Cornwell Tools CAT3250AHMV User manual

CAT3250AHMV 1 03/23/09
Blows per minute ..................2,000
Shank Opening .................. 0.401"
Bore Diameter ......................3/4"
Stroke............................3-1/2"
Minimum Hose Size ..............3/8" I.D.
Air Inlet .....................1/4"- 18NPT
Air Pressure .......................90 PSI
Average Air Consumption ........2.77 CFM
Weight ...........................4.3Lbs
Length ..........................10-1/2"
SPECIFICATIONS
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.
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION
CAT3250AHMV
Super Duty,
Air Hammer w/
Vibration Reduction
• Operating Instructions • Warning Information
• Parts Breakdown
Copyright © Professional Tool Products, 2009
All rights reserved.

CAT3250AHMV Super Duty Air Hammer w/ Vibration Reduction
CAT3250AHMV 2 03/23/09
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY
This Instruction Manual Contains Important Safety
Information.
Read THIS INSTRUCTION MaNUaL
CaRefULLy aNd UNdeRSTaNd aLL
INfORMaTION BefORe OpeRaTINg
THIS TOOL.
• 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 and face
protection when operating or performing
maintenance on this tool. 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.
• Keep the tool in efficient operating condition.
• Operators and maintenance personnel must be
physically able to handle the bulk, weight and
power of this tool.
• 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.
• 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.
• Place the tool on the work before starting the
tool. Do not point or indulge in any horseplay with
this tool.
• 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.
• Never use a chisel as a handstruck tool. They
are designed and heat treated to be used only
in air hammers. Select the correct shank and
retainer for the tool.
• Never use dull accessories. Never cool a hot
accessory in water as brittleness and early failure
can result. Accessory breakage or tool damage
may result from prying.
Take smaller bites to avoid getting stuck.
• 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 any
damaged labels.
• Use accessories recommended by Cornwell
Tools.

CAT3250AHMV Super Duty Air Hammer w/ Vibration Reduction
CAT3250AHMV 3 03/23/09
Nipple
AIR SUPPLY
Tools of this class operate on a wide range of air pres-
sures. It is recommended that air pres sure of these
tools measures 90 PSI at the tool while running free.
Higher pres sure (over 90 psig; 6.2 bar) raises perfor-
mance beyond the rated capacity of the tool which
will short en the tool’s life be cause of faster wear 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 air tank daily. Clean the air inlet filter
screen on at least a weekly schedule. The rec om mend-
ed hookup pro ce dure can be viewed in the above
figure.
The air inlet used for con nect ing air supply, has
stan dard 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 di men sions and
be tightly secured.
OPERATION
Always place a chisel in the hammer and hold the
tool down to the work before operating. Damage to
the tool or the retainer may result if this precaution
is not followed.
The chisel retainers are not designed for complete
safety against accidental release of cutters or ham-
mers. To avoid injury, the throttle must never be
depressed unless the chisel is held firmly against the
work place. When tool is not in actual use, the chisel
must be removed. During operation, safety goggles
should always be used to guard against flying rust
and chips. When using tool, regulate the speed so
that the chisel is not being driven out of the cylinder.
If piston is allowed to strike the cylinder wall, inter-
nal damage will result.
To change chisel, pull back on spring hook and insert
chisel. Release spring hook.
To regulate air, turn air regulator knob out for maxi-
mum air pressure and in for minimum.
LUBRICATION
Lubricate the air motor daily with quality air tool
oil. If no air line oiler is used, run 1/2 ounce of oil
through the tool. The oil can be squirted into the
tool air inlet or into the hose at the nearest connec-
tion to the air supply, then run the tool.
Overfilling will cause a reduction in the power of the
tool.
WARRANTY
Cornwell warrants this air tool for a period of 2 years 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.

CAT3250AHMV Super Duty Air Hammer w/ Vibration Reduction
CAT3250AHMV 4 03/23/09
401
305
304
303
306
302
301
202
101
201
203
208
209
210
211
212
213
214
204
206
205
207
102
103
Ref. # Item # DESCRIPTION QTY
101 RS3250101 Housing 1
102 RS1719102 O-Ring 1
103 RS1719103 Magazine 1
201 RS3190201 Trigger 1
202 RS1719202 Spring Pin 1
203 RS1719203 Muffler 1
204 RS1719204 Retaining Ring 1
205 RS1719205 O-Ring 1
206 RS1719206 Inlet Bushing 1
207 RS1719207 Swivel Air Inlet 1
208 RS1735402 O-Ring 1
209 RS1735401 Insert Bushing 1
210 RS1735403 Seal 1
Ref. # Item # DESCRIPTION QTY
211 RS1735404 Bushing 1
212 RS1735405 Tip Valve 1
213 RS76640 Valve Spring 1
214 RS1719214 Deflector 1
301 RS1719301 O-Ring 1
302 RS1719302 Rear Cushion 1
303 RS181112 Metal Valve Unit 1
304 RS1719304 Main Piston 1
305 RS1719305 Cylinder 1
306 RS1719306 Dust Cover 1
401 CCR130 Quick Change Retainer 1