Craftsman 875.191190 Owner's Manual

Owner's Manual

PNEUMATIC

AIR HAMMER

Model No.

875.191190

WARNING:
Before operating tool, read this

manual and follow all

Safety Recommendations and
Operating Instructions.

• Safety

• Warranty

• Features & Operation

• Maintenance

• EspaSol

Sears, Roebuck and Co., Hoffman Estates, IL 60179 USA

www,sears,com

Read Operating Instructions
Please become familiar with all the instructions and

warnings before operating any pneumatic tool.
Always Wear Approved Eye Protection
Impact resistant eye protection should meet or exceed

the standards set forth in ANSI Z87.1, Occupational and
Educational Eye and Face Protection. Look for marking
Z87.1 on your eye protection to ensure that it is an
approved style.
Hearing Protection is Recommended

Hearing protection should be used when the noise level
exposure equals or exceeds an 8 hour time-weighted
average sound level of 85dBA. Process noise, reflective
surfaces, other tools being operated nearby, all add to the
noise level in a given work area. If you are unable to

determine your noise level exposure, we recommend the
use of hearing protection.
Avoid Prolonged Exposure to Vibration
Pneumatic tools can vibrate during use. Prolonged
exposure to vibration or very repetitive hand and arm

movements, can cause injury. Discontinue the use of any
tool if you experience tingling, numbness, discomfort or
pain in your hands or arms. You should consult your
physician before resuming use of tool.

90 PSI Maximum
This tool is designed to operate at an air pressure of 90

pounds per square inch gauge pressure (90 PSI)
maximum, at the tool. Use of higher air pressure can, and
may cause injury. Also, the use of higher air pressure
places the internal components under loads and

stresses they were not designed for, causing premature
tool failure.

NOTE: THE AIR SUPPLY SHOULD BE CLEAN AND DRY,
PREFERABLY LUBRICATED. FOR BEST RESULTS

DRAIN THE MOISTURE FROM YOUR COMPRESSOR
DAIL'_

Use May Produce Flying Objects
Care should be taken when using any percussion tool.

Keep the point of the chisel in contact with the work
surface. Inspect all accessories carefully for damage
before use. Chisels and chisel retainers should be kept
in good condition and replaced as needed. Discard any
accessory that has been damaged to prevent anyone
from using it.

Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities contains chemi-

cals known to cause cancer, birth defects or reproductive
harm. Some examples of these chemicals are:

Lead from lead-based paint
Cystalline silica from bricks, cement and other

masonry products
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 dust masks that
are specially designed to filter out microscopic particles.

FULL TWO YEAR WARRANTY ON

CRAFTSMAN AIR-DRIVE TOOLS

If this Craftsman tool fails to give complete satisfaction
within two years from the date of purchase, RETURN IT
TO THE NEAREST SEARS STORE IN THE UNITED

STATES, and Sears will repair it free of charge. If this
Craftsman tool is used for commercial or rental

purposes, this warranty applies for only 90 days from the
date of purchase. This warranty gives you specific legal

rights, and you may also have other rights which vary
from state to state.

Sears, Roebuck and Co., Dept. 817WA, Hoffman
Estates, lL 60179.

The Craftsman Model 875.191190 Air Hammer is
designed for chipping, trimming, riveting, cutting, piercing

and peening.

Features

Uses standard .401 inch shank chisels.

Alloy steel barrel and heat-treated piston for long life.
Produces 4,900 powerful blows per minute with

a 1-5/8" stroke.

Specifications

Blows per minute ............................................. 4,000

Stroke length .................................................... 15/8"

Bore diameter ................................................ 3/4"

Overall Length .................................................. 6.1"

Weight ........................................................ 2.3 lbs.

Recommended hose size ............................. 3/8" I.D.

Air Inlet ...................................................... 1/4" NPT

Average Air Consumption ............................... 4 CFM

Maximum Operating Pressure ......................... 90 psi

Pre-Operation

Before the tool is connected to the air supply, clear the air
hose of accumulated dust and moisture by running air
freely through the air hose for 5-10 seconds. Before
removing a tool for service or changing chisels, make

sure the air line is shut-off at the compressor. This will
prevent the tool from operating if the throttle is accidenfiy
engaged.

Installation (See figure 1)

This tool is designed to operate at 90 psi. Lower pres-
sure (below 90 psi) will reduce performance of the tool
while higher air pressure (over 90 psi) raises the perfor-

mance of the tool beyond its rated capacity and could
cause serious damage to tool and user.

Always use clean dry air. Excessive moisture and dirt will
greatly reduce the life of any air motor. We recommend
the installation of an in-line filter-regulator-lubricator as
close to the tool as possible. (Fig 1)

A 3/8" air hose is required up to a length of 8 ft. If more
length is required a 1/2" air hose should be used at the

compressor. Attach a 3/8" whip hose for the remaining 4 -
8 ft. for flexibility. Be sure all hoses and fittings are the
correct size and tightly secured before using air tool.

(2)

More than 1/100 slope _ _1

_Branch line = 2 times[_ j

Stop Regulator
Valve Lubricator

I Tool inlet_os_

i_ jAute Drain

I_ Valve

Figure 1* Air Hose Hook Up

USING QUICK CHANGE RETAINER

1. Disconnect air supply and remove all accessories.

2. Thread quick change chisel retainer onto end of
barrel.

3. While pushing end of spring to side of the tool, insert

a standard .401" taper shank chisel into barrel and
allow spring tension to rest against chisel. Make sure
chisel collar is between barrel and retaining part of
spring.

4. Remove chisel by pushing spring to side of tool and
pull chisel out of barrel.

5. Always hold chisel to work surface before operating

tool.

Spring R_tainer

Filter I

Air Tool

Tool inlet/hose size

Stop I
Valve

K%

Air

L Compressor J

..\ ..\\..............t....,

Lubrication

An in-line tilter-regulator-lubricator (fig 1) is
recommended as it increases tool life and keeps the
tool in sustained operation. The in-line lubricator should
be regularly checked and filled with air tool oil Proper
adjustment of the in-line lubricator is performed by
placing a sheet of paper next to the tools exhaust
ports and holding the throttle open approximately 30
seconds. The lubricator is properly set when a light
stain of oil collects on the paper. Excessive amounts of

oil should beavoided.

In the event that it becomes necessary to store the
tool for an extended period of time (overnight, weekend,
etc.), it should receive a generous amount of
lubrication through the air inlet (fig 2). The tool should
be run for approximately 30 seconds to ensure oil has
been evenly distributed throughout the tool. The tool
should be stored in a clean and dry environment.

Main line = 3times

Trigger lever

_ Regulator

Figure2- Tool Diagram

Place chisel against work surface and pull trigger in
short bursts until chisel sets in work. Use both hands to

hold hammer for better control.

Sears offers a variety of chisels for this hammer.

Air inlet

Recommended lubricants: Use air tool oil or any
other high grade turbine oil containing moisture
absorbent, rust inhibitors, metal wetting agents and an
EP (extreme pressure) additive. (See Fig. 2 for
location/air inlet).

I,ACAUTION]

Never operate hammer without a chisel installed and
placed against the work surface. Doing so may result in
personal injury or damage to the tool.

(3)