Craftsman 919.165180 Bedienungsanleitung

Owner's Manual

Permanently Lubricated

Single Stage

Horizontal Portable

AIR COMPRESSOR

Model No.

919.165180

•Safety Guidelines

•Assembly

•Operation

•Maintenance

•Service and Adjustments

•Troubleshooting

•Repair Parts

•Espa_ol

CAUTION: Read the Safety Guidelines

and All Instructions Carefully Before

Operating,

Sears, Roebuck and Co., Hoffman Estates, IL 60170 U.S.A.

Visit our Craftsmen website: www.sears.€om/¢raftsman

D245_0 Rsv. 0 19/11/01

WARRANTY ............................................. 2

SPECIFICATION CHART .................................... 3

SAFETY GUIDELINES .................................... 3-8

GLOSSARY .............................................. 9

ACCESSORIES .......................................... 9

DUTY CYCLE ......... ................................... 9

ASSEMBLY ............................................. 10

INSTALLATION 11-12

•,. ° , . •,•. . _ ,. = ............. . °, . . .... ,° .

OPERATION .......................................... 13-15

MAINTENANCE ....................................... 16-17

SERVICE AND ADJUSTMENTS ........................... 18-19

STORAGE .............................................. 20

TROUBLESHOOTING GUIDE ............................ 21-23

REPAIR PARTS ....................................... 24-27

ESPAI_IOL ............................................ 28-49

HOW TO ORDER REPAIR PARTS ..................... back cover

FULL ONE YEAR WARRANTY AIR COMPRESSOR

If this air compressor fails due to adefect in material or workmanship within

one year from the date of purchase, RETURN IT TO THE NEAREST SEARS

REPAIR CENTER THROUGHOUT THE UNITED STATES AND SEARS WILL

REPAIR IT, FREE OF CHARGE. If purchased from Orchard Supply Hardware,

return to the nearest Orchard Store and Orchard will repair it, free of charge.

If this air compressor is used for commercial or rental purposes, the warranty

will apply for ninety days from the date of purchase•

This warranty gives you specific legal rights and you may have other rights

which vary from state to state,

Sears, Robebuck and Co., Dept. 817WA, Hoffman Estates, II 60179

D24580 2-ENG

Model No. 919-165180

Max. Developed HP 5.5

Bore 2.38"

Stroke 1.35"

Voltage-Single Phase 120

Minimum Branch Circuit Requirement 15 amps

Fuse Type Time Delay

Air Tank Capacity 25 gallons

Approximate Cut-in Pressure 110

Approximate Cut-out Pressure 135

SCFM @ 40 psig 8.4

SCFM @ 90 psig 6.2

Refer to Glossary for abbreviations,

This manual contains information that is important for you to know and understand_This information

relates to protecting YOUR S&FETY and PREVENTING EQUIPMENT PROBLEM8. To help you

recognize this information, we use the symbols below. Please read the manual and pay attention to

these sections.

_ Indicates an

imminently haZardous

situation which, if not avoided, will

result in _ath or serious injury,

I_l_Jllndicates a potentially

hazardous situation

which, if not avoided, _ result in

death or serious iniurv.

Indicates a potentially

hazardous situation

which, if not avoided, may result in

mirror or moderate iojury.

indicates a potentially hazardous

situation which, if not avoided, may

result in Dt_oertv damage.

_Some dust cn_ted by power sanding, sawing, grinding, drilling, and other

construction activities contains chemicals known (to the St_e of California)to

cause cancer, birth defects or other reproductive harm, Some example of these chemicals are:

•lead from lead-based paints

•crystal!Ine silica from bdcks and cement and other masonry products

•arsenic end chromium from chemically-treated lumber

Your Hskfrom these exposures vades, 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, always wear MSHAJNIOeH approved, prepedy fitting face mask or respirator when using

such tools.

When using air tools, basic safety precautions should always be followed to reduce the dsk of of

personal injury.

3-ENG D24580

SAVE THESEINSTRUCTIONS

IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN

SERIOUS INJURY AND PROPERTY DAMAGE_ READ AND UNDERSTAND ALL

WARNINGS AND OPERATING INSTRUCTIONS BEFORE USING THIS EQUIPMENT

I: Y-'_'_F-'_I_

WARNING: RISK OF EXPLOSION OR FIRE

WHAT CAN HAPPEN

IT IS NORMAL FOR ELECTRICAL CONTACTS

WITHIN THE MOTOR AND PRESSURE SWITCH

TO SPARK.

IF ELECTRICAL SPARKS FROM

COMPRESSOR COME INTO CONTACT WITH

FLAMMABLE VAPORS, THEY MAY IGNITE.

CAUSING FIRE OR EXPLOSION.

H_U'I RICTING ANY OF THE COMPRESSOR

VENTILATION OPENINGS WILL CAUSE

SERIOUS OVERHEATING AND COULD CAUSE

FIRE.

UNATTENDED OPERATION OF THIS

PRODUCT COULD RESULT IN PERSONAL

INJURY OR PROPERTY DAMAGE, TO

REDUCE THE RISK OF FIRE, DO NOT ALLOW

THE COMPRESSOR TO OPERATE

UNATTENDED.

HOW TO PREVENT IT

ALWAYS OPERATE THE COMPRESSOR IN A

WELL VENTILATED AREA FREE OF

COMBUSTIBLE MATERIALS, GASOLINE OR

SOLVENT VAPORS.

IF SPRAYING FLAMMABLE MATERIALS,

LOCATE COMPRESSOR AT LEAST 20 FEET

AWAY FROM SPRAY AREA. AN ADDmONAL

LENGTH OF HOSE MAY BE REQUIRED.

STORE FLAMMABLE MATERIALS IN A

SECURE LOCATION AWAY FROM

COMPRESSOR.

NEVER PLACE OBJECTS AGAINST OR ON

TOP OF COMPRESSOR. OPERATE

COMPRESSOR IN AN OPEN AREA AT LEAST

12 INCHES AWAY FROM ANY WALL OR

OBSTRUCTION THAT WOULD RESTRICT THE

FLOW OF FRESH AIR TO THE VENTILATION

OPENINGS.

OPERATE COMPRESSOR IN A CLEAN, DRY.

WELL VENTfLATEDAREA. DO NOT OPERATE

UNIT INDOORS OR IN ANY CONFINED AREA.

ALWAYS REMAIN IN ATTENDJU_CE WITH THE

PRODUCT WHEN IT IS OPERATING.

ALWAYS DISCONNECT ELECI_IICAL POWER

BY MOVING PRESSURE SWITCH LEVER TO

THE OFF POSITION AND DRAIN TANK DALLY

OR AFTER EACH USE.

024580 4- ENG

WARNING: RISK OF BURSTING [_1

THE FOLLOWING CONDITIONS COULD LEAD TO A WEAKENING OF THE

TANK, AND RESULT IN A VIOLENT TANK EXPLOSION AND COULD CAUSE

PROPERTY DAMAGE OR SERIOUS INJURY.

WHAT CAN HAPPEN

1. FAILURE TO PROPERLY DRAIN

CONDENSED WATER FROM THE

TANK, CAUSING RUST AND THINNING

OF THE STEEL TANK.

2. MODIFICATIONS OR ATTEMPTED

REPAIRS TO THE TANK.

3. UNAUTHORIZED MODIFICATIONS TO

THE UNLOADER VALVE, SAFETY

VALVEj OR ANY OTHER COMPONENTS

WHICH CONTROL TANK PRESSURE,

4. EXCESSIVE VIBRATION CAN WEAKEN

THE AIR TANK AND CAUSE RUPTURE

OR EXPLOSION.

ATTACHMENT_ &ACCESSORIES:

EXCEEDING THE PRESSURE RATING OF AIR

TOOLS, SPRAY GUNS, AIR OPERATED

ACCESSORIES, TIRES AND OTHER

INFLATABLES CAN CAUSE THEM TO

EXPLODE OR FLYAPART, AND COULD

RESULT IN SERIOUS INJURY.

HOW TO,,PREVENT IT

DRAIN TANK DAILY OR AFTER EACH USE. JF

TANK DEVELOPS A LEAK, REPLACE iT

IMMEDIATELY WITH A NEW TANK OR REPLACE

THE ENTIRE COMPRESSOR.

NEVER DRILL INTO, WELD, OR MAKE ANY

MODIFICATIONS TO THE TANK OR ITs

A'I'TACHMF_J'4TS.

THE TANK IS DESIGNED TO WITHSTAND

SPECIFIC OPERATING PRESSURES. NEVER

MAKE ADJUSTMENTS OR PARTS

SUBSTITUTIONS TO ALTER THE FACTORY

SET OPERATING PRESSURES.

FOR ESSENTIAL CONTROL OF A{R

PRESSURE,YOU MUST INSTALL A PRESSURE

REGULATOR AND PRESSURE GAUGE TO

THE AiR OUTLET (IF NOT EQUIPPED) OF

YOUR COMPRESSOR. FOLLOW THE

EQUrPMENT MANUFACTURERS

RECOMMENDATION AND NEVER EXCEED THE

MAXIMUM ALLOWABLE PRESSURE RATING OF

ATTACHMENTS. NEVER USE COMPRESSOR

TO INFLATE SMALL LOW-PRESSURE

OBJECTS SUCH AS CHILDREN'S TOYS,

FOOTBALLSj BASKETBALLS, ETC,

WARNING: RISK FROM FLYING OBJECTS

WHAT CAN HAPPEN

THE COMPRESSED AIR STREAM CAN

CAUSE SOFT TISSUE DAMAGE TO EXPOSED

SKIN AND CAN PROPEL DIRT, CHIPS, LOOSE

PARTICLES AND SMALL OBJECTS AT HIGH

SPEED, RESULTING IN PROPER'W DAMAGE

OR PERSONAL INJURY,

,J,,i

HO W TO PREVENT,IT

ALWAYSWEAR ANSI Z87.1 APPROVED

SAFETY GLASSES WITH SIDE SHIELDs WHEN

USING THE COMPRESSOR.

NEVER POINT ANY NOZZLE OR SPRAYER

TOWARD ANY PARTOF THE BODY OR AT

OTHER PEOPLE OR ANIMALS,

ALWAYS TURN THE COMPRESSOR OFF AND

BLEED PRESSURE FROM THE AIR HOSE AND

TANK BEFORE ATI--/=MPTINGMAINTENANCE,

ATrACHING TOOLS OR ACCESSORIES.

5-ENG 024580

WARNING: RISK OF ELECTRICAL SHOCK

WHAT CAN HAPPEN

YOUR AIR COMPRESSOR 16 POWERED BY

ELECTRICITY. LIKE ANY OTHER

ELECTRICALLY POWERED DEVICE, IF IT IS

NOT USED PROPERLY IT MAY CAUSE

ELECTRIC SHOCK.

REPAIRS ATTEMPTED BY UNQUALIFIED

PERSONNEL CAN RESULT IN SERIOUS

INJURY OR DEATH BY ELECTROCUTION.

ELECTRICAL GROUNDING: FAILURE TO

PROVIDE ADEOUATI_ GROUNDING TO THIS

PRODUCT COULD RESULT IN SERIOUS

INJURY OR DEATH FROM ELECTROCUTION.

SEE GROUNDING INSTRUCTIONS,

H,OW TO PREVENT IT

NEVER OPERATE THE COMPRESSOR

OUTDOORS WHEN iT IS RAINING OR IN WET

CONDITIONS.

NEVER OPERATE COMPRESSOR WI'(H

PROTECTIVE COVERS REMOVED OR

DAMAGED.

ANY ELECTRICAL WIRING OR REPAIRS

REQUIRED ON THIS PROOUCT SHOULD BE

PERFORMED BY AUTHORIZED SERVICE

CENTER PERSONNEL IN ACCORDANCE WITH

NATIONAL AND LOCAL ELECTRICAL CODES.

MAKE CERTAIN THAT THE ELECTRICAL

CIRCUIT TO WHICH THE COMPRESSOR IS

CONNECTED PROVIDES PROPER

ELECTRICAL GROUNDING, CORRECT

VOLTAGE AND ADEQUATE FUSE

PROTECTION.

WARNING: RISK TO BREATHING

WHAT CAN HAPPEN

THE COMPRESSED AIR DIRECTLY FROM

YOUR COMPRESSOR IS NOT SAFE FOR

BREATHING. THE AIR STREAM MAY

CONTAIN CARBON MONOXIDE, TOXIC

VAPORS, OR SOLID PARTICLES FROM THE

TANK. BREATHING THESE CONTAMINANTS

CAN CAUSE SERIOUS INJURY OR DEATH.

SPRAYED MATERIALS SUCH AS PAINT, PAINT

SOLVENTS, PAINT REMOVER, INSECTICIDES,

WEED KILLERS, MAY CONTAIN HARMFUL

VAPORS AND POISONS.

HOW, TO PREVENT IT,

AIR OBTAINED DIRECTLY FROM THE

COMPRESSOR SHOULD NEVER BE USED TO

SUPPLY AIR FOR HUMAN CONSUMPTION. IN

ORDER TO USE AIR PRODUCED BY THIS

COMPRESSOR FOR BREATHING, SUITABLE

RLTERS AND IN-LINE SAFETY EQUIPMENT

MUST BE PROPERLY INSTALLED. IN-LINE

FILTER8 AND SAFETY EQUIPMENT USED IN

CONJUNCTION WITH THE COMPRESSOR

MUST BE CAPABLE OF TREATING AIR TO

ALL APPUCABLE LOCAL AND FEDERAL

CODES PRIOR TO HUMAN CONSUMPTION.

WORK IN AN AREA WITH GOOD CROSS-

VENTILATION• READAND FOLLOWTHE

SAFETY INGTRUCTIONS PROVIDED ON THE

LABELOR SAFEW DATA SHEETS FOR THE

MATERIAL YOU ARE SPRAYING. USE A

NIOSWMSHA APPROVED RESPIRATOR

DESIGNED FOR USE WITH YOUR SPECIFIC

APPUCATION_

D24580 6- ENG

WARNING: RISK OF BURNS

WHAT CAN HAPPEN

TOUCHING EXPOSED METAL SUCH AS THE

COMPRESSOR HEAD OR OUTLET TUBES,

CAN RESULT IN SERIOUS BURNS.

HOW TO PREVENT IT

NEVER TOUCH ANY EXPOSED METAL

PAIRTS ON COMPRESSOR DURING OR

IMMEDIATELY AFTER OPERATION.

COMPRESSOR WILL REMAIN HOT FOR

SEVERAL MINUTES AFTER OPERATION.

DO NOT REACH AROUND PROTECTIVE

SHROUDS OR AI"rEMPT MAINTENANCE

UNTIL UNIT HAS BEEN ALLOWED TO COOL.

WARNING: RISK FROM MOVING PARTS

WHAT CAN HAPPEN

MOVING PARTS SUCH AS THE PULLEY,

FLYWHEEL AND BELT CAN CAUSE SERIOUS

INJURY IF THEY COME INTO CONTACT WiTH

YOU OR YOUR CLOTHING,

AI"rEMPTING TO OPERATE COMPRESSOR

WITH DAMAGED OH MI,SSING PARTS OR

ATTEMPTING TO REPAIR COMPRESSOR

WITH PROTECTIVE SHROUDS REMOVED CAN

EXPOSE YOU TO MOVING PARTS AND CAN

RESULT IN SERIOUS INJURY.

HOW TO pREVENT IT

NEVER OPERATE THE COMPRESSOR WITH

GUARDS OR COVERS WHICH ARE DAMAGED

OR REMOVED.

ANY REPAIRS REQUIRED ON THIS PRODUCT

SHOULD BE PERFORMED BY AUTHORIZED

SERVICE CENTER PERSONNEL

WARNING: RISK OF FALUNG

WHAT CAN HAPPEN

APORTABLE COMPRESSOR CAN FALL

FROM A TABLE, WORKBENCH OR ROOF

CAUSING DAMAGE TO THE COMPRESSOR

AND COULD RESULT IN SERIOUS INJURY

OR DEATH TO THE OPERATOR,

I_OW TO PREVENT IT

ALWAYS OPERATE COMPRESSOR IN A

STABLE 8ECURE POSITION TO PREVENT

ACCIDENTAL MOVEMENT OF THE UNIT.

NEVER OPERATE COMPRESBOR ON A ROOF

OR OTHER ELEVATED PosITION. USE

ADDITIONAL AIR HOSE TO REACH HIGH

LOCATIONS.

7-ENG D24580

WARNING: RISK OF PROPERTY DAMAGE WHEN

TRANSPORTING COMPRESSOR

(Fire, Inhalation, Damage to Vehicle Surfaces)

WHAT CAN HAPPEN

OIL CAN LEAK OR SPILL AND COULD

RESULT IN FIRE OR BREATHING HAZARD,

SERIOUS INJURY OR DEATH CAN RESULT.

OIL LEAKS WILL DAMAGE CARPET, PAINT OR

OTHER SURFACES IN VEHICLES OR

TRAILERS. =1 i

m,,. • iiii ii

HOW TO PREVENT IT

ALWAYS PLACE COMPRESSOR ON A

PROTECTIVE MAT WHEN TRANSPORTING TO

PROTECT AGAINST DAMAGE TO VEHICLE

FROM LEAKS. REMOVE COMPRESSOR FROM

VEHICLE IMMEDIATELY UPON ARRIVAL AT

YOUR DESTINATION_

WARNING: RISK OF UNSAFE OPERATION

WHAT CAN HAPPEN

UNSAFE OPERATION OF YOUR AIR

COMPRESSOR COULD LEAD TO SERIOUS IN-

JURY OR DEATH TO YOU OR OTHERS-

HOW TO PREV]ENT IT

REVIEW AND UNDERSTAND ALL

INSTRUCTIONS AND WARNINGS IN THIS

MANUAL

BECOME FAMILIAR WITH THE OPERATION

AND CONTROLS OF THE AIR COMPRESSOR.

KEEP OPERATING AREA CLEAR OF ALL

PERSONS. PETS. AND OBSTACLES.

KEEP CHILDREN AWAY FROM THE AIR

COMPRESSOR AT ALL TIMES.

DO NOT OPERATE THE PRODUCT WHEN

FATIGUED OR UNDER THE INFLUENCE OF

ALCOHOL OR DRUG6. STAY ALERT ATALL

TIMES,

NEVER DEFEAT THE SAFETY FEATURES OF

THIS PRODUCT.

EQUIP AREA OF OPERATION WITH A FIRE

EXTINGUISHER.

DO NOT OPERATE MACHINE WITH MISSING,

BROKEN, OR UNAUTHORIZED PARTS.

D24580 8-ENG

Become familiar with these terms

before operating the unit.

CFM: Cubic feet per minute.

SCFM: Standard cubic feet per

minute; a unit of measure of air

delivery.

PSIG: Pounds per square inch

gauge; a unit of measure of pressure.

Code Certification: Products that

bear one or more of the following

marks: UL, CUL, ETL, CETL, have

been evaluated by OSHA certified

independent safety laboratories and

meet the applicable Underwriters

Laboratories Standards for Safety.

Cut-In Pressure: While the motor is

off, air tank pressure drops as you

continue to use your accessory.

When the tank pressure drops to a

certain low level the motor will restart

automatically. The low pressure at

which the motor automatically

restarts is called "cut-in" pressure.

Cut-Out Pressure: When an air

compressor is turned on and begins

to run, air pressure in the air tank

begins to build. It builds to a certain

high pressure before the motor

automatically shuts off, protecting

your air tank from pressure higher

than its capacity. The high pressure

at which the motor shuts off is called

"cut-out" pressure.

Branch Circuit: Circuit carrying

electricity from electrical panel to

outlet.

This unit is capable of powering the following Accessories. The accessories are

available through the current Power and Hand Tool Catalog or fuU-line Sears

stores.

Accessories

•In Line Filter

•Tire Air Chuck

•Quick Connector Sets (various

sizes)

•Air Pressure Regulators

• Oil Fog Lubricators

• Air Hose:l/4", 3/8" or 1/2" I.D. in

various lengths

Refer to the selection chart located

on the unit to select the tools this unit

is capable of powering.

Air compressors should be operated

on not more than a50% duty cycle.

This means an air compressor that

pumps air more than 50% of one

hour is considered misuse, because

the air compressor is undersized for

the required air demand. Maximum

compressor pumping time per hour is

30 minutes.

9-ENG D24580

Contents of Carton

1-Air Compressor

1- Handle

4 - Self Tapping Screw

2- Wheels

2 - Shoulder Bolts, 3/8-16

2 - Hex Nuts, 3/8-16

I - Rubber Strip

Tools Required for Assembly

1 - 9/16" socket or open end wrench

1 - 1/2" socket or open end wrench

Unpacking

1. Remove unit from carton and

discard all packaging. NOTE:

Save all parts bags.

Assemble Handle

1. Insert the handle inside the

compressor saddle and line up

the two bolt holes on each side.

Install the four screws, two on

each side.

Tighten securely.

Assemble Wheels

It will be necessary

to brace or support

one side of the air compressor

when installing the wheels because

the air compressor will have a

tendency to tip.

1. Attach wheels with shoulder

bolts and nuts as shown.

2. Tighten securely. NOTE: The air

compressor will sit level if the

wheels are properly installed.

The wheels and

handle do not

provide adequate clearance,

stability or support for pulling the

unit up and down stairs or steps.

The unit must be lifted, or pushed

up a ramp,

Assemble Rubber Strip

1. Clean and dry underside of air

tank leg opposite wheels.

2. Remove the protective paper

strip from the adhesive backed

rubber foot strip.

3. Attach the rubber foot strip to

the bottom of leg. Press firmly

into place.

Shoulder

Wheel Bolt

Rubber Strip

D24580 10-ENG

Andere Handbücher für 919.165180

Andere Craftsman Luftkompressor Handbücher

Craftsman

Craftsman Craftsman 919.150270 Bedienungsanleitung

Craftsman

Craftsman 921.166370 Bedienungsanleitung

Craftsman

Craftsman 919.184193 Bedienungsanleitung

Craftsman

Craftsman 919.153090 Bedienungsanleitung

Craftsman

Craftsman 16923 Bedienungsanleitung

Craftsman

Craftsman 921.16472 Bedienungsanleitung

Craftsman

Craftsman 919.176850 Bedienungsanleitung

Craftsman

Craftsman 919.727320 Bedienungsanleitung

Craftsman

Craftsman 390.291352 Bedienungsanleitung

Craftsman

Craftsman 919.167342 Bedienungsanleitung

Craftsman

Craftsman 919.166442 Bedienungsanleitung

Craftsman

Craftsman 919.167460 Bedienungsanleitung

Craftsman

Craftsman CMCC2520 Bedienungsanleitung

Craftsman

Craftsman CMXECXA0200141A Bedienungsanleitung

Craftsman

Craftsman 16914 Bedienungsanleitung

Craftsman

Craftsman 919.167463 Bedienungsanleitung

Craftsman

Craftsman 919.167243 Bedienungsanleitung

Craftsman

Craftsman 919.167620-C Bedienungsanleitung

Craftsman

Craftsman 919.7243 Bedienungsanleitung

Craftsman

Craftsman 919.727321 Bedienungsanleitung

Craftsman

Craftsman 919.727570 Bedienungsanleitung

Craftsman

Craftsman Air compressor Bedienungsanleitung

Craftsman

Craftsman 16781 - Professional 80 Gal. Vertical Air... Bedienungsanleitung

Craftsman

Craftsman 919.72755 Bedienungsanleitung

Beliebte Luftkompressor Handbücher anderer Marken

Sparmax

Sparmax DC-25XR Bedienungsanleitung

KAESER

KAESER M122 Bedienungsanleitung

GMC

GMC GAC1500 Bedienungsanleitung

Briggs & Stratton

Briggs & Stratton Air Compressor Bedienungsanleitung

Fini

Fini F3GST2TK Bedienungsanleitung

Industrial Air

Industrial Air CP1580325 Programmierhandbuch

Campbell Hausfeld

Campbell Hausfeld RP3300 Kurzanleitung

Ingersoll-Rand

Ingersoll-Rand UP6 20 HP Bedienungsanleitung

Hitachi

Hitachi EC99S Bedienerhandbuch

Parkside

Parkside PKO 270 A1 Bedienungsanleitung

Sullair

Sullair 185 Bedienungsanleitung

Clas Ohlson

Clas Ohlson QIE-ZTH-15 Bedienungsanleitung

Ferm

Ferm CRM1046 Bedienungsanleitung

BE AC153 Bedienungsanleitung

RIDGID

RIDGID OF25150A Bedienungsanleitung

Johnson Controls

Johnson Controls QUANTUM LX Handbuch

Sears

Sears Craftsman 919.167463 Bedienungsanleitung

Ring Automotive

Ring Automotive RAC700 Bedienungsanleitung