Hitachi WR12DMB Service Manual

Hitachi WR12DMB - 12.0 V 1/2" Impact Wrench 2 Battery Manual

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  • Hitachi WR12DMB | Service Manual - Page 1
    MODEL WH 12DM WR 12DM POWER TOOLS CORDLESS IMPACT DRIVER WH 12DM CORDLESS IMPACT WRENCH WR 12DM TECHNICAL DATA AND SERVICE MANUAL WH12DM WR12DM EB1222.00BALh WH 12DM EB1222.00BALh WR 12DM LIST Nos. WH 12DM: F862 WR 12DM: F864 Oct. 2001 W SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE
  • Hitachi WR12DMB | Service Manual - Page 2
    REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows: WH
  • Hitachi WR12DMB | Service Manual - Page 3
    Suggestions and Precautions for the Efficient Use of the Charger 29 9. OTHER PRECAUTIONS ...30 10. REPAIR GUIDE ...31 10-1. Precautions in Disassembly and Reassembly 31 10-2. Precautions in Disassembly and Reassembly of Battery Charger 38 11. STANDARD REPAIR TIME (UNIT) SCHEDULES 39 Assembly
  • Hitachi WR12DMB | Service Manual - Page 4
    Hitachi agricultural machinery and tools, industrial machines facilities. • Service industry: General battery. (1) BL K specification: One EB 1220BL battery (NiCad, capacity 2.0 Ah), UC 14YF2 charger and case (2) 2BLFK specification: Two EB 1220BL batteries (NiCad, capacity 2.0 Ah), UC 14YF2 charger
  • Hitachi WR12DMB | Service Manual - Page 5
    Hitachi Koki), large fan and optimum air ducts. • Improved dust resistance: Ball bearings with contact seals Labyrinth construction • Long service flat battery • Selectable from three types: high-capacity NiMH battery, light-weight NiMH battery and NiCad battery • Conventional stand-up batteries (EB
  • Hitachi WR12DMB | Service Manual - Page 6
    common to the Model WH 12DM WR12DM • Newly designed compact body • Ergonomically designed comfortable handle (slip-resistant double-molded grip) • Convenient one-touch hook • Stable flat battery (interchangeable) • High durability, dust resistance and long service life EB1222.00BALh --- 3 ---
  • Hitachi WR12DMB | Service Manual - Page 7
    in continuous operation are much sought after. However, there are problems such as heavy noise or vibration of the ball bearings and decrease harshly in dusty environments. In addition, higher strength and longer service life are required to continuously tighten and loosen bolts in scaffolding and
  • Hitachi WR12DMB | Service Manual - Page 8
    decrease in speed due to temperature rise. The motor is manufactured using the latest facilities in Yamagata Plant. Temperature 250 200 C: Smoking 150 Burnout C 100 1 battery 2 batteries 3 batteries HITACHI WH 12DM 50 0 As shown in the above graph, C produces smoke when operating on one
  • Hitachi WR12DMB | Service Manual - Page 9
    to the contact seal bearings. The labyrinth construction ensures protection against dust. 3 Improved service life and durability Although the service life may vary depending on the frequency of use and the severity, the service life of the Models WH 12DM/WR 12DM is 1.5 times longer than C in
  • Hitachi WR12DMB | Service Manual - Page 10
    previous model is continuously operated, the housing tail rubs the base of the operator's thumb and gives pain to the operator. To cope with this problem, the Models WH 12DM/WR 12DM are equipped with the separate-type motor without case to make the housing tail section slim. More delicate speed
  • Hitachi WR12DMB | Service Manual - Page 11
    ) There are user requests for a new cordless impact driver that can stand upright stably and can also be operated on the conventional batteries (chargers). The new flat batteries for the Models WH 12DM/WR 12DM have low height and wide bottom enough to stand the Models WH 12DM/WR 12DM upright and
  • Hitachi WR12DMB | Service Manual - Page 12
    thicker) for longer service life of the terminal. In addition, the terminal is movable according to the movement of the battery to prevent damage to a blade for powerful cooling while C's fan is simple with only the blades. HITACHI WH 12DM C 114 g 87 g Outside diameter of core: 30.5 mm Stacking
  • Hitachi WR12DMB | Service Manual - Page 13
    spruce) Model Fast Slow 1 234 5 67 8 9 10 sec. HITACHI WH 12DM HITACHI WH 12DH C 6.5 sec. 7.2 sec. 9.5 sec. * Tightening time may vary depending on hardness of the workpiece, ambient temperature, characteristics of the battery, etc. Maximum tightening torque: 100 N•m {1020 kgf•cm, 885
  • Hitachi WR12DMB | Service Manual - Page 14
    Selling points of the Model WR 12DM Powerful tightening torque 150 N•m {1530 kgf•cm, 1330 in-lbs.} The Model WR 12DM is equipped with the new rare-earth magnet motor that is more powerful than the previous model by 30% and the 35% larger hammer. With the computer analysis, the Model WR 12DM gives
  • Hitachi WR12DMB | Service Manual - Page 15
    9 8.1 8 7.4 7 Loosening time (sec.) 6 5 4.6 4 3 2 1 0 WR 12DM WR 12DH C Fig. 2 *The data above are intended for reference purposes only because actual loosening torque will vary depending on tightening conditions. (3) Sinking time comparison (square washers) Figure 3 shows the time
  • Hitachi WR12DMB | Service Manual - Page 16
    strokes Thanks to the larger hammer (higher hammer inertia J) than the previous model, the number of strokes (N) of the Model WR 12DM is increased. As a guide, stroking force is proportional for J X N2. Therefore, when the J X N2 of the Model WR 12DH is 100, the J X N2 of the Model WR 12DM is
  • Hitachi WR12DMB | Service Manual - Page 17
    Square drive Fan cooled rare-earth magnet motor Main body: Polyamide resin + elastomer Housing Aluminum alloy die casting Hammer case Storage battery: ABS resin (black) Charger: ABS seconds with a hexagonal socket. *4: Main body does not include accessory tools (hexagonal bit, etc.). --- 14 ---
  • Hitachi WR12DMB | Service Manual - Page 18
    Green pilot lamp is lit. temperature Flickers Lit 0.1 sec ON, 0.1 sec OFF Stays ON constantly Storage battery or charger is faulty. Charging not possible because storage battery temperature is too high. 6-2. Optional Accessories (1) Optional accessories for the Model WH 12DM • Plus driver bit
  • Hitachi WR12DMB | Service Manual - Page 19
    . (2) Optional accessories for the Model WR 12DM • Each dimension and applicable bolt for each hexagon socket Shape B Shape C Shape D Square drive dimension Sq 12.7 mm (1/2") Hexagon socket Shape Part name Code No. 10 mm 944291 Nominal diameter of applicable bolts ISO (Highstrength) ISO
  • Hitachi WR12DMB | Service Manual - Page 20
    Square drive dimension Sq 12.7 mm (1/2") Long socket Part name Code No. 12 mm 955138 Nominal diameter of applicable bolts ISO (Highstrength) ISO ISO (Ordinary) (Small type)
  • Hitachi WR12DMB | Service Manual - Page 21
    (Cordless Impact Driver) Catalog specifications Maker HITACHI Item Model WH 12DM WH 12DH C Small EB 1230HL EB 12B or EB 12H 1222 Nominal capacity Battery Ah EB 1220BL: 2.0 EB 1230HL: 3.0 EB tool case • Charger (UC 14YF2) • Plastic tool case • Plastic tool case • Charger • Charger
  • Hitachi WR12DMB | Service Manual - Page 22
    Wrench) Catalog specifications Maker HITACHI Item Model WR 12DM WR drive 12.7 mm (1/2") Square drive 12.7 mm (1/2") Square drive Tool EB 12H 1222 Nominal capacity Battery Ah EB 1220BL: 2.0 EB tool case • Charger (UC 14YF2) • Plastic tool case • Plastic tool case • Charger • Charger
  • Hitachi WR12DMB | Service Manual - Page 23
    time Fig. 4-2 Test conditions Bolt: M12 x 45 mm (15/32" x 1-25/32") (strength grade: 12.9) Steel plate: Mild steel Thickness = 25 mm (1") Accessory tool: Hexagon socket C (forward) WH 12DH 3 (sec.) Test conditions Bolt: M16 x 55 mm (5/8" x 2-5/32") (F10T) Steel plate: Mild steel Thickness = 25 mm
  • Hitachi WR12DMB | Service Manual - Page 24
    stress (kgf/mm2) 29.1 43.7 Material Mild steel Heat treatment None 8.8 12.9 58.2 95 Alloy steel including Ni, Mn, Cr, etc. Processed-hard material • Diameter and effective sectional areas of threads Table 2 Kind of thread (x pitch) M5 x 0.8 mm M6 x 1 mm (3/16") (1/4") M8 x 1.25 mm
  • Hitachi WR12DMB | Service Manual - Page 25
    7-3-3. Bolt Tightening torque characteristics Figures. 6-1 and 6-2 show relationships between time and tightening torque for individual bolt types and sizes. While the data are useful for handy reference, actual tightening torque will vary depending on tightening conditions and other variables. For
  • Hitachi WR12DMB | Service Manual - Page 26
    tightening time will vary depending on hardness of the workpiece, ambient temperature, characteristics of the battery, etc. 1 Wood screw 5.3 mm dia. x 120 mm length, hemlock spruce Model Fast Slow 1 2 3 4 5 6 7 8 9 10 sec. HITACHI WH 12DM HITACHI WH 12DH C 6.5 sec. 7.2 sec. 9.5 sec
  • Hitachi WR12DMB | Service Manual - Page 27
    Battery Wood screw 4.0 mm dia. x 50 mm (soft wood) Wood screw 4.2 mm dia. x 90 mm (hard wood) Wood screw 5.3 mm dia. x 120 mm (hard wood) Machine screw (M8 x 16 mm) HITACHI WH 12DM EB 1220BL 575 115 45 1,280 HITACHI 12DM consumes higher power than C for driving a short or machine screw because it
  • Hitachi WR12DMB | Service Manual - Page 28
    only because actual noise will vary depending on the types of workpieces, hardness, etc. Measuring conditions: (a) Wood screws (4.5 mm in diameter and 90 mm in length) and cedar workpieces (b) Battery voltage 12 V, A-range, distance 1 m (c) Average of tightening 5 screws (dB) 98 (sec.) 3 96
  • Hitachi WR12DMB | Service Manual - Page 29
    . Customers must be instructed to fully charge the unit prior to use. (2) When charging storage batteries, use only the exclusive Model UC 14YF2 Charger provided with the tool. Because of the designed rapid-charging feature (about one hour), use of other battery chargers is hazardous. (3) Follow
  • Hitachi WR12DMB | Service Manual - Page 30
    on the Name Plate attached to the Model UC 14YF2 Charger. For the U.S.A. CAUTION • For safe operation, see Instruction Manual. • Charge HITACHI rechargeable batteries Type EB 7, EB 9, EB 12 and EB 14 series. Other types of batteries may burst causing personal injury and damage. • Charge between 32
  • Hitachi WR12DMB | Service Manual - Page 31
    aware of and understands this characteristic. Model WR 12DM (N• m) M16 x 55 (5/8" x 2-5/32") F10T (tightening time: 3 sec.) 1,600 160 12 (1389 in-lbs.) a Battery voltage Tightening torque 10 1,200 120 (1042 in-lbs.) 8 When fully charged 6 800 80 (694 in-lbs.) 4 400 40 2 (347 in-lbs
  • Hitachi WR12DMB | Service Manual - Page 32
    less than when the bolt is tightened into a hard material such as steel. (5) Different tightening conditions The batteries is 40 ˚C (104 ˚F) or higher immediately after they have been used in the tool, the pilot lamp may not light up when the batteries are connected to the Model UC 14YF2 Charger
  • Hitachi WR12DMB | Service Manual - Page 33
    socket dimensions. (3) Hammering section lubrication Grease (ATTOLUB MS No. 2) 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 subsequent increased wear of components
  • Hitachi WR12DMB | Service Manual - Page 34
    10. REPAIR GUIDE WARNING: Without fail, remove the Model EB 1220BL or EB 1230HL Battery from the main body before starting repair or maintenance work. Because the tool is cordless, if the battery is left in and the switch is activated inadvertently, the motor will start rotating unexpectedly, which
  • Hitachi WR12DMB | Service Manual - Page 35
    from the J-297 base for washer (S) and support the end surface of the Spindle [17] with a small flat-blade screwdriver or a similar tool. Then, slowly release the hand press and lift Hammer [ 11] Steel Ball D5.556 [10] Steel ball guide groove Fig. 10 (4) Removal of the Carbon Brushes 5 x
  • Hitachi WR12DMB | Service Manual - Page 36
    (5) Removal of the Hook Ass'y [39] Remove the Special Screw M5 [43] with a flat-blade screwdriver or a coin and remove the Hook Ass'y [39] and the Hook Spring [42] . (6) Removal of Housing (B) Remove the seven Tapping Screws (W/Flange) D4 x 20 (Black) [31] from the main body.
  • Hitachi WR12DMB | Service Manual - Page 37
    (10) Removal of the Armature Ass'y [25] Support the Inner Cover [24] so that it does not contact the fan of the Armature Ass'y [25] . With a hand press, push down the
  • Hitachi WR12DMB | Service Manual - Page 38
    (c) Mount a unit of the Inner Cover [24] (including the Armature Ass'y [25] ), Magnet [26] (including the Dust Guard Fin [27] ) and Brush Block [28] into housing (A) (See Fig. 15). Pay attention to the following items. Adjust the protrusion of the Dust Guard Fin [27] to
  • Hitachi WR12DMB | Service Manual - Page 39
    Hammer Spring [14] to the Spindle [17] . (b) Align the top of the cam groove on the Spindle [17] with the steel ball guide groove on the Hammer [11] as illustrated in Fig. 10. Press down either of the raised faces of the Hammer [11] with a hand press to
  • Hitachi WR12DMB | Service Manual - Page 40
    (A) [4] (WH 12DM only) Insert the two Steel Balls D3.5 [8] into the hole of Anvil (C) [9]. Mount the Guide Sleeve (A) [4], Guide Spring [3] and Washer (D) [2] in sequence. Mount the Retaining Ring [1] into the groove of anvil using the J295 jigs (A) and (B) for retaining ring as illustrated
  • Hitachi WR12DMB | Service Manual - Page 41
    HITACHI MOTOR GREASE No. 29 (WH 12DM only) • Two Steel Balls D3.5 [8] • Sliding section between Anvil (C) [9] and Guide .) 10-2. Precautions in Disassembly and Reassembly of Battery Charger Refer to the Technical Data and Service Manual for precautions in disassembly and reassembly of the Model
  • Hitachi WR12DMB | Service Manual - Page 42
    11. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL Fixed 10 20 30 40 WH 12DM WR 12DM Work Flow DC-Speed Control Switch Housing (A).(B) Set General Assembly Inner Cover Armature Ass'y Magnet Brush Block Hammer Case Washer Anvil (B) Ring Gear Steel Ball Hammer Washer Hammer Spring
  • Hitachi WR12DMB | Service Manual - Page 43
    LIST NO. F862 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT DRIVER Model WH 12DM 2001 • 10 • 5 (E1) 1 2 3 4 5 6 20 21 22 23 24 25 501 502 7 8 9 10 11 12 13 14 15 16 26 27 17 18 19 28 29 30 31 32 35 37 45 36 35 33 34 38 41 39 40 43 42 44
  • Hitachi WR12DMB | Service Manual - Page 44
    (D) 1 GUIDE SPRING 1 GUIDE SLEEVE SUPPORT (B) 1 MACHINE SCREW (W/SP. WASHER) M3X5 2 DC-SPEED CONTROL SWITCH 1 PUSHING BUTTON 1 HITACHI LABEL 1 HOOK ASS'Y 1 INCLUD.40 V-LOCK NUT M5 1 STRAP (BLACK) 1 HOOK SPRING 1 SPECIAL SCREW M5 1 BATTERY EB 1220BL (W/ENGLISH N.P.) 1 BATTERY
  • Hitachi WR12DMB | Service Manual - Page 45
    ITEM NO. CODE NO. DESCRIPTION NO. USED 501 CHARGER (MODEL UC 14YF2) 1 502 320-377 CASE 1 REMARKS WH12DM OPTIONAL ACCESSORIES ITEM NO. CODE NO. DESCRIPTION NO. USED * 601 310-378 BATTERY EB 12B (W/ENGLISH N.P.) 1 REMARKS * 601 310-453 BATTERY EB 12B (W/ENGLISH N.P.) 1 FOR USA,CAN
  • Hitachi WR12DMB | Service Manual - Page 46
    ITEM NO. CODE NO. DESCRIPTION NO. USED REMARKS WH12DM --- 4 --- Printed in Japan 10 -- 01 (011005N)
  • Hitachi WR12DMB | Service Manual - Page 47
    LIST NO. F864 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT WRENCH Model WR 12DM 2001• 10 • 25 (E1) 1 501 502 2 3 4 5 6 7 8 17 18 19 20 21 22 9 10 11 12 13 14 15 16 23 24 25 26 27 28 29 32 30 34 33 32 31 35 38 36 37 40 39 41
  • Hitachi WR12DMB | Service Manual - Page 48
    33 319-906 DC-SPEED CONTROL SWITCH 1 34 316-166 PUSHING BUTTON 1 35 HITACHI LABEL 1 36 320-378 HOOK ASS'Y 1 INCLUD.37 37 320-288 V-LOCK 41 320-387 BATTERY EB 1220BL (W/ENGLISH N.P.) 2 * 41 320-386 BATTERY EB 1220BL (W/ENGLISH N.P.) 1 FOR USA,CAN * 41 320-388 BATTERY EB 1230HL (W/ENGLISH
  • Hitachi WR12DMB | Service Manual - Page 49
    EB 12B (W/ENGLISH N.P.) 1 FOR NZL,AUS * 601 310-453 BATTERY EB 12B (W/ENGLISH N.P.) 1 FOR USA,CAN 602 CORNER ATTACHMENT ASS'Y 1 INCLUD.603-619 603 955-300 HOUSING 1 604 955-301 METAL 3 605 955-302 SPINDLE 1 606 HITACHI LABEL 1 607 955-303 BEARING RACE 2 608 955-304 NEEDLE THRUST
  • Hitachi WR12DMB | Service Manual - Page 50
    OPTIONAL ACCESSORIES ITEM NO. CODE NO. DESCRIPTION 630 873-626 HEX. SOCKET ASS'Y 21MMX36L NO. USED REMARKS 1 INCLUD.618,619 631 873-627 HEX. SOCKET ASS'Y 22MMX40L 1 INCLUD.618,619 632 955-138 HEX. SOCKET ASS'Y (LONG) 12MMX52L 1 INCLUD.618,619 633 955-139 HEX. SOCKET ASS'Y (LONG) 13MMX52L
  • Hitachi WR12DMB | Service Manual - Page 51
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POWER TOOLS
TECHNICAL
DATA
AND
SERVICE
MANUAL
CORDLESS IMPACT DRIVER
WH 12DM
CORDLESS IMPACT WRENCH
WR 12DM
SPECIFICATIONS
AND
PARTS
ARE
SUBJECT
TO
CHANGE
FOR
IMPROVEMENT
LIST Nos. WH 12DM: F862
WR 12DM: F864
Oct. 2001
W
MODEL
WH 12DM
WH 12DM
WR 12DM
WR 12DM
EB1220BL
2.0Ah
WH12DM
EB1220BL
2.0Ah
WR12DM