Remington Power Tools 494 User's Manual
Contents
1.2. Tang Spring N D Tang Cap Muzzle Cap Piston Troubleshooting Guide PROBLEM Piston rod hangs out of muzzle cap Overdriving of power fastener Piston jammed Expended power load will not extract Reduction or loss of power POSSIBLE CAUSE Piston not properly assembled in relation to tang Broken piston Excessive power Overdriving of power fastener see above Buffer binding on piston in muzzle cap Dirty or damaged receiver chamber Piston not returning to full rear position Worn piston ring Broken piston 16 REMEDY Remove barrel assembly Follow instructions for piston change Replace all damaged or missing parts Replace piston Change either to next lower power load or use next longer fastener length Remove barrel assembly Follow instructions for buffer replacement page 21 Replace other parts if damaged Clean receiver chamber If power loads will not chamber with a slip fit or extraction difficulties continue take tool to your distributor for repair Barrel must be opened fully to the full extended position to properly position piston Remove piston Replace piston ring Replace piston 101437 Troubleshooting Guide cont PROBLEM Tool does not completely depress Tool does not fire Opening and closing of barrel or pushing down of the tool etc is not smooth but is rough or binds Departme
3. cleaning or assembling ASSEMBLY 1 Place buffer small end first in muzzle cap Push piston all the way into the barrel Screw muzzle cap into barrel Piston Muzzle Cap a oa Barrel Buffer Small End in Muzzle Cap 2 Drop breech spring in receiver Drop breech in receiver Line up slot in top of breech with hole in the receiver Use barrel to push breech assembly up in the receiver Hole Stop Pin _ lt Breech Spring Breech Receiver Barrel Assembly a 3 Insert stop pin through hole in receiver and into the slot on breech Remove barrel as sembly Breech should remain in place Stop Pin in Breech Slot Breech wi Barrel Assembly a Breech Spring Receiver 4 Reinsert barrel assembly slotted side down into receiver Turn tool over With barrel touching breech insert tang and tang spring into hole on bottom of receiver Make sure tang drops into the slot in the barrel Screw on tang cap completely Tang cap must always be kept tight to ensure proper opera tion of tang Tang Cap _ Tang Spring Tang a Barrel C Receiver Barrel Assembly 5 Place sear spring on breech through slot in bottom of receiver Slide long side of sear with hole between breech and breech spring Attach firing pin spring to firing pin Insert firing pin through hole on end of the receiver and through hole on sear Sear Firing Pin S and Spring Sear
4. MASTER SERVICE CENTER 1184 Wilson NW Grand Rapids MI 49504 US 1 800 446 1446 616 791 4760 Mike Fowler MANZO ASSOCIATES 1645 Bustleton Pike Feasterville PA 19053 215 364 0480 Parts Department 21st CENTURY RD 2 Box 165 Perkasie PA 18944 215 795 0400 1 800 325 4828 Parts Department BLUEBONNET TOOL 10490 Shady Trail Suite 104 Dallas TX 75220 214 358 2363 Ken Perry CLARK SUPPLY 9435 Summerbell Houston TX 77074 713 771 0404 Parts Department Parts List Model 494 KEY PART NO NO DESCRIPTION QTY 1 101123 01 Screw 1 4 20 x 1 25 2 2 101122 01 Washer 2 3 101128 01 Handle amp Trigger Assembly 1 4 056217 Firing Pin Spring 1 5 075370 Firing Pin 1 6 101148 01 Breech Spring 1 ri 100858 01 Breech 1 8 101124 01 Stop Pin 1 9 101127 01 Barrel and Insert Assembly 1 10 101126 01 Piston and Ring Assembly 1 10A 101439 01 Piston Ring 1 11 100856 01S Receiver Assembly 1 12 100864 01 Tang 1 13 TA4083 Buffer 5 Pack 1 14 100857 01S Muzzle Cap 1 15 101147 01 Tang Spring 1 16 100862 01 Tang Cap 1 17 056218 Sear Spring 1 18 076657 Sear 1 IMPORTANT Do not use key numbers when ordering service parts Always order components by part number and description Include model number and serial number of tool 101437 PART NO DESCRIPTION 101320 02 Spall Shield 056415 Goggles 056485 Brush 1 4 056486 Brush 5 8 103754 Hex Wrench 3 16 Accessories For Parts and Accessories please contact your dealer or
5. NEVER have the power fastener point protrude through the concrete NOTE Concrete needs to cure for 28 days before maximum fastening holding power will be achieved WHY A POWER FASTENER HOLDS IN STEEL Holding power in steel depends on the elasticity of the steel The steel pushes back on the shank of the power fastener Drop a marble into water the water parts the marble continues o a down the water closes back This is similar to the reaction when a power fastener penetrates steel l In steel the point of the power fastener must penetrate completely through for highest holding power If the fastener does not penetrate the spring action of the steel pushes back on the point and tends to force the fastener out Recommended applications are between 3 16 3 8 steel NOTE When fastening in steel be sure the point goes through the steel 101437 Selecting Power Fasteners and Power Loads FASTENING INTO CONCRETE The proper power fastener length can be determined by adding the thickness of the material to be fastened and the amount of fastener that will actually penetrate the concrete The concrete must be three times as thick as the intended fastener penetration In most cases penetration should be approximately 1 to 1 1 4 into the base concrete material Wood or Non Metals To Concrete FASTENING INTO STEEL The proper fastener length can be determined by adding the thickness of the material to be fastened and
6. Spring w ZA gies A oe LEE be ra Sj 8 Receiver 6 Attach handle and trigger assembly to re ceiver with two screws and washers Washers IS Screws Q O Receiver Trigger and Handle Assembly 101437 Buffer and Piston Replacement WARNING Always unload a powder actuated tool before disassembling replacing barrel cleaning or assembling IMPORTANT This tool is equipped with a piston buffer The buffer stops the piston before it makes contact with the muzzle cap This protects the barrel and muzzle cap Inspect and replace the buffer on a regular basis Worn Piston Buffer New Piston Buffer TO REPLACE BUFFER AND PISTON 1 a Remove tang cap tang spring and tang Slide barrel assembly from receiver Barrel Assembly Receiver cy g Tang eo Tang Spring ta Tang Cap b Remove muzzle cap from barrel by un screwing counterclockwise Muzzle Cap Barrel A c Insert a rod or screwdriver into barrel chamber and push piston and buffer out of barrel Piston Barrel E Piston Buffer Barrel Chamber 101437 TO REASSEMBLE IMPORTANT Inspect piston ring and replace if worn 1 Install new piston ring onto piston if required a Remove old piston ring b Install new ring The piston ring consists of three turns Place one end into groove and twist around piston until it is com pletely in groove Piston Piston
7. ache EREE ri aeai rei i aiiai 20 Buffer and Piston Replacement cccccsssececcesseeeceeeseeceseseeeceaeeeeeseeseeesseaseeesees 21 Application Chart s aocaeseencas st eesicecetccetenestacdsueesesceteseeceeachccnscedatatauceeanceicseeetaaeeeeeoneetass 22 W oenar E OEE Back Cover REMINGTON Model 494 Powder Actuated Fastening Tool The Remington Model 494 Powder Actuated Fastening Tool is designed for use with Remington 22 caliber Type A crimped loads and Remington Power Fasteners Remington power fasteners are manufactured from special steel and heat treated to produce a very hard yet ductile fastener Maximum 3 76 mm Spall Shield Power Load Power Fastener Barrel Assembly Muzzle Guide Recommended Approved Goggles Not provided with tool 101437 A Warning Safety Precautions The following pages contain detailed warnings cautions and rules of safe operation Read carefully and become familiar before operating to avoid serious injury We expressly disclaim any liability for any injury to persons or damage to property which result from your failure to take the precautions contained in this manual A WARNING This tool is designed only for use by qualified operators Qualification is obtained through a thorough understanding of the Safety Warnings and operating instructions as defined in this operating manual NOTE The labor regulations of many states require that the operator of this tool on a job
8. distributor If they are unable to satisfy your requirements please contact DESA International at the locations as stated on back page Tool Disassembly and Assembly WARNING Always unload a powder actuated tool before disassembling replacing barrel cleaning or assembling DISASSEMBLY 1 a Remove tang cap tang spring and tang Slide barrel assembly from receiver Barrel Assembly Receiver o Tang Tang Spring T Tang Cap b Remove muzzle cap from barrel by un screwing counterclockwise Muzzle Cap Barrel c Insert a rod or screwdriver into barrel slot and push piston and buffer out of barrel Piston Barrel ond RUNE Barrel Slot 101437 2 Remove upper screws from handle and trig ger assembly Slide receiver from handle and trigger assembly Remove firing pin and firing pin spring Sear and sear spring will fall out when firing pin is removed Receiver Firing Pin Spring Screws 7 a Sear Spring A Sear Firing Pin Handle and Trigger Assembly 3 Insert the barrel back into the receiver and press down This will release the stop pin Remove the stop pin Remove barrel breech and breech spring from receiver Stop Pin Breech f ol Breech Spring Barrel Receiver Tool Disassembly and Assembly WARNING Always unload a powder actuated tool before disassembling replacing barrel
9. site be thoroughly trained and certified for competence prior to operating this tool For certification procedures call DESA Technical Services Department 1 800 626 2237 BEFORE USING 1 ALWAYS handle the tool as if it were loaded Before starting work check that the tool is unloaded and the muzzle is clear NEVER load a tool unless it is going to be used 2 ALWAYS inspect to make sure the tool is working properly If the tool does not work properly remove from service and tag DEFECTIVE DO NOT use the tool again until it has been properly repaired Operators and bystanders must ALWAYS wear goggles and ear protection which meet or exceed ANSI standards 101437 Safety Precautions WARNING POWDER ACTUATED TOOLS IN USE 4 5 ALWAYS make sure the work area is clean from loose material and debris HANDLING THE TOOL l nd 1 NEVER place your hand over the muzzle Accidental discharge can cause serious injury 2 NEVER place your finger on the trigger until the tool s muzzle is against the work surface 101437 Safety Precautions 3 ALWAYS store UNLOADED powder actuated tool and power loads in a locked container Keep power loads of different power levels in separate containers 4 NEVER carry or pass a loaded powder actuated tool NEVER point a powder actuated tool at anyone 5 Ift
10. the thickness of the steel The point of the power fastener must go completely through the steel Wood or Non Metals To Steel POWER LOADS Always start with the lowest power level gray level 1 If the first test fastener does not penetrate to the desired depth move to the next highest power level obrown level 2 Increase until a proper fastening is made IMPORTANT Damage to the tool will result if the above instructions are not followed see illustrations to right and lower right OVERDRIVEN POWER FASTENERS AND PISTON An overdriven power fastener results when too strong of a power load is used causing the piston to extend past the muzzle Move to the next lightest power load Repeated overdrive will damage your tool By avoiding overdrive you can extend the life of your tool considerably and avoid costly repairs NOTE NEVER fire the tool without a power fastener This can damage the tool and or cause possible injury to the operator Piston Extended Out of Muzzle 101437 Operation 1 Grasp muzzle and slide barrel forward rapidly until it stops This sets piston into firing position and opens the chamber 2 Insert power fastener into muzzle of tool head end first Push the fastener until point is even with end of tool ALWAYS load the fastener first then the power load NOTE E Failure to start with the lowest power level can result in overdrive condition and will result in dama
11. Ring 2 Place buffer small end first in muzzle cap Push new piston all the way into the barrel Screw muzzle cap into barrel Barrel Piston Piston Buffer Small End in Muzzle Cap 3 Reinsert barrel assembly slotted side down into receiver Turn tool over With barrel touching breech insert tang and tang spring into hole on bottom of receiver Make sure tang drops into the slot in the barrel Screw on tang cap completely Tang cap must always be kept tight to ensure proper operation of tang Tang Cap _ Tang Spring Tang can G Barrel NW Application Chart Power load and power fastener application information power fastener power load For fastening this to this length color Two by fours Concrete 21 2 Green Cement block 2 1 2 H Green Steel 3 16 to 3 8 thick 2 Yellow Concrete 1 1 2 Green Furring strips Cement block 1 1 2 Green Steel 3 16 to 3 8 thick 2 Yellow Metal electrical ok aa I a H soe junction boxes Q ement bloc rown i Ls Steel 3 16 to 3 8 thick 1 Yellow Concrete 1 Green Conduit clips Cement block T 1 H Brown Steel 3 16 to 3 8 thick 1 Yellow Concrete j r H Green shelf Drackets Cement block 1 Brown E Concrete 1 1 4 Green 1 lies et Cement block 1 1 4 H Green p Steel 3 16 to 3 8 thick 11 4 Yellow Power load listings a
12. Santee See i Model 494 Powder Actuated Fastening Tool FAI POWDER ACTUATED TOOL MANUFACTURERS INSTITUTE INC Operating Instructions IMPORTANT Read this manual and all labels carefully before operating your powder actuated tool This manual should always accompany the tool and be transferred with it upon change of ownership Warning Safety Precautions cccccccccccecsesseseececeeeeeseeeeeeceeeeeeeeeessaeaaeeeseeeeeeess 3 11 Why A Fastener HoldS ea seceeee cede cc ence ren cecsuneracoereanereacortecuobocndincenessiucoseneeeantpecmerts 12 Selecting Fasteners and Power LoadS cccccesessseeeeeeeeeeeeseaeeseeeeeeeeeeseesaeaeeseeeees 13 DOr ON ere E E E Gememncecoe E EE 14 INCU ANIC C22 ccs ecn dn shen seveuiesesuansacdedsaenacicesdadastavecntesiienoecedhiedaniescaenacnauhesceneiedseaadees 16 fA cee 9 2 ae ie c eeeneneeneeeeceet enter innne aaa a ree hem eer ee 16 Parts Centrals scnrensionsanseaeslananasanestesiyacenaieaniessaibensddlanisaueaniasbupenrinantsinarad senilenGvahsdnadanessinnn s 17 PAE OU o E E se ecesee cece tenet aneceeenuersesasesseessreresceutiee 18 PCC SS SONS 2s veectosnassenacasenn aceecetdncodncsnbaieedieesa cesncessensatanediccessubseitocnenaacaeaeceutecenic otece 19 Tool Disassembly tase ctcceiastenaetert ence cerecccatecesbecent oenemeseenu iecerceca in dmenes casunuoseeeesetedcetecais 19 TOOLASSEMDI V sscsecesestcccies cian ete eeenercesideavecasstsecesee
13. econds Release the trigger and remove pressure on the tool while holding the muzzle against the work surface Again press the tool firmly against the work surface and pull the trigger If the tool still fails to fire hold the tool firmly against the work surface for another 30 seconds before unloading and carefully discarding the misfired power load into water or oil ee ee We Fh oe V4 ESN a a gt Eis NAPNE si Oe SSN a 3 ALWAYS use the spall shield when driving directly into concrete or steel Always wear approved goggles 4 NEVER use a powder actuated tool in an explosive or flammable atmosphere or when non sparking tools are required POWER LOADS AND FASTENERS 1 NEVER leave unfired power loads on floors or work surfaces 101437 9 Safety Precautions eee NOTE A gt Failure to start with gt the lowest power ca level can result in overdrive condition G7 and will result in damage to tool See page 13 2 Remington power loads are available in four power levels with gray 1 being the lowest power level and yellow 4 being the highest power level Always start with the lowest power level gray level 1 and increase until a proper fastening is made see page 13 Selecting Fasteners and Loads 3 NEVER use power loads in firearms 5 A c
14. ed to cast iron glass tile stone brick or hardened steel Materials of this type tend to shatter and create hazard from flying particles 3 NEVER make fastenings in spalled or cracked areas 4 NEVER drive power fasteners into thin or easily penetrated materials unless it is backed by concrete or steel When in doubt such as when base material is concealed conduct a Center Punch Test See page 6 Check continually to avoid fastening into unsuitable material especially in older buildings 5 DONOT fasten through or within 1 2 of predrilled or pre punched holes 101437 Safety Precautions 6 DO NOT drive power fasteners into concrete less than three times as thick as the intended fastener penetration within 3 of the edge within 3 of another power fastener or within 3 of a failed power fastener ee wy N t DO NOT drive power fasteners into steel base material less then 3 16 thick within 2 of a weld within 1 2 of the edge or within 1 of another power fastener 8 When fastening into masonry walls always drive into horizontal mortar joints never into vertical mortar joints BE CAREFUL A poorly laid joint may permit too much penetration and or unsatisfactory holding power OPERATING THE TOOL 1 ALWAYS hold tool perpendicular to work surface 101437 8 Safety Precautions 2 Should the tool fail to fire hold the muzzle firmly against the work surface for 30 s
15. eing experienced DESA will send replacement part s repair or replace the tool at DESA s option However this warranty does not cover failures caused by misusing or abusing the product for proper use of this product read and understand the operating instructions in this owners manual Repairs made because of misuse abuse negligence or accident will be charged for at regular repair prices This express and limited warranty is the only warranty on this product and to the full extent permitted by law there are no other warranties express or implied including warranties of merchantability and or fitness for a particular purpose which extend beyond the terms of this express and limited warranty To the full extent permitted by law the liability of DESA for personal injury property damage or any other damage whatsoever including consequential and incidental damages arising from the sale or use of this product shall not exceed the purchase price of this product This warranty gives you specific legal rights and you may also have other rights which vary from state to state For information about this warranty write DESA INTERNATIONAL P O Box 90004 2701 Industrial Drive Bowling Green KY 42102 9004 502 781 9600 For Technical Assistance or Repair on Your Remington Powder Actuated Tool Call Technical Services Department 1 800 323 5190 For Certification Procedures Call 1 800 626 2237 101437 01 REV F 7 95
16. ge to tool see page 13 3 Select the proper Remington Power Load and insert into the chamber until it stops see Application Chart on page 23 4 Push barrel into housing to the closed position 101437 Operation 5 Place the muzzle of tool perpendicular to work surface without tilting the tool Push tool against work surface until sliding action of barrel stops 6 Squeeze trigger to set power fastener Be sure to keep pressure on tool during this operation 7 After fastening is made slide barrel forward rapidly This motion ejects the spent power load and resets the piston for the next fastening Make sure spent load has ejected from tool 8 Should the tool fail to fire hold the muzzle firmly against the work surface for 30 seconds Release the trigger and remove pressure on the tool while holding the muzzle against the work surface Again press the tool firmly against the work surface and pull the trigger If the tool still fails to fire hold the tool firmly against the work surface for another 30 seconds before unloading and carefully discarding the misfired power load into water or oil 101437 15 Maintenance IMPORTANT Clean your tool after each day s use The parts shown in the illustration below should be cleaned daily Clean metal parts with accessory wire brushes Apply penetrating lubricant sparingly and wipe dry Barrel Receiver REMIN Buffer Y Tang D lt r yy
17. he tool is dropped inspect for damage and repair it before continuing to work NEVER use a damaged tool Ea ase Y A Po ENY 6 ALWAYS take precaution to maintain your balance while operating a powder actuated tool 101437 Safety Precautions 7 An operator taking medication should take extra precautions while handling the tool NEVER drink alcoholic beverages or take medications which impair your vision balance or judgement before using a powder actuated tool KNOW YOUR FASTENING BASE MATERIAL CENTER PUNCH TEST ok ALWAYS know the thickness and type of base material into which you are fastening NEVER GUESS Test the base material by using the Center Punch Test The Center Punch Test is performed by using a hammer to test drive the particular power fastener to be used into the material If the point penetrates easily the material is too soft If the point becomes blunt the material is too hard If the material fractures cracks or shatters the material is too brittle Test fastenings can be made if the material shows a clear fastener impression and the fastener point is not blunted ALWAYS start with the lowest power load Gray Level 1 and proceeding with the order shown in the lower right hand figure above Always wear approved goggles 101437 Safety Precautions 2 NEVER attempt to drive power fasteners into very hard or brittle materials including but not limit
18. nt at 1 800 972 7879 POSSIBLE CAUSE Misassembled or damaged breech and firing pin parts Failure of tool to depress completely Dirt buildup on breech not allowing proper penetration of firing pin Lack of proper cleaning REMEDY Remove breech and check all parts for correct fit assembly See data listed under Tool Does Not Completely Depress above Check firing pin indentation on cartridge Clean breech breech face and firing pin Inspect and clean complete tool see Maintenance on page 16 Replace worn or damaged parts Parts Centrals Contact authorized dealers of this product If they can t supply original replacement part s either contact your nearest Parts Central see below or call DESA International s Parts When calling DESA International have ready e model number of your tool RAILWAY DISTRIBUTORS 264 Railway Avenue Campbell CA 95008 408 866 9266 Guy Bothelho BALTIMORE ELECTRIC 1348 Dixwell Avenue Hamden CT 06574 1 800 397 7553 203 248 7553 Parts Department ALL TOOL amp FASTENER 7830 N W 72nd Avenue Miami FL 33166 305 888 6909 Parts Department PRECISION TOOL 431 Commerce Park Drive Suite 106 Marietta GA 30060 404 421 0688 Bob Young 101437 e replacement part number PORTABLE HEATER PARTS 342 No County Road 400 East Valparaiso IN 46383 219 462 7441 1 800 362 6951 FBD 601 Hope Street Bowling Green KY 42101 502 796 8406 1 800 654 8534
19. olor blind person must take extra precautions to prevent the chance of mixing the power loads of various levels 101437 Safety Precautions Power fasteners are a permanently installed fixture An act of demolition is required for their removal Appropriate safety precautions must be taken Plastic Flute 7 NEVER use common nails or other materials as fasteners Remington Power Fasteners are manufactured from special steel and heat treated to produce a very hard yet ductile fastener NEVER pry a power load out of the tool Prying can discharge the load causing serious injury see Troubleshooting Guide page 16 9 ALWAYS insert the power fastener first then the power load If work is interrupted for any reason ALWAYS remove the power load before removing the power fastener see page 15 item 7 101437 Why A Power Fastener Holds WHY A POWER FASTENER HOLDS IN CONCRETE The compression bond of the concrete to the power fastener accounts for the majority of the holding power The fastener dis places the concrete which tries to return to its original form causing a squeezing effect Maximum holding power is achieved when the depth of penetration produces a bond on the power fastener equal to the strength of the concrete As a general rule penetration should be approximately 1 to 1 1 4 into the base concrete Make sure the concrete is at least three times as thick as the intended fastener penetration
20. re recommendations only If you are in doubt try a test fastening using the next lightest power load IMPORTANT This tool is designed to use 22 caliber neck down crimped loads power levels 1 gray through 4 1 4 Neck Down Straight Wadded Crimped Power Load Power Load A CAUTION Do not use any load other than the 22 caliber neck down crimped load Other types of loads will cause load ejection problems 101437 22 IMPORTANT Application Chart e f power fastener goes below the top surface of the board use penetrating control disc see illustration below e Always wear approved eye and ear protection Use power fastener with penetration control disc part number 015549 22 CALIBER Type A Crimp Loads for powder actuated tools 101437 Color Code Load Case Number Number Strength Body Head light medium heavy extra heavy 23 Limited Warranty Agreement DESA International warrants the Remington Model 494 Powder Actuated Fastening Tool against defects in materials and workmanship for a period of one 1 year from the date of purchase If within one 1 year from the purchase date this Powder Actuated Tool fails due to a defect in material or workmanship DESA will repair or replace the tool at DESA s option To obtain service under this warranty contact DESA at the number address listed below You must have the Serial Number Model Number date of purchase and indicate the type of problem b
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