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CP8252 Series

Impact Wrench

Original Instructions

Copyright 2012, Chicago Pneumatic Tool Co. LLC

All rights reserved. Any unauthorized use or copying of 

the contents or part thereof is prohibited. This applies in 

particular to trademarks, model denominations, part numbers 

and drawings. Use only authorized parts. Any damage or 

malfunction caused by the use of unauthorized parts is not 

covered by Warranty or Product Liability.

MANUFACTURER’S LIMITED WARRANTY

Limited Warranty:  The “Products” of the Chicago Pneumatic Tool 

Co. LLC (“CP”) are warranted to be free from defects in material and 

workmanship for one year from the date of purchase.  This Warranty 

applies only to Products purchased new from CP or its authorized dealers.  

Of course, this Warranty does not apply to products which have been 

abused, misused, modified, or repaired by someone other than CP or its 

Authorized Service Representatives.  If a CP Product proves defective in 

material or workmanship within one year after purchase, return it to any 

CP Factory Service Center or Authorized Service Center for CP tools, 

transportation prepaid, enclosing your name and address, adequate 

proof of date of purchase, and a short description of the defect.  CP will, 

at its option, repair or replace defective Products free of charge.  Repairs 

or replacements are warranted as described above for the remainder of 

the original warranty period.  CP’s sole liability and your exclusive remedy 

under this Warranty is limited to repair or replacement of the defective 

Product. 

(There Are No Other Warranties Expressed Or Implied And 

CP Shall Not Be Liable For Incidental, Consequential, Or Special 

Damages, Or Any Other Damages, Costs Or Expenses Excepting 

Only The Cost Or Expense Of Repair Or Replacement As Described 

Above.)

 

English

EN

Noise & Vibration Declaration

Sound pressure level CP8252-P and CP8252-R: 94 dB(A), 

uncertainty 3 dB(A), in accordance with EN ISO 15744. For 

sound power, add 11 dB(A).

Vibration value:

CP8252-P and CP8252-R: 8.8 m/s², uncertainty k = 3.6, 

re. ISO 28927-2.

Declaration of noise and vibration emission

All values are current as of the date of this publication. For the 

latest information please visit cp.com.

These declared values were obtained by laboratory type 

testing in accordance with the stated standards and are 

suitable for comparison with the declared values of other 

tools tested in accordance with the same standards. These 

declared values are not adequate for use in risk assessments 

and values measured in individual work places may be higher. 

The actual exposure values and risk of harm experienced by 

an individual user are unique and depend upon the way the 

user works, the workpiece and the workstation design, as well 

upon the exposure time and the physical condition of the user.

We, Chicago Pneumatic, cannot be held liable for the 

consequences of using the declared values, instead of 

values reflecting the actual exposure, in an individual risk 

assessment in a work place situation over which we have no 

control. 

This tool may cause hand-arm vibration syndrome if its 

use is not adequately managed. An EU guide to managing 

hand-arm vibration can be found at www.pneurop.eu/uploads/

documents/pdf/PN3-02-NV_Declaration_info_sheet_0111.pdf 

We recommend a programme of health surveillance to 

detect early symptoms which may relate to noise or vibration 

exposure, so that management procedures can be modified to 

help prevent future impairment.

INSTRUCTION MANUAL

Machine Type:

This product is designed for installing and removing threaded 

fasteners in wood, metal and plastic. No other use permitted. 
For professional use only.

Air Supply Requirements

1.  Supply tool with 90 psig (6.2 bar) of clean, dry air. Higher 

pressure drastically reduces tool life.

2.  Connect tool to air line using pipe, hose and fitting sizes 

shown in the diagram below.

Lubrication

1.  Use an air line lubricator with SAE #10 oil, adjusted to 

two (2) drops per minute. If an air line lubricator cannot be 

used, add air motor oil to the inlet once a day.

2.  Use 0.25 oz. (7 g) of CP Pneu-Lube Synthetic Clutch 

Grease 8940158455.

Operation 

1.  The intended use of this impact wrench is with impact rated 

sockets operating upon threaded fasteners. To operate, 

pull trigger on handle. To operate in forward rotation, turn 

reverse valve toward forward arrow position. To operate in 

reverse, turn valve toward reverse arrow position.

2.  This impact wrench is equipped with a regulator to enable 

adjustment of output power. Turn the regulator lever to # 3 

for maximum power, to # 1 for minimum power.

Maintenance

1.  After first year, disassemble and inspect air motor and 

impacting clutch every three (3) months if the tool is used 

every day. Replace damaged or worn parts.

2.  High wear parts are underlined in the parts list.

3.  To keep downtime to a minimum, the following service kits 

are recommended:   

Tune-Up Kit:

 see part list 2050521483

Technical Data

Free speed; CP8252-P and CP8252-R: 9 000 RPM

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