TECHNICAL DATA
AND
SERVICE MANUAL
IMPACT WRENCH
WR 16SA
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. E705
Feb. 2005
W
MODEL
Hitachi
Power Tools
Page 1: ...TECHNICAL DATA AND SERVICE MANUAL IMPACT WRENCH WR 16SA SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No E705 Feb 2005 W MODEL WR 16SA Hitachi Power Tools ...
Page 2: ... AND SERVICE MANUAL symbols are used in the place of company names and model names of our competitors The symbols utilized here are as follows Symbol Utilized Competitor Company Name Model Name C MAKITA TW0350 B BOSCH GDS18E P DEWALT DW290 ...
Page 3: ...Appropriate Tightening Torque for Bolts 9 6 4 Tightening Torque Characteristics when Using An Extension Cord 10 7 PRECAUTIONS IN SALES PROMOTION 10 7 1 Safety Instructions 10 7 2 Tightening Torque Inspection Prior to Operation 11 7 3 Tightening Torque Variation 11 7 4 Temperature Rise 12 8 OTHER PRECAUTIONS 13 9 REPAIR GUIDE 14 9 1 Disassembly 14 9 2 Reassembly 16 9 3 Insulation Tests 18 9 4 No lo...
Page 4: ...pplicable markets Wooden construction industry Tightening of bolts etc Construction industry Assembly of scaffolding tightening loosening of formwork bolts Manufacturing industry Tightening loosening of bolts for automobiles rolling stock shipbuilding agricultural machinery and tools construction machinery etc Utility industry Assembly and installation of electric equipment plumbing facilities air...
Page 5: ...n insert screw While the conventional Model WH 16 has the resin housing directly secured with screws the Model WR 16SA has the housing containing a brass insert screw for secure screw connection with the aluminum hammer case the screw tightening torque is 2 times greater than the Model WH 16 Thus the Model WR 16SA has higher durability Hammer case aluminum Screw M5 bolt WR 16SA WH 16 Screw M5 bolt...
Page 6: ...r entirely The Model WR 16SA gives no scratch on the floor etc where it is placed because the housing is covered with elastomer entirely In addition the elastomer covered housing prevents the Model WR 16SA from slipping on a slanted surface such as a roof 6 Large bumper protects the outside Prevention of damaging workpieces and being stained The Model WR 16SA minimizes damaging workpieces even if ...
Page 7: ...er pushing button Power consumption 480 W 450 W 220 V Full load current 4 6 A 110 V 4 2 A 120 V 2 2 A 220 V 2 2 A 230 V 2 1 A 240 V Impact rate 2 100 min Main body 2 8 kg 6 2 lbs Excludes cord socket and side handle Packaged 4 8 kg 10 6 lbs Overall length x height 258 mm x 225 mm 10 5 32 x 8 55 64 Center height 38 mm 1 1 2 Package Cord Side handle Excludes U S A and Canada Plastic case For certain...
Page 8: ...q mm Part name Code No Nominal diameter of applicable bolts Dihedral width H mm Shape Socket primary dimensions mm M 10 M 12 M 14 M 16 M 18 M 20 M 10 M 12 M 14 M 16 M 18 M 20 M 22 L ISO Ordinary ISO Small type Inch screw High tension Shape B Shape C Shape D 5 2 Optional Accessories 1 Each dimension and applicable bolt for each hexagon socket 2 Each dimension and applicable bolt for each long hexag...
Page 9: ... 6 3 Extension bar Code No 873633 4 Corner attachment EW 14R 5 Universal joint Code No 986062 6 Side handle Code No 323774 ...
Page 10: ...0 HITACHI WH 16 270 x 215 10 5 8 x 8 15 32 Tumbler switch with forward reverse changeover pushing button 230 17 000 18 5 440 2 0 46 38 1 1 2 2 9 6 4 lbs Single phase AC commutator motor Double insulation Mounted outside 2 5 8 2 ft Not provided M 12 M 22 M 12 M 16 350 3 570 3 100 12 7 1 2 2 000 2 000 C 283 x 235 11 9 64 x 9 1 4 Tumbler switch with forward reverse changeover pushing button 230 22 80...
Page 11: ...htening torque when tightening M16 high tension bolts Bolt M20 x 70 ordinary bolt Steel plate SS34P 40 mm in thickness Tightening time S Fig 2 Comparison of tightening torque when tightening M20 ordinary bolts WR 16SA WH 16 P B C 3500 3035 in lbs kgf cm 2000 1734 in lbs 2500 2168 in lbs 3000 2602 in lbs 1500 1301 in lbs WR 16SA WH 16 P B C 3500 3035 in lbs kgf cm 2000 1734 in lbs 2500 2168 in lbs ...
Page 12: ...ed axial tightening force to be applied to the bolt kg p Rated axial stress kg mm2 x 0 8 x Effective sectional area of the bolt mm2 k Torque coefficient 0 17 Strength grade Rated axial stress kgf mm2 Material Heat treatment 4 8 8 8 10 9 12 9 29 1 58 2 79 2 95 Carbon steel such as SS and SC Special alloy steel such as SNC SCM and SNCM Not treated Treated Hard material Nominal diameter of bolt Effec...
Page 13: ...f the Model WR 16SA by all 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 and Name Plate attached to each tool 7 1 1 Handling Instructions Salespersons must be thoroughly famil...
Page 14: ...ion the torque values shown in Para 6 2 6 3 and 6 4 above are useful as a handy reference and may be utilized as tentative standards 1 Voltage The tightening torque of an impact wrench is influenced by voltage For example the tightening torque will be reduced to about 90 if the Model WR 16SA is operated with 90 of the rated voltage The line voltage may be reduced by the use of a long extension cor...
Page 15: ...ding on the surface finishing state of tightening materials steel aluminum etc and materials to be tightened In addition if there is a seal packing or a clearance between tightening materials the tightening torque is decreased 6 Wear and looseness of the socket With extended use the hexagonal portion of the socket which is fitted to the head of the bolt and the hexagonal portion which is fitted on...
Page 16: ...e insufficient tightening torque but could also easily cause damage to the socket Please refer to Para 5 2 for appropriate socket dimensions 3 Hammering section lubrication Grease Doubrex 251 optional accessory is utilized in the hammering section Frequent or continuous use of the tool will cause excessive temperature rise of the hammering section resulting in depletion of the grease and subsequen...
Page 17: ...ase Ass y 3 c Removal of the Ring Gear 18 Tap the end surface of the Hammer Case Ass y 3 with a wooden hammer to remove the Ring Gear 18 If the Ring Gear 18 cannot be removed warm up the Hammer Case Ass y 3 then tap it with a wooden hammer to remove the Ring Gear 18 2 Removal of the Spring 11 Push the click of the Hammer 8 with a hand press and keep it at the position where the Spring 11 is compre...
Page 18: ...ing Bushing B 47 press fitted into the Housing Ass y 58 and the ball bearing at the commutator side of the Armature 25 Be careful not to lose the Felt Packing 22 and the Packing Washer 23 when removing the Armature 25 from the Inner Cover 21 4 Removal of the Switch 36 Remove the Tapping Screw W Flange D4 x 35 Black 34 from the Handle Cover 35 to remove the Handle Cover 35 Remove the screw from the...
Page 19: ...owever special attention should be given to the following items 1 Reassembly of the housing assembly Mounting the switch Pay attention to the relationship between the terminal numbers of the Switch 36 and the colors of the internal wires Fig 10 Wiring diagram Fig 9 With noise suppressor type Other type ...
Page 20: ...lly At this time push the Hammer 8 so that the Spindle 16 cam top is aligned with the steel ball guide at the Hammer 8 c Put the two Steel Balls D6 35 7 in the steel ball guide Check that these Steel Balls D6 35 7 are in the cam groove Then release the hand press 3 Mounting direction of the packing washer Insert the Packing Washer 23 into the Inner Cover 21 in the proper direction together with th...
Page 21: ...x 35 2 7 8 1 5 N m 80 15 kgf cm Tapping Screw W Flange D4 34 49 50 2 0 0 5 N m 20 5 kgf cm Brush Cap 55 1 0 N m 10 kgf cm Machine screw M3 at the Switch 36 0 8 0 2 N m 8 2 kgf cm Hex Hd Tapping Screw D4 x 45 27 2 9 0 5 N m 30 5 kgf cm 9 3 Insulation Tests On completion of disassembly and repair measure the insulation resistance and conduct a dielectric strength test Perform the insulation resistan...
Page 22: ...DULES MODEL 10 20 30 40 50 60 min Fixed Variable Work Flow Switch Cord Handle Cover Switch Adapter Cord Armor General Assembly WR 16SA Tail Cover Housing Ass y Stator Spindle Idle Gear Set Needle Roller x 2 Hammer Steel Ball D6 35 x 2 Steel Ball D3 97 x 30 Spring Spring Seat Hammer Case Ass y O ring M Anvil Ring Gear ...
Page 23: ...RENCH Model WR 16SA 2004 12 30 E1 Hitachi Power Tools 1 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 26 27 28 29 31 33 34 35 36 37 39 40 41 44 45 46 47 48 49 50 51 52 53 54 55 56 57 59 58 43 42 501 502 503 504 505 506 6 38 32 30 20 6 ...
Page 24: ...ER COVER 1 22 323 755 FELT PACKING 1 23 985 166 PACKING WASHER 1 24 600 0DD BALL BEARING 6000DDCMPS2L 1 25 360 687C ARMATURE 110V 1 25 360 687U ARMATURE ASS Y 120V 1 INCLUD 24 45 25 360 687E ARMATURE 220V 230V 1 25 360 687F ARMATURE 240V 1 26 323 757 FAN GUIDE 1 27 981 824 HEX HD TAPPING SCREW D4X45 2 28 340 605C STATOR 110V 1 28 340 605D STATOR 120V 1 28 340 605E STATOR 220V 230V 1 28 340 605F ST...
Page 25: ...VER 1 49 301 653 TAPPING SCREW W FLANGE D4X20 BLACK 2 50 984 750 TAPPING SCREW W FLANGE D4X16 2 51 937 631 CORD CLIP 1 52 953 327 CORD ARMOR D8 8 1 52 938 051 CORD ARMOR D10 1 1 53 500 247Z CORD 1 CORD ARMOR D8 8 53 500 450Z CORD 1 CORD ARMOR D8 8 FOR GBR 230V 53 500 461Z CORD 1 CORD ARMOR D8 8 FOR GBR 110V 53 500 248Z CORD 1 CORD ARMOR D8 8 FOR SUI 53 500 439Z CORD 1 CORD ARMOR D8 8 FOR AUS NZL 5...
Page 26: ...S Y 26MMX40L 1 INCLUD 602 603 611 985 195 HEX SOCKET ASS Y 27MMX40L 1 INCLUD 602 603 612 985 196 HEX SOCKET ASS Y 30MMX50L 1 INCLUD 602 603 613 873 633 EXTENSION BAR ASS Y SQUARE 12 7MMX100L 1 INCLUD 602 603 614 955 138 HEX SOCKET ASS Y LONG 12MMX52L 1 INCLUD 602 603 615 955 139 HEX SOCKET ASS Y LONG 13MMX52L 1 INCLUD 602 603 616 955 140 HEX SOCKET ASS Y LONG 14MMX52L 1 INCLUD 602 603 617 955 141 ...
Page 27: ...TAL 3 654 955 302 SPINDLE 1 655 945 251 HITACHI LABEL 1 656 955 303 BEARING RACE 2 657 955 304 NEEDLE THRUST BEARING NTA 1413 2 658 955 305 COVER 1 659 955 306 NEEDLE BEARING NTN BK1012 1 660 948 227 RETAINING RING FOR D47 HOLE 1 661 955 307 PINION 1 662 955 308 SLEEVE 1 663 955 309 WASHER 1 664 955 310 SOCKET COVER 1 665 955 311 SOCKET 1 666 303 247 SEAL LOCK HEX SOCKET HD BOLT M5X25 6 667 873 53...
Page 28: ... 6 ITEM NO CODE NO DESCRIPTION REMARKS NO USED 12 04 WR 16SA Printed in Japan 041230N ...
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