Blastrac BG-250RS User manual

Original instructions in English
OPERATING INSTRUCTIONS
BG-250RS
VERSION 1.1

2
Inspection comments
Recurring inspections / maintenance log
*Competent person
Date / Hour counter
Findings
Repairs / Cleaning
Test
on
By*
Inspection before initial operation on: __________________________________________
By: __________________________________________
Date of initial operation: __________________________________________
Serial number & Year of manufacture: __________________________ _____________

3
Table of contents
Maintenance log 2
1. Introduction 4
2. Machine description 4
Accessories 5
3. Safety 5
3.1 Work area safety 5
3.2 Electrical safety 6
3.3 Personal safety 6
3.4 Machine safety 6
3.5 Grinding safety 7
3.6 Dust collector safety 7
3.7 Asbestos safety 8
3.8 Maintenance safety 8
3.9 Transport safety 9
3.10 Signs on the machine 10
4. Initial operation 11
4.1 Checkpoints of electrical safety 11
4.2 Checkpoints of machine safety 11
4.3 Checkpoints of work area 11
4.4 Manual moving of the machine 12
4.5 Changing the diamond disc 13
5. Operating 14
5.1 Working with the BG-250RS Remote System 14
5.2 Operating during grinding 15
5.3 Switching off the BG-250RS 15
6. Maintenance 16
6.1 Replacing the flexible coupling: 18
6.2 Other maintenance 18
6.3 Remote control maintenance 19
7. Troubleshooting 20
8. Technical data 21
Contact

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1. Introduction
Before use, operators must be provided with information, instruction and training for the use of the machine
and the substances for which it is to be used, including the safe method of removal and disposal of the
material collected. All persons who are working with or maintaining this machine must read the manual
carefully and understand it fully. In case you sell the unit, hand it on to the next owner.
Keep this manual always with the machine, to enable it to be referred to at any time.
Any other work not covered by this operating manual must not be carried out.
This machine is designed for industrial use by professionals. Only authorized and trained personnel may
operate this machine. This machine is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge. Blastrac BV offers a course on
the use of the machine in order to make the operating and maintenance personnel familiar with all elements of
the machine. Always use common sense when working with machines.
2. Machine description
The Blastrac grinding machine BG-250RS is an electrical driven, remote controlled floor grinding machine for
treating horizontal surfaces. The machine has a rotating adapter plate where the diamond disc can be fixed on
The rotating parts are covered by a protection cap with a connection for a dust hose.
Due to the drive motors and the wireless control unit this machine is very effective and ergonomic to operate.
The machine may not be used without an adequate dust extraction system. A specially designed Blastrac dust
collection system ensures dust-free operation of the machine and clean air at the workspace.
The BG-250RS can be used on almost any floor to plane, to remove coatings or glue residues or to make ready
for coatings. This machine may not be used on wood.
1
Remote control
7
Floating shroud
13
Electrical connection
2
Steer handle
8
Drive wheel with quick release
pin
14
Drive motors
3
Dust hose connection
9
Power available light
15
4
Electrobox
10
Emergency stop button
16
5
Grinding motor
11
ON/OFF switch
17
6
Machine support/ transport wheel
12
Quick release pin for steer
handle
18
1
2
3
4
5
7
8
9
10

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Accessory’s
There are several types of discs that may be used on this machine.
The discs that can be used are:
E01419 Diamond disc 250mm soft Red
E01402 Diamond disc 250mm middle Green
E01417 Diamond disc 250mm hard Blue
BG707114 250mm black star grinding disc
BG707250 250mm PCD grinding disc
005014 10m suction hose ø76mm
3. Safety
Warning!
Read all safety warnings and all instructions. Failure to follow the warnings and
instructions may result in electric shock, fire, explosions and / or serious injuries.
Only authorized and trained personnel may operate this machine. This machine is not intended for use by
persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and
knowledge.
It is the responsibility of the user to analyse the surface to be treated. The surface may not contain any
substances which could pose a fire-, explosion- or health risk when treated. The user should make a risk
assessment on the basis of the information obtained about the surface to be treated and take proper
precautions for the work to be performed.
In case of any inappropriate usage, improper operation or repair, the producer shall be exempt from liability.
3.1 Work area safety
a) Do not use the machine in rain, damp or wet locations.
b) Avoid dangerous environments: do not work in the presence of explosive atmospheres, in the presence of
flammable liquids, gases or dust. Remove materials or debris that may be ignited by sparks.
c) In some cases sparks could be created by grinding.
d) The surface to be treated must be clean, make sure to remove all stones, screws etc..
Any stones, screws, bolts, pieces of wire etc. could cause serious damage to the machine if it gets inside
the machine!
e) Make sure there is enough ambient light on the work area. Cluttered or dark areas invite accidents.
f) Keep children and bystanders away while operating the machine. They are likely not to foresee the
potential dangers of the machine. Distractions could cause you to lose control of the machine.
g) Persons who are not operating the machine must not be permitted to stay in the surrounding area of at
least 5 meter from the machine.
h) Never use the machine when the surface is not clear and if there is a risk of stumbling or tripping.
i) Remove electrical cables and dust hose(s) from the surface to be treated.
j) Make sure that there are no cables or hoses in the driving direction of the machine.
k) Make sure that there is nothing standing or situated on the surface to be treated.
l) Never stay in the rain with the machine.
m) Check if there are any obstacles that can snag the cables when the machine is moving.
n) Remove all objects from the surface that can damage the machine. Remove reinforcing steel or other
objects protruding from the surface in order to prevent damage to the compounds or diamond discs.
o) Warning! Make sure that the surface to be treated does not contain dangerous materials such
as: - combustible or explosive dusts or substances.
- carcinogenic or pathogenic substances. (Except for the Asbestos version.)
p) It is necessary to provide for an adequate air change rate L in the room if the exhaust air is returned to
the room. Comply with the National regulations.
q) Secure the work area around the machine in public areas providing an adequate safety distance from the
machine. Use a red and white safety chain and danger sign to enclose the work area.

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3.2 Electrical safety
a) Use only extension cables for extending the main cable that are sized and marked in accordance with the
overall power consumption of the machine. Do not use damaged extension cables.
b) Electrical cables must be rolled entirely off of the reels.
c) Any damage to the electric cables and/or electrical components is not permitted.
d) The voltage on the identification plate must comply with the power supply.
e) Use an electrical power supply connection with earth connection and earth leakage circuit breaker.
f) The circuit breaker of the power supply must have a ‘’D’’ characteristic. Circuit breakers with a “C” or “B”
characteristic can give problems when switching the machine on.
g) Keep the machine original; The machine is always equipped with an earthed connection, do not
change this and always use earthed cables with an earthed plug.
h) Inspect and test the electrical components regularly. The electrical components have to satisfy with the
requirements set out in the harmonised norm EN60204-1.
i) Always call a skilled electrician or your distributor when you have questions about the safety of the
electrical components.
j) Work on electrical equipment or operating materials may only be undertaken by a skilled electrician or by
trained persons under the guidance and supervision of a skilled electrician as well as in accordance with
the electrical engineering regulations.
k) Always use tools that are insulated against voltages.
l) Do not abuse the cables. Never use the cables for carrying, pulling or unplugging the machine. Keep
cables away from heat, oil, sharp edges or moving parts. Damaged or entangled cables increase the risk
of electric shock. Do not fold the cable or clamp it.
m) Don’t pull out the power supply cable out by the wire, but by the connector.
n) Be careful with water on the treated surface. Electrical cables must not come into contact with water.
o) The main power switch on the machine must be in the “Off” position before connecting to the power
supply.
p) During a long standstill of the machine, pull out the main plug.
q) If the machine is to be operated using power from a generator, the generator must be operated in
accordance with the current legal regulations and directives in force. (this applies to the protective earth
conductor in particular) in order to ensure that all safety devices are functioning and to eliminate possible
damage to electrical components.
3.3 Personal safety
a) Always wear Personal Protective Equipment while working with the machine.
-Dust mask class FFP3 or higher
-Ear protection
-Safety glasses with lateral protection
-Protecting gloves
-Safety shoes
b) Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from
moving parts.
c) Personnel must tie back long hair and not wear loose clothing or jewellery including rings.
d) Stay alert, watch what you are doing and use common sense when operating the machine.
e) The remote control should always be fastened around the waist.
f) Push the emergency stop button before any inspections, adjustments and/or maintenance work is
started.
g) Always seek professional medical attention immediately in case of injury.
h) All persons surrounding the machine should wear Personal Protective Equipment.
3.4 Machine safety general
a) Safety functions and operating functions must work correct.
b) No loose bolts and nuts permitted.
c) Never operate machine without the guards and/or safety devices in place.
d) Never change anything on the safety devices on the machine!
e) Do not use the machine when it is damaged.
f) Do not open or remove protective guards while driving gears are running.
g) The machine, specially the handle grips must be dry and free of fats/oils.

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h) If the length of the brushes is, due to wear, less than 5mm or they are extremely deformed, the brushes
have to be replaced. Check the Service Manual for the order numbers.
i) All repair work has to be done by qualified Blastrac personnel, this guarantees a safe and reliable
machine.
j) Always use original Blastrac spare parts, grinding disks and polishing pads. This will ensure the
best performance.
Only original parts meet the factory specifications and quality. Otherwise Blastrac BV cannot guarantee
the safety of the machine.
The part numbers can be found in the Service Manual.
k) Check the rotating direction of the motor before operation. The correct direction is given with an arrow on
the housing of the motor.
l) If safety-critical changes occur to the machine or its working method, the machine must be shut down
immediately! The cause of the fault must be established, and rectified.
m) In the event of operational malfunctions the machine must be shut down immediately and secured!
n) Never use the machine without a suitable (Blastrac) dust collector!
3.5 Grinding safety
a) The machine contains rotating parts, which are protected with a cover. Always leave the diamond disc on
the floor while the motor is turning.
b) The flexible coupling can become worn out with use, because of this there can be higher vibrations than
normal. Check for this reason the flexible coupling for deformation and damage before every use.
c) Do not let the machine rest on the diamond disc or coupling when it is not in use, this will cause
deformation to the flexible coupling.
d) Always put the machine on the machine support/transport wheel which is made especially for this reason.
e) Make sure the brush seals are in good condition, this to avoid dust escaping.
f) Make sure the diamond disc is not damaged or worn out.
g) Always pull out the main plug before u start changing the grinding disks or polishing pads.
h) When mounting or removing a diamond disc; lay down the machine so it is lying on the handle. Make sure
the machine will not fall back down. A second person can hold the handle down, to make sure it will not
fall back down.
i) When changing the disks u should wear Personal Protective Equipment like a dust mask, safety goggles,
gloves, protective shoes, and close fitting protective clothing.
Use the vacuum cleaner while changing the discs to prevent excessive dust.
j) Caution! The grinding disc will heat up during grinding, don’t risk getting burned, always wear
protective gloves when handling them!
k) The machine contains rotating parts; because of this never pull the machine backwards with a turning
motor.
l) Be careful with the machine and pull or let down the machine slowly, big shocks can damage the electrical
parts.
3.6 Dustcollector safety
a) Always use a Blastrac dust collector to ensure a dust-free operation of the machine and clean air at the
workspace. Also the airflow helps to cool the machine and prevents overheating.
b) When working on or around carcinogenic or pathogenic substances, the dust collector must be fitted
with a HEPA filter.
c) Read the operating instructions of the dust collector before using it.
d) The dust container/bag of the dust collector must be emptied regularly. Comply with the local waste
treatment regulations considering the removed material.
e) The dust hose must be connected properly with a hose clamp and industrial tape.
f) The dust hose must be undamaged and free of obstructions.
g) Always switch on the dust collector first!

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3.7 Asbestos safety
a) Always check and comply with the local authorities and regulations!
b) Employees that are responsible for the execution of the asbestos removal must be trained and certified
accordingly.
c) Operators and other third parties that are involved in asbestos removal and in that context are present in
the work area must have sufficient knowledge of the risks with respect to asbestos.
d) Such persons must (according to the labour regulations) proven to be instructed (information and
education) about the health risks of working with (or at) asbestos (removal) and the measures for
personal protection with regard to possible exposure to asbestos.
e) The operator must know the usual procedures when leaving the working area, including the visual
inspection en cleaning of the machine being used.
f) The operator must use respiratory protection which is sufficient for work with asbestos, and must have
knowledge of the correct HEPA filters that are to be used.
g) If there is a possibility that asbestos fibres are released, they shall be collected at the exit or point of
origin and then be disposed of without risk to human and environment according to the local regulations.
h) If it is not possible to completely collect the contaminants, additional ventilation and filtration measures
must be taken.
i) At the end of work the complete machine including the dust collector, tools, work equipment and the work
area must be carefully cleaned according to local regulations.
j) Objects contaminated with asbestos fibres that cannot be cleaned must be moistened and eliminated
properly. After cleaning the work area must be adequately ventilated.
k) Extracted air must be guided and cleaned so that asbestos fibres are not released into the breathing air of
other employees.
l) The dust produced and collected must be transported in dustproof containers. Decanting is not permitted.
m) The extracted air which is released back into the outside air may not exceed a fibre content of 1000 F/m³.
n) The dust collector must be a type-approved industrial vacuum cleaner or dust collector with HEPA filter
and meet this criterion.
o) It must be ensured that the working area is supplied with sufficient outdoor air (fresh air).
p) For activities involving materials containing asbestos, a recirculation of purified air in the work area are
not allowed. The following activities with the industrial vacuum cleaner or dust collector recirculation of
purified air are permitted: 1: Activities involving low exposure according to TRGS 519, Number 2.8
confined spaces or small-scale work to TRGS 519, Section 2.10, and 2: cleaning.
q) the outside of the machine should be decontaminated by cleaning and vacuuming methods, de-dusted
before being taken out from the hazardous zone. All parts of the machine must be considered as
contaminated when they are removed from the hazardous zone and appropriate actions must be taken to
prevent dust from dispersing.
r) The machine is to be serviced and cleaned, as often as is required, but at least once a year, and if
necessary, repaired by a competent person (see qualification TRGS 519, Number 5.3, paragraph 2) and
checked by a maintenance company. The test result must be provided on request.
s) The machine and dust collector used in the black area may only operate in the white area after complete
cleaning, including the motor housing. For engines with bypass cooling the cooling air ducts have to be
clean.
t) When maintenance or repair procedures are carried out, all the contaminated elements that cannot be
properly cleaned, must be destroyed.
u) These elements must be disposed of in sealed bags according to the applicable regulations and in
accordance with the local laws governing the disposal of such material. This procedure must also be
followed when the filter has to be disposed.
3.8 Maintenance safety
a) Pull out the main plug and place it in sight, before starting inspections and repairing on the machine.
b) Wait for standstill of all drives before any inspections, adjustments and/or maintenance work is started.
c) Block machine in stable position before doing any maintenance work.
d) Failures due to inadequate or incorrect maintenance may generate very high repair costs and long
standstill periods of the machine. Regular maintenance therefore is imperative.
e) Operational safety and service life of the machine depends, among other things, on proper maintenance.
f) Prevent premature wear by keeping the machine as dust free as possible. Clean the machine for this
reason regularly with a dust collector and non-aggressive materials. Never use a high pressure water
cleaner to clean the machine.
g) Do not use any aggressive cleaning materials!
h) Use lint-free cleaning cloths!

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i) It is advisable to stock all spare parts or wear parts that cannot be supplied quickly. As a rule, production
standstill periods are more expensive than the cost for the corresponding spare part.
j) To allow the user to carry out maintenance operations, the machine must be disassembled, cleaned and
inspected as far as reasonably possible, without causing hazards for the maintenance staff or other
people.
k) The suitable precautions include decontamination before disassembling the machine, adequate filtered
ventilation of the exhaust air from the room in which it is disassembled, cleaning of the maintenance area
and suitable personal protection equipment.
3.9 Transport safety
a) Be aware of your surroundings and machine operating level. Do not side hill, do not run on steep incline,
this could cause machine to tip over.
b) The net weight of the BG-250RS is 230 kg. Use a crane or lift when transporting the machine, use the
lifting eye of the machine.
c) Before every use check the lifting eye and welds for:
deformation, damages, cracks, corrosion and wear.
d) Hold on to the steering handle until the machine is of the ground.
e) When lifting the machine from the ground, always use the lowest lifting speed. The cables must first be
tensioned at this speed; they must not be slack when the machine is lifted from the ground.
f) During hoisting make sure to be at a safe distance from the machine with the most optimal view on the
machine and working environment.
g) Never stand directly below the machine.
h) When transporting the machine do so in such a manner that damage due to the effects of the use of force
or incorrect loading and unloading is avoided.
i) The lifting eye can also be used to fasten the machine on a pallet or during transport.
j) Always drive backwards when driving up to a ramp or grade, and forwards when driving of the ramp.
m) Chock wheels for transport and always put the machine on the machine support which is made especially
for this reason.
n) Do not let the machine rest on the diamond disc or coupling when it is not in use, this will cause
deformation to the flexible coupling.
k) Don’t leave the machine unsecured on jobsites.
l) Park the machine always on a flat horizontal and levelled surface.
m) Make sure the electrical cable and dust hose are disconnected before transport.
n) Store the cleaned and dry machine in a humid free room. Protect the electrical motor from moisture, heat
dust and shocks.
o) Never use the machine for lifting persons or items.
p) Only lift the machine as shown in the picture below.

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3.10 Signs on the machine
The following stickers are placed on the machine. Meanings of these symbols are:
Type plate:
EU Declaration of Conformity:
Wear a dust mask class FFP2 or
higher.
Hearing protection is obliged.
Safety glasses with lateral protection
are obliged.
CE-mark on this machine.
Wear protecting gloves.
Safety shoes obliged.
Consult the manual before operating
the machine.
Name, address and CE mark.
The machine type.
The net weight of the machine in kilogram.
The year of manufacture.
The serial number of the machine.
Email address, Website, Telephone & fax number.
! Danger Hazardous voltage in motor
even when solid state controller is OFF.
Disconnect main power before servicing
motor, controller or associated wiring.
Lifting point.

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4. Initial operation
Before using the machine it is essential to inspect the machine.
It is not permitted to use the machine if the machine safety is not according the checkpoints below.
Before switching on the machine make sure that no-one can be endangered when the machine starts up!
4.1 Checkpoints power supply
Use only extension cables for extending the main cable that are sized and marked in accordance with
the overall power consumption of the machine.
Electrical cables must be fully unwind of them reels.
No damage is permitted for electrical cables.
Use an electrical power supply connection with earth connecting.
Make sure the power supply is in accordance with the machine specifications.
The main switch of the machine should be put to ‘Off’ before connecting to the power supply.
The circuit breaker of the power supply must have a ‘’D’’ characteristic. Circuit breakers with a “C” or
“B” characteristic can give problems when switching the machine on.
If the machine is to be operated using power from a generator, the generator must be operated in
accordance with the current legal regulations and directives in force. (this applies to the protective
earth conductor in particular) in order to ensure that all safety devices are functioning and to eliminate
possible damage to electrical components.
4.2 Checkpoints of machine
Safety functions and operating functions must work correct.
Check all screws and other fasteners for tightness. No loose bolts and/or nuts are permitted.
Check the electrical components, cables and connections for wear and/or damages.
Dust hose connections must be reliable: use hose clamps and industrial tape.
Dust hoses must be undamaged and free of obstructions.
Make sure that the dust bin / bigbag of the dust collector is empty and connected properly.
The flexible coupling is not deformed or damaged.
The diamond disc is not damaged.
4.3 Checkpoints of work area
Before grinding, clean the surface to be treated. There should not be any trash, stones, cloths, or oil
on the surface.
Remove all objects from the surface that can damage the machine. Remove reinforcing steel or other
objects protruding from the surface in order to prevent damage to the machine, the seals or diamond
disc.
When working with the Asbestos version, check and comply with the local regulations!
Make sure nobody is in the surrounding area of at least 5 meter from the machine.

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4.4 Manual moving of the machine
The machine can be moved around manually on 3 wheels.
Lay the machine backwards on the handle and flip the bracket with the castor front wheel down.
Make sure the 2 locking pins are locked into place (1 on the left and 1 on the right side of the bracket).
The traction wheels must be disconnected from the drive motors: pull out the locking pin of each rear
wheel. The machine can now be pushed around on its wheels.
WARNING! Always make sure all rotating parts have come to a complete standstill before moving the
machine around.
Be careful! Make sure nobodies feet can get under the wheels. Wear appropriate safety shoes when
you drive the machine to or from the work area.
Locking pin (2x)

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4.5 Changing the diamond disc
Read chapter 3 “Safety” before changing the disk.
Warning! Always wear Personal Protective Equipment!
The dust can be hazardous to the health! Wear a dustmask!
The disk can get hot! Don’t risk burning your hands! Wear protective gloves!
Make sure all moving parts of the machine have come to a complete standstill before changing the wings.
Removing the diamond disc
Read chapter 3 Safety.
Make sure the machine cannot start up. Push the emergency stop button
and unplug the power supply plug.
Lay down the machine so it is lying on the handle. Make sure the
machine will not fall back down. A second person can hold the handle
down, to make sure it will not fall back down.
Loosen the 4 bolts with an appropriate key.
Remove the diamond or multiflail disc.
Mounting the diamond disc
Read chapter 3 Safety.
Make sure the machine cannot start up. Push the emergency stop button
and unplug the power supply plug.
Lay down the machine so it is lying on the handle. Make sure the
machine will not fall back down. A second person can hold the handle
down, to make sure it will not fall back down.
Fix the diamond or multiflail disc underneath the adapter plate and turn
the 4 bolts with an appropriate key tight.
Pull out the mains plug before you start
Always wear gloves and a dust mask of at least class FFP3
Use an extra vacuum cleaner in order to work as dust free as possible

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5. Operating
During operating the machine, the following additional safety instructions must be followed closely.
Before switching on the machine make sure that no-one can be endangered when the machine starts up.
Make sure that no vehicles, such as forklift trucks and other equipment run over the electric cable and the dust
hose.
5.1 Working with the BG-250RS Remote System
Turn on the dust collector before switching on the machine.
Connect the dust hose between the dust collector and the machine.
1
FORWARD/REVERSE drive switch
8
SPEED FORWARD knob drive motors
2
RESET button
9
TRACKING knob drive motors
3
ON / OFF switch AUTO SWING program
10
AUTO DRIVE button drive motors
4
SPEED adjustment knob SWING program
11
EMERGENCY STOP button
5
START button grinding motor
12
Quick release pin
6
STOP button grinding motor
13
Battery warning light
7
Joystick drive motors
14
Secure the belt with the remote control around the middle of the body.
Make sure the wheel system is locked by turning both quick release pins into the wheels (12)
Make sure the EMERGENCY button (11) on the control unit is turned up.
Make sure nobody, including yourself, is in the surrounding area of at least 5 meter from the machine.
Push the RESET button (2) for 10 seconds.
To start grinding, push the START button (5) Check the turning direction of the motor.
(This action must be performed first, otherwise the remote control will not respond.)
Push the joystick (7) in the desirable direction to the drive the machine. The further the joystick (7) is
pushed into the desirable position, the faster the machine moves.
The SPEED FORWARD button (8) & the TRACKING button (9) don’t work in combination with the
joystick (7).
To drive the machine automatically, push the DRIVE button (10). Check the FORWARD/REVERSE
button (1) to check in which direction you drive. Make sure the ON/OFF switch (3) from the AUTO
SWING program is off. (lower position)
Changing the speed and the tracking of the machine could be done with the buttons SPEED (8) and
TRACKING (9)
If you want to work with the automatic SWING program, push the ON/OFF switch to ON (upper
position) the machine now starts to swing from left to right and vice versa.
To have a wider swing, turn the SPEED button (4) up. This will have as result that the machine will
have a longer time of swing.
The automatic drive (10) and the joystick won’t work together. So push the DRIVE button (10) again
before working with the joystick.

15
You can turn the machine around the axle by using the joystick, this can be done by pushing the
joystick totally to the right or totally to the left.
The machine can also turn around one wheel, this can be done by pushing the joystick to the left or
right upper corner.
5.2 Operating during grinding
To get an optimum result during grinding, the machine may not stand still. The machine must always be in
movement so it does not grind too deep into the floor. Move the machine from left to right and from
forward to backwards to get a nice flat result.
Preferably use the specially designed AUTO SWING program.
Carry out grinding in parallel tracks in such way that the
dust hose and electric cable do not become twisted.
Figure B shows the recommended grind paths leading away
from the dust collector.
The advancing speed depends on the material of the surface to be treated and the desired profiling.
Regularly check the contents of the dust collector. Always wear a dust mask of at least class FFP3 when
emptying the dust bin or changing the dustbag /bigbag. Observe and obey the local waste disposal
regulations!
Make sure that no vehicles, such as forklift trucks and other equipment run over the electric cable and the
dust hose.
Contact our experts at Blastrac for the correct application of the different tools
and their corresponding working speeds.
In case of emergency or operating trouble, like vibrations or strong noises, switch the machine
off immediately!
5.3 Switching off the BG-250RS
To stop grinding, push the STOP button (6)
After pushing the EMERGENCY button (11), reset the control unit by pushing the RESET button (2) for
10 seconds and switch the LEFT/RIGHT switch (3) up and down.
Always stop driving first before stop grinding!
Shut down the dust collector.
1
Dust collector
2
Dust hose and
electric cable
3
Grinding machine
Figure B

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6. Maintenance
Pay attention to Chapter 3 "Safety" during maintenance and repair works.
Failures due to inadequate or incorrect maintenance may generate very high repair costs and long standstill
periods of the machine. Regular maintenance therefore is imperative.
Operational safety and service life of the machine depends, among other things, on proper maintenance.
The following table shows recommendations about time, inspection and maintenance for the normal use of the
machine.
Operating hours/
time period
Inspection points, maintenance instructions
12 h after repairing
Check all accessible screw connections for tight seat.
Every 3 hour
Check the contents of the dust collector.
Daily and prior to
starting work
Check that all safety devices working adequate.
Check the electric connections for sediments of dirt or foreign bodies.
Check the electric motors for dirt and other contaminants.
Check the function of the residual current operated device.
Check the hose connections for tightness and fixed seat.
Check all hoses on the machine for damages or leakage.
Make sure that the dust bin is emptied
Check the diamond disk and flexible coupling for damages and wear.
Check whether or not, there are any foreign matter in the coupling of
the grinding disc.
Check the batteries and fixing points inside the remote controller for
dirt. Do not use aggressive cleaning agents.
Make sure the inside of the electrobox is dust-free.
Every 3 months
Clean the machine with a dust collector and a damp lint-free cloth.
Annually
Full overhaul and cleaning of the complete machine.
The time indications are based on uninterrupted operation. When the indicated number of working hours is not
achieved during the corresponding period, the period can be extended. However a full overhaul must be
carried out at least once a year.
Due to different working conditions it can’t be foreseen how frequently inspections for wear check’s,
inspection, maintenance and repair works ought to be carried out. Prepare a suitable inspection schedule
considering your own working conditions and experience.
Pay attention to unusual noises or strong vibrations. Check for the cause of every big change. Call a technician
if you have doubts about the cause or when a repair without a technician seems not possible without damages.
Only use genuine Blastrac spare parts.
Generally the grinding machine requires very little special attention regarding its maintenance.
After using the machine, clean the machine with the dust collector, so there is no dust on or in the machine.
See to it that any wastes or fibre residues do not remain in the area of the grinding disc.
Our specialists will be happy to assist you with more advice.
Prior to any repair works on the machine and its drives, secure the machine against
unintentional switching on. Put the machine to its safety off position. The machine is in a safe
condition when it cannot generate any hazard.

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Follow additional operating and maintenance instructions of Original Equipment
Manufacturers if included during your service and maintenance work.
CONSULT THE OPERATING INSTRUCTIONS OF REMOTE CONTROL UNIT FOR
ADDITIONAL MAINTENANCE INSTRUCTIONS!
Further is advised:
Store the cleaned and dry machine in a dry and humid free room. Protect the electrical motors from moisture,
heat, dust and shocks.
All repair work must to be done by qualified Blastrac personnel, this to guarantee a safe and reliable machine.
Any guarantee on the machine is expired when:
Non original Blastrac parts have been used
Repair work is not done by qualified Blastrac personnel
Changes, add on’s or conversions are undertaken without written permission of Blastrac BV
Screws, bolts etc. that have been removed must be replaced with those of the same quality, strength, material
and design.
Do not weld, flame cut or perform grinding works on or near the machine. Danger of fire or explosion exists!
Provide adequate ventilation when working in a confided space.
Secure the maintenance area if necessary.
Work only with original Blastrac parts.
Check regularly to see if the diamond disc is in good condition. Replace the diamond disc immediately when it
is damaged or worn out.
Check if the flexible coupling is stiff enough after every day working. Replace if any deformation or damage is
found.
Unusual vibrations on the machine can be caused by worn out diamond discs and/or flexible coupling.

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6.1 Replacing the flexible coupling:
Push the emergency stop button
Pull out the main plug
Remove the diamond disc
Remove the dustcap
Loosen the bolts of the adapter plate and the flexible
coupling
Take a new flexible coupling (part number: 000118-3)
and 12x new bushes (part number: 000118-3/BUSH)
assemble this together with the adapter plate on the
fixed coupling on the motor axle.
Mount the dustcap back.
Prevent premature wear by keeping the machine as dust free as
possible. Clean the machine for this reason regularly with a
dust collector.
Clean the machine every day with air and non-aggressive
materials. Never use a high pressure water cleaner to clean the
machine.
Remove the diamond disc after using the machine.
6.2 Other maintenance
Dust in the electrical box can damage the electronics; due to this the electrical box has to be cleaned
every day from inside and outside. Clean the fans and filters from the electrobox with a vacuum
cleaner. If you use compressed air, make sure to blow from inside the electrobox to outside. Wear a
dustmask during these activities.
Check the seals for wear, and replace them at the time when they no longer provide a good seal
against dust emissions from the machine, by this action damage to the surrounding workspace is
avoided, and consequently saves additional charges from the job client.

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6.3 Remote control maintenance
Always refer to the Safety, Service & Maintenance instructions from the
Manufacturer for all information.
Periodical Maintenance
To maintain availability and operational safety, a regular maintenance is necessary on the system.
Daily maintenance
Before each use of the transmitter, check the following items for faults or damages:
􀂇Visual inspection of rubber sealing around levers
􀂇Broken/faulty switches or controls
􀂇Visual inspection of transmitter housing (cracks, dents)
􀂇Visual inspection of carrying device
􀂇Test of battery lock is working normally
􀂇Test of manual stop button (it shall be intact and easy to move)
Check function of:
􀂇Check function of transmitter LED signals, short flash at power up.
􀂇Check function of transmitter “Tilt function”, by tilting the transmitter 90 degrees out of
normal carry position.
If there is any damage or fault contact an authorised service technician.
After every workday, use air to blow the dust off the transmitter.
Weekly maintenance
􀂇Clean the battery contacts and the contacts on the transmitter and charger. Do not use any aggressive
cleaning materials!
􀂇Clean the transmitters control panel and check that the print is still readable. Do not use any aggressive
cleaning materials!
Yearly maintenance
To maintain availability and operational safety, a yearly maintenance is necessary on the system. Only
personnel trained and qualified by Akerströms may perform the scheduled maintenance.
The maintenance is divided into a yearly check and an every 4th year check.
-Visual inspection of assembly Yearly
-Replacement of seal boots for switches Yearly
-Replacement of detent springs in joystick Every 4th year
-Replacement of bellow for joystick Yearly
-Replacement of stop switch Yearly or after 7600 cycles,
Do not attempt to continue working with a defect remote control. Even initially minor defects
might be the start of a more extensive and expensive defect.

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7. Troubleshooting
Fault
Possible cause
Remedy
Excessive vibration
And / or unusual noises
Imbalance due to worn or broken grinding
tools.
Worn out flexible coupling
Debris or dirt deposit between the grinding
disc and the coupling.
Defective bearing.
Replace all worn or broken parts.
Replace the flexible coupling
Clean the coupling and grinding disc.
Check the bearing on the axle drive shaft
and replace if necessary.
Reduced or no grinding
performance
Grinding tools have reached the maximum
permissible wear.
Inappropriate grinding tool for the
application.
Replace the worn parts.
Replace the grinding tools with
appropriate grinding tools for the surface
to be treated.
Motor does not switch on
Missing phase / Wrong power supply
Defective Component.
The belt with the remote control is not
secured around the middle of the body.
Check the mains power supply and next
switch on again.
Find fault and replace defective
component.
Make sure the remote control is in a
horizontal position, tilting the remote
control too much will activate the safety
feature. (Which shuts down the machine
if the operator falls down.)
Motor triggers while
running
Motor protection switch triggered because of
overload.
Motor has a defect.
Reduce additional load .
Check the motor.