National Flooring Equipment 550 User manual

Read Manual Before Servicing Machine
402990 Rev F
550 ADJUSTABLE HANDLE
WALK-BEHIND SCRAPER
SERVICE MANUAL

Table of Contents
3
Table of Contents .......................................................................................................................................................... 3
Specications ................................................................................................................................................................ 4
Safety.............................................................................................................................................................................. 5
Troubleshooting Guide ................................................................................................................................................. 7
Maintenance................................................................................................................................................................... 8
Maintaining Equipment .......................................................................................................................................... 8
Parts List and Diagrams ............................................................................................................................................... 9
Overall Machine..................................................................................................................................................... 9
Frame and Wheel Assembly................................................................................................................................ 10
550-11 Wheel Adjustment Assembly ....................................................................................................................11
Cutting Head........................................................................................................................................................ 12
Motor.................................................................................................................................................................... 13
Switch-Domestic Machines.................................................................................................................................. 14
Switch-International Machines............................................................................................................................. 15
Counterweight...................................................................................................................................................... 16
Upper Handle....................................................................................................................................................... 16
Labels .................................................................................................................................................................. 17
Accessories ......................................................................................................................................................... 17
Wiring Diagram .................................................................................................................................................... 18
Warranty ....................................................................................................................................................................... 19

4
Specications
4
Adjustable Handle
Foot Bar
Angle Adjustment
Lift Handle
Cutting Head
Machine Variants
Region Serial Number Input Power Body Panels
Domestic
550-10XXXX 120V / 60 Hz Silver Vein
550-12XXXX 120V / 60 Hz Green
550-23XXXX 120V / 60 Hz Silver Vein
International
550-11XXXX 230V / 50 Hz Silver Vein
550-13XXXX 230V / 50 Hz Silver Vein
550-20XXXX 110V / 50 Hz Silver Vein
550-27XXXX 230V / 50 Hz Silver Vein
550-29XXXX 230V / 50 Hz Silver Vein
Product Specications
Width Max.
Length Height
Weight
(Machine
Only)
Speed RPM Amps
Vibration
X Axis Y Axis Z Axis
17.75”
(45 cm)
32.5”
(83 cm)
42.5” (108 cm)
with handle
21” (53 cm)
without handle
123 lb
(55.8 kg) Manual 1,725 Under 10 5.5 m/s211.1 m/s211.6 m/s2

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. Extreme heat or cold may affect performance.
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.
Do not come within 3 ft. of the machine’s perimeter during
operation.
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

Safety
WALK-BEHIND SCRAPER 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.
SCRAPING
Beware of hidden obtrusions.
Watch out for hidden dangers and protrusions in ooring. Do not
use on largely uneven surfaces.
Observe location of electrical supplies and extension cords.
Do not allow cutting heads to come into contact with any electrical
supply or extension cord.
Use correct tooling and accessories.
Provide barriers or shields as needed to protect others from debris.
After mounting tooling, check for proper alignment.
Use for correct applications.
Do not force equipment to do heavier duty work than it was made
for.
Safety

Troubleshooting Guide
Problem Cause Solution
No power Insufcient power Inspect electrical cord for damage
Switch/Circuit Check if circuit breaker and/or switch are
tripped
Motor noise Fan guard is malfunctioning Ensure fan guard is not bent
Machine is hard to handle Machine is too heavy Remove counterweight
Blade is too large Change to a smaller blade size
Blade is too dull Sharpen blade
Blown fuses or circuit breakers Wrong extension cord Use appropriate extension cord (see Safety)
Poor quality outlet Move to a different outlet or better circuit
Rattling Loose fasteners Check for loose nuts and bolts and re-tighten
Worn out isolators Replace isolators
Difculty inserting shank Shank holder is too tight Remove paint from shaft of the shank with
sandpaper, emery cloth, or a solvent
7

Maintenance
MAINTAINING EQUIPMENT
Keep equipment in good repair by adopting a regular maintenance program.
On a daily basis, complete the following:
• Examine the general condition of equipment.
• Inspect guards, switches, and cords for damage.
• Check for loose screws, misalignment, binding of moving parts, improper mounting, broken parts and any other conditions that may affect
safe operation.
If abnormal noise or vibration occurs, turn the equipment off immediately and have the problem corrected before further use. Do not use dam-
aged equipment. Tag damaged equipment “DO NOT USE” until repaired.
During maintenance checks or regular inspections, complete the following:
• Perform mechanical inspection.
• Clean pulleys, spindles, bearings, housing, etc.
• Perform electrical inspection (switch, cord, plugs, etc.).
• Check nuts on shock absorbers and bottom plates.
• Check all screws and ttings for a tight and secure t.
• Sharpen dull blades.
• Clean dust and debris from vents.
• Keep the equipment handle clean, dry, and free of oil or grease.
Use only mild soap and a damp cloth to clean. Some cleaning agents and solvents are harmful to plastic and insulated parts. Do not clean with:
gasoline, turpentine, lacquer thinner, paint thinner, chlorinated cleaning solvents, ammonia, or any household detergents containing ammonia.
Never use ammable or combustable solvents around equipment.
Note: Machine is pressure washable. Motor, motor junction box, capacitor box, and switch are protected from splashes of water but must not be
subjected to jets of high pressure. Thoroughly dry machine before use. Do not use machine when wet or damp.
8
WARNING: ALWAYS UNPLUG MACHINE BEFORE MAINTAINING. NEVER DISASSEMBLE THE TOOL OR TRY TO DO ANY REWIRING ON
THE TOOL’S ELECTRICAL SYSTEM. FAILURE TO DO SO COULD CAUSE DAMAGE TO MACHINE OR SERIOUS INJURY. CONTACT NFE
FOR ALL REPAIRS.

Parts List and Diagrams
9
COUNTERWEIGHT
MOTOR
FRAME
CUTTING HEAD
WHEEL ASSEMBLY
UPPER HANDLE
ADJUSTMENT SHAFT
SWITCH
OVERALL MACHINE

10
Parts List and Diagrams
12
13
11 10
8 9
7
5
2
4
5
6
3
1 14
15
ITEM
NO.
PART NUMBER DESCRIPTION QTY.
1 402411-SV
FRAME, BASE, Silver Vein (550-10XXXX, 550-23XXXX,
550-11XXXX, 550-13XXXX, 550-20XXXX 550-27XXXX,
550-29XXXX ONLY)
1
1
402411-G FRAME, BASE, Green (550-12XXXX ONLY) 1
2
550-11 Assembly, Wheel Adjustment 1
3 72901
"O"-Ring 2
4
500-25 Bracket, Wheel Leg 2
5
550-29 Wheel, 2-1/2 Center 2
6 73521
5/8-11x14 HHCS 1
7 73525
Nut, 5/8-11 Nylock 1
8 73424
Washer, Flat, Zinc SAE 1/2 2
9 73406
Bolt, Hex Head Cap 1/2-13x1-1/4 2
10 402380
DAMPER, RUBBER 2
11
550-8 Bracket Cover 2
12
63-P30 Clamp, Wire 3/8 2
13 73001 Bolt, Wizlock 1/4-20x1/2 4
14 73240
3/8-16x1.0 T-KNOB 2
15 73402
Nut, Nylock, 1/2-13 2
FRAME AND WHEEL ASSEMBLY

Parts List and Diagrams
11
550-11 WHEEL ADJUSTMENT ASSEMBLY
5
89
15 11
10 14
7
10
3
4
12
1
6
13
2
550-11
ASSEMBLY, WHEEL ADJUSTMENT
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 550-12D WHEEL, ADJUSTMENT 1
2
550-4 T-BAR, ADJUSTMENT 1
3
550-5 PLATE, BEARING 1
4
550-5B COLLAR, SHAFT 7/8 1
5
550-6 SHAFT, ADJUSTMENT 1
6
5600-83 SPACER, ROUND, .375 X .500 X .875 1
7 71101 Bearing, 7/8 ID, R14-2RS 1
8 73008
Nut, Nylock 1/4-20 1
9 73013
1/4-20x1-1/4 HHCS 1
10 73102
SPACER, .16x1ODx.88 ID 2
11 73202
WASHER, INTERNAL LOCK, 3/8 1
12 73207
NUT, NYLOCK, 3/8-16 1
13 73249
3/8-16x2 SHCS 1
14 73308
5/16-18x3/4 BSCS 1
15 74749 GROMMET, RUBBER 3/8" 1

10
3
7
8
1
2
5
4
6
9
12
11
(FRAME)
13
15
14
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 73259 3/8-16 X 3/4 HHFS, SERRATED 4
2 70810
Isolator, Vibration 4
3
5280-8 Cutting Head 1
4 71131
Bearing 1-1/4 ID, SBLF 206-20 1
5 74651
Bolt, Wizlock, M10-1.5 x 30mm, Class 8.8 2
6 74654
M10-1.50 Flanged Nut, Serrated 2
7
5280-136 Cover, Blade 1
8 74649
Screw, Button Head Cap w/ Flange M10-25 2
9 73211
Nut, Flange, Serrated, 3/8-16 4
10
505-1000 Cover, Bottom Plate 1
11 73308
5/16-18x3/4 BSCS 4
12 73322
Nut, Nyloc, 5/16-18 4
13
5280-137W Wrench, Blade, 6mm 1
14 552
Shank, Angle 2-1/2 x 4 (Optional) 1
15 551
Holder, Angle Shank (Optional) 1
Parts List and Diagrams
12
CUTTING HEAD
Angle Shank
(Optional)

Parts List and Diagrams
13
MOTOR
2
9
10
11
8
7
4
5
16
3
6
1
17
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 550-23 Capacitor 1
2 62180
Motor Fan Cover 1
3 62181
Motor Fan (Not Shown) 1
4 62182
Cover, Capacitor, Leeson 1
5 62190
Electric Box Only 1
6 62191
Electrical Box Cover Only 1
7 72351
Motor 1 HP, 116691.00 1
8 73259
Bolt, Flange, Serrated, SAE 3/8-16 X 3/4 4
9 73902
Key, Woodruff, 3/16" 1
10
550-101 Eccentric, 1.250 OD X .875 ID 1
11 73039
Screw, Set, 1/4-20x3/16 3
12 72810
Caps, Splice, (Not Shown) 2
13 72811
Caps, Insulator, Splice (Not Shown) 2
14 74730
Grommet, Rubber 5/8" (Not Shown) 1
15
72351-10
Spring, 50 Hz (Not Shown)(550-11XXXX, 550-13XXXX,
550-20XXXX, 550-27XXXX, 550-29XXXX ONLY)
2
16 73502
Strain Relief, Straight 1/2 Inch 1
17 73401
Nut, Strain relief, steel, 1/2" 1

Parts List and Diagrams
14
SWITCH - DOMESTIC MACHINES
3
4
5
12 67 78
9 10
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 500-12 Cord, Power, Molded 5-15P Plug, 19" 1
2
550-15 Box, Electrical Without Cover 1
3
6280-207 Switch, On-Off 1
4 74510
Screw, Phillips Pan Head Machine 6-32 x 3/8 2
5
550-18 Gasket, Electrical Box 1
6 72565
Wire, 14/3 2.5'
7 73502 Strain Relief, Straight 1/2 inch 2
8 92819
Disconnect, Quick, Nylon, 16-14 Gauge 4
9 72768
Terminal, 12-10 Gauge, Nylon C, 10 1
10 72821
Terminal, Ring, 16-14 Gauge, Nylon, 10 Stud 1

Parts List and Diagrams
15
SWITCH - INTERNATIONAL MACHINES
6
1
2
5
4
3 7
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 403865 Bracket, Mount, Switch 1
2 73001
Bolt, Wizlock 1/4-20x1/2 2
3 403871
Switch, Safety, 110V, 50Hz, UK (550-20XXXX) 1
3 403872
Switch, Safety, 230V, 50Hz (550-11XXXX, 550-13XXXX, 550-27XXXX,
550-29XXXX)
1
4 403797
Screw, Phillips Pan Head, M5-0.8 x 50mm 2
5 401517
Nut, M5-.80 Nylock 2
6 403870
Plug, Male, IEC 60309, 110-130V, 16A, 3W, Yellow (550-20XXXX) 1
6 72715
Plug, Male, AU1-10P, 250V, 10A (550-13XXXX) 1
6 401438
Plug, Male, EU1-16P, 250V, 16A (550-11XXXX) 1
6 401551
Plug, Male, UK1-13P, 250V, 13A (550-27XXXX, 550-29XXXX) 1
7 72821
Terminal, Ring, 16-14 Gauge, Nylon, 10 Stud 1

Parts List and Diagrams
16
2
1
1
2
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 550-28-SV
Counterweight, Front, Cast, Silver Vein (550-10XXXX,
550-23XXXX, 550-11XXXX, 550-13XXXX, 550-20XXXX
550-27XXXX, 550-29XXXX ONLY)
1
1
550-28-G Counterweight, Front, Cast, Green (550-12XXXX ONLY) 1
2 73273
3/8-16x3/4 Screw, Thumb 2
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
1 62140 Upper Handle 1
2
500-15 Grip, Handle (Pair) 1
COUNTERWEIGHT
UPPER HANDLE

ITEM
NO.
PART
NUMBER
DESCRIPTION Qty.
1 403356 Kit, Labels, 550, English 1
2 402627
Label, 1.5 x 2 (550-23XXXX Only) 3
3 403866
Label, CE, 550, 230V, 50 Hz (550-11XXXX, 550-13XXXX, 550-27XXXX,
550-29XXXX Only)
1
4 403867
Label, CE, 550, 110V, 50 Hz (550-20XXXX Only) 1
PART
NUMBER
DESCRIPTION QTY.
5170 Blade Kit 1
Parts List and Diagrams
17
LABELS
ACCESSORIES
DomesticInternational

Parts List and Diagrams
18
T1
T3
T8
T2
T4
T5
MOTOR
PLUG
BLACK
WHITE
GREEN
WHITE
BLACK
GREEN
ON/OFF
SWITCH
4L 5L
1N 2N
JUNCTION
BOX
550 MACHINE WIRING
WIRING DIAGRAM

Warranty
19
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: ____________________________________________
19

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]