HAMMER Model H 45MRY - hitachi
Contents
1. 4 1 3 Self chiseling Good feeling Thanks to the computer simulated optimum hammering characteristics the quantity of body jumping is less than that of the current Model H 45MR and the working tool smoothly penetrates into the workpiece with a light pressing force The Model H 45MRY realizes quicker self chiseling with better feeling Demolished amount About 20 up Maximum compressed air force piston force About 3296 down Quantity of body jumping About 2496 down 4 1 4 Vibration reduction mechanism The Model H 45MRY is equipped with Hitachi s own dynamic damper that absorbs vibration from the main body by means of resonance of a leaf spring and a spindle As a result the vibration level of the Model H 45MRY is remarkably lower than the current Model H 45MR 4 1 5 Newly designed vibration absorbing handle The Model H 45MRY is equipped with the new vibration absorbing mechanism based on the same Hitachi s own vibration absorbing mechanism as the current Model H 45MR that absorbs vibration by rolling and compressing the four cylindrical rubber cushions on the inclined surface In the new vibration absorbing mechanism the shaft fixed to the handle is turned in conjunction with the handle movement and the four cylindrical rubber cushions are rolled and compressed to absorb vibration more efficiently The cushion effect not only greatly reduces vibration but also maintains good operability 4 1 62. 98 Hitachi Power Tools LIST NO E495 ELECTRIC TOOL PARTS LIST HAMMER 2006 8 3 Model 45MRY E1 PARTS H 45MRY CODE NO DESCRIPTION REMARKS 315 529 FRONT 320 802 GRIP A 320 803 RING 320 804 NEEDLE HOLDER 320 806 SPRING A 317 088 RETAINING RING 042 320 810 BALL HOLDER 320 807 GRIP B 320 808 GRIP C 959 150 STEEL BALL 06 35 10 PCS 981 942 SEAL LOCK HEX SOCKET HD BOLT M6X25 326 494 FRONT COVER 990 067 O RING 1AS 50 980 879 O RING S 34 313 421 NEEDLE ROLLER D8X20 320 805 RETAINER SLEEVE 322 528 DAMPER 326 379 HAMMER HOLDER A 319 572 O RING S 25 326 380 RING B 326 381 SECOND HAMMER 326 662 DAMPER 326 495 SLEEVE A 320 814 HAMMER HOLDER B 320 815 DAMPER 326 382 HAMMER HOLDER 326 383 STRIKER 325 297 O RING I D 27 2 326 496 CYLINDER 326 497 SLIDE SLEEVE 326 498 SPRING B 325 297 O RING I D 27 2 324 917 PISTON PIN 326 384 PISTON 326 385 CONNECTING ROD 939 540 RETAINING RING FOR 010 SHAFT 10 PCS 930 511 FEATHER KEY 4X4X10 990 079 SEAL LOCK HEX SOCKET HD BOLT M5X16 326 500 CRANK COVER 326 501 O RING 326 499 CRANK SHAFT 948 391 RETAINING RING FOR D40 HOLE 996 363 O RING S 40 620 3DD BALL BEARING 6203DDCMPS2L 310 119 OIL SEAL 326 502 CYLINDER CRANK CASE 986 940
3. Cylinder crank case Needle roller Leaf spring Spring base Needle roller Needle roller Mount the assembly of the Leaf Spring 51 Weight A 59 and Weight B 58 to the Cylinder Crank Case 47 Then mount Spring Bumper A 52 and Washer M4 5 53 to the Cylinder Crank Case 47 in this order and fix it with the Seal Lock Hex Socket Hd Bolt M4 x 10 54 At this time check that the Leaf Spring 51 is fitted in the center of the Needle Rollers 55 mounted to the Spring Base 115 and the Leaf Spring 51 is curved to the housing Apply grease to Spring Bumper B 75 and mount it to the Back Cover 76 being careful of the mounting direction To replace Rubber Sheet A 74 sufficiently degrease the adhering surface of the Back Cover 76 and adhere Rubber Sheet A 74 securely Mount the Back Cover 76 to the Cylinder Crank Case 47 and the Housing Ass y 114 At this time check that Spring Bumper B 75 and Rubber Sheet A 74 are adhered and the Needle Rollers 55 are mounted to the Cylinder Crank Case 47 and the Spring Base 115 Fig 27 Spring bumper A Needle roller Washer Seal lock hex socket hd bolt M4 x 10 Rubber sheet A Spring bumper B Leaf spring Spring base 95 Lubrication Apply special grease grease for hammer and hammer drill to the inner circumference of the Connecting Rod 36 O rings 1 0 27 2 29 in the Striker 28 and in
4. 302 089 TAPPING SCREW W FLANGE D5X20 BLACK 326 485 991 711 HANDLE A B SET DISTANCE PIECE B 991 690 SEAL LOCK HEX SOCKET HD BOLT M5X12 307 028 TAPPING SCREW W FLANGE D4X25 BLACK 310 124 HANDLE DAMPER 326 377 326 479 HANDLE SHAFT HOLDER 310 124 HANDLE DAMPER 310 123 TRANSATORY UNIT 306 143 SWITCH B 1P SCREW TYPE W LOCK 949 423 980 063 WASHER M4 10 PCS TERMINAL FOR CORD 326 541 VINYL TUBE I D 9 5XT0 56X85 326 509 INTERNAL WIRE L75 325 566 NOISE SUPPRESSOR 317 492 994 190 SUPPORT B INTERNAL WIRE 984 750 TAPPING SCREW W FLANGE D4X16 960 266 CORD CLIP 981 987Z CORD CLIP FOR SUI 959 140 938 307 CONNECTOR 50091 10 PCS PILLAR TERMINAL AN eet N N N Rp ALTERNATIVE PARTS PARTS H 45MRY CODE NO DESCRIPTION REMARKS 959 141 CONNECTOR 50092 10 PCS 953 327 CORD ARMOR D8 8 500 390Z CORD 500 4547 CORD 500 4467 CORD 500 391Z CORD 321 320 FAN GUIDE 953 174 HEX HD TAPPING SCREW D5X55 340 681C STATOR ASS Y 110V 340 681E STATOR ASS Y 220V 230V 930 703 BRUSH TERMINAL 930 804 TERMINAL M4 0 10 PCS 982 631 WASHER A 608 VVM BALL BEARING 608VVC2PS2L 326 484 BEARING
5. H 45MRY Hitachi Power Tools DEMOLITION HAMMER TECHNICAL DATA H 45MRY SERVICE MANUAL LIST No E495 Oct 2006 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT REMARK Throughout this TECHNICAL DATA AND SERVICE MANUAL symbols are used in the place of company names and model competitors The symbols utilized here are as follows names of our Competitors Symbols Utilized Company Name Model Name C MAKITA HMO860C B BOSCH GSH5E E CONTENTS Page T PRODUCT NANE uu R 1 2 MARKETING OBJECTIVE anali aaa SOC Dana dedat ani za aaa sata satana 1 Bi APPLICATIONS inca 1 SELLING POINTS 2 4 1 Selling Point Descriptions i 3 5 SPECIFICATIONS ul u 5 5 1 Optional ACCESSES i 6 6 COMPARISONS WITH SIMILAR PRODUCTS iii 9 6 1 Specification Comparison i oceanic a aa d ord edu i ta aa td ia a 9 6 2 Demolition Performance 9 7 PRECAUTIONS IN SALES PROMOTION U nennen nnne nnnm nnns nn nnn 10 7 1 Handling Instruction uuu lla
6. SEAL LOCK HEX SOCKET HD BOLT M6X45 998 471 SOCKET HD BOLT W FLANGE M5X12 326 503 HOOD 326 386 SPRING 326 375 SPRING BUMPER 2 ALTERNATIVE PARTS 8 06 AA p M Ji p M M M Ce M a N ee Cree Cre CS Se N Na PARTS CODE NO 326 477 DESCRIPTION WASHER M4 5 REMARKS H 45MRY 878 356 SEAL LOCK HEX SOCKET HD BOLT M4X10 878 418 NEEDLE ROLLER 317 245 SEAL LOCK HEX SOCKET HD BOLT M5X22 326 515 326 508 RUBBER SHEET C WEIGHT B 326 507 WEIGHT A 320 830 FIRST GEAR 939 299 NEEDLE BEARING M661 326 510 872 767 GEAR COVER ASS Y O RING S 32 INCLUD 61 620 1DD BALL BEARING 6201DDCMPS2L 302 429 DUST WASHER B 321 640 FAN 360 571C 360 571E ARMATURE ASS Y 110V ARMATURE ASS Y 220V 230V INCLUD 66 INCLUD 66 317 107 BOLT M8 317 106 HANDLE HOLDER B 317 105 HANDLE HOLDER A 320 635 317 108 BAND GRIP 317 103 SIDE HANDLE ASS Y INCLUD 68 72 326 487 RUBBER SHEET A 326 376 SPRING BUMPER B 326 505 326 378 BACK COVER BELLOWS 306 061 SEAL LOCK HEX SOCKET HD BOLT M5X30 NAME PLATE
7. A highly reliable mechanism for prevention of idle hammering and shock absorbing mechanism results in prolonged service life and comfortable operation The Model H 45MRY has air holes located at the position unaffected by the rebound of the striker at no load The air holes are opened and closed by the movement of the slide sleeve provided around the cylinder that interlocks with the tool and the second hammer to prevent idle hammering This mechanism securely prevents idle hammering even in wall hammering works or even if a tool that can cause great rebound on the striker such as a cutter is used Thanks to the highly reliable mechanism for prevention of idle hammering the service life of the Model H 45MRY is prolonged and hammering works requiring much attention not to break the surroundings can be efficiently performed with the Model H 45MRY At the moment of releasing the bull point from the concrete by moving the main body up the second hammer contacts hammer holder A and the cushion damper A provided between hammer holder A and the front cover absorbs the hammering force of the second hammer Thus the Model H 45MRY has greater durability than the similar products 4 1 7 D type side handle with adjustable mechanism for 360 rotation plus positioning from front to rear The D type side handle can be adjusted by 360 rotation and also allows convenient operation from front to rear This side handle has a two layer plastic construction integr
8. Agents Vibration Directive that requires employers to take action to reduce exposure of workers to vibration below the exposure limit values enforced in July 2005 The main features of the Model H 45MRY are as follows 1 Lowest vibration level in the class thanks to the dynamic damper with a leaf spring and the new vibration absorbing handle 2 High chipping and demolishing performance with low vibration and noise level 3 Self chiseling Good feeling 4 A highly reliable mechanism for prevention of idle hammering and shock absorbing mechanism results in prolonged service life and comfortable operation b D type side handle with adjustable mechanism for 360 rotation plus positioning from front to rear 6 Soft touch grip for easier handling 7 Simply turning method variable lock mechanism for easy working angle adjustment of chisels etc 3 APPLICATIONS e Demolishing and chiseling of concrete e Edging gravel road digging compacting and tamping grooving cutting stripping and roughing etc 4 SELLING POINTS e Lowest vibration level in the class e High chipping and demolishing performance with low vibration and noise level e Self chiseling Good feeling A highly reliable mechanism for prevention of idle hammering and shock absorbing mechanism results in prolonged service life and comfortable operation Newly designed vibration absorbing handle Simply t
9. the Piston 35 outer circumference of the Retainer Sleeve 16 sliding portion of the Second Hammer 21 Oil Seal 46 Damper A 17 Damper B 25 Damper C 22 inner circumference of the Slide Sleeve 31 Hammer Holder B 24 Hammer Holder C 27 and the end surface of Spring A 5 Seal 27 g of the special grease into the Cylinder Crank Case 47 the Connecting Rod 36 side Apply Hitachi Motor Grease No 29 to the Needle Bearing M661 61 pinion portion of the Armature Ass y 67 Needle Roller D8 x 20 15 and Steel Ball D6 35 10 Seal 20 g of the Hitachi Motor Grease No 29 into the Cylinder Crank Case 47 the First Gear 60 side Oil seals Be very careful not to damage the O ring 1AS 50 13 on the Front Cover 12 O ring S 34 14 in the Front Cover 12 O ring S 25 19 in Hammer Holder 18 O ring 41 in the Crank Cover 40 O rings 1 0 27 2 29 in the Striker 28 and in the Piston 35 O ring S 40 44 and Oil Seal 46 in the Cylinder Crank Case 47 and O ring S 32 63 in the Gear Cover Ass y 62 9 1 3 Screw locking agent TB1401 Apply screw locking agent TB1401 to all hex socket hd bolts M4 M5 and M6 CAUTION If bolts are loosened by vibration they could cause damage to the hammer body Ensure without fail that screw locking agent is applied to the threaded portions of the bolts prior to reassembly 9 1 4 Tightening torque 1 Attached bolts of the fr
10. 0 40 60 80 100 78 0 5 oc At rated voltage Do 9 oo ES 67 8 B 67 4 Fig 1 7 PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model H 45MRY Demolition Hammer by all of our customers it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions and fully understands the meaning of the precautions listed on the Caution Plate attached to each tool 7 1 Handling Instructions Although every effort is made in each step of design manufacture and inspection to provide protection against safety hazards the dangers inherent in the use of any electric tool cannot be completely eliminated Accordingly general precautions and suggestions for the use of electric power tools and specific precautions and suggestions for the use of the Demolition Hammer are listed in the Handling Instructions to enhance the safe efficient use of the tool by the customer Salespersons must be thoroughly familiar with the contents of the Handling Instructions to be able to offer appropriate guidance to the customer during sales promotion 7 2 Grease Replacement The striking portion and the speed reduction portion of the Model H 45MRY respectively use different types of grease Grease replacement is required if the unit is disassembled for maintenance or O rings become damaged and worn as des
11. HOLDER 326 481 HOUSING ASS Y 326 506 SPRING BASE 935 829 BRUSH CAP 999 073 CARBON BRUSH AUTO STOP TYPE 1 PAIR 971 001 BRUSH HOLDER 938 477 HEX SOCKET SET SCREW M5X8 326 504 TAIL COVER 302 089 TAPPING SCREW W FLANGE D5X20 BLACK 326 488 COVER A CORD ARMOR D8 8 CORD ARMOR D8 8 FOR GBR 110V CORD ARMOR D8 8 FOR SUI INCLUD 109 INCLUD 109 N NIN N N gt N N A STANDARD ACCESSORIES CODE NO DESCRIPTION REMARKS 313 471 BULL POINT SDS MAX 280L 326 511 CASE PLASTIC OPTIONAL ACCESSORIES CODE NO DESCRIPTION REMARKS 981 840 GREASE A FOR HAMMER HAMMER DRILL 30G 308 471 GREASE FOR HAMMER HAMMER DRILL 70G 980 927 GREASE FOR HAMMER HAMMER DRILL 500G 313 472 BULL POINT SDS MAX 400L 313 473 COLD CHISEL SDS MAX 280MM 313 474 COLD CHISEL SDS MAX 400MM 313 475 CUTTER SDS MAX W50X400L 313 476 SCOOP SDS MAX 400L 313 478 RAMMER SDS MAX 150MM X 150MM 313 477 BUSHING TOOL SDS MAX 611 313 479 SHANK SDS MAX FOR RAMMER BUSHING TOOL 4 ALTERNATIVE PARTS Printed in Japan 8 06 060803N dA AA AAA La Q Hitachi Koki Co Ltd
12. Retainer Sleeve 16 from the Front Cover 12 Fig 14 Ring B Front cover Front cover Pa Retainer sleeve Hammer holder A N Fig 14 Fig 15 Removal of the piston and the striker Remove the Seal Lock Hex Socket Hd Bolt M6 x 25 11 from the Front Cover 12 Then the Front Cover 12 Retainer Sleeve 16 Second Hammer 21 Hammer Holder B 24 Damper B 25 Hammer Holder C 27 Damper C 22 and Sleeve A 23 can be removed from the Cylinder Crank Case 47 The Cylinder 30 Striker 28 Slide Sleeve 31 and Spring B 32 are remained in the Cylinder Crank Case 47 Lightly tap the Front Cover 12 side of the Cylinder Crank Case 47 with a plastic hammer to remove the Cylinder 30 Then the Slide Sleeve 31 and Spring B 32 can be removed from the Cylinder Crank Case 47 The Striker 28 can be removed by tapping the Cylinder 30 lightly with a plastic hammer The Piston 35 is remained in the Cylinder Crank Case 47 Remove the Seal Lock Hex Socket Hd Bolt 5 x 16 39 from the Crank Cover 40 to remove the Crank Cover 40 from the Cylinder Crank Case 47 Remove the Retaining Ring for D10 Shaft 37 using a retaining ring puller and remove the Connecting Rod 36 from the Crank Shaft 42 18 Removal of the first gear and the crank shaft Degrease the Connecting Rod 36 side and the First Gear 60 side of the Cylinder Crank Case 47 Place the Cylinder Crank Ca
13. a 10 7 2 Grease Replacement RIEN 10 3 Osring Replacement unire 10 8 REFERENCE INFORMATION ie ni aaa aa cc cu e 11 8 1 Strikinig Operatiori et 11 8 2 Dynamic Damper with Leaf Spring ie 12 8 3 Vibration proof Handle thanks to the Transatory Unit and the Neidhardt Spring 12 8 4 Idling proof Mechanism iii 13 8 5 Shock absorbing Mechanism sisse nenea entente aa e nennen 14 8 6 Sealed and Dustproof Construction u u A u u uq nnne nnn nnns 14 8 JooLRetamert i m 15 8 8 Adjusting Mechanism for the Tool Swivel Angle mmm eee ana ana 15 8 9 Side Handle ia it a c a d a e n e le a ea n tt i i at 16 9 REPAIR GUIDE 17 9 1 Precautions and Suggestions for Disassembly and Reassembly of the Main Body 17 10 STANDARD REPAIR TIME UNIT SCHEDULES nnne 28 Assembly Diagram for H 45MRY 1 PRODUCT NAME Hitachi Demolition Hammer Model H 45MRY 2 MARKETING OBJECTIVE The Model H 45MRY is an upgraded version of the current Model H 45MR that features the use of maker B s SDS max shank tools The performance durability and operability are greatly improved In addition the vibration level of the Model H 45MRY is low enough to meet the requirements of the EU Physical
14. a det vtov AUN E De Ea pe imbre ia da su sufre TII Dia z n 1 pc Plastic tool Case s nennen i 1 pc 5 1 Optional Accessories 1 Demolishing work lt gt 2 Grooving and chiseling work D 3 Cutting and stripping work Asphalt cutting etc 1 Bull point SDS max shank type Overall length Code No 280 mm 11 1 32 313471 400 mm 15 3 4 313472 1 Cold chisel SDS max shank type Overall length Code No 280 mm 11 1 32 313473 400 mm 15 3 4 313474 1 Cutter SDS max shank type Width Overall length Code No 50 mm 2 400 mm 15 3 4 313475 4 Digging Substitute pick ax 1 Scoop SDS max shank type Overall length Code No 400 mm 15 3 4 313476 5 Roughing surface work 1 Bushing tool Code No 313477 6 Tamping work 2 Shank SDS max shank type Overall length Code No 220 mm 8 21 32 313479 0 1 Rammer Code No 313478 150 mm x 150 mm 2 Shank SDS max shank type Overall length Code No 220 mm 8 21 32 313479 7 Grease for hammer and hammer drill 500 g 1 1 Ibs Can 70 g 2 5 oz Tube 30 g 1 oz Tube Code No 980927 Code No 308471 Code No 981840 NOTE Code numbers listed abo
15. aft and the connecting rod which in turn cause the piston to reciprocate inside the cylinder As the piston reciprocates the changing air pressure inside the air chamber between the piston and the striker causes the striker to continuously strike against the end of the second hammer At the same time the air cushion effect within the air chamber absorbs the impact of the striker Should the air escape from the air chamber the air cushion effect would cease and the impact energy would not be absorbed Accordingly the O rings mounted on the striker and the piston play an extremely important role in sealing air within the air chamber 8 2 Dynamic Damper with Leaf Spring i V Dei e weig The vibration caused by hammering operation of the Model H 45MRY is transmitted to the cylinder crank case back cover housing and finally to the weight through the leaf spring supporting portion Then the weight moves in the reverse direction of the transmitted vibration to negate the vibration of the Vibration of the main body Vibration of main body Fig 3 the weight Fig 3 8 3 Vibration proof Handle thanks to the Transatory Unit and the Neidhardt Spring The Model H 45MRY has the vibration proof handle equipped with the transatory unit and the Neidhardt spring O Structure of the transatory unit The main body cylinder crank case is connected to Cylindrical rubbers Handle damper handle damper 4 pcs retaining materi
16. al the upper handle through four cylindrical rubbers handle side handle dampers These rubbers are rolled and compressed on the inclined surface to absorb the Slotted groove vibration Since the transatory unit has nonlinear Spring characteristics the spring constant is lower Cylindrical than the conventional shearing type vibration DS proofing structure Thus the Model H 45MRY can provide high vibration proofing effect with good cushioning properties The joint of the slotted groove Handle damper retaining material and the cylindrical convex is provided at the center to Cylinder crank case prevent the handle from being pulled out by twisting or pulling in hammering operation Fig 4 Vibration proof rubbers E 4 Pressing force of the main SI body Handle side Rolled and compressed Main body side Reaction wj a At no load b At full load Fig 4 Edo O Structure of the Neidhardt spring Compressed by turning The main body back cover is connected to the lower handle through four cylindrical rubbers handle dampers The shaft fixed to the handle is turned in Turning direction conjunction with the handle movement and the of the handle rubbers are rolled and compressed to absorb the vibration The Neidhardt spring prevents the handle from moving horizontally Thus the Model H 45MRY can provide high vibration proofing effect without Rebound hindering the operability by twisting In addition th
17. al molding made of nylon resin as the base and soft resin around it for a comfortable cushion grip 4 1 8 Soft touch grip for easier handling The double layer molded handle consists of a nylon resin base covered with a soft plastic layer to ensure a soft touch and firm non slip grip of the handles 4 1 9 Simply turning method variable lock mechanism for easy working angle adjustment of chisels etc The tool swivel angle can be easily changed in 12 steps by pushing out grip B ahead and then turning grip A 5 SPECIFICATIONS Power source Single phase AC 50 60 Hz Voltage 110 V 280 V Motor type AC single phase series commutator motor Insulation structure Double insulation Enclosure Materials Aluminum alloy die casting Cylinder crank case Nylon resin Handle tail cover back cover hood crank cover Polycarbonate resin Housing Paint Green gunmetallic silver black silver Switch Trigger switch with stopper Type of handles D shaped handle and side handle Full load current 9 1A 110 V 4 4 A 230 V Power input 950W Striking speed No load 4 000 Full load 3 000 min Weight Product 5 9 kg 13 0 Ibs Excluding cord and side handle Packed 12 4 kg 27 3 Ibs Packaging Corrugated cardboard box with plastic tool case Standard accessories e Bull point 280 mm 11 1 32 CERRI I 1 pc Side handle Locri sa nens ee aet ree E
18. ank Case 47 Mount the Retaining Ring for D10 Shaft 37 using a retaining ring puller Fig 20 Piston pin Retaining ring Connecting rod Crank pin portion D8 hole Mark O ring Piston Cylinder crank case Fig 20 Mounting the cylinder Insert the concave side of the Slide Sleeve 31 into the Cylinder 30 Insert the assembly of the Striker 28 and the O ring 1 0 27 2 29 into the Cylinder 30 Fig 21 Concave Slide sleeve Cylinder Striker O ring Fig 21 51 Move the crank pin of the Crank Shaft 42 then move the Piston 35 to the top dead center Insert Spring B 32 into the cylinder case of the Cylinder Crank Case 47 then insert the assembly of the Cylinder 30 Slide Sleeve 31 and Striker 28 into the Cylinder Crank Case 47 Fig 22 Spring B Striker Cylinder Slide sleeve Cylinder crank case Fig 22 e Mounting the fan guide Mount the Fan Guide 106 to the Housing Ass y 114 paying attention to the direction of the 0 05 convex line Fig 23 0 05 convex line Fan guide rd Housing ass y 59 Mounting the handle shaft and handle A Push the Holder 88 in the Back Cover 76 by hand At this time check that the clearance of the Holder 88 does not protrude from the main body and the Holder 88 does not protrude from the end surface of the Back Cover 76 Check that the convex mark of the Back Cover 76 aligns with the convex mar
19. c strength AC 4 000 V 1 minute with no abnormalities 220V 240V 9 1 7 No load current value and 110 V for U K products After no load operation for 30 minutes the no load current value should be as follows Voltage V 110 230 Current A Max 3 8 2 1 57 10 STANDARD REPAIR TIME UNIT SCHEDULES MODEL Variable Fixed 10 20 30 40 50 60 min General Assembly Work Flow Handle A B Set Transatory Unit Switch B Cord Handle Damper Handle Damper Handle Shaft Holder Tail Cover Crank Cover O ring Front Cap Grip A Needle Holder Ball Holder Grip B Grip C Front Cover O ring O ring Retainer Sleeve Spring A Damper A Hammer Holder A O ring Second Hammer Damper B Damper A Hammer Holder B Hammer Holder C Back Cover Leaf Spring Spring Bumper A Rubber Sheet C Weight B Weight A Spring Bumper B Striker O ring Piston Piston Pin Connecting Rod O ring Gear Cover Ass y Needle Bearing A Armature Ass y Ball Bearing 6201DD Ball Bearing 608VV Dust Washer B Washer A Bearing Holder O ring Crank Shaft Feather Key Ball Bearing 6203DD Oil Seal First Gear O ring RR PP a Cylinder Sleeve Spring B Cylinder Housing Ass y Stator Ass y Cylinder Crank Case
20. cribed in 7 3 The striking portion uses special grease If the striking portion inside the cylinder crank case is disassembled thoroughly remove all of the old grease from each On reassembly fill 27 0 g 0 9 oz of new grease in the crank case connecting rod side Do not exceed the designated amount of grease Excessive grease may cause reduced striking performance The speed reduction portion inside the gear cover uses Hitachi Motor Grease No 29 Code No 930035 The proper supply volume is 20 g 0 7 oz Never use the striking portion special grease in the speed reduction portion Special grease would leak into the motor portion and cause subsequent trouble 7 3 O ring Replacement The O rings mounted on the striker and the piston are extremely important to ensure adequate sealing of the air pressure Although the O rings are made of special rubber to give them a long service life they do nonetheless become worn and should be replaced by new ones periodically depending on frequency of use of the tool With average use it is recommended that the O rings be replaced at least every six months to ensure maximum effectiveness 10 8 REFERENCE INFORMATION Structure rank cover Connecting rod Sia Sare Striker O rings Crank shaft ERE iii Za RE Cylinder Air chamber Armature Fig 2 8 1 Striking Operation The rotation of the armature is transferred to the crank sh
21. e handle is prevented from being pulled out Fig 5 Fig 5 8 4 Idling proof Mechanism When the bull point is released from the concrete surface the slide sleeve and the second hammer are forcibly moved to the position illustrated in Fig 6 by spring B and the striker moves out of striking position When this occurs the air holes located at the position unaffected by the rebound of the striker at no load are opened and the pressure within the air chamber remains unchanged even though the piston continues to reciprocate thereby preventing striking operation Second hammer Slide sleeve Striker Forward movement of second hammer amp striker Air chamber Air hole Fig 6 13 8 5 Shock absorbing Mechanism At the instance of releasing the bull point from the concrete by moving the main body up the second hammer contacts hammer holder A as shown in Fig 7 then the cushion damper A provided between hammer holder A and the front cover absorbs the striking force of the second hammer Thus the durability of the Model H 45MRY is greatly increased because the second hammer does not strike the tool retainer directly Second hammer Hammer holder A Fig 7 8 6 Sealed and Dustproof Construction The oylinder crank case is sealed by five O rings and an oil seal which serve to prevent leakage of the grease as well as to prevent dust and dirt from entering the mechanism Fig 8 O ring Sing C
22. in the arrow direction as shown in Fig 12 and remove the Front Cap 1 since the Front Cap 1 is made of rubber and engaged firmly with the Retainer Sleeve 16 pull it strongly to remove This allows Grip A 2 to be separated from the Retainer Sleeve 16 Front Cap 1 Grip A 2 Fig 12 Ball holder Needle roller D8 x 20 2 pcs Ring n LAE PI Front cover Needle holder Retainer sleeve Steel ball 4 pcs Retaining ring Fig 13 Remove the Ring 3 by means of a snap ring remover then the Needle Holder 4 two Needle Rollers D8 x 20 15 and Spring A 5 can be removed from the Retainer Sleeve 16 Remove the Retaining Ring D42 6 by means of a snap ring remover then the Ball Holder 7 Grip B 8 and four Steel Balls D6 35 10 can be removed from the Front Cover 12 Furthermore remove the Retaining Ring D42 6 by means of a snap ring remover then Grip C 9 can be removed from the Front Cover 12 Fig 13 47 Removal of hammer holder A damper A and retainer sleeve Remove the Seal Lock Hex Socket Hd Bolt M6 x 25 11 from the Front Cover 12 Then the Front Cover 12 and the Retainer Sleeve 16 can be removed from the Cylinder Crank Case 47 Insert a small flat blade screwdriver into the groove of the Front Cover 12 and remove Ring B 20 Then Hammer Holder A 18 and Damper A 17 can be removed from the Front Cover 12 Remove the Ring 3 to remove the
23. jig of 44 mm outside dia and a hand press At this time check that Ring B 20 is fitted in the groove of the Front Cover 12 securely Fig 18 Mounting the first gear and the crank shaft Mount the O ring S 40 44 to the Cylinder Crank Case 47 Press fit the Ball Bearing 6203DDCMPS2L 45 and mount the Retaining Ring for D40 Hole 43 using a retaining ring puller Press fit the Crank Shaft 42 in the Ball Bearing 6203DDCMPS2L 45 and mount the Oil Seal 46 Put one Feather Key 4 x 4 x 10 38 in the groove of the Crank Shaft 42 Supporting the flat portion of the Crank Shaft 42 with a proper steel bar press fit the First Gear 60 with a proper jig Before press fitting check that the key groove of the Feather Key 4 x 4 x 10 38 is aligned with the key groove of the First Gear 60 Fig 19 Feather key Suitable tool First gear Oil seal Ball bearing Ve O ring Retaining ring for D40 hole Crank shaft Cylinder crank case Steel bar Fig 19 20 e Mounting the piston Insert the Piston Pin 34 into the 8 mm dia hole marked of the Piston 35 and the Connecting Rod 36 then press fit it Mount the O ring 1 0 27 2 33 to the Piston 35 At this time do not protrude the Piston Pin 34 from the outside of the Piston 35 Move the crank pin of the Crank Shaft 42 to the bottom dead center and insert the piston ass y into the Crank Shaft 42 from the cylinder case of the Cylinder Cr
24. k of the Handle Shaft 87 Then mount the Handle Shaft 87 and push the four Handle Dampers 86 in the clearances between the Holder 88 and the Handle Shaft 87 by hand being careful not to protrude the Handle Dampers 86 from the end surface of the Back Cover 76 Fig 24 Convex mark Holder J 4 Va 22 Holder damper Handle shaft Clearance Fig 24 To mount Handle A B Set 81 turn the Handle Shaft 87 by about 10 and fit the Transatory Unit 90 and the Handle Shaft 87 in Handle A B Set 81 together 028 e Mounting the leaf spring Sandwich the Leaf Spring 51 between Weight A 59 and Weight B 58 and fix it with the Seal Lock Hex Socket Hd Bolt M5 x 22 56 Leaf spring o Weight B Sufficiently degrease the adhering surface of Weight B 58 and adhere Rubber Sheet C Weight A 57 securely Be careful that the Leaf Spring 51 is curved to Weight B 58 At this time do not misalign Weight A 59 and Weight B 58 and do not turn the Leaf Spring 51 Fig 25 Seal lock hex socket Rubber sheet C nei Curved portion Fig 25 Mount the Spring Base 115 to the Housing Ass y 114 being careful of the mounting direction Mount one Needle Roller 55 to the Cylinder Crank Case 47 and three Needle Rollers 55 to the Spring Base 115 Before mounting apply grease to the Needle Rollers 55 to avoid being removed Fig 26
25. ont cover Hex socket hd bolts M6 x 25 2 Tapping screw D4 3 Tapping screw D5 4 Hex socket hd bolts M6 x 45 na a a 5 Attached bolts of the crank cover Hex socket hd bolts M5 x 16 6 Attached bolts of the handle Hex socket hd bolts M5 x 12 7 Attached bolts of the back cover Hex socket hd bolts M5 x 30 8 Attached bolts of the leaf spring Hex socket hd bolts M5 x 22 9 Attached bolts of the hood Hex socket hd bolts M5 x 12 10 Attached bolts of the leaf spring Hex socket hd bolts M4 x 10 13 7 1 96 N m 140 20 kgf cm 121 5 17 4 in lbs 1 96 0 49 N m 20 5 kgf cm 17 4 4 3 in lbs 2 94 0 49 N m 30 5 26 0 4 3 in lbs 9 8 0 98 N m 100 10 kgf cm 86 8 8 7 in lbs 1 96 417 4 7 84 5 N m 80 6 69 44 in Ibs 4 9 5 N m 50 kgf cm 43 4 1 in Ibs 3 92 0 49 N m 40 5 kgf cm 34 7 4 3 in lbs 7 84 196 N m 80 120 kgf cm 69 4 6 3 92 0 49 N m 40 5 kgf cm 34 7 4 3 in lbs 4 41 0 49 N m 45 5 kgf cm 39 1 4 3 in lbs 98 9 1 5 Internal wiring e Wiring diagram for products with noise suppressor 9 1 6 Insulation tests Stator Stator sla Motus a Connector Switch Pillar terminal On completion of disassembly and repair measure the insulation resistance and the dielectric strength Insulation resistance 7 M Q or more with DC 500 V megohm tester Dielectri
26. se 47 on a workbench facing the Connecting Rod 36 side downward Apply light pressure on the end surface of the Crank Shaft 42 with a hand press and pull out the Retaining Ring for D40 Hole 43 that fixes the Ball Bearing 6203DDCMPS2L 45 from the groove of the Cylinder Crank Case 47 Before removal move the crank pin of the Crank Shaft 42 as shown in Fig 16 so that the hole of the Retaining Ring for D40 Hole 43 can be seen Crank Shaft Oylinder crank case Hole of the Retaining Ring for D40 Hole 43 Fig 16 Place the Cylinder Crank Case 47 on a workbench facing the Connecting Rod 36 side downward Apply light pressure on the end surface of the Crank Shaft 42 with a hand press to remove the First Gear 60 and the Crank Shaft 42 Fig 17 Before removal be sure to check that the Retaining Ring for D40 Hole 43 is removed from the groove of the Cylinder Crank Case 47 Apply pressure on the end surface of the crank shaft with a hand press Workbench Fig 17 19 9 1 2 Reassembly Reassembly can be accomplished by following the disassembly procedure in reverse However special attention should be given to the following items Mounting hammer holder A Set the Retainer Sleeve 16 O ring S 34 14 Damper A 17 and Hammer Holder A 18 in the Front Cover 12 Supporting the flange portion of the Front Cover 12 with a proper jig lightly push in Ring B 20 using a proper
27. urning method variable lock mechanism for easy working angle adjustment of chisels etc Large trigger switch for comfortable operation Soft touch grip for D type side handle with adjustable mechanism for easier handling 360 rotation plus positioning from front to rear Vibration reduction mechanism 4 1 Selling Point Descriptions 4 1 1 Lowest vibration level in the class The vibration level of the Model H 45MRY is about 50 to 60 lower than the similar products It is the lowest vibration level in the class Therefore the vibration exposure limit time defined by the EU Physical Agents Vibration Directive is longest in the class Maker Model HITACHI HITACHI C B H 45MRY H45MR Full load vibration level Tri axial m sec 7 7 14 2 14 0 19 2 Vibration exposure limit min 202 4 59 5 61 2 32 6 4 1 2 High chipping and demolishing performance with low vibration and noise level The hammering energy is transmitted more efficiently while the vibration level and the full load noise level are lowest in the class The demolishing performance is about 1 2 times higher than the similar products Maker Model HITACHI HITACHI C B H 45MRY H45MR Ratio of demolished weight 96 100 84 87 86 Full load vibration level Tri axial m sec 7 7 14 2 14 0 19 2 Full load noise level dB 99 101 103 101
28. ve are subject to change without notice Please refer to periodic Technical News Bulletins 6 COMPARISONS WITH SIMILAR PRODUCTS 6 1 Specification Comparison Maker HITACHI C B Model name H 45MRY H 45MR Power input W 950 950 1 100 1 100 Striking energy per stroke J 12 7 12 5 1 8 to 12 0 2 0 to 12 0 Full load impact rate min 3 000 3 000 1 100 to 2 650 1 300 to 3 000 Full load vibration level Tri axial m sec LE 14 2 14 0 19 2 Vibration exposure limit min 202 4 59 5 61 2 32 6 Full load noise level dB 99 101 103 101 475 454 454 450 Length 18 45 64 17 7 8 17 7 8 17 23 32 230 230 223 230 Dimensions Height 9 1 6 9 1 16 8 25 32 9 1 16 104 106 99 102 mm Width 4 3 32 4 11 64 8 57 64 4 1 64 5 9 5 9 4 7 5 5 Weight without cord and side handle k 13 0 lbs 13 0 Ibs 10 4 Ibs 12 1 Ibs insulation str cture Double Double Double Double insulation insulation insulation insulation Vibration reduction mechanism O gt gt x Vibration absorbing handle O O x Q 6 2 Demolition Performance Comparison The data shown in Fig 1 are obtained in actual factory tests and are for reference only Demolished amount may vary in accordance with operating conditions operator skill etc Demolished amount kg 30 min 0 2
29. ylinder crank case Vibration absorbing unit Switch handle Front cover Retainer sleeve Fig 8 m4 8 7 Tool Retainer The Model H 45MRY is equipped with a slide type tool retainer Tools can be attached and detached just by pulling grip A While pulling grip A in A direction insert the tool in the hole of the front cap Fig 9 Adjust the groove position by turning the tool and push it in to the end Lock the tool by returning grip A back to the original position Grip A Front cap Tool shank Fig 9 8 8 Adjusting Mechanism for the Tool Swivel Angle The tool swivel angle can be easily changed in 12 steps The tool swivel angle can be set freely to the desired position by pushing out grip B ahead in A direction and then turning grip A in B Fig 11 Grip B Fig 10 15 8 9 Side Handle The side handle can be adjusted by 360 rotation and also allows operation from front to rear Loosen the handle by turning the grip in A direction and adjust the handle to a convenient position Turn the grip in direction to fix the side handle Fig 11 16 9 REPAIR GUIDE 9 1 Precautions and Suggestions for Disassembly and Reassembly of the Main Body The numbers in Bold correspond to the item numbers in the Parts List and the exploded assembly diagrams of the Model H 45MRY 9 1 1 Disassembly Retainer disassembly See Figs 12 and 13 Pull Grip A 2 fully
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