Craftsman 9-19905 - 1/2dr 1/4npt 500ft/lb Sq Dr Impact... Bedienungsanleitung

Owner's Manual

CRAFTSMIIN"

1/2" Drive Ultra-Duty

PISTOL GRIP IMPACT WRENCH

Model No.

235.199050

•Safety

° Operation

°Maintenance

°Service and

Adjustments

=Parts List

•Espa_oi

_WARNING:

Before using this Impact Wrench

read this manual and follow all its

Safety and Operating Instructions.

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

Owner'= M=nual P7360 (1-98) Printed In USA

TABLE OF CONTENTS

Two Year Warranty

Safety

Warning Labels

Notice, Warning and Caution

Placing Tool In Service

Using the Tool

Operation

Air Supplyand Connections

Using the Power Management System

Specifications

Maintenance

Lubrication

Service and Adjustment

Disassembly

Assembly

Troubleshooting

Parts List

Exploded Drawing

Parts for Ordering

PAGE

3-5

6-7

8-15

17-19

EspaSol 20-37

FULL TWO YEAR WARRANTY

If this product fails due to a defect in material or workmanship within

two years from the date of purchase, Sears will at its option, repair or

replace it free of charge.

Return this product to a Sears Service Center for repair,or to place of

purchase for replacement.

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, IL 60179

,_WARNING

Always wear eye

protection when op-

erating or perform-

ing maintenance on

this tool.

_WARNING

Always wear hear-

ing protection

when operating

this tool.

_._l_gl_ Do not use dam- Operate at 90 psig

aged, frayed or (6.2 bar/620 kPa)

deteriorated air Maximum air

hoses and fittings, i pressure.

Keep body stance Do not carry the

balanced and firm. tool by the hose.

Do not overreach

when operating this

tool.

,_WARNING

Always turn off the air supply

and disconnect the air supply

hose before installing, re-

moving or adjusting any ac-

cessory on this tool, or before

performing any maintenance

on this tool.

,_WARNING

Air powered tools can vibrate

in use. Vibration, repetitive

motions or uncomfortable

positions may be harmful to

your hands and arms. Stop

using any tool if discomfort,

tingling feeling or pain occurs.

Seek medical advice before

resuming use.

_WARNING is used to indicate the presence of a hazard which

can cause severe personal Injury or death if thewarning Is Ignored.

CAUTION is used to indicate the presence of a hazard which will

or can cause minor personal injury or property damage if the cau-

tion is Ignored.

NOTICE is used to notify people of installation, operation or main-

tenance information which is important but not hazard related.

This Craftsman Impact Wrench is

designed for use in general auto-

motive repair, tire service and

heavy duty fleet applications.

,_WARNING:

Important safety information en-

closed.

Read this manual before operating

tool.

It is the responsibility of an em-

ployer to place the information in

this manual into the hands of any-

one who operates this device.

Failure to observe the following

warnings could result in injury.

PLACING TOOL IN SERVICE

• Always operate, inspect and

maintain this tool in accordance

with all regulations (local, state,

federal and country), that may

apply to hand-held/hand-oper-

ated pneumatic tools.

•For safety, top performance,

and maximum durability of

parts, operate this toolat

90 psig (6.2 bar/620 kPa) maxi-

mum air pressure at the inlet

with 3/8" (10 mm) inside diame-

ter air supply hose.

° Always turn offthe air supply

and disconnect the air supply

hose before installing, removing

or adjusting any accessory on

this tool, or before performing

any maintenance on this tool.

•Do not use damaged, frayed or

deteriorated airhoses and fit-

tings.

° Be sure allhoses and fittings

are the correct size and are

tightly secured. See Figure 1 for

a typical piping arrangement.

°Always use clean, dry air at

90 psig maximum air pressure.

Dust, corrosive fumes and/or

excessive moisture can ruin the

motor of an air tool.

°Do not lubricate tools with flamo

mable or volatile liquids such as

kerosene, diesel or jet fuel.

PLACING TOOL IN SERVICE

(continued)

•Do not removeany labels. Re-

place any damagedlabel.

• The use ofa hosewhip is rec-

ommended. A couplercon-

nected directlyto the air inletin-

creases toolbulkand de-

creases toolmaneuverability.

•For maximum performance, the

coupler on thewallshould be

the next size largerthan the

coupler usedon the tool.The

coupler closesttothe tool

should notbe lessthan the

proper air supplyhose size.

USING THE TOOL

•Always wear eye protection

when operatingor performing

maintenance on this tool.

• Always wear hearing protection

when operating this tool.

•Keep hands, loose clothing and

long hair away from rotating

end of tool.

•Note the position of the revers-

ing lever before operating the

tool so as to be aware of the

direction of rotation when oper-

ating the throttle.

•Anticipate and be alert for sud-

den changes in motion during

start-up and operation of any

power tool.

•Keep body stance balanced

and firm. Do not overreach

when operating this tool. High

reaction torques can occurat or

below the recommended air

pressure.

•Tool shaft may continue to ro-

tate briefly after throttle is re-

leased.

•Air powered tools can vibrate in

use. Vibration, repetitive mo-

tions or uncomfortable positions

may be harmful to your hands

and arms. Stop using any tool ff

discomfort, tingling feeling or

pain occurs. Seek medical ad-

vice before resuming use.

• Use accessories recommended

by Craftsman.

•Use only impact sockets and

accessories. Do not use hand

(chrome) sockets or accesso-

ries.

• Impact wrenches are not torque

wrenches. Connections requir-

ing specific torque must be

checked with a torque meter af-

ter fitting with an impact

wrench.

• This tool is not designed for

working in explosive atmo-

spheres.

° This tool is not insulated against

electric shock.

NOTICE: The use of other than

genuine Craftsman replacement

parts may result in safety hazards,

decreased tool performance, in-

creased maintenance, and may

invalidate all warranties.

Repairs should be made only by

authorized trained personnel.

Air Supply and Connections

Always use clean dry air.Dust,

corrosivefumes and/or excessive

moisture can ruin the motor of an

air tool. An air line filter can greatly

increasethe life of anair tool. The

filterremoves dustand moisture.

Besure all hoses and fittingsare

the correctsize and are tightlyse-

cured.See Figure1 for a typical

pipingarrangement.

Main lines 3 timesair toolinletsize.

Toairtool

Lubri

Branch line 2 times air -_ I [_ _1 I

toolinletsize _,,//_/-.-,- ,t =

Drainregulady_Compressor_

Figure 1

USING THE POWER MANAGEMENT SYSTEM

,_WARNING:

Airwrenches are nottorquecon-

trotdevices. Fastenerswith specif-

ictorquerequirementsmustbe

checked with suitabletorque mea-

suringdevices afterinstallation

with an air wrench.

MODEL 19905 POWER MANAGEMENT SYSTEM

Power settingindicators

Minimum Maximum

Power management dial

Figure2

YourImpactWrench incorporates

a Power Management System that

allows you to select four power

output settings. These settings

range from minimum power output

through maximum power output in

the forward direction only. The Air

Wrench will always operate at

maximum power output in the re-

verse direction, no matter what

power output level is selected.

AWARNING:

The fourpowersettingindicators

of increasingsize on the rear of

the housing are for reference only

and DO NOT denote a specific

power output. The smallest power

setting indicator designates mini-

mum power output, the two middle

power setting indicators denote

medium power outputs and the

largest power setting indicator de-

notes maximum power output.

The power output can be further

reduced in forward or reverse by

using the variable throttle. Air sup-

ply systems which do not deliver

adequate air pressure can affect

power output at all settings.

SPECIFICATIONS

Model Type of Drive Impacts

Handle per min.

19905 pistol 1/2'" 1,250

grip

LUBRICATION

Recomm'ended

Torque Range

Forward

ft.lb

50-400

(450 max.)

Forward

Newton

meter (Nm)

68-542

(610 max.)

Reverse

ft-lb

55O

(600 max.)

Reverse

Newton

meter (Nm)

746

(813 max,)

Use Craftsman No. 18830

Pneumatic Tool Care Kit or a good

quality SAE 20 or 20W motor oil.

Craftsman 18830 Oil

Craftsman 18830 Grease

for routine external lubrica-

tion of the impact mecha-

nism through the Hammer

Case Grease Fitting.

Always use an air line lubricator

with these tools.

CAUTION: Donot mark any

nonmetallic surface on this tool

with customer identification codes.

Such actions could affect tool per-

formance.

DISASSEMBLY

NOTICE: Numbers in paren-

theses in the following instruc-

tons are part illustration num-

bers found on pages 17-19.

General Instructions

1. Do not disassemble the tool any

further than necessary to re-

place or repair damaged parts.

2. Whenever grasping a tool or

part in a vise, always use lea-

ther-covered vise jaws to pro-

tect the surface of the part and

help prevent distortion. This is

particularly true of threaded

members and housings.

NOTICE: Always use lea-

ther-covered vise jaws when

clamping the handle in a vise.

Leather will conform to the

shape of the handle and allow

the tool to be held securely. To

prevent damage to the exhaust

diffuser, never clamp only the

bottom of the handle.

3. Do not disassemble the tool

unless you have a complete set

of new gaskets and O-rings for

replacement.

Disassembly of the Impact

Wrench

1. Clamp the handle of the impact

wrench in a vise with leather-

covered jaws withthe square

driver positioned horizontally.

NOTICE: Avoid excessive

clamping pressure which can

damage the Housing and can

cause difficulty when removing

the parts.

2. Unscrew and remove the four

Hammer Case Screws (11).

3. While lightly tapping on the end

of the Anvil (8) with a plastic

hammer, lift off the Hammer

Case (15) and Hammer Case

Gasket (18).

NOTICE: The Front End Plate

(2) might come off during the

removal of the Hammer Case.

Make sure that itdoes not drop

on the floor or strike a hard or

metallic surface since it might

be damaged.

4. Grasp the Hammer Frame (12)

and carefully lift off the entire

impact mechanism, making cer-

tain not to drop the two Ham-

mer Pins (13).

Disassembly of the Impact

Mechanism

1. Set the mechanism, driver end

up, on the workbench.

NOTICE: Note the twin ham-

mers within the Hammer

Frame. These are identical, but

must be placed in the Hammer

Frame in a certain relationship.

Using a felt-tipped pen, mark

the top "Tt" hammer and the

bottom hammer "Bt" with the

arrows pointing upward. Mark

both Hammers on the same

end.

2. With the mechanism sitting up-

right on the workbench, slowly

rotate the Anvil in a clockwise

direction until itcomes up solid.

NOTICE: If you continueto ro-

tate the Anvil, it will cam the

Hammers out of engagement.

Don't do this; merely rotate the

Anvil until itcomes up solid.

3. Hold the Hammer Frame firmly

and without disturbing the ham-

mers, gently lift the Anvil while

simultaneously rotating it clock-

wise about 1/8 of a turn from

the Hammer Frame.

4. With the Anvil removed, lift out

the two Hammer Pins. The twin

hammers are now free to slide

from the Hammer Frame, Be

careful do not to drop them.

Disassembly of the Motor

NOTICE: When pulling, disas-

sembling or assemblingthe mo-

tor, we recommendreplace-

ment of the MotorGasket (7).

1. Remove the MotorAssembly

from the Housing(19) bypush-

ingon Power Management Dial

(41) from the backofthe

Housing. See Figure3.

Figure 3

NOTICE; If the Motor Assem-

bly cannot be removed from the

Housing by pushing, tap the

Power Management Dial lightly

until the Motor Assembly is free.

2. Remove the Power Manage-

ment Dial from the rear of the

Cylinder (1). Remove the Power

Management Dial Seal (42) if it

needs to be replaced.

3. Remove the Front End Plate (2)

from the Cylinder by tapping the

splined end of the Rotor (5) with

a plastic hammer. If the Front

End Plate does not come loose,

secure a center punchin a vise

with the point angled downward

and outward from the vise.

Then, grasp the Cylinder and

Front End Plate in one hand

and position the hole in the end

of the Rotor against the punch.

NOTICE: Be careful not to

drop the Cylinder since it can

be damaged by hitting a hard

surface.

Using the other hand, tap the

punch with a hammer while

pressing the Rotor against the

punch. After a few taps, the

Front End Plate will slide off of

the Cylinder.

NOTICE: To prevent damage

to the Cylinder, do not tap or

strike Cylinder on a hard or me-

tallic surface when removing

the Rotor Bearings (3).

To remove the Front Rotor

Bearing, hold the Front End

Plate with Front Rotor Bearing

down and tap the Front End

Plate on a flat, nonmetallic

surface such as a work bench.

This will loosen the Front Rotor

Bearing so that it will drop out of

the Front End Plate. See

Figure 4.

Front end plate

Front rotor bearing

Bench with nonmetallic surface

Figure 4

5. Remove the Rear Rotor Bear-

ingRetainer(6) from therear of

the Rotor (5). The Rotor can

now be removed from the Cylino

der. Remove the Vanes (4) from

the Rotor if they need to be re-

placed.

_ Cylinder

Rear rotor bearing

Bench with nonmetallic surface

Figure 5

6. To remove the Rear Rotor Bear-

ing, hold the Cylinder with the

Rear Rotor Bearing down and

tap the Cylinder on a flat, non-

metallic surface such as a work

bench. This will loosen the Rear

Rotor Bearing so that it will drop

out of the Cylinder. See Figure

7. Working from the rear of the

Housing, push out the Motor

Gasket (7).

NOTICE: When removing the

Motor Gasket, do not use a

screwdriver or any other sharp

object which could damage the

Gasket and/or Housing.

Disassembly of the Throttle

Mechanism

NOTICE: For ease of disas-

sembly, we recommend using

the inlet Clip Removal Tool (43).

See Figure 6.

2. Pull theTrigger (33) from the

front of the Housing and re-

move the Trigger O-ring (34).

SIotfortab

Tab on inlet retainer

clip (both sides)

Figure 7

3. With the Inlet Bushing stillinthe

vise, remove the Tilt Valve Seat

Retainer (31) and Tilt Valve

Seat Support (30). Use a

hooked tool with no sharp

edges to remove the Tilt Valve

Seat (29) from the Inlet Bush-

ing. See Figure 8.

Hooked tool

Tilt valve stem

Left-hand

button

Inlet bushing

Inlet clip removal assembly

tool Figure 6

1. Secure the Inlet Bushing in a

vise. Press in both tabs of the

Inlet Retainer Clip (32) and pull

upward on the Housing (19).

This will allow the Inlet Bushing

to comefree from the Handle of

the Housing. See Figure 7.

5°

Figure 8

Remove theTilt Valve (28) and

-lilt Valve Spring (27) if dam-

aged.

Remove the inlet Bushing Seal

(26) and Inlet Retainer Clip (32)

if damaged. Remove Washer

(25).

NOTICE: Do not remove the

Inlet Bushing Screen (23) from

the Inlet Bushing unless it is

damaged. Cleanthe Inlet Bush-

ing Screen by using a suitable

cleaning solution in a well venti-

lated area.

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