Onfloor OF-2023 Guide

OF-2023
MULTI-PURPOSE
FLOOR MACHINE
SAFETY AND
MAINTENANCE
MANUAL W/PARTS LIST
This unit is intended for commercial use.
READ & FOLLOW ALL INSTRUCTIONS,
WARNINGS & CAUTIONS
BEFORE USING THIS FLOOR MACHINE
This floor machine will afford you many years of
trouble free operating satisfaction if it is given
proper care. All parts have passed rigid quality
control standards before being assembled to pro-
duce the finished product. Prior to packaging, the
units are again inspected for assurance of flawless
operation.
This floor machine was protectively packed to pre-
vent damage in shipment. We recommend that
upon delivery, remove the unit from its carton and
carefully inspect it for any possible damage in tran-
sit. A warranty card is affixed to the handle. It is
your responsibility to fill it out and send it to our
office to register your purchase and start your war-
ranty. Failure to send us this card in one week upon
receipt of the machine may void the warranty.
If damage is discovered, immediately notify the
transportation company that delivered your floor
machine. As a shipper, we are unable to act upon
any claim for concealed damage. You must origi-
nate any claim within 5 days of delivery.
These instructions are for your protection and
information. PLEASE READ CAREFULLY! Failure to
follow these precautions could result in injury or
discomfort.
Treat this floor machine as you would any other
high grade precision made product. Throwing,
dropping, unreasonable bumping across thresh-
olds and other misuse may result in a damaged
unit and invalidate the warranty.
PLEASE READ
CAREFULLY
BEFORE
OPERATING
Page 1
SAVE THESE INSTRUCTIONS
PN 493503 - OF-2023 Floor Machine- Printed in USA 09/08/08
AAddddrreessss
Parts and Service Center
777 South Street
Newburgh NY 12550-0606
PPhhoonnee::845/565/6623
FFaaxx::845/565/8894
®

GROUNDING
INSTRUCTIONS
This floor machine must be grounded. If it should
malfunction or breakdown, grounding provides a
path of least resistance for electrical current to
reduce the risk of electric shock. This machine is
equipped with a cord having an equipment-
grounded plug. The plug must be inserted into an
appropriate outlet that is properly installed and
grounded in accordance with all local codes and
ordinances
If repair or replacement of the cord or plug is nec-
essary, DO NOT connect the grounding wire to
either flat blade terminal. The wire with insulation
having an outer surface that is green with or without
yellow stripes is the grounding wire.
Improper connection of the equipment-grounding conductor can result in a risk of electrical
shock. Check with a qualified electrician or service person if you are in doubt as to whether the
outlet is properly grounded. DO NOT modify the plug provided with the machine. If it will not
fit the outlet, have a proper outlet installed by a qualified electrician.
NOTE: In Canada, the use of a temporary adaptor is not permitted by
the Canadian Electrical Code.
WARNING:
IMPORTANT
SAFETY
INSTRUCTIONS
To reduce the risk of fire, electric shock or injury;
Read all instructions before using this floor machine.
WARNING
Page 2
Improper use of the grounding plug can result in a risk of electrical shock.
DANGER:
1) DO NOT leave the floor machine plugged in
when not in use. Unplug from the outlet when not
in use and/or before servicing.
2) Electric shock could occur if exposed to rain.
Store indoors.
3) This is NOT a toy. Close attention is necessary
when used around or near children.
4) Use only as described in this manual. Use only
manufacturer's recommended attachments.
5) DO NOT use with damaged cord plug. If the
floor machine is not working as it should because
it has been dropped, damaged, left outdoors, or
dropped into water, contact the manufacturer or
authorized service center.
6) DO NOT pull or carry by cord, use power cord
as a handle, close a door on cord, or pull cord
around sharp edges or corners. DO NOT run floor
machine over the cord. Keep cord away from
heated surfaces.
7) DO NOT handle the plug or operate with wet
hands.
8) DO NOT put any object into motor openings.
9) DO NOT unplug by pulling on cord. To
unplug, grasp plug, not the power cord.
10) Keep hair, loose clothing, fingers and all parts
of body away from moving parts.
11) DO NOT use an optional vacuum without
the manufacturer’s filters in place.
12) DO NOT operate where anesthetics and oxy-
gen are used.
13) DO NOT use around flammable or com-
bustible liquids such as gasoline or use in areas
where they may be present.
14) DO NOT use an extension cord.
15) Replace damaged or worn parts immediately
with genuine Grind ’N Go equipment parts to main-
tain safety and protect your limited warranty.
16) Floor sanding can result in an explosive
mixture of fine dust and air. Use a floor sand-
ing machine only in a well ventilated area.
17) DO NOT to leave sawdust in the filter bag
when sander is not in use, this is a fire hazard.
This floor machine must be connected to a
properly grounded outlet only. (See ground-
ing method below.)

Page 3
1) Clear the floor of any materials or objects.
2) Ensure handle is in the storage position
(straight up) and locked in place with the
quick release pin.
3) Tilt the machine back until the handle is
laying on the floor and the three heads are
fully exposed.
4) Select the accessory set required for the
job.
5) Snap the accessory set onto the four metal
pins protruding from each of the three heads.
6) To replace, pull off the current accessory set
and replace with the new accessory set.
7) Carefully raise the handle, supporting the
axle with your foot to control the machine
head as it is placed on the floor.
8) Shift handle to the operating position and
lock in place with the quick release pin.
DO NOT attempt to operate this unit if the machine is not fully assembled.
When servicing or replacing an accessories turn OFF the machine and
disconnect from the power source.
Prior to operating the machine, tilt machine back on transport wheels,
turn ON the machine and carefully lower the machine onto the working surface.
CAUTION:
ATTACHMENTS
INSTALLATION
& CHANGING
When installing or changing the accessories, turn OFF the sander
and disconnect the power cord from the electrical outlet.
Before Installation or Changing of
Attachments:
1) Unplug the sander from the wall outlet.
2) Ensure handle is in the storage position
(straight up) and locked in place with the quick
release pin.
3) Tilt machine back by bracing it with your
foot until the handle is laying on the floor and
the three heads are fully exposed.
Note: It is recommended that a towel or pad is
placed under the machine to protect the floor.
Changing and Installation the
Attachments
1) Position the first attachment head at 12
o’clock.
2) Using both hands, reach beneath the bot-
tom side the attachment and pull up towards
yourself to free it from the sander.
3) Select the attachment required for the job,
and line up the holes on the attachment with
the four metal pins protruding from each of the
three heads.
4) Push the attachments on by hand and if nec-
essary, carefully tap it into place with a rubber
mallet.
5) Repeat steps 1 thru 4 with the remaining 2
attachments.
6) Carefully raise the handle, supporting the
axle with your foot to control the head of the
machine as it is placed on the floor.
7) Since the attachments are different heights
you may need to adjust the dust skirt to make
sure it is level with the attachments. This will
ensure clean and virtually dust-free operation.
9) To adjust skirt, align the skirt with the center
of the machine and wrap it around.
10) Move the handle back to the operating
position and lock in place with the quick
release pin.
CAUTION:
When installing or removing attachments, always wear protective gloves and start at the 12 o’clock position.
FLOOR MACHINE
OPERATING INSTRUCTIONS

OF-2023
HANDLE & BASE
ASSEMBLY DRAWING
& PARTS LIST
Page 4
____________________________________
Ref Part Description Qty Part
No No
____________________________________
1 Rubber Handle Grip 2 490180
2 Machine Switch 1 493074
3 Switch Box Plate 1 490105
4 50 Ft Power Cord w/30 AMP Twist Lock 1 493163
5 Handle Assembly 1 493147
6 Quick Release Pin w/Cable 1 456896
7 Motor Cord without Plug 1 490229
8 .37-16 X 1/2” Shoulder Bolt 2 491063
9 Bronze Bushing 2 491055
10 Wheel Base Assembly 1 490814
11 6” X 2” Wheel 2 490903
12 Palnut 2 490881
NS Strain Relief 1 434299C
NS GFCI 1 236780
____________________________________

Page 5
OF-2023
OUTER BOWL
ASSEMBLY DRAWING
& PARTS LIST
_________________________________
Ref Part Description Qty Part
No No
_________________________________
1 3 HP Motor, 3450 RPM’s 1 467456
2 14/3 Pigtail 1 495786
3 28# Weight (Optional) 1 492442
4 Nylock Nut 3 380784
5 Weight Knob 3 491632
6 Bowl Handle 2 490385
7 20” Outer Bowl Assembly 1 491942
8 Velcro Strip 1 492019
9a Rubber Dust Skirt (OF16L) 1 491926
9b Rubber Dust Skirt (OF16L-G) 1 223603
10
1
/ 4 -20 X .75” Screw 3 342831
11
1
/ 4 -20 X
5
/ 8 ” Screw 4 457310
12 1
3
/
4 ” External Snap Ring 1 491292
13 Felt Washer 1 450073
14 .37 Washer 4 368849
15 .38-16 X 1” Screw 4 368830
__________________________________

Page 6
________________________________
Ref Part Description Qty Part
No No
________________________________
12
7
/ 8 Internal Snap Ring 1 490598
2 Bearing (6009-2RS) 2 490563
3 Large Bearing Spacer 1 490571
4 Outer Pulley Shaft 3 490547
5 20” Inner Bowl 1 491810
6 Center Cog Pulley 1 494836
7 Shaft Spacer 3 490555
81
1
/ 2 Internal Snap Ring 3 490466
9 Ball Bearing w/Seals 6 464910
10 Small Bearing Spacer 3 490474
11 Flange 1 490989
12 Low Profile Bolt 1 490997
13 3” ID x 6” OD Ring 3 222828
14 #10-32 x .5 Phillips Screw 9 377201
15 Accessory Pins 12 490458
________________________________
________________________________
Ref Part Description Qty Part
No No
________________________________
16 .62-11 Nylock Nut 3 490628
17 Washer 3 490636
18 Felt Gasket 3 491373
19 Aluminum Ring 3 490652
20 Tubular Rivet 12 394068
21 .25-20 x .5 Phillips Screw 9 331740
22 #14, .43”OD Lockwasher 9 491012
23 Aluminum Cover Plate 1 491888
24a Belt 240-L050 (OF16L) 3 491918
24b Belt 240-L050 (OF16L-G) 3 223611
25 48 High Tooth Pulley 1 490512
26 48 Middle Tooth Pulley 1 490490
27 48 Low Tooth Pulley 1 490415
NS 1.5” Swivel Hose Connector 1 349445
________________________________
OF-2023
INNER BOWL
DRAWING &
PARTS LIST

MACHINE
MAINTENANCE
1) Unplug the machine.
2) After each use, wipe off machine with a
clean cloth.
3) Empty the vacuum you are using in accor-
dance with specific manufacturer’s safety &
operation instructions.
4) Check for loose parts and fasteners.
5) Check the power cord for any breaks in the
wire. Breaks will most likely occur near the
plug or switch. Repair or replace any breaks
immediately.
GENERAL
SAFETY
PRECAUTIONS
This machine is designed for surfacing concrete and sanding wood floors.
All operators and maintenance personnel should read and understand
the safety procedures with this floor machine.
CAUTION:
1) All personnel in the immediate work area
must wear safety glasses with side shields
whenever the machine is in operation.
Protective clothing is also recommended.
Long sleeve shirts and safety shoes should be
worn. Avoid wearing loose clothing.
2) DO NOT attempt to service or replace
attachments while the machine is running or
connected to a power source.
3) DO NOT operate this floor machine in the
rain or in areas where liquids could enter the
electrical components of the machine.
4) Keep the power cord away from the revolv-
ing heads to avoid damage.
5) Check the main power supply to assure that
you are connecting the equipment to a proper
dedicated service.
VACUUM
OPERATING
INSTRUCTIONS
The DIY-20PRO can be used with a variety of
vacuums to pick up wood and concrete dust.
Operation of the vacuum cleaner must be in
accordance with specific manufacturer’s
safety & operation instructions.
Recommend separate dedicated power
source for machine and vacuum.
The vacuum hose must be attached to the
1
1
/ 2 ” hose barb on the outer bowl of the
floor machine.
During operation, periodically check the
vacuum. When the cloth or paper filter bag
is
3
/ 4 full or dust is forming around the bottom
of the machine, it MUST be emptied.
IF THIS FLOOR MACHINE IS USED FOR SANDING,
DO NOT LEAVE SAWDUST IN THE FILTER BAG WHEN THE MACHINE
IS NOT IN USE. THIS IS A FIRE HAZARD.
WARNING
BELT CHANGING INSTRUCTIONS
1) Unplug the
motor power
cord from the
handle.
2) Pull the speed pin from the handle and
remove the handle. Carefully set handle aside.
3) Turn sander chassis upside down on a table
resting on the motor cover.
4) Remove pads/attachments (see page 3 for
instructions.)
5) Remove the 9 Flat head screws and beveled
washers from cover plate.
6) Remove the cover plate from inner bowl.
7) Vacuum up the dust and debris from inner
bowl.
8) Remove the old belt or belts by pulling
upwards and and roll off using a screwdriver
while turning the pulley.
9) Roll new belt or belts back on the pulley.
10) Reassemble the machine reversing the
above steps.
Page 7

A warranty card is affixed to the handle. It is your
responsibility to fill it out and send it to our office
to register your purchase and start your warranty.
Failure to send us this card in one week upon
receipt of the machine may void the warranty.
Please send the card to our attention:
Parts and Service Center
777 South Street
Newburgh NY 12550-0606
WARRANTY REGISTRATION
OF-2023
WARRANTY
Page 8
PN 493503 - OF-2023 Floor Machine- Printed in USA 09/08/08
We guarantee to the original purchaser this 20”
floor machine against defects in material and
workmanship for a period of 1 year from the date
of delivery. Please note the following conditions
pertaining to this warranty.
1) Applies only to the original owner and is not
transferable.
2) Machine will not have been dismantled or
tampered with in any way.
3) Covered components proven defective will
be repaired or replaced at no charge. Covered
components include motors, bearings, belts and
switches.
4) This warranty does not apply to any repair
arising by reason of misuse, neglect, or abuse, or
to proprietary parts.
5) This Warranty is in lieu of and excludes every
condition or warranty not herein expressly set out
and all liability for any form of consequential loss
or damage is hereby expressly excluded.
6) This Warranty is limited to repair or replacement
of covered components and reasonable labor
expenses.
PROBLEM: Motor will not run.
CAUSE SOLUTION
1) Defective switch. 1) Check switch, replace if defective.
2) Defective power cord or wiring. 2) Check and replace if defective.
3) Defective motor. 3) Have motor checked by an authorized service center.
4) Blown fuse or tripped circuit 4) Replace fuse or reset circuit breaker. If this does
breaker at wall panel. not correct the problem, have the sander
checked by an authorized service center.
5) Power cord not plugged in 5) Plug in power cord properly or replace
properly or damaged. power cord if damaged.
PROBLEM: Machine bogs down and runs slow.
CAUSE SOLUTION
1) Defective capacitor or switch. 1) Have machine checked by an authorized service center.
2) Circuit may be overloaded with 2) Plug floor machine into a dedicated power outlet.
more than one appliance. If the problem still exists there could be a short.
Have the floor machine checked by an
authorized service center.
3) Low line voltage in building. 3) If wiring is old in the building have voltage
checked by the power company.
PROBLEM: Motor runs, driver will not rotate.
CAUSE SOLUTION
1) Belts are broken. 1) Contact the manufacturer or authorized service center.
PROBLEM: Noisy machine or vibration.
CAUSE SOLUTION
1) Defective motor. 1) Contact the manufacturer or authorized service center.
2) Attachment is not level or 2) Level attachment and make sure all fasteners are secure.
securely attached.
TROUBLE
SHOOTING
GUIDE