Hitachi WH 12DAF Technical Data And Service Manual
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Hitachi WH 12DAF Technical Data And Service Manual

Hitachi WH 12DAF Technical Data And Service Manual

Cordless impact driver
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Download this manual See also: Operation Manual & Safety Instructions
MODEL
WH 12DAF
POWER TOOLS
TECHNICAL DATA
CORDLESS IMPACT DRIVER
AND
WH 12DAF
SERVICE MANUAL
W
LIST No. F880
Feb. 2003
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi WH 12DAF

  • Page 1 MODEL WH 12DAF POWER TOOLS TECHNICAL DATA CORDLESS IMPACT DRIVER WH 12DAF SERVICE MANUAL LIST No. F880 Feb. 2003 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • 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: Competitor Symbol Utilized Model Name Company Name 6914D MAKITA DW977K DeWALT...

  • Page 3: Table Of Contents

    8. OTHER PRECAUTIONS ........................ 14 9. REPAIR GUIDE ..........................15 9-1. Precautions in Disassembly and Reassembly ................. 15 9-2. Precautions in Disassembly and Reassembly of Battery Charger ..........21 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ............... 22 Assembly Diagram for WH 12DAF...

  • Page 4: Product Name

    The current high-grade Model WH 12DM is obtaining high evaluation in the cordless impact driver market that is expanding especially in Europe. The new Model WH 12DAF is a popular version that provides an excellent cost/ performance ratio, inheriting the well-reputed features of the Model WH 12DM such as soft grip and belt hook.

  • Page 5: Selling Points

    (2) Soft-grip handle The grip of the Model WH 12DAF is soft, slip-resistant and comfortable thanks to the soft resin (elastomer) covered on the handle. (3) Convenient belt hook A hook is very convenient if there is no place to put the impact driver temporarily.

  • Page 6: Specifications

    5. SPECIFICATIONS 5-1. Specifications Small screw M4 --- M8 (5/32" --- 5/16")* Capacity Ordinary bolt M4 --- M12 (5/32" --- 15/32") High-strength bolt M4 --- M10 (5/32" --- 3/8") Tightening torque 88 N m (900 kgf cm, 780 in-lbs.)* • •...
  • Page 7 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Gross WH 12DAF (SSK) (with extra battery) 5.1 kg (11.3 lbs.) •...

  • Page 8: Optional Accessories

    Pilot lamp indications (Model UC 24YFA) 0.5 sec ON, 0.5 sec OFF Prior to charging Blinks Stays ON constantly During charging Red pilot lamp remains lit or flashes 0.5 sec ON, 0.5 sec OFF Charging completed Blinks Charging not 0.1 sec ON, 0.1 sec OFF Storage battery or charger Flickers possible...

  • Page 9: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons Maker HITACHI Model WH 12DAF WH 12DM Item Small screw M4 --- M8 (5/32" --- 5/16") M4 --- M8 (5/32" --- 5/16") M4 --- M8 (5/32" --- 5/16") Capacity Ordinary bolt M4 --- M12 (5/32" --- 15/32") M5 --- M12 (3/16"...

  • Page 10: Tightening Torque

    6-2. Tightening Torque 6-2-1. Screw Diameter and Appropriate Tightening Torque Generally speaking, the appropriate tightening torque for a screw can be determined by the strength grade of the screw and the material tightened. Tables 1 and 2, and Fig. 1 below list data relative to the strength grade of various screws and the appropriate tightening torque.
  • Page 11 Ordinary bolt; strength grade 4.8 High-strength bolt; strengh grade Yield point or durable force: 12.9 (45,500 psi) Tensile strength of the bolt: (56,900 psi) Washer Model WH 12DAF (kgf 3/8" x 1-3/6" (kgf 5/16" x 1-3/6" • • • •...

  • Page 12: Number Of Screws Or Bolts Driven

    (1) Number of screws or bolts driven Model HITACHI HITACHI Tightening condition WH 12DAF WH 12DM EB 1222BL 1222 DW9071 EB 1214L Battery (Nominal capacity) (1.4 Ah)

  • Page 13: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION 7-1. Safety Instructions In the interest of promoting the safest and most efficient use of these tools 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.
  • Page 14 Ensure that all customers understand that Type EB 1212S, EB 1214L, EB 1220BL or EB 1222HL storage batteries should be turned in to any Hitachi power tool sales outlet or authorized service center when they are no longer capable of being recharged or repaired. If thrown into a fire, the batteries may explode, or if discarded indiscriminately, leakage of the cadmium compound contained in the battery may cause environmental pollution.

  • Page 15: Tightening Torque Inspection Prior To Operation

    7-2. Tightening Torque Inspection Prior to Operation As described and shown in Para. 6-2-2, the output tightening torque of which the Model WH 12DAF is capable in excess of the rated tightening torque of certain bolts and screws. Accordingly, if the tightening time is prolonged for such bolts and screws, it could cause damage to their threads or, in the worst case, cause them to be sheared off.
  • Page 16 (1) Voltage of battery Tightening torque is affected by the voltage output of the battery. Tightening torque decreases as the number of bolts tightened increases. This phenomenon is caused by the decline in voltage output of the battery due to the increasing number of bolts tightened.

  • Page 17: Suggestions And Precautions For The Efficient Use Of The Charger And Storage Batteries

    7-4. Suggestions and Precautions for the Efficient Use of the Charger and Storage Batteries (1) Batteries may not be rechargeable immediately after use If any of the storage batteries Types EB 1212S, EB 1214L, EB 1220BL and EB 1222HL is exposed to direct sunlight for an extended period or if the temperature of the battery is high immediately after it has been used in the tool, the battery may not be chargeable when the battery is connected to the charger.

  • Page 18: Repair Guide

    9-1. Precautions in Disassembly and Reassembly The [Bold] numbers correspond to the item numbers in the Parts List and the exploded assembly diagram for the Model WH 12DAF. 9-1-1. Disassembly (1) Removal of the Gear Box Ass'y [1] Remove the four Tapping Screws (W/Sp.
  • Page 19 Small flat-blade screwdriver Anvil (B) [9] Retaining Ring [2] Washer (D) [3] Gap of retaining ring Guide Sleeve [5] Fig. 3-1 Fig. 3-2 Hold the body and adjust gap of the retaining ring to Press down washer (D) with the screwdriver. groove of anvil (B), then insert a small flat-blade screwdriver into the groove at an angle.
  • Page 20 Remove the hammer assembly from the J-297 base for washer (S) and support the end surface of the Spindle [18]. With a hand press, push down either of the raised faces of the Hammer [11] to compress the Spring [14]. In this position, extract the two Steel Balls D5.556 [10] from the cam grooves of the Spindle [18] and the Hammer [11] with a small flat-blade screwdriver or a similar tool.
  • Page 21 Internal Wire (Red) [28] Motor [27] Red marking Depression for (Indicate positive side) anti-rotating Projection of the Internal Wire (Black) [29] forwarding/reversing lever DC-Speed Control Switch [34] Internal Wire (Red) [28] Internal Wire (Black) [29] Fin [42] Machine Screw (W/Sp. Washer) M3 x 4 [41] Fig.
  • Page 22 (2) Reassembly of Housing (A).(B) Set [32] Mount the Strap [40] and housing (B) to housing (A), and secure them with the seven Tapping Screws (W/Flange) D4 x 20 [30]. (3) Reassembly of the mechanical parts (a) Put Washer (S) [15] onto the shaft of the Spindle [18] and mount the Hammer [11] containing the twenty- eight Steel Balls D3 [12], Washer (J) [13] and the Spring [14] to the Spindle [18].
  • Page 23 Twenty-eight Steel Balls D3 [12] Needle Roller [20] Tooth flanks and 5 mm diameter hole of the Idle Gear Set [19] (b) HITACHI MOTOR GREASE No. 29 Steel Ball D3.5 [8] Sliding section of Anvil (B) [9] and the Guide Sleeve [5]...

  • Page 24: Precautions In Disassembly And Reassembly Of Battery Charger

    (9) Screw tightening torque Tapping Screw (W/Sp. Washer) D4 x 35 [6] 1.96 0.49 N m (20 5 kgf cm, 17.4 4.3 in-lbs.) • • • • • • • • • • • • • • • • • •...

  • Page 25: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow WH 12DAF DC-Speed Control Switch Housing (A).(B) Set Hook Ass'y Inner Cover Damper Motor General Assembly Hammer Case Hammer Guide Sleeve Anvil Steel Ball Ring Gear Spring...
  • Page 26 LIST NO. F880 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT DRIVER 2003 • • Model WH 12DAF (E1)
  • Page 27 PARTS WH 12DAF ITEM CODE NO. DESCRIPTION REMARKS USED 321-914 GEAR BOX ASS’Y 1 INCLUD. 2-5, 7-26 315-984 RETAINING RING 315-983 WASHER (D) 320-409 GUIDE SPRING 321-885 GUIDE SLEEVE 306-305 TAPPING SCREW (W/SP. WASHER) D4X35 (BLACK) 321-881 HAMMER CASE 319-535 STEEL BALL D3.5 (10 PCS.)
  • Page 28 STANDARD ACCESSORIES WH 12DAF ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 12SD) CHARGER (MODEL UC 24YFA) 321-916 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 992-671 + DRIVER BIT (B) NO.2 50L 992-672 + DRIVER BIT (B) NO.3 50L 992-689 NON-MAGNETIC HEX.
  • Page 29 WH 12DAF ITEM CODE NO. DESCRIPTION REMARKS USED --- 4 --- 2 -- 03 Printed in Japan (030225N)

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