Cornwell Tools CAT300MP User manual

CAT300MP 1 revised 02/21/17
CAT300MP
3" Mini Polisher
Operating Instructions • Warning Information
• Parts Breakdown
Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to cause
cancer, birth defects or other reproductive harm. Some examples of
these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry
products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do
this type of work. To reduce your exposure to these chemicals: work
in a well ventilated area, and work with approved safety equipment,
such as those dust masks that are specially designed to filter out
microscopic particles.
Max. Free Speed: ............................2,500 RPM
Air Inlet: ....................................1/4" NPT
Recommended Hose Size:.......................3/8" I.D.
Recommended Air Pressure: ....................90 PSIG
Air Consumption:............................... 4 CFM
Length: ........................................4.55"
Net Weight: ...................................1.5 lbs.
Sound Pressure: ...............................88dBA
Sound Power: .................................95dBA
Vibration Level: ...............................2.2m/s2
SPECIFICATIONS
WARNING
RATED RPM OF THE
ACCESSORY USED MUST
EXCEED THE MAXIMUM
TOOL RPM SHOWN
ALWAYS READ
INSTRUCTIONS BEFORE
USING POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
ALWAYS WEAR
HEARING PROTECTION
ALWAYS WEAR
BREATHING APPARATUS
AVOID PROLONGED
EXPOSURE TO
VIBRATION
RPMRPMRPM
WARNING

CAT300MP 2 revised 02/21/17
THIS INSTRUCTION MANUAL CONTAINS IMPORTANT
SAFETY INFORMATION.
READ THIS INSTRUCTION MANUAL CAREFULLY AND
UNDERSTAND ALL INFORMATION BEFORE OPERATING
THIS TOOL.
It is the responsibility of the owner to make sure all
personnel read this manual prior to using the tool. It is also
the responsibility of the device owner to keep this manual
intact and in a convenient location for all to see and read.
If the manual or product labels are lost or not legible,
contact Cornwell Tools for replacements. If the operator
is not fluent in English, the product and safety instructions
shall be read and discussed with the operator in the
operator's native language by the purchaser/owner or his
designee, making sure that the operator comprehends its
contents.
• Always operate, inspect and maintain this tool in
accordance with American National Standards Institute
Safety Code of Portable Air Tools (ANSI B186.1) and any
other applicable safety codes and regulations.
• For safety, top performance and maximum durability of
parts, operate this tool at 90 psig; 6.2 bar max air
pressure with 3/8" diameter air supply hose.
• Always wear impact-resistant eye when operating
or performing maintenance on this tool (users and
bystanders).
• Always wear hearing protection when using this tool.
High sound levels can cause permanent hearing loss.
Use hearing protection as recommended by your
employer or OSHA regulation (users and bystanders).
• Keep the tool in efficient operating condition.
• Always wear breathing apparatus.
• To reduce exposure to sanding debris, work in a well
ventilated area with proper personal protection
equipment.
• Operators and maintenance personnel must be
physically able to handle the bulk, weight and power of
this tool.
• Air powered tools can vibrate in use. Vibration, repetitive
motions or uncomfortable positions over extended
periods of time may be harmful to your hands and arms.
Discontinue use of tool if discomfort, tingling feeling or
pain occurs. Seek medical advice before resuming use.
• Air under pressure can cause severe injury. Never direct
air at yourself or others. Always turn off the air supply,
drain hose of air pressure and detach tool from air supply
before installing, removing or adjusting any accessory
on this tool, or before performing any maintenance on
this tool. Failure to do so could result in injury. Whip
hoses can cause serious injury. Always check for
damaged, frayed or loose hoses and fittings, and replace
immediately. Do not use quick detach couplings at tool.
See instructions for correct set-up.
• Slipping, tripping and/or falling while operating air
tools can be a major cause of serious injury or
death. Be aware of excess hose left on the walking
or work surface.
• Keep body working stance balanced and firm. Do
not overreach when operating the tool.
• Anticipate and be alert for sudden changes in motion
during start up and operation of any power tool.
• Do not carry tool by the hose. Protect the hose from
sharp objects and heat.
• Tool shaft may continue to rotate briefly after throttle
is released. Avoid direct contact with accessories
during and after use. Gloves will reduce the risk of cuts
or burns.
• Keep away from rotating end of tool. Do not wear
jewelry or loose clothing. Secure long hair. Scalping
can occur if hair is not kept away from tool and
accessories. Choking can occur if neckwear is not
kept away from tool and accessories.
• Use accessories recommended by Cornwell Tools.
• RPM OF THE ACCESSORY MUST EXCEED TOOL RPM.
Use accessories rated at 2,500 RPM or higher.
• Do not lock, tape or wire the "on/off" safety lever in the
"on" position, as the lever must be free to return to the
"off" position when released.
• Do not use accessories which are not specifically
designed and recommended by the tool manufacturer.
• Never use grinding wheels, wire brushes or cutoff
wheels with this tool.
• Do not lubricate tools with flammable or volatile liquids
such as kerosene, diesel or jet fuel.
• Do not force tool beyond its rated capacity.
• Do not remove any labels. Replace damaged labels.
• This tool is not insulated against electric shock.
• Keep tool out of reach of children.
• Do not point or indulge in any horseplay with this tool.
• Note direction of rotation BEFORE operating this tool.
• This tool must not be used in explosive atmospheres.
• Do not use (or modify) the tool for any other purpose
than that for which it was designed without consulting
the manufacturer's authorized representative.
• Servicing and repairs should only be made by an
authorized service center.
• This product may contain one or more chemicals known
to the State of California to cause cancer and birth defects
or other reproductive harm. Wash hands thoroughly after
handling.
• Failure to heed these warnings may result in serious or
fatal personal injury and/or property damage.
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY
RPMRPMRPM
WARNING

CAT300MP 3 revised 02/21/17
Operating Instructions • Warning Information • Parts Breakdown
WARRANTY
Cornwell warrants its air tools for a period of 1 year to the consumer. We will repair any air tool covered under this warranty which proves to be
defective in material or workmanship during the warranty period. In order to have your tool repaired, return the tool to any Cornwell Authorized
Warranty Center, freight prepaid. Please include a copy of your proof of purchase and a brief description of the problem. The tool will be inspected
and if any part or parts are found to be defective in material or workmanship, they will be repaired free of charge and the repaired tool will be
returned to you freight prepaid.
This warranty gives you specific rights. You may also have other rights which vary from state to state.
The foregoing obligation is Cornwell’s sole liability under this or any implied warranty and under no circumstances shall Cornwell be liable for any
incidental or consequential damages.
Note: Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not
apply to you.
OPERATION
Always turn off the air supply, drain hose of air pressure and detach
tool from air supply before installing, removing or adjusting any part or
accessory on this tool, or before performing any maintenance on this
tool.
After mounting a new hook & loop pad, start the Polisher under a bench
in order to make sure pad is firmly attached. Set the Polisher down on
the work evenly and move it slowly back and forth in wide, overlapping
areas. Additional pressure may be used to make more efficient use of
the tool. Lighter pressure may be used in delicate polishing or when
using edges of polishing bonnet. When finished polishing, lift it off work
before stopping the motor. To reduce exposure to polishing debris, work
in a well ventilated area with proper personal protection equipment.
NOTE: During operation, safety goggles should always be worn to
guard against flying debris (users and bystanders).
AIR SUPPLY
Tools operate on a wide range of air pressures. It is recommended that
air pressure measures 90 psig at the tool with the trigger fully depressed
and no load applied to the tool. Higher pressure (over 90 psig; 6.2 bar)
raises performance beyond the rated capacity of the tool, which will
shorten tool life and could cause injury.
Always use clean, dry air. Dust, corrosive fumes and/or water in the air
line will cause damage to the tool. Drain the water from air lines and
compressor prior to running tool. Clean the air inlet filter screen weekly.
The recommended hookup procedure can be viewed in FIG. 1.
The air inlet used for connecting air supply has standard 1/4" NPT. Line
pressure should be increased to compensate for unusually long air
hoses (over 25 feet). Minimum hose diameter should be 3/8" I.D. and
fittings should have the same inside dimensions and be tightly secured.
Ensure an accessible emergency shut off valve has been installed in the
air supply line and make others aware of its location.
LUBRICATION AND MAINTENANCE
Lubricate the air motor daily with high quality air tool oil. If no air line oiler
is used, run 1/2 oz. of oil through the tool. The oil can be squirted into the
tool air inlet or into the hose at the nearest connection to the air supply,
then run the tool. A rust inhibitive oil is acceptable for air tools.
WARNING:Afteranairtool hasbeenlubricated,oilwilldischargethrough
the exhaust port during the first few seconds of operation. The exhaust
port must be covered with a towel before applying air pressure to prevent
serious injury.
TROUBLESHOOTING
Other factors outside the tool may cause loss of power or erratic action.
Reduced compressor output, excessive drain on the air line, moisture
or restrictions in air pipes or the use of hose connections of improper
size or poor condition may reduce air supply. Grit or gum deposits in the
tool may cut power and may be corrected by cleaning the air strainer
and flushing out the tool with gum solvent oil or an equal mixture of
SAE #10 oil and kerosene. If outside conditions are in order, and the tool
continues erratic action or low power, disconnect tool from hose and
contact your nearest authorized service center.
FIG. 1
Drain Daily
RegulatorOilerQuick CouplerLeader
Hose
Nipple
Do Not Install
Quick Coupling
Here
Nipple
Filter
Air Supply
Whip Hose
Air Inlet
Trigger

CAT300MP 4 revised 02/21/17
PARTS BREAKDOWN - CAT300MP
Ref. # Item # DESCRIPTION QTY
1 * 3" Hook & Loop Pad 1
2 RS93502 Spacer 1
3 RS93503 Gear Housing 1
4 RS29120 Ball Bearing (6200ZZ) 2
5 RS93505 Spindle Shaft 1
6 RS93506 Idler Gear 3
7 RS93507 Internal Gear 1
10 RS30524 Ball Bearing (608ZZ) 1
11 RS93111 Front End Plate 1
12 RS305A22 Spindle Collar 1
13 RS93513 Rotor 1
14 RS70520 Rotor Blade 5
15 RS93115K1 Cylinder (includes #16) 1
16 RS26216 Steel Ball (3/32) (included w/#15) 1
17 RS93117 Rear End Plate 1
18 RS21114 Ball Bearing (626ZZ) 1
19 RS93119 Regulator 1
20 RS848012 O-Ring (12 x 2mm) 1
Ref # Item# DESCRIPTION QTY
21 RS93121W Housing 1
22 RS93122A Pin 1
23 RS93123A Trigger 1
24 RS93124 Exhaust Deflector 1
25 RS26212 O-Ring (9 x 2.6mm) (included w#26) 1
26 RS93126 Bushing (includes #25) 1
27 RS93127 Throttle Seat 1
28 RS93128 Throttle Valve 1
29 RS93129 Throttle Spring 1
30 RS93130 Air Inlet 1
31 RS93131W Comfort Grip 1
32 RS93532 Spanner Wrench (14mm) 1
not shown RS300MPLK Product Label Kit 1
Also available separately:
* CAT300M3VP 3" Hook & Loop Pad
CAT300MPPB 3-1/2" Polishing Bonnet 10 PK
CAT300MPWF 3" White Foam Compound Pad 10 PK
CAT300MPYF 3" Yellow Foam Compound Pad 10 PK