Hitachi H90SB User's Manual
Contents
1. Eaa No of Carbon Auto stop carbon LE Brush Fig 4 5 Replacing a carbon brush Loose the screw Hexagon socket hd bolt M5 x 10 of the tail cover then remove the tail cover Fig 1 After removing the brush cap the carbon brush can be removed After replacing the carbon brush tighten the brush cap then mount the tail cover securely NOTE Due to HITACHI s continuing program of research and development the specifications herein are subject to change without prior notice Item 1 Roll Pin D6 x 36 3 O Ring o R F H R a Part Name Z O 7 1 N s a AJOJN 17 Handle Rubber Support o O S Support S 5 0 15 Hexagon Socket Hd Bolt M6 x 16 E Type Retaining Ring 0 O Pin o O 20 21 22 23 24 6 7 8 9 0 1 2 3 4 5 6 7 B Washer S O Washer 2 2 2 2 3 3 3 3 3 3 3 3 w 00 O Ring B 42 Piston Pin 43 45 39 41 Terminal S y O 1 Terminal all Bearing 6305ZZCM Oil Seal Beari Spri 47 50 z 2 3 4 ORing o O 5 BearingBoss _ _ _ _ _ o O 6 Spring Lock Washer __ _ 7 Hexagon Socket Hd Bolt M6 x 20 5 5 5 5 5 5 Item rank Washer Hexagon Socket Hd Bolt M10 x 16 C onnector Connector Z 58 59 63 Internal Wire 67 __ Hexagon Socket Hd Bolt M8 x 30 77 OilCap o 78 __ Tail Cover S 79 Spring LockWasher _ _ _ Hexagon Socket Hd Bolt M5 x2. The use of any other attachment or accessory is not recommended because it may cause hazard including bodily injury STANDARD ACCESSORIES 1 Hexagon Bar Wrench 10 mm for M12 Code No 993740 ccccccsssececessseeeeeeeeeeeesaes 1 2 Hexagon Bar Wrench 6 mm for M8 Code No 872422 ccccccccssssccceseseeeeceeseeeeseseees 1 3 Hexagon Bar Wrench 4 mm for M5 Code No 944458 cccccscccccssseeeeeseseeseeeeeeeeens 1 4 Side Handle Code No 956527 x cuceccucpe tee oti icct coven aeonssase ive sauaues ve dvsiewoiaauenaeeaiamnelcesoeasuveeceueess 1 5 SOME Code No 949759 Z creeps ceces eaaeveaseacasannteccinen sestcnieewcecuaneecaaecceadecaitncdateneeeaaneeasteene 4 6 Spring Lock Washer Code No 949457 Z csc ccceseccsncccces vacesndvenstuctnsvertesdiseeudenslmadekaveusicensues 4 OPTIONAL ACCESSORIES sold separately 1 Bull point _ SF Overall length 20 15 32 520 mm Code No 985230 2 Cold chisel Taaa ee Overall length 20 15 32 520 mm Code No 985231 3 Scoop Overall length 21 1 2 546 mm Code No 985233 4 Cutter Overall length 20 15 32 520 mm Width 2 15 16 75 mm Code No 985232 APPLICATION This demolition hammer should be applied to breaking concrete chipping off concrete grooving bar cutting and driving piles in installation of piping and wiring sanitary facility installation machinery installation water supply and drainage work interior jobs harbor faciliti
3. 10 Rivet D2 5x4 8 B 70 71 72 73 74 75 76 F H Fa A H S B Hexagon Socket Hd Bolt M10 x 55 82 83 85 87 88 91 92 93 95 exagon Socket Hd Sect Screw M5x8 100 101 102 103 104 105 106 107 108 109 110 111 112 501 Hexagon Bar Wrench 4 mm 502 503 Parts are subject to possible modification without notice due to improvements n riction Piece n 79 80 82 83 84 85 86 87 88 89 90 1 92 93 94 95 96 98 99 100 ao 102 103 104 105 10 WARNING Some dust created by power sanding sawing grinding drilling and other construction activities contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm Some examples of these chemicals are e Lead from lead based paints e Crystalline silica from bricks and cement and other masonry products and e 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 those dust masks that are specially designed to filter out microscopic particles Issued by Hitachi Koki Co Ltd Shinagawa Intercity Tower A 15 1 Konan 2 chome Minato ku Tokyo 108 6020 Japan Distributed by Hitachi Koki U S A Ltd 3950 Steve Reynolds Blv
4. HITACHI Demolition Hammer Model H 90SB Instruction manual Note Before using this HITACHI Demolition Hammer carefully read through this INSTRUCTION MANUAL to ensure efficient safe operation It is recommended that this INSTRUCTION MANUAL be kept readily available as an important reference when using this power tool o Double insulation We sincerely thank you for selecting a HITACHI POWER TOOL To operate this power tool safely and efficiently please read this INSTRUCTION MANUAL carefully to get a good understanding of the precautions in operation capacity of the power tool use and the like IMPORTANT INFORMATION SAFETY RULES FOR THE POWER TOOL WARNING When using the power tool following basic safety precautions should always be followed to reduce the risk of fire electric shock and personal injury READ ALL INSTRUCTIONS 1 2 10 11 12 KEEP WORK AREA CLEAN Cluttered areas and benches invite injuries CONSIDER WORK AREA ENVIRONMENT Don t expose power tools to rain Don t use power tools in damp or wet locations Keep work area well lit Don t use the power tool in presence of flammable liquids or gases Power tools produce sparks during operation They also spark when switching ON OFF Never use power tools in dangerous sites containing lacquer paint benzine thinner gasoline gases adhesive agents and other materials which are combustible or explosive GUARD AGAINST E
5. LECTRIC SHOCK Prevent body contact with grounded surfaces For example pipes radiators ranges refrigerator enclosures KEEP VISITORS OR CHILDREN AWAY Do not let visitors or children contact the power tool or extension cord All visitors or children should be kept away from work area STORE IDLE POWER TOOLS When not in use power tools should be stored in dry and high or locked up place out of reach of children DON T FORCE THE POWER TOOL It will do the job better and safer at the rate for which it was intended USE RIGHT POWER TOOLS Don t force a small power tool or attachment to do the job of a heavy duty tool Don t use the power tool for purpose not intended for example don t use circular saw for cutting tree limbs or logs DRESS PROPERLY Do not wear loose clothes or accessories They can be caught in moving parts Rubber gloves and non skid footwear are recommended when working outdoors Wear protective hair covering to contain long hair USE SAFETY GLASSES All persons in the area where power tools are being operated should also wear safety eye protectors and face or dust masks if cutting operation is dusty DON T ABUSE CORD Never carry power tools by cord or yank the cord to disconnect the power tool from receptacle Keep the cord from heat oil and sharp edges DON T OVERREACH Keep proper footing and balance at all times MAINTAIN POWER TOOLS WITH CARE Keep power tools sharp and clean for better and safer perfo
6. Meter 0 25 26 50 51 100 101 150 0 7 6 7 9 15 2 15 5 30 5 30 8 45 7 Ampere Rating AWG More Not More Than Than 0 6 18 16 16 14 6 10 18 16 14 12 10 12 16 16 14 12 12 16 14 12 Not Recommended DOUBLE INSULATION SYSTEM ENHANCES SAFE OPERATION To enhance safe operation of this power tool HITACHI has adopted a double insulation system The term double insulation used here denotes an insulation system with two insulations physically separated and arranged between the electrically conductive material connected to the power supply and the outer frame subject to contact by the operator Thus the power tool is termed double insulated and both the o mark and Double insulation or either one is indicated on the name plate DOUBLE INSULATION While no external grounding is required with this system normal safety precautions as outlined in this manual must still be followed To maintain the effectiveness of the double insulation system follow the precautions described below 1 Always contact your dealer or an authorized service center when assembling disassembling or replacing parts other than accessories or carbon brushes Improper assembly and or replacement with wrong parts may result in eliminating the double insulation feature 2 Clean the exterior of the power tool with a soft cloth moistened with soapy water and dry thoroughly Chloric solvent gasoline and thinner will cause plastic comp
7. cement at the nearest authorized service center MAINTENANCE AND INSPECTION CAUTION Be sure to disconnect the plug before and during maintenance and inspection 1 Inspecting this demolition hammer Use of a dull accessory such as a bull point a cutter etc will cause motor malfunctioning and efficiency degraded Replace with a new one without delay when abrasion is noted 2 Inspecting the mounting screws Regularly inspect all mounting screws and ensure that they are properly tightened Should any of the screws be loose retighten them immediately Failure to do so could result in serious hazard 3 Inspecting the retainer Fig 2 and 3 The retainer may become loose due to excessive use Always pay attention to its proper functioning to securely hold the accessory shank portion If any wear and tear is found bring this demolition hammer to an authorized service center for maintenance service 4 Inspecting the carbon brushes Fig 4 The motor employs carbon brushes which are consumable parts When they become worn to or near wear limit it results in motor trouble When an auto stop carbon brush is equipped the motor will stop automatically At that time replace both carbon brushes with new ones which have the same carbon brush No shown in the Fig 4 In addition always keep carbon brushes clean and ensure that they slide freely within the brush holders Wear limit No of carbon brush Usual carbon brush a
8. ch a power tool Immediately have it repaired SECURELY MOUNT ACCESSORIES AND BLADES TO THE POWER TOOL MAIN BODY Extra care must be taken when using the power tool on elevated location such as a roof ladder scaffold or the like to prevent injury to someone underneath in the event the power tool and or accessory should drop ALWAYS KEEP THE MOTOR AIR VENT FULLY OPENED A constantly open motor air vent is necessary to allow air to come in and out for cooling the motor Do not allow it to become clogged up even if dust is blown through it OPERATE THE POWER TOOL AT THE RATED VOLTAGE Operate the power tool at voltages specified on its nameplate NEVER TOUCH THE MOVING PARTS Never touch the moving parts such as blades bits cutters and others 28 STOP OPERATION IMMEDIATELY IF ANY ABNORMALITY IS DETECTED Should the power tool be detected as out of order or should other abnormalities be observed during operation stop using the power tool immediately 29 NEVER LEAVE THE POWER TOOL RUNNING UNATTENDED TURN POWER OFF Don t leave the power tool until it comes to a complete stop 30 CAREFULLY HANDLE THE POWER TOOL Should the power tool be dropped or struck against hard materials inadvertently it may be deformed cracked or damaged 31 DO NOT WIPE PLASTIC PARTS WITH SOLVENT Solvents such as gasoline thinner benzine carbon tetrachloride and alcohol damage and crack plastic parts Do not wipe them with such solvents Wipe plastic parts
9. d Norcross GA 30093 itachi Koki Canada Co 302 6395 Kestrel Road Code No C99006764 N Mississauga ON L5T 125 Printed in Japan
10. es and other civil engineering work etc PRIOR TO OPERATION 1 Power source Ensure that the power source to be utilized conforms to the power requirements specified on the name plate of this demolition hammer Power switch Ensure that the power switch is in the OFF position If the plug is connected to a power receptacle while the power switch is in the ON position this demolition hammer will start operating immediately inviting serious accident Extension cord When the work area is remote from the power source use an extension cord of sufficient thickness and rated capacity The extension cord should be kept as short as practicable Confirm the power receptacle lf the power receptacle loosely accepts the plug the receptacle must be repaired Contact the nearest authorized service center for repair service If such a faulty receptacle is used it may cause overheating resulting in a serious hazard Confirming condition of the environment Confirm that the work site is placed under neat clean conditions conforming to prescribed precautions Mounting an accessory such as a bull point a cutter etc 1 With the retainer directed backward insert the accessory shank portion into the hole on the front cover Fig 2 2 Swing the retainer back into place so that it engages the accessory shank portion and prevents accessories from coming out of front cover Fig 3 NOTE Use a manual hammer to open close the retaine
11. nter unless otherwise indicated elsewhere in this instruction manual Have defective switches replaced by an authorized service center Do not use the power tool if switch does not turn it on and off AVOID USING A POWER TOOL FOR APPLICATIONS OTHER THAN THOSE SPECIFIED Never use the power tool for applications other than those specified in this instruction manual ENSURE SAFE OPERATION THROUGH CORRECT HANDLING Secure safe operation through correct handling by observing the instructions described herein Do not employ accessories other than those specified herein otherwise a hazardous condition may be created Never allow the power tool to be used by persons not familiar with correct handling such as chidren or by those who are not familiar with the power tool CONFIRM THAT NO ITEMS SUCH AS AN ELECTRIC CABLE OR CONDUIT ARE BURIED INSIDE In places where electric wiring may be hidden behind a wall floor ceiling etc do not hold or contact any metal parts of the poweer tool In such cases metal parts could become electrically live and present a serious shock hazard KEEP THE RIGHT PARTS IN THE RIGHT POSITIONS Do not remove covers and screws which have been factory mounted They perform important respective roles Keep them in the original positions SHOULD THE PLASTIC HOUSING OR HANDLE OF THE POWER TOOL BE CRACKED OR DEFORMED DO NOT USE IT Since cracked or deformed parts may lead to an operator receiving an electric shock do not use su
12. onents to dissolve PARTICULAR PRECAUTIONS ON DEMOLITION HAMMER In addition to the precautions mentioned above following particular precautions for this demolition hammer should be followed 1 Use earplugs to keep your ears noise free while working 2 Wear protective shoes to protect your feet 3 Properly set the bit holder 4 Always hold the body handle and side handle of the power tool firmly Otherwise the counterforce produced may result in inaccurate and even dangerous operation Since the bit becomes very hot during operation do not touch it because you are burnt At the start of work confirm screw tightening 7 When working at a highly elevated location pay attention to articles and persons below p gt pi SAVE THESE INSTRUCTIONS AND MAKE THEM AVAILABLE TO OTHER USERS OF THIS POWER TOOL NAME OF PARTS Handle Switch trigger Tail cover Front cover Hexagon socket hd bolt M5 x 10 Housing cover Housing Retainer Side handle MODE pA Bolt Spring lock washer M8 x 30 Fig 1 NOTE Install the side handle with the supplied 4 bolts and 4 spring lock washers Tighten the bolts securely with the supplied wrench SPECIFICATIONS Motor Single Phase Series Commutator Motor Power Source Single Phase 115V AC 60 Hz Current 12 2A Full Load Impact Rate 850 min Weight 68 4 Ibs 31 0 kg ACCESSORIES CAUTION Only following genuine accessories for this power tool should be used
13. r as it is too heavy to move by hand IT a ni f NOTE When removing the accessory such as a bull point a cutter etc follow the above procedure in reverse order OPERATION 1 Pull the trigger switch after applying the tip of the bit to the crushing position In some cases it is necessary to punch the tip of the bit against the crushing position forcibly in order to begin the striking stroke This is not due to malfunction of the power tool It means that the safe guard mechanism against no load striking is working 2 Operate this demolition hammer by utilizing its own weight The performance will not be better even if it is pressed or thrust forcibly against the work surface Hold this demolition hammer with a force just sufficient to counteract the reaction CAUTION Sometimes the power tool does not begin the striking stroke even when the motor rotates because oil has become thick If the power tool is used at low temperatures or if it is used after a long idle time this demolition hammer should be kept running for about five minutes in order to warm it up HOW TO REPLACE GREASE This Demolition Hammer is full air tight construction to protect against dust and to prevent lubricant leakage Therefore this Demolition Hammer can be used without lubrication for long periods Replace the grease as described below Grease Replacement Period After purchase replace grease after every 6 months of usage Ask for grease repla
14. rmance Follow instructions for lubricating and changing accessories Inspect tool cords periodically and if damaged have repaired by the authorized service center Inspect extension cords periodically and replace them if damaged Keep handles dry clean and free from oil and grease 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 DISCONNECT POWER TOOLS When not in use before servicing and when changing accessories such as blades bits cutters REMOVE ADJUSTING KEYS AND WRENCHES Form habit of checking to see that keys and adjusting wrenches are removed from the power tool before turning it on AVOID UNINTENTIONAL STARTING Don t carry a plugged in the power tool with finger on switch Be sure switch is off when plugging in OUTDOOR USE EXTENSION CORDS When the power tool is used outdoors use only extension cords intended for use outdoors and so marked STAY ALERT Watch what you are doing Use common sense Do not operate the power tool when you are tired CHECK DAMAGED PARTS Before use of the power tool a guard or other part should be carefully checked to determine that it will operate properly and perform its intended function Check the alignment of moving parts binding of moving parts breakage of parts mounting and any other conditions that may affect its operation A guard or other part that is damaged should be properly repaired or replaced by an authorized service ce
15. with a soft cloth lightly dampened with soapy water 32 WHEN REPLACING A COMPONENT PART ADOPT THE SAME TYPE When replacing a component part with a new one adopt the same type of new part Also never attempt to repair the power tool yourself Bring it to an authorized service center for repair SERVICE AND REPAIRS All quality tools will eventually require servicing or replacement of parts due to wear from normal use These operations should ONLY be performed by an AUTHORIZED SERVICE CENTER REPLACEMENT PARTS When servicing use only identical replacement parts POLARIZED PLUGS To reduce the risk of electric shock this equipment has a polarized plug one blade is wider than the other This plug will fit in a polarized outlet only one way If the plug does not fit fully in the outlet reverse the plug If it still does not fit contact a qualified electrician to install the proper outlet Do not change the plug In any way EXTENSION CORD Make sure your extension cord is in good condition When using an extension cord be sure to use one heavy enough to carry the current the power tool will draw An undersized cord will cause a drop in line voltage resulting in loss of power and overheating Table below shows the correct size to use depending on cord length and nameplate ampere rating If in doubt use the next heavier gage The smaller the gage number the heavier the cord MINIMUM GAGE FOR CORD SETS Total Length of Cord in Feet
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