en english - Grand Rental Station

Contents of this Book
Operator’s Manual - Section I
Operator Safety Instructions................................................................................ 3
Machine Specifications........................................................................................ 6
Sanding Cuts and Sandpaper............................................................................. 7
Machine Set-Up................................................................................................... 8
Operating Instructions......................................................................................... 9
Adjustment Procedures..................................................................................... 10
Routine Maintenance ........................................................................................ 10
Maintenance...................................................................................................... 11
Parts Manual - Section II.......................................................................... 33-38
WARNING: The Products sold with this Manual contain or may contain chemicals that are known to
certain governments (such as the State of California, as identified in its Proposition 65 Regulatory Warning
Law) to cause cancer, birth defects or other reproductive harm. In certain locations (including the State of California) purchasers of these Products that place them in service at an employment job site or a publicly accessible space are required by regulation to make certain notices, warnings or disclosures regarding the chemicals
that are or may be contained in the Products at or about such work sites. It is the purchaser’s responsibility to
know the content of, and to comply with, any laws and regulations relating to the use of these Products in such
environments. The Manufacturer disclaims any responsibility to advise purchasers of any specific requirements
that may be applicable to the use of the Products in such environments.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R
When you see this symbol, it means: Refer
to instruction manual/booklet
When you see this symbol, it means:
Wear eye protection.
General Power Tool Safety Warnings
WARNING: Read all safety warnings and instructions. Failure to follow warnings and instructions may result in electric
shock, fire and or serious injury.
Save all warnings and instructions for future use.
The term “power tool” in the warnings refers to your main-operated (corded) power tool or battery operated (cordless) power tool.
Work area safety
Keep work area clean and well lit. Clutter or dark areas invite accidents.
Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gasses, or dust. Power tools
create sparks which may ignite the dust or fumes.
Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
Electrical safety
Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded)
power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators. There is an increased risk
of electric shock if your body is earthed or grounded.
Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp
edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of cord suitable for outdoor use reduces the
risk of electric shock.
If operating a power tool in a damp location is unavoidable, use a ground fault circuit protected supply. Use of a ground fault circuit
protector reduces the risk of electric shock.
Personal safety
Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are
tired or under the influence of drugs, alcohol, or medication. A moment of in attention while operating power tools may result in serious
personal injury.
Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safety shoes, hard
hat, or hearing protection used for appropriate conditions will reduce personal injury.
Prevent unintentional starting. Ensure switch is in off-position before connecting to power source, picking up, or carrying the tool.
Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
Removing any adjustment wrench or key before turning the power tool on. A wrench or key left attached to a rotating part of the power
tool may result in personal injury.
Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing and gloves away from moving parts. Loose clothes,
jewelry, or long hair can be caught in moving parts.
If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used.
Use of dust collection can reduce dust related hazards.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R - 3 -
Power tool use and care
1. Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at
the rate it was designed.
2. Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous
and must be repaired.
3. Disconnect the plug from the power source and from the power tool before making any adjustments, changing accessories or
storing the power tool. Such preventative safety measures reduce the risk of starting the power tool accidently.
4. Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to
operate the power tool. Power tools are dangerous in the hands of untrained users.
5. Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect
the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained
power tools.
6. Use the power tool, accessories and tool bits ect. in accordance with these instructions, taking into account the working conditions
and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
Have the power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the
power tool is maintained.
Safety Warnings For Sanding Operations
1. This power tool is intended to function as a sander. Read all safety warnings, instructions and specifications provided with this
power tool. Failure to follow all instructions listed below may result in electric shock, fire, or personal injury.
2. Operations such as grinding, wire brushing, polishing or cutting-off, are not recommended to be performed with this power tool.
Operations for which the tool was not designed may create a hazard and cause personal injury.
3. Do not use accessories which are not specifically designed and recommended by the tool manufacturer. Just because the accessory
can be attached to your power tool, it does not assure safe operation.
4. The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster
than their rated speed can break and fly apart.
5. The outside diameter and thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized
accessories cannot be adequately guard or controlled.
6. The arbor size of wheels, flanges, backing pads or any other accessory must fit the spindle of the power tool. Accessories with arbor
holes that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.
7. Do not use damaged accessory. Before each use inspect the accessory such as abrasive wheel for chips or cracks, backing pad
for cracks, tear or excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or
install an undamaged accessory. After inspecting or installing an accessory, position yourself or bystanders away from the plane
of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break
apart during this time.
8. Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate,
wear dust mask, hearing protectors, gloves and workshop apron capable of stopping flying debris generated by various operations.
The eye protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator must be capable of
filtering particles generated by your operations. Prolonged exposure to high intensity noise may cause hearing loss.
9. Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment.
Fragments of work piece or a broken accessory mayfly away and cause injury beyond immediate area of operation.
10. Hold power tool by gripping insulated surfaces (handle) only, when performing an operation where the cutting accessory may
contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and
shock the operator.
11. Position the cord clear of the spinning accessory. If you loose control, the cord may be cut or snagged and your arm or hand may be
pulled into the spinning accessory.
12. Never lay the power tool down until the accessory has come to a complete stop. The spinning accessory may grab the surface and pull
the power tool out of your control.
13. Do not run the power tool while carrying it at your side. Accidental contact with the spinning accessory could snag your clothing, pulling
the accessory into your body.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R
14. Regularly clean the power tools air vents. The motor’s fan will draw the dust inside the housing and excessive accumulation may cause
electrical hazards.
15. Do not operate the power tool near flammable materials. Sparks could ignite these materials.
16. Do not use excessively oversized sanding disc paper. Follow manufacturer’s recommendations when selecting sanding paper.
Larger sanding paper extending beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc or
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes
rapid stalling of the rotating backing pad which in turn causes uncontrolled power tool to be forced in the opposite direction of the backing pad’s
rotation at the point of the binding.
For example, if an abrasive wheel is snagged or pinched by the work piece, the edge of the wheel that is entering into the pinch point can dig into
the surface of the material causing the wheel to climb out or kick out. The wheel may either jump toward or away from the operator, depending on
direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and incorrect operating procedures or conditions and can be avoided by taking proper precautions as
given below.
Maintain a firm grip on the power tool and position your body and arms to allow you to resist kickback forces. Always use auxiliary
handles, if provided for maximum control over kickback or torque reactions during start up. The operator can control torque reactions
or kickback forces, if proper precautions are taken.
Never place your hand near the rotating accessory. Accessory may kickback over your hand.
Do not position your body in the area where power tool will move if kickback occurs. Kickback will propel the tool in the direction
opposite to the wheel’s movement at the point of the snagging.
Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or
bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.
Additional Rules For Safe Operation
Empty the dust bag or dust collection receiver frequently. Do not leave residue in dust bag or dust collection receiver unattended.
Always empty in a non-combustible metal container. Sanding wood or varnish produces dust that can self ignite and cause injury or
damage. Follow this precaution for storage.
Set all exposed nails. Sweep loose abrasive away from work area. Do not strike metal pipes, ect., with sanding paper. Striking metal
or abrasive particles with sanding paper produces sparks that could ignite the sanding dust which can cause injury or damage.
Do not operate a partially assemble power tool. Keep all adjustments within manufacturer’s specifications. Keep all fasteners tight.
Operating a partially assembled power tool could result in injury to the operator or bystander and could cause damage to the equipment or
Do not attempt to change the sanding paper while the power tool is running. The sanding pad can snag clothing and cause injury to
limbs and moving sanding paper can cause abrasions.
The power tool should only be used on an electrical system (mains) that is rated for the electrical requirements of the power tool as
shown on the nameplate. Use only on an earthing (grounded) system. Do not service the power tool if it is energized or connected
to an electrical circuit. Improper use could cause fire or electric shock.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R - 5 -
Control Switch
Dust Collection Bag
Operating Handles
Abrasive Wrench
Steel Reinforced Molded Rubber Sanding Pad
Wall Guard
Work Light
Electrical Rating
Storage Case
Abrasive Size
Disc Rate
Disc Driver System
Power Cable
Dust Collection
Dust Control Rate
115V, 12.0 A, 50-60 Hz
7” x 7/8” Dia. Disc
2800 RPM
Gear Driven
14-3 Gray Rubber
110 CFM
115V ~, 60 Hz
7” x 7/8” Dia. Disc
2800 RPM
Gear Driven
14-3 Gray Rubber
110 CFM
230V, 6.0 A, 50 Hz
7” x 7/8” Dia. Disc
2800 RPM
Gear Driven
14-3 Gray Rubber
110 CFM
Clarke® American Sanders Operator’s Manual (EN) - Super 7R
Initial Cut
The purpose of the initial cut is to remove old finish and gross imperfections on the floor surface. A coarse abrasive should be used.
If glazing, loading, or burning takes place immediately into an initial cut, select a coarser abrasive. If this should occur during an initial
cut, the abrasive has dulled and must be replaced.
Final Cuts
The purpose of a finishing cut is to remove the scratches produced during the initial cut. Use a fine (60 - 80 grit) grain abrasive.
If the surface remains rough after a finishing cut, it may be necessary to use an even finer grain of abrasive (80 - 100 grit). Care
should be taken in selecting the grit size of the abrasive. A very fine grain will close the pores on a wood floor making admission of a
stain difficult.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R - 7 -
This sanding machine is designed to be operated with a remote vacuum
dust collection system or with the included dust bag.
Preparing Remote Vacuum Dust Collection Systems
2” Hose from
vacuum system
(not included)
1.5” Hose from
vacuum system
(not included)
To prepare the machine for remote vacuum dust collection systems that
have a 2” hose end, follow this procedure:
1. Install 2” hose end (figure 1, A) directly over the exhaust tube (figure 1,
2. The exhaust tube can be rotated for optimum convenience.
To prepare the machine for remote vacuum dust collection systems that
have a 1 ½” hose end, follow this procedure:
1. Install the 2” x 1½” hose end adaptor (Part No. 30563A) (figure 1, C)
over the exhaust tube (figure 1, B).
2. Insert 1 ½” hose end (figure 1, D) into the adaptor (figure 1, C).
NOTE: Start the remote vacuum collection system before operation.
Preparing to use the included dust bag
To prepare the machine for use with the included dust bag (Part No.
53544B), follow this procedure:
Exhaust Tube
(30563A) 2” Tube x 1.5” hose adaptor
Figure 1
Install the dust bag by
pressing the end onto the
exhaust tube until the ring
locks into the groove.
1. Install the dust bag by pressing the end onto the exhaust tube until the
ring locks into the groove (figure 2). This is best done by pressing on
the back of the bag opening with the palm of your hand.
2. The exhaust tube can be rotated for optimum convenience.
3. To remove the dust bag from the exhaust tube, pry up the end of the
bag opening to partially release the internal rib from the groove, then
4. To empty the dust bag, unzip the disposal flap and force contents out
by inverting the bag.
NOTE: For best results, empty frequently. Follow all warnings posted
in this manual and on the dust bag.
Figure 2
Clarke® American Sanders Operator’s Manual (EN) - Super 7R
Preparing the Machine for Operation
1. Familiarize yourself with the machine. Read all danger, warning, and caution
statements and the Owner’s Manual before operating this machine. If you or
your operator cannot read English, have this manual explained fully before
attempting to operate this machine.
2. Remove screw and abrasive retainer. Center abrasive on pad and secure with
abrasive retainer and screw. (Figure 3)
3. Return machine to upright position and tilt machine back on casters until it
comes to rest on the exhaust bracket. Machine will be in a reclined position.
Do not allow machine to rest on pad especially after use, or compression set
may take place within elastomer on pad. This will create a flat spot and bounce
during use. (Figure 4)
1. Move machine to the location of your work. Set any exposed nails with hammer and punch to avoid encounter with abrasive.
Figure 3
WARNING: Bodily injury could occur if power is applied to
the machine with the power switch already in the “ON” position. Always
check to assure that the power switch is in the “OFF” position before
applying power to the power cable.
2. Make sure the control switch is in the “Off” position then connect the supply
cable to an appropriately grounded fused circuit. Connect the supply cable to
the motor pigtail. (Figure 5)
3. With the machine in the reclined position firmly grasp both handles and flip the
control switch to the “ON” position. (Figure 4.)
Gradually lower pad to surface intended for sanding. Make sure the machine is in motion while the pad is engaged with the surface to be sanded.
You may use broad circular motion as you sand along the length of the
surface or your may use a combination of forward and sideward motions.
In time you will develop your own technique to optimize coverage and dust
recovery. It is advisable to not add effort to the pad as this may lead to “nosing in” or “tipping” which produces grooves or lines on the surface.
When replacing abrasive, emptying the contents of the dust bag, or sanding
operation is completed, return machine to reclined position, flip control
switch to “Off” then disconnect the motor pigtail from the supply cable.
Empty dust bag whenever it becomes 1/3 full.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R Figure 4
Figure 5
- 9 -
DANGER: Failure to disconnect the supply cable
from machine whenever servicing, replacing abrasive, or emptying
the dust bag could result in electrocution or severe injury. Never
leave machine unattended while the supply cable is connected.
DANGER: Never leave dust bag unattended with
sanding dust in it. Sanding dust can spontaneously ignite and cause
a fire or explosion. Empty dust bag into a metal container, clear of
any combustibles. Do not empty content into a fire. Do not overfill
dust bag.
To level machine: Grasp caster adjusting screw “A” with an appropriate
tool (pliers ect.). Using a similar tool, loosen locknut “B” with a counter
clockwise motion. (Figure 6).
Condition - Pad creates ridges on both edges or a “hop” is experienced:
Rotate both adjusting screws equal amounts clockwise. Tighten locknuts
and test on a piece of plywood. Repeat procedure until condition is corrected. We recommend you not exceed 1/8” rotation for each attempt.
Condition - Pad creates a ridge on the tip of the pad: Rotate both adjusting screws counter clockwise, tighten locknuts and test. Repeat procedure until condition is corrected. Use only 1/8 rotation for each attempt.
Condition - Pad creates a ridge on only one side of the pad: Either rotate
the adjusting screw of the side effected clockwise or rotate theadjusting screw opposite counterclockwise, depending on whether the ridge
terminates beyond the tip of the pad or prior to it. If it is prior to the tip,
adjust the side effected, otherwise adjust the opposite side.
Figure 6
CAUTION: Failure to perform maintenance at
recommended intervals may void warranty.
To insure reliable performance, have armature and pad driver
bearings inspected for wear or damage after every 1500
hours. If used heavily, have the bearings replaced seasonally.
Carbon Brushes
Have the carbon brushes replaced at least every 500 hours and more Lubrication
frequently under heavy use.
Dust Bag
Periodically the dust bag should be turned inside out, shaken vigorously and machine washed in cold water
to prevent pore blockage and loss of dust control.
The machine comes fully lubricated. The gears in the gear
box have enough lubrication for approximately six months of
normal operation. Have the lubricant changed at least every
6 months or more frequently under heavy use.
Clarke® American Sanders Operator’s Manual (EN) - Super 7R