Cornwell Tools CAT3125 User manual

1
CAT3125 / CAT3125G 06/12/18
Operating Instructions • Warning Information
• Parts Breakdown
CAT3125
CAT3125G
Super Duty 3/4" Dr.
Composite Impact Wrench
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
AVOID PROLONGED
EXPOSURE TO
VIBRATION
WARNING
WARNING
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.
Breakaway Torque............................................. 1,800 Ft/Lbs.
Working Torque Range .............................100 - 1,000 Ft/Lbs.
Maximum Applied Torque: ............................... 1,200 Ft./Lbs.
Free Speed: ........................................................... 6,000 RPM
Average Air Consumption:......................................... 6.9 cfm
Overall Length: ....................................................................8"
Weight: ........................................................................6.9 lbs.
Sound Level: ............................................................97.3 dBA
Air Inlet (NPT): ................................................................ 3/8"
Recommended Hose Size: .............................................. 1/2"
SPECIFICATIONS
Copyright © Professional Tool Products, 2018
All rights reserved

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CAT3125 / CAT3125G 06/12/18
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY.
WARNING
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 this air tool.
It is also the responsibility of the air tool 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 for replacements.
If the operator is not fluent in English, the product and
safety instructions shall be read to 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 protection when
operating or performing maintenance on this tool
(users and bystanders).
• Always wear hearing protection when using this tool
(users and bystanders). 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 on page 4.
• Air powered tools can vibrate during 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.
• 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.
• Note direction of rotation BEFORE operating tool.
• 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.
• Do not lubricate tools with flammable or volatile
liquids such as kerosene, diesel or jet fuel.
• This tool is not insulated against electric shock.
• This tool must not be used in explosive atmospheres.
• Servicing and repairs should only be made by an
authorized service center.
• Do not force tool beyond its rated capacity.
• Use accessories recommended by Cornwell Tools.
• Use only impact sockets and accessories on this tool.
Do not use hand sockets and accessories.
• Impact Wrenches are not torque control devices.
Fasteners with specific torque requirements must be
checked with suitable torque measuring devices
after installation with an impact wrench.
• Keep tool out of reach of children.
• Do not remove any labels. Replace any damaged labels.
• Failure to heed these warnings may result in serious or
fatal personal injury and/or property damage.
WARNING: This product can expose you to
chemicals including nickel, which is known to the
State of California to cause cancer and birth defects
or other reproductive harm. For more information
go to www.P65Warnings.ca.gov.

3
CAT3125 / CAT3125G 06/12/18
Drain Daily
RegulatorOilerQuick CouplerLeader
Hose
Nipple
Do Not Install
Quick Coupling
Here
Nipple
Filter
Air Supply
Whip Hose
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.
Alwaysuseclean,dryair.Dust,corrosivefumesand/orwaterintheairline
willcause damagetothetool.Drainwaterfromairlinesand compressor
prior to running tool. Clean the air inlet filter screen weekly. The
recommended hookup procedure can be viewed in the above figure.
The air inlet used for connecting air supply has standard 3/8" NPT.
Line pressure should be increased to compensate for unusually long
air hoses (over 25 feet). Minimum hose diameter should be 1/2" 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
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. The amount of oil to be used is 1 ounce.
Overfilling will cause a reduction in the power of the tool.
WARNING: After an air tool has been lubricated, oil will discharge
through 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.
OPERATION
The air regulator knob can be used to adjust torque to the
approximate tightness of a known fastener. To set the tool to desired
torque, select a nut or screw of known tightness of the same size,
thread pitch and thread condition as those on the job. Turn air
regulator knob to low position, apply wrench to nut and gradually
increase power (turn air regulator knob to admit more air) until
nut moves slightly in the direction it was originally set. The tool is
now set to duplicate that tightness - note air regulator knob setting
for future use. When tightening nuts not requiring critical torque
values, run nut up flush and then tighten an additional one-quarter
to one-half turn (slight additional turning is necessary if gaskets
are being clamped). For additional power needed on disassembly
work, turn air regulator knob to its fully open position. This impact
wrench is rated at 1" SAE bolt size. Rating must be down graded for
spring U bolts, tie bolts, long cap screws, double depth nuts, badly
rusted conditions and spring fasteners as they absorb much of the
impact power. When possible, clamp or wedge the bolt to prevent
springback.
Soak rusted nuts in penetrating oil and break rust seal before
removing with impact wrench. If nut does not start to move in three
to five seconds use a larger size impact wrench. Do not use impact
wrench beyond rated capacity as this will drastically reduce tool life.
The air regulator knob is also used to change the direction of the
tool. When the air regulator knob is turned to the right, the tool is
in a forward or right hand direction. When the air regulator knob
is turned to the left, the direction is reversed or left hand direction.
NOTE: Actual torque on a fastener is directly related to joint
hardness, tool speed, condition of socket and the time the tool is
allowed to impact.
Use the simplest possible tool-to-socket hook up. Every connection
absorbs energy and reduces power.
WARRANTY
Cornwell Quality Tools Company (“Cornwell”) warrants this product against defects in material and workmanship for a period of TWO (2) YEARS from the date of original retail purchase.
Subject to the conditions and limitations set forth below, Cornwell will, at its option, either repair or replace any part of the product(s) that proves defective by reason of improper
workmanship or materials.
This warranty does not cover any damage to this product that results from accident, abuse, misuse, natural or personal disaster, or any unauthorized disassembly, repair, or
modification. Repairs, disassembly and modification are only authorized to be made by Cornwell or a Cornwell Authorized Warranty Center.
WARRANTY SERVICE
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.
EXCLUSIONS AND LIMITATIONS
THIS WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND CONDITIONS, WHETHER ORAL OR WRITTEN,
EXPRESS OR IMPLIED. CORNWELL SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, TO THE EXTENT PERMITTED BY APPLICABLE LAW, ANY WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IF CORNWELL CANNOT LAWFULLY DISCLAIM IMPLIED WARRANTIES UNDER THIS LIMITED WARRANTY, ALL SUCH
IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY.
IN NO EVENT SHALL CORNWELL BE LIABLE TO THE PURCHASER OR TO THE USER OF A CORNWELL PRODUCT FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES BASED
UPON BREACH OF WARRANTY, BREACH OF CONTRACT, NEGLIGENCE, TORT, OR ANY OTHER LEGAL THEORY. SUCH DAMAGES INCLUDE, WITHOUT LIMITATION, EXPENSES, LOST
REVENUES, LOST SAVINGS, LOST PROFITS, OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM THE PURCHASE, USE OR INABILITY TO USE THE CORNWELL
PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential damages or exclusions or limitation on the duration of implied warranties or conditions, so the above
limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary by state.
Repair kits and replacement parts are available for many Cornwell products, regardless of whether or not the product is still covered by a warranty plan.
Cornwell Quality Tools Company
667 Seville Road • Wadsworth, OH 44281-1094

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CAT3125 / CAT3125G 06/12/18
ITEM PARTS NO PARTS NAME QTY
101 RS3125101 HAMMER CASE 1
102 RS1074103 HAMMER CASE BUSHING 1
103 RS76806 SOCKET RETAINER 1
104 RS76807 O - RING 1
105 RS3125105 ANVIL 1
106 RS3125106 HAMMER FRAME 1
107 RS3125107 HAMMER 2
108 RS3125108 HAMMER PIN 2
109 RS3125109 PACKING-HAMMER CASE 1
110 RS1837220 HAMMER CASE GREASE FITTING 1
111 RS4135112 SPRING PIN 1
201 RS3125201 HOUSING - BLUE 1
201 RS3125201G HOUSING - GREEN 1
202 RS3125202 HANDLE GRIP 1
203 RS3125203 HALF ROUND HD. STAR HEAD BOLT 4
204 RS3125204 HEX SOC.HD BOLT 1
301 RS1074301 BEARING (6003ZZ) 1
302 RS3125302 FRONT END PLATE 1
303 RS1074314 HEX SOC.HD BOLT 3
305 RS3125305 ROTOR BLADE 6
306 RS3125306 ROTOR 1
307 RS3125307 CYLINDER UNIT 1
308 RS3125308 REAR BEARING PLATE 1
309 RS227B25 BEARING (6001ZZ) 1
310 RS2215204 O - RING 1
311 RS3125311 WASHER 1
312 RS3125312 PACKING-CYLINDER
ITEM PARTS NO PARTS NAME QTY
401 RS3125401 TRIGGER A 1
402 RS3125402 SPRING PIN 1
403 RS3125403 TRIGGER BUSHING 1
404 RS3125404 SPRING 1
405 RS3125405 REGULATOR A 1
406 RS4135407 LEVER 1
407 RS3125407 REVERSE VALVE 1
408 RS1734416 STEEL BALL (3mm) 2
409 RS76721 SPRING 1
410 RS3125410 O - RING 1
411 RS3125411 REGULATOR B 1
412 RS1734414 O - RING 1
413 RS3125413 SPRING 1
414 RS3125414 TRIGGER TIP 1
415 RS1077413 SPRING PIN 1
418 RS76831 SEAL 1
419 RS76839 BUSHING 1
420 RS2234420 TIP VALVE 1
421 RS3125421 SPRING 1
422 RS1074410 O - RING 2
423 RS3125423 AIR INLET 1
424 RS3125424 SPRING PIN 1
426 RS1074408 DEFLECTOR 1
427 RS1735411 TAP BOLT 1
428 RS3125428 TRIGGER B 1
RSCAT3125PLK PRODUCT LABEL KIT FOR CAT3125 1
RSCAT3125GPLK PRODUCT LABEL KIT FOR CAT3125G 1
CAT3125 / CAT3125G PARTS BREAKDOWN