National Flooring Equipment 3396 User manual

Read Manual Before Operating Machine
402561 Rev D
3396 SHOT BLASTER
OPERATING MANUAL

Table of Contents
3
Table of Contents .......................................................................................................................................................... 3
Features and Specications......................................................................................................................................... 4
Safety.............................................................................................................................................................................. 5
Components and Assembly ......................................................................................................................................... 7
Amp Meter ............................................................................................................................................................. 7
Phase Reverse ...................................................................................................................................................... 7
Comb Lever - Traction Drive.................................................................................................................................. 7
Comb Lever - Abrasive Control Valve.................................................................................................................... 7
The Wheel Kit ........................................................................................................................................................ 7
The Separator........................................................................................................................................................ 8
The Traction Drive ................................................................................................................................................. 8
The Base Seals ..................................................................................................................................................... 8
Abrasive Media ...................................................................................................................................................... 8
Edge Plate ............................................................................................................................................................. 8
Belt Drive ............................................................................................................................................................... 9
Safety Off Position ................................................................................................................................................. 9
Transport................................................................................................................................................................ 9
Preparing for Operation ....................................................................................................................................... 10
Operation.......................................................................................................................................................................11
Start-Up Procedure...............................................................................................................................................11
Turning Off the Machine .......................................................................................................................................11
Recommended Blast Paths ..................................................................................................................................11
The Blast Pattern ................................................................................................................................................. 12
Pattern and Control Cage Adjustments ............................................................................................................... 12
Adjusting Magnets and Seals .............................................................................................................................. 13
Storage ................................................................................................................................................................ 13
Maintenance Schedule ........................................................................................................................................ 13
Troubleshooting Guide ............................................................................................................................................... 14
Warranty ....................................................................................................................................................................... 15

Features and Specications
4
FEATURES
Product Specications
Width Max.
Length
Max.
Height Weight Working Width Voltage Blasting Capacity Speed
12.5”
(32 cm)
49”
(124 cm)
40.5”
(103 cm)
288 lb
(130.6 kg) 8” (20 cm) 220 Up to 861 ft2/h
(80 m2/hr)
0-98 ft/min
(0-30 m/min)
Valve and Blast Wheel Control - Located on the machine steering
drive handle for reduced fatigue.
Adjustable Handle - Ergonomic placement greatly reduces operator
fatigue.
8” Blast Pattern - Accomodates blasting 1/2” to the wall and 861 ft2/
hour.
Rear-Facing Vacuum Port - Incorporated into the rebound hopper to
improve air ow.
Air Wash System - Features a superior in-line air wash separation
system that maximizes the separation of dust from the reclaimed
abrasive resulting in prolonged part life.
Front Swivel Casters - Increase maneuverability and control.
Valve and Blast Wheel
Control
Adjustable Handle
Rear-Facing Vacuum Port
Front Swivel Casters
In-Line Air Wash
Separation Systems
8” Blast Pattern

Safety
Environment
Avoid use in dangerous environments.
Do not use in rain, damp or wet locations, or in the presence of
explosive atmospheres (gaseous fumes, dust, or ammable mate-
rials). Remove materials or debris that may be ignited by sparks.
Keep work area tidy and well-lit - a cluttered or dark work area may
lead to accidents.
Protect others in the work area and be aware of surroundings.
Provide barriers or shields as needed to protect others from debris
and machine operation. Children and other bystanders should be
kept at a safe distance from the work area to avoid distracting the
operator and/or coming into contact with the machine. Operator
should be aware of who is around them and their proximity. Sup-
port personnel should never stand next to, in front of, or behind
the machine while the machine is running. Operator should look
behind them before backing up.
Guard against electric shock.
Ensure that machine is connected to a properly grounded outlet.
Prevent bodily contact with grounded surfaces, e.g. pipes, radia-
tors, ranges, and refrigerators. When scoring or making cuts,
always check the work area for hidden wires or pipes.
5
GENERAL RULES FOR SAFE OPERATION
Before use, anyone operating or performing maintenance on this equipment must read and understand this manual, as well as any labels pack-
aged with or attached to the machine and its components. Read the manual carefully to learn equipment applications and limitations, as well
as potential hazards associated with this type of equipment. Keep manual near machine at all times. If your manual is lost or damaged, contact
National Flooring Equipment (NFE) for a replacement.
Personal
Dress properly and use safety gear.
Do not wear loose clothing; it may be caught in moving parts.
Anyone in the work area must wear safety goggles or glasses,
hearing protection during extended use, and a dust mask for dusty
operations. Hard hats, face shields, safety shoes, etc. should be
worn when specied or necessary.
Maintain control; stay alert.
Keep proper footing and balance, and maintain a rm grip.
Observe surroundings at all times and use common sense. Do not
use when tired, distracted, or under the inuence of drugs, alcohol,
or any medication that may cause decreased control.
Keep hands away from all moving parts and tooling.
Wear gloves when changing tooling. Remove tooling when ma-
chine is not in use and/or lower cutting head to the oor.
Do not force equipment.
Equipment will perform best at the rate for which it was designed.
Excessive force only causes operator fatigue, increased wear, and
reduced control.
Equipment
Use proper parts and accessories.
Only use NFE-approved or recommended parts and accessories.
Using any that are not recommended may be hazardous.
Ensure accessories are properly installed and maintained.
Do not permanently remove a guard or other safety device when
installing an accessory or attachment.
Inspect for damaged parts.
Check for misalignment, binding of moving parts, loose fasteners,
improper mounting, broken parts, and any other conditions that
may affect operation. If abnormal noise or vibration occurs, turn
the machine off immediately. Do not use damaged equipment until
repaired. Do not use if power switch does not turn machine on and
off. For all repairs, insist on only identical NFE replacement parts.
Maintain equipment and labels.
Keep handles dry, clean, and free from oil and grease. Keep cut-
ting edges sharp and clean. Follow instructions for lubricating and
changing accessories. Motor and switches should be completely
enclosed at all times with no exposed wiring. Inspect cord regu-
larly. Labels carry important information; if unreadable or missing,
contact NFE for a free replacement.
Avoid accidental starting; store idle equipment.
When not in use, ensure that the machine is unplugged; do not
turn on before plugging in. Store in a dry, secured place. Remove
tooling when storing, and keep away from children.
Maintenance & Repairs
Begin maintenance work only when the machine is shut
down, unplugged, and cooled down.
Use proper cleaning agents.
Ensure that all cleaning rags are ber-free; do not use any aggres-
sive cleaning products.
Schedule regular maintenance check-ups.
Ensure machine is properly cleaned and serviced. Remove all
traces of oil, combustible fuel, or cleaning uids from the machine
and its connections and ttings. Retighten all loose ttings found
during maintenance and repair work. Loose or damaged parts
should be replaced immediately; use only NFE parts.
Do not weld or ame-cut on the machine during repairs, or
make changes to machine without authorization from NFE.
CAUTION! ENSURE PROPER USE OF EXTENSION CORDS. IF AMP DRAW IS HIGHER THAN SHOWN ON
TABLE OR CORD IS LONGER THAN 50 FT, SEE AN ELECTRICIAN.
ASSUMPTIONS: 3% ALLOWABLE VOLTAGE DROP, COPPER CONDUCTORS RATED FOR 75OC, 1.25
SAFETY FACTOR, CORD VOLTAGE RATING OF 600VAC, PROPER CORD TYPES (STO, STOW, SOOW).
Amp Draw Gauge
0-12 14
13-16 12
14-24 10
25-40 8
5

WARNING: GRINDING/CUTTING/DRILLING OF MASONRY, CONCRETE, METAL AND OTHER MATERIALS CAN GENERATE DUST,
MISTS AND FUMES CONTAINING CHEMICALS KNOWN TO CAUSE SERIOUS FATAL INJURY OR ILLNESS, SUCH AS RESPIRATORY
DISEASE, CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. IF YOU ARE UNFAMILIAR WITH THE RISKS ASSOCIATED
WITH THE PARTICULAR MATERIAL BEING CUT, REVIEW THE MATERIAL SAFETY DATA SHEET AND/OR CONSULT YOU EMPLOYER,
THE MATERIAL MANUFACTURER/SUPPLIER, GOVERNMENTAL AGENCIES SUCH AS OSHA AND NIOSH AND OTHER
AUTHORITIES ON HAZARDOUS MATERIALS. CALIFORNIA AND SOME OTHER AUTHORITIES, FOR INSTANCE, HAVE
PUBLISHED LISTS OF SUBSTANCES KNOWN TO CAUSE CANCER, REPRODUCTIVE TOXICITY, OR OTHER HARMFUL
EFFECTS. CONTROL DUST, MIST AND FUMES AT THE SOURCE WHERE POSSIBLE. IN THIS REGARD USE GOOD
WORK PRACTICES AND FOLLOW THE RECOMMENDATIONS OF THE MANUFACTURER/SUPPLIER, OSHA/NIOSH,
AND OCCUPATIONAL AND TRADE ASSOCIATIONS. WHEN THE HAZARDS FROM INHALATION OF DUST, MISTS AND
FUMES CANNOT BE ELIMINATED, THE OPERATOR AND ANY BYSTANDERS SHOULD ALWAYS WEAR A RESPIRATOR
APPROVED BY OSHA/MSHA FOR THE MATERIAL BEING CUT.
Safety
SHOT BLASTER SAFETY GUIDELINES
Before use, anyone operating this equipment must read and understand these safety instructions.
6
WARNING: GRINDING/CUTTING/DRILLING OF MASONRY, CONCRETE, METAL AND OTHER MATERIALS CAN GENERATE DUST,
MISTS AND FUMES CONTAINING CHEMICALS KNOWN TO CAUSE SERIOUS FATAL INJURY OR ILLNESS, SUCH AS RESPIRATORY
DISEASE, CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. IF YOU ARE UNFAMILIAR WITH THE RISKS ASSOCIATED
WITH THE PARTICULAR MATERIAL BEING CUT, REVIEW THE MATERIAL SAFETY DATA SHEET AND/OR CONSULT YOU EMPLOYER,
THE MATERIAL MANUFACTURER/SUPPLIER, GOVERNMENTAL AGENCIES SUCH AS OSHA AND NIOSH AND OTHER
AUTHORITIES ON HAZARDOUS MATERIALS. CALIFORNIA AND SOME OTHER AUTHORITIES, FOR INSTANCE, HAVE
PUBLISHED LISTS OF SUBSTANCES KNOWN TO CAUSE CANCER, REPRODUCTIVE TOXICITY, OR OTHER HARMFUL
EFFECTS. CONTROL DUST, MIST AND FUMES AT THE SOURCE WHERE POSSIBLE. IN THIS REGARD USE GOOD
WORK PRACTICES AND FOLLOW THE RECOMMENDATIONS OF THE MANUFACTURER/SUPPLIER, OSHA/NIOSH,
AND OCCUPATIONAL AND TRADE ASSOCIATIONS. WHEN THE HAZARDS FROM INHALATION OF DUST, MISTS AND
FUMES CANNOT BE ELIMINATED, THE OPERATOR AND ANY BYSTANDERS SHOULD ALWAYS WEAR A RESPIRATOR
APPROVED BY OSHA/MSHA FOR THE MATERIAL BEING CUT.
Shot Blasting
Beware of hidden obtrusions.
Watch out for hidden dangers and protrusions in ooring. Do not
use on largely uneven surfaces.
Avoid contact with hot shroud.
Do not touch the shroud without proper hand protection. Both
become hot during operation and remain hot after stopping the
machine.
Provide barriers, shields, or safety glasses as needed to
protect others from debris.
Use for correct applications.
Do not force equipment to do heavier duty work than it was made
for.
Use a magnetic sweep immediately after blasting.
Steel shot that is left on the walking surfaces creates a hazard for
falling unexpectedly.
Dust Collection
Turn off machine before working with dust collector.
Do not switch off or remove the dust collector while the machine is
running.
Use with appropriate dust collecting system.
Do not operate machine designed for use with a dust collector
without the dust collector. Ensure dust collector is on and operating
properly while grinding.
Dispose of collected waste.
Do not leave the dust collector bag full of waste. Handle and
dispose of bag and waste in accordance with all applicable local,
state, and federal regulations. The dust bin of a connected dust
collector must be emptied before transportation.
Equipment
6

Components and Assembly
FIG. 2
AMP METER
The Amp meter (Figure 1) shows the load consumption of the blast wheel motor. When
turning on the motor, the current is high (starting current peak). For no-load current and
operating current, see the following values:
No Load Operating
< 10 Amps 23 Amps
PHASE REVERSE
The phase reverse, which is integrated in the main plug, adjusts the direction of rotation
of the wheel motor. Before using machine at each job site, verify the rotation direction of
the blast wheel motor. Reverse rotation will result in premature wear and poor perfor-
mance. Motor rotation can be observed through openings in the fan cover. Motor must
rotate in the direction indicated by the arrow on the fan cover.
If motor is found to be running backwards:
1. Turn off control power; wait for motor to stop.
2. Turn FWD/REV switch to the opposite position.
3. Turn on control power and blast wheel. Verify motor now rotates correctly.
COMB LEVER - TRACTION DRIVE (FIGURE 2)
This lever (1) is located above the panel and turns on a microswitch (2) that will start or
stop the tracton drive. If this lever is lifted slightly upwards, the traction drive motor will
start up and the machine will move forward, towards direction V. The speed depends
on the setting of the potentiometer (3). Lowering the lever (1) to area S will cause the
traction drive to stop. Lifting the lever further upwards into area O will open the abrasive
control valve (7) via the installed control cable (4).
COMB LEVER - ABRASIVE CONTROL VALVE (FIGURE 3)
To regulate the ow of abrasive to the blast wheel there is a magnetic valve (7) tted
between the storage hopper (5) and feed spout (6). This valve has a shutter (7A) that
is controlled by the comb lever (1). Changing the shutter position results in a different
amount of abrasive owing to the blast wheel. Feeding more abrasive causes more work
and a higher load on the blast wheel motor.
The load on the motor is indicated by the Amp meter. The max load is 23-25 Amp. Do not
load more abrasive than recommended. Higher load will cause damage to the motor or
cause it to prematurely fail.
THE WHEEL KIT (FIGURE 4)
The blast wheel (1) throws the abrasive to the surface to prole. It is located in a wheel
housing (G), protected by replaceable wear plates (S). The blast wheel is driven by an
electric motor via a belt drive and is mounted on a bearing unit. The correct rotation of
this machine’s blast wheel is counterclockwise (L).
At the center of the blast wheel is a pre-accelerator called an impeller (2), which feeds
dosed quantities of abrasive onto the blades of the blast wheel. The abrasive has to pass
through the opening (O) of the control cage (3).
This control cage (3) is held by two clamps (4) and needs to be adjusted so the ow of
FIG. 3
FIG. 4
FIG. 1
7

Components and Assembly
8
the abrasive is facing the center of the machine. Two small grooves (K) indicate the loca-
tion of the control cage opening. Turning the control cage counterclockwise will move the
blast pattern to the right, and turning it clockwise will move the blast pattern to the left.
THE SEPARATOR (FIGURE 5)
The separator (1) is mounted to the end of the rebound plenum. The deector (5) and
bafe plate (4) will stop the reected abrasive. The lter connected to the hose connec-
tor (8) will generate an appropriate air ow within the separator so that dust is separated
from abrasive. The abrasive drops back to the storage where it must pass through a wire
mesh tray (6) .This tray is tted to prevent any coarse contaminants from getting into the
blast wheel. The tray can be removed from the side for cleaning purposes. Out of this
storage section the abrasive runs via a magnetic control valve and feed spout (2) into the
blast wheel.The valve itself is controlled by the control cable (7).
THE TRACTION DRIVE (FIGURE 6)
This machine has a 0.25 kW gear motor. The power transmission works by a chain drive.
The wheel (1) and sprockets (5 and 6) of the chain-drive are rmly connected by the
chain. The lower sprocket (6) drives the drive shaft and the driving wheel (2) in working
direction V. The driving wheel (2) transfers the force of the gear motor only in working
direction V, therefore the machine can be pushed forward manually faster than the driv-
ing speed chosen with the potentiometer.
THE BASE SEALS (FIGURE 7)
On the front and side of the machine are magnetic seals (1) surrounded by brush seals
(2). On the rear is a drag seal (3) which slides over the surface and hinders abrasive from
getting out of the blast area.
The correct setting of the magnetic seals is 5/16”-1/2” (8-12 mm) over the oor, depend-
ing on the application. The adjustment is done by screws on the traction drive and the
rear (4).
ABRASIVE MEDIA
Selection of abrasive is very important. The use of incorrect abrasive increases wear on
the machine. Contact NFE customer service regarding the best abrasive to use.
To put abrasive into the machine, complete the following:
1. Remove lid from separator.
2. Ensure tray is in place.
3. Fill abrasive, distributed equally, up to the bottom of the mesh on the tray.
4. Check occasional function of the deector shutter.
FIG. 5
FIG. 6
FIG. 7

Components and Assembly
FIG. 9
BELT DRIVE
The V-belt is designed for the installed drive power. Forcing the drive to grant a higher
output by over tensioning the V-belt results in belt breaks, bearing damage and thus
to lower efciency. A low V-belt tension results in slippage causing an increased belt
temperature and thus to premature destruction of the V-belts. Temperatures exceed-
ing 158°F for a long period reduce the service life and performance of the V-belts. The
grooves of the V-belt pulleys have to be free from rust, grease, dirt and damages. The
use of belt wax or similar substances to increase the friction coefcient is unnecessary
and damages the V-belts. Avoid any contaminations by oil, grease or chemicals.
In order to grant a perfect output transmission, the V-belt drive needs continuous obser-
vation.
Belt Tension (Figure 8)
To achieve a max. power transfer and live time, the correct setting of the belt tension is
essential. Often belts are set with the wrong tension and fail before normal service time;
belts that are set with too much tension cause bearing problems on motors or bearing
units.
Check the correct pre-tension in accordance with Figure 9 by pressing down the belt.
The distance the belt can be pressed down should be 5/16”-1/2” (8-12 mm). To adjust the
correct belt tension, slacken the motor xing screws (H) and the locknut (K). Adjust the
belt tension by the adjuster screws (S) and tighten afterwards the locknut (K). Draw up
the motor screws (H) and t the belt guard again.
SAFETY OFF POSITION
The safety off position must be used when performing maintenance or repairs, or when
the machine must be secured against acceidental start-up.
1. Turn off the blast machine and dust collector.
2. Wait all drives to come to a standstill.
3. Disconnect the main plugs.
4. Secure the machine against accidental start-up.
TRANSPORT
In order to transport the machine from a vehicle to the working area, the machine will
need to be lifted up. In order to do so, use the handle lever (Figure 9):
1. Push the handle downwards so the front of the machine lifts up from the ground.
2. Push the machine forward in direction as shown using the handles.
During transport:
• Never pull the machine backwards; this could damage the rear seals.
• When transporting the machine with hoisting equipment, such as a crane or a lift,
check the total weight permitted. The weight of the equipment can be found in Fea-
tures and Specications or on the serial plate on the machine. Use only appropriate
and qualied hoisting equipment, ropes, and chains.
9
WARNING: REMOVE ALL ABRASIVES FROM THE MACHINE PRIOR TO
TRANSPORT.
FIG. 8

Components and Assembly
10
• Do not x any rope or chain to the handle. Only x ropes or chains at locations as
shown (Figure 10). The handle is only xed with two screws and cannot be used for
transport or to x ropes or hoisting equipment.
• When transporting the machine with vehicles, proceed in such a manner that dam-
age is avoided. Use at least two straps to secure the machine to the cabin of the
vehicle. Ensure that all parts of the machine are xed (Figure 11).
• To reduce the height of the machine you can slide the handle down. To do so,
slacken the two xing screws and slide the handle down. Do not forget to x the
xing screws again.
PREPARING FOR OPERATION
In order to avoid downtimes, a regular inspection is essential. Before start-up, complete
the following:
• Ensure all protective housings and hose connections are tted, and that the dust
collector is connected correctly.
• Check that all machine parts are assembled safely and correctly.
• Check that all screws and other fasteners are tight.
• Remove any foreign bodies from the abrasive storage, feed spout, blast wheel
parts, electrical connections, motors, etc.
• Check parts for damage and wear; replace if necessary.
• Empty dust collector container.
• Check the level of abrasive in the storage area; ll if necessary.
• Check that the height adjustment is approx. 5/16”-1/2” (8-12 mm) between magnet
and surface.
• Surface must be swept for loose parts prior to operation. Ensure that machine can
travel over all inequalities on the surface; small inequalities like weld seams or oor
joints are not an issue.
• Run magnetic sweep over area to remove any loose metallic materials.
• Use hand magnet to “seed” magnetic seals by placing media on the surface in front
of the machine. Push machine over media until gone.
Note: Whenever the machine is not used for blast cleaning, the abrasive valve must be
closed.
FIG. 11
FIG. 10

FIG. 12
WARNING: WHEN BLASTING CONCRETE, THE ABRASIVE FEED VALVE MUST
ONLY BE OPENED WHEN THE MACHINE IS IN FORWARD MOTION. IF THE
MACHINE IS AT A STANDSTILL AND THE VALVE IS OPENED, DEEP GROOVES
WILL BE BLASTED INTO THE CONCRETE SURFACE WITHIN SECONDS.
WARNING: WHEN THE BLAST HEAD IS LIFTED FROM THE FLOOR, ABRASIVE
WILL SPURT OUT OF THE SIDES OF THE BLAST HEAD AT HIGH SPEED. IF THE
MACHINE IS MOVEDTHE BLAST HEAD RAISED, THE ABRASIVE FEED VALVE
MUST BE FULLY CLOSED.
Operation
START-UP PROCEDURE (FIGURE 12)
1. Turn on dust collector (see dust collector manual).
2. Check that the magnetic valve is closed. Push the green “Control Power” button.
3. Set the potentiometer in a low speed setting (2-3). Push the green “Blast Wheel”
button.
4. Pull the comb lever up about 1/4” (6 mm). The machine will start moving forward.
5. After the machine starts to move forward, pull the comb lever further upwards in
order to open the abrasive control valve and begin blasting the surface.
6. Watch the Amp meter to control the load of the wheel motor. During start-up, the
motor will need its starting current until max. speed of the motor is reached. Ensure
it does not exceed the max. load.
TURNING OFF THE MACHINE (FIGURE 13)
1. Close the abrasive feed valve by lowering the comb lever while the machine is still
moving forwards.
2. Release the comb lever so that it swings back into its previous position. The trac-
tion drive will switch off and the machine will stop.
3. Press the red “Control Power” button.
4. Turn off the dust collector (see dust collector manual).
RECOMMENDED BLAST PATHS
Carry out blast operation in parallel tracks in a manner that prevents the dust hose and
electric cable from becoming twisted. Figure 13 shows the recommended blast path lead-
ing away from the lter.
1. Position the lter unit near a power source.
2. Place the machine near the lter unit and spread out the hose (Figure 13).
3. Connect the machine and lter with the dust hose.
4. Check the setting of the outlet damper on the lter.
5. Work the machine with the hose spread out in the opposite direction, repeating
the process away from the lter unit. Watch the maximum length of cable and dust
hose during operation.
11
CAUTION: THE DUSTBIN OF THE DUST COLLECTOR NEEDS TO BE EMPTIED
REGULARLY. DO NOT OVERFILL THE BIN TO AVOID DUST EXPOSURE WHEN
OPENING. COMPLY WITH THE LOCAL WASTE TREATMENT REGULATIONS
REGARDING THE REMOVED MATERIAL.
FIG. 13

Operation
6. Turn the machine around by rst closing the feed valve. Then turn the machine to
the right and guide it in an arc to get back to the last blasted path. Repeat this in
order to complete the surface. Move away from the lter towards the open surface.
7. Move the dust collector to the surface already blasted and nished the area where
the lter was located before.
THE BLAST PATTERN
Abrasive scatter is restricted to an angle of about 55°. The position of the window in the
control cage determines the direction and hot zone of the blast pattern.
Correct adjustment of the control cage and thus of the blast pattern is the most important
factor for optimum working with this machine. Incorrect adjustment of the control cage will
result in very high wear and premature blasting through of the liners in the blast wheel
housing, as well as reduced blasting performance and a possible loss of the rebound
energy of the abrasive.
After each blast wheel repair work, switch on the blast wheel motor for a short period
(without feeding abrasive) in order to nd out whether the rotating parts turn freely and
without vibration. After that, the blast cleaning procedures can be continued.
PATTERN AND CONTROL CAGE ADJUSTMENTS
In order to get a uniform blast pattern on the surfaces to be treated, the correct adjust-
ment of the blast pattern is most important. Incorrect adjustment of the blast pattern
results in:
• Uneven cleaning (shadows on the right or left hand side).
• Extreme wear on wheel kit and liners.
Factors That Affect the Blast Pattern
• The rotation direction of blast wheel must correspond to the arrow indicating the
turning direction on the housing.
• With increased wear of the wheel kit, the blast pattern will change.
• Every change of abrasive requires the blast pattern to be set or to be re-adjusted.
• The position of the lateral window in the control cage determines where the abra-
sive is fed on the blast wheel blades. After changing the wheel kit, the control cage
must be checked and re-adjusted.
Adjusting the Control Cage (Figure 14)
The adjustment is done by slackening the cage clamps (H), and turning the control cage
(Z) into a pre-setting position. The cast grooves or notches on the control cage show the
position of the control cage opening. The feed spout remains in its former position; the
control cage opening is approximately opposite to the throwing angle.
The adjustment can be carried out with the following steps (Figure 15):
1. Determine the upper (OK) and lower (UK) window edges of the control cage.
2. Set the upper window edge of the control cage to the angle that would be 11:00
on a dial.
3. Place the cage clamps (3) and x them with nuts (2).
4. Place the feed spout (4) onto the control cage.
Test blast for 45 seconds at full amperage without moving the machine on a 3/16-5/16”
(5-8 mm) steel plate. Move the machine from the blast zone when nished and inspect
12
FIG. 14
FIG. 15
FIG. 16
FIG. 17

Operation
13
the steel plate. There will be a hot zone on the blasted surface where the machine has developed the highest blast intensity. The zone is nor-
mally a little lighter and warmer than the rest of the blast cleaned area. Adjust the control cage until the hot zone is exactly in the middle of the
blast pattern.
• If the blast result shows strong blasting on the operator’s right side and weak blasting on the left side (shadows), turn the upper edge of
the control cage clockwise 3/32-5/32” (2-4 mm).
• If the blast result shows strong blasting on the operator’s left side, and weak blasting on the right side, turn the upper edge of the control
cage counterclockwise 3/32-5/32” (2-4 mm).
Make adjustments until the hot zone is in the middle of the blast pattern (Figure 16). Only make adjustments while the machine is turned off.
ADJUSTING MAGNETS AND SEALS (FIGURE 17)
The adjusted height of the magnetic seals, parallel to the surface to be treated, should be set equal at about 8 mm. For the height adjustment, a
1/4-5/16” (6-8 mm) stainless steel strip (C) is shifted below the magnetic sealing.
Adjust the height with the setting screws until the correct distance of 5/16-1/2” (8-12 mm)has been set. There are four screws, one at each of
the rear wheels (S1) and two on the inner side of the front wheel bracket (S2).
The height of the brush seals should be a max. of 1/8” (3 mm) above the surface. The adjustment is possible within the slots of the seal ele-
ments. The setting depends on the structure of the surface; in general, the rougher the surface, the lower the setting.
STORAGE
After each use, remove abrasive from hopper. Pull out the wire mesh tray and discard all materials.
If storing for longer than three months, complete the following:
• Turn off the machine.
• Remove all abrasive from the machine.
• Remove all abrasive from magnets.
• Clean and cover the machine.
• Motors, cables, and plugs need to be protected against moisture, dust, and shock.
MAINTENANCE SCHEDULE
Operating Hours Inspection and Maintenance
12 hours after repairs • Check function of all safety devices.
• Check tightness on all accessible screw connections.
Every 3 hours • Check whether there is any foreign matter in the hopper, the feed spout, or in the blast wheel unit.
Daily, prior to operation • Check the hose connections for tightness.
• Check the hose to the lter for damages.
• Make sure that the dust collector has been emptied.
• Check blast wheel, feed spout, liners, and fasteners for wear or damage.
• Check the separator parts for wear and defects.
• Check the level of abrasive in the storage hopper. Fill to bottom of wire mesh if necessary.
• Check the magnetic and seals for wear; replace if necessary.
• Check the electrical connections, motor, and separator for sediment or foreign bodies.
Yearly • Fully overhaul and clean the machine.

Troubleshooting Guide
14
Note: For additional maintenance and repair information, reference this machine’s Service Manual.
Problem Cause Solution
Reduced or no
performance
Worn blast wheel or control cage Replace worn items
Belt tension Check and adjust belts
Valve does not close properly Close valve, stop motor, re-adjust valve
Too much abrasive admitted Motor must reach max. speed before opening valve
Feed motion too fast Reduce speed
Losing abrasive Bad seals Check base seals; readjust or replace
Elevation adjustment of magnets Check elevation is no higher than 5/16” (8 mm)
Magents lost eld Replace magnets
Filter unit Adjust reducing damper
Dumping or
losing abrasive
Poor abrasive quality Use quality abrasives
Worn blast wheel or seals Replace blast wheel or adjust/replace seals
Control cage is not correctly adjusted Align notches to 9:00 and 11:00 position
Magnets at wrong elevation Adjust elevation of magnets
Too much dust or sand in system Check lter
Valve is opening too far and allowing too much
shot into the blast wheel, causing the Amp draw
to be over 25 Amps
Reset the valve opening so the maximum Amp draw
isn’t higher than 20 Amps on the meter
Too much dust and other
particles in storage
Insufcient air ow towards ltration unit Check rated performance of the dust collector
Check all seats
Check dust hose
Check differential pressure and replace lter ele-
ments if pressure is too high
Motor does not start Missing phase Check power supply
Faulty switch or relays Diagnosis and replacement by electrician
Emergency stop Unlock emergency stop button
Motor stops during
operation
Current is too high Disconnect plug
Power supply circuit breaker is disengaged Reset circuit breaker or replace fuse
Motor is damaged Check motor

Warranty
15
National Flooring Equipment Inc. (referred to as “the Company”) warrants that each new unit manufactured by The Company, to be free from
defects in material and workmanship in normal use and service for a period of twelve (12) months from date of shipment from the Company. For
administrative ease, will honor warranty for a period of fteen (15) months from date of shipment from the company. Accessories or equipment
furnished and installed on the product by the Company but manufactured by others, including but not limited to: engines, motors, electrical com-
ponents, transmissions etc., shall carry the accessory manufacturers own warranty. Battery warranties are prorated over the warranty period.
Customer is responsible for the inspection of equipment / parts upon delivery. Freight damages reported beyond authorized time frame will not
be honored.
The Company, at its determination of defect, will repair or replace any product or part deemed to be defective in material or workmanship within
specied warranty time period. All product determinations and / or repairs will take place at the designated Company repair facility, or at a certi-
ed warranty location designated by the Company. The Company will coordinate and be responsible for all freight expenses associated with
valid warranty claims. Freight and shipping expenses associated with abuse or misuse will be back charged to the Distributor/Customer. The
Company reserves the right to modify, alter or improve any part / parts without incurring any obligation to replace any part / parts previously sold
without such modied, altered or improved part / parts. In no event shall the seller or manufacturer of the product be liable for special, incidental,
or consequential damages, including loss of prots, whether or not caused by or resulting from the negligence of seller and / or the manu-
facturer of the product unless specically provided herein. This warranty shall not apply to any products or portions there of which have been
subjected to abuse, misuse, improper installation or operation, lack of recommended maintenance, electrical failure or abnormal conditions and
to products which have been tampered with, altered, modied, repaired, reworked by anyone not approved or authorized by the Company or
used in any manner inconsistent with the provisions of the above or any instructions or specications provided with or for the product. Any and
all unauthorized onsite warranty work conducted by unauthorized personnel or any outside person(s), is not covered by the Company unless
the work has been pre-authorized by a predetermined manufacturer representative. This excludes wearable parts and/or consumables.
Defective or failed material or equipment shall be held at the purchaser’s premises until authorization has been granted by the Company to
return or dispose of defective products. Products returned for nal inspection must be returned with a manufacturer authorized Return Material
Authorization (RMA). Any unauthorized return of equipment will be declined at the dock by the Company. Any non-approved items returned
with approved returned items are subject to rejection and will not be credited. Credit will be issued for material found to be defective upon the
Company’s inspection based on prices at time of purchase.
TO OBTAIN SERVICE CONTACT NATIONAL FLOORING EQUIPMENT, INC. TOLL FREE AT 800-245-0267 FOR A REPAIR
AUTHORIZATION NUMBER. COD FREIGHT RETURNS WILL NOT BE ACCEPTED. FREIGHT COLLECT SHIPMENTS WILL
NOT BE ACCEPTED. WARRANTY REPAIRS MUST BE ACCOMPANIED BY DATE OF PURCHASE RECEIPT AND A RETURN/
REPAIR AUTHORIZATION NUMBER.
RETURN/REPAIR AUTHORIZATION NUMBER: _____________________________
MACHINE SERIAL NUMBER: ____________________________________________

9250 Xylon Avenue N • Minneapolis, MN 55445 • U.S.A.
Toll-free 800-245-0267 • Phone [phone] • Fax [phone] • Fax [phone]
Web Site: www.nationalequipment.com • E-Mail: [email protected]