine overloa-
ded
Have machine
repaired by a quali-
fi ed electrician,
resp. change parts
Unlock by turning to
right
Tilt the machine over
the transportation
wheels. The plate is
unloaded. Slowly on
the fl oor
Machine
switches off
during work
Machine overloa-
ded
After work, with red
LED:
Wait until the motor
has cooled down,
apply more diamond
segments if required
to reduce the sanding
pressure, and remove
additional weights if
required

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2002/96/EC for Waste Electrical and Electronic
Equipment and its implementation into national
right, power tools that are no longer usable
must be collected separately and disposed of in
an environmentally correct manner.
Subject to change without notice
9.0 Guarantee
The guarantee period for new Wolff machines is one year
from the time of delivery/transfer to the customer, unless
another period applies pursuant to mandatory legal regu-
lations.
When making a claim under guarantee, the invoice and/or
proof of purchase must be provided.
All repairs covered by the guarantee must be carried out
by a Wolff service shop recognised by us. Repairs which
are carried out by the customer and/or improperly automa-
tically lead to a disentitlement from guarantee claims. The
same is true of improper operation and/or use.
Replacement of parts, accessories and other modifi ca-
tions to Wolff machines
Wolff machines provide users with a high degree of safety
and reliabiity. To maintain this, the condition of your Wolff
machine may not be changed from that on the date it was
delivered from the factory without observing the following
rules. These rules apply for the replacement of parts, the
addition of accessories and other technical changes.
 All work done on your Wolff machine must be carried
out exclusively by a specialist workshop
which has suitably trained and experienced staff and
the working materials required. For this, we
ecommend an authorised Wolff service shop.
 In the event that parts are deliberately replaced, acces-
sories are deliberately added or other technical
changes are deliberately carried out, the customer
must always consult an authorised Wolff service
shop or us, the manufacturer, before starting the work.
 We urgently recommend only using safety-checked
original Wolff spare parts and original Wolff
accessories which have been cleared by us, the
manufacturer. These spare parts and accessories can
be purchased from your authorised Wolff service shop,
which will also be pleased to assemble them for you
properly.
Original Wolff spare parts and Wolff accessories
have been specially tested for their safety and
suitability for Wolff machines.
We can not suffi ciently judge the safety and sui
tability of spare parts and accessories which are
not original Wolff parts, and are thus unable to
vouch for them.
 To maintain operating reliability and avoid damage,
in the case of technical changes – of whatever
kind – our technical guidelines are to be observed in e
very case. Please also contact us at any other time if
you have any questions about your Wolff machine.
We can not assume any liability for damages caused
as a result of improper work and/or violation of the
above terms and conditions.