Hitachi WH 14DM Technical Data And Service Manual
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Hitachi WH 14DM Technical Data And Service Manual

Cordless impact driver
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MODEL
WH 14DM
Hitachi
Power Tools
TECHNICAL DATA
CORDLESS IMPACT DRIVER
AND
WH 14DM
SERVICE MANUAL
W
LIST No. F884
Jun. 2003
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi WH 14DM

  • Page 1 MODEL WH 14DM Hitachi Power Tools TECHNICAL DATA CORDLESS IMPACT DRIVER WH 14DM SERVICE MANUAL LIST No. F884 Jun. 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 BTD/50SA MAKITA DEWALT DW054...

  • Page 3: Table Of Contents

    9. OTHER PRECAUTIONS ......................... 14 10. REPAIR GUIDE ..........................15 10-1. Precautions in Disassembly and Reassembly ................15 10-2. Precautions in Disassembly and Reassembly of Battery Charger ..........22 11. STANDARD REPAIR TIME (UNIT) SCHEDULES................. 23 Assembly Diagram for WH 14DM...

  • Page 4: Product Name

    The current cordless impact drivers Model WH 9DM (9.6 V) and WH 12DM (12 V) are well reputed on the market. The new Model WH 14DM (14.4 V "Super Impact 14") is being introduced to respond to user requests for a more powerful impact driver with high torque.

  • Page 5: Selling Points

    Model WH 14DM Cordless Impact Driver Powerful Compact Ultra-compact body but class-top tightening speed • Overall length of the Model WH 14DM (30% faster than the Model WH 12DM, same as P, and compared with the following models 30% faster than C) C: - 11 mm (- 3/64") P: + 12 mm (+ 3/64")

  • Page 6: Selling Point Descriptions

    It should be noted that an M12 (15/32") strength grade 12.9 high-strength bolts were tightened in 3 seconds with a hexagon socket (115 mm (4-3/64") long) in the test. The tightening torque of the Model WH 14DM is substantially higher than the previous model.
  • Page 7 12-V product Model WH 12DH thanks to the downsized hammer case. The weight of the Model WH 14DM is about 220 g (0.485 lbs.) lighter than C (The actual weight of P is about 100 g (0.220 lbs.) lighter than WH 14DM).

  • Page 8: Specifications

    6. SPECIFICATIONS 6-1. Specifications Model Cordless impact driver WH 14DM Item Capacity Small screw M4 --- M10 (5/32" --- 3/8") Ordinary bolt M6 --- M14 (1/4" --- 9/16") High-strength bolt M6 --- M12 (1/4" --- 15/32") Tightening torque 135 N m (1,375 kgf cm, 1,190 in-lbs.)*...

  • Page 9: Optional Accessories

    High battery Stays ON constantly because storage battery Green pilot lamp is lit. temperature temperature is too high. 6-2. Optional Accessories (1) Optional accessories for the Model WH 14DM • Plus driver bit Bit No. Code No. No. 2 992671 50 mm (2")

  • Page 10: Comparisons With Similar Products

    7. COMPARISONS WITH SIMILAR PRODUCTS 7-1. Specification Comparisons Maker HITACHI HITACHI Model WH 12DM WH 14DM Item M 4 --- M 10 M 4 --- M 8 M 4 --- M 10 Small screw* (5/32" --- 3/8") (5/32" --- 5/16") (5/32"...

  • Page 11: Tightening Torque

    7-2. Tightening Torque 7-2-1. Tightening torque characteristic comparisons Thanks to the high-power rare-earth magnet motor and the larger hammer inertia, the Model WH 14DM can provide greater tightening torque. WH 14DM • • 1600 (1389 in-lbs.) Test conditions 1400 Bolt: M12 x 45 mm (15/32" x 1-3/4") (1215 in-lbs.)
  • Page 12 • Thread diameter and appropriate tightening torque • • 3000 (2604 in-lbs.) Strength grade 12.9 2500 (high-strength bolt) (2170 in-lbs.) 2000 Strength grade 8.8 (1736 in-lbs.) (high-strength bolt) 1500 (1302 in-lbs.) Strength grade 6.8 1000 (ordinary bolt) (868 in-lbs.) Strength grade 4.8 (ordinary bolt) (434 in-lbs.) (1/4")

  • Page 13: Number Of Screws Driven

    1,230 (M8 x 16 mm) Note 1) The Model WH 14DM is equipped with the larger hammer and the higher power motor for the higher tightening speed. Although the higher tightening speed is realized, the Model WH 14DM has the following disadvantage.

  • Page 14: Precautions In Sales Promotion

    8-1. Safety Instructions In the interest of promoting the safest and most efficient use of Model WH 14DM 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 15 Ensure that all customers understand that Type EB 14B or EB 1430H 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 16: Tightening Torque Inspection Prior To Operation

    8-2. Tightening Torque Inspection prior to Operation As described and shown in Para. 7-2-3, the output tightening torque of which the Model WH 14DM 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 17: Suggestions And Precautions For The Efficient Use Of The Charger

    (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 or drill bit, and/or hexagonal portion of the driver chuck which is fitted onto the anvil in the main body will become worn and loose.

  • Page 18: Repair Guide

    10. REPAIR GUIDE WARNING: Without fail, remove the Type EB 14B or EB 1430H 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 could cause serious injury.
  • Page 19 (2) Removal of the Front Cap [5] and the Protector [6] Remove the Front Cap [5] and Protector [6] from the Hammer Case [8] using a small flat-blade screwdriver. (3) Removal of the Hammer Case [8] and the hammer assembly Remove the four Tapping Screws (W/Sp.
  • Page 20 (7) Removal of Housing (B) [35] Remove the seven Tapping Screws (W/Flange) D4 x 20 (Black) [32] and a Machine Screw (W/Washers) M4 x 25 [46] from the main body. After removal of the Machine Screw (W/Washers) M4 x 25 [46], the Strap (Black) [44] and the Sleeve [45] can be removed.
  • Page 21 (11) Removal of the Armature DC 14.4V [26] [21] Support the Inner Cover [25] so that it does not contact the fan of [22] the Armature DC 14.4V [26]. With a hand press, push down the [23] tip portion of the Armature DC 14.4V [26] (pinion) to remove it. [24] (12) Removal of Ring Gear (C) [21] and the Damper [24] [25]...
  • Page 22 (c) Mount a unit of the Inner Cover [25] (including the Armature DC 14.4V [26]), Magnet (C) Ass'y [27] (including the Dust Guard Fin [28] and Washer (M) [51]) and Brush Block [29] into Housing (A) [35] (See Fig. 14). Pay attention to the following items.
  • Page 23 Align the projection of housing (A) to the notch of Magnet (C) Ass'y [27]. Housing (A) Fig. 13 (d) Mount the DC-Speed Control Switch [38] to housing (A) so that the protrusion of the forward/reverse lever at the top of the switch is inserted into the U-shaped groove of the Pushing Button [39]. Apply silicone grease (KS609, Shin-Etsu Chemical Co., Ltd.) to the contacting surfaces of the FET of the DC-Speed Control Switch [38] and the Dust Guard Fin [28] then mount them to Housing (A) [35].
  • Page 24 (2) Apply silicone rubber (ThreeBond 1211) to Housing (A) [35] as shown in Fig. 16. Mount housing (B) to housing (A) and secure them with seven Tapping Screws (W/Flange) D4 x 20 (Black) [32]. Wipe the silicone rubber coming out of the housing with cloth. Insert the Sleeve [45] into the Strap (Black) [44] and tighten the Machine Screw (W/Washers) M4 x 25 [46].

  • Page 25: Precautions In Disassembly And Reassembly Of Battery Charger

    • Two Steel Balls D5.556 [11] • Metal oil groove of the Hammer Case [8] (b) HITACHI MOTOR GREASE No. 29 • Two Steel Balls D3.97 [9] • Sliding section between Anvil (C) [10] and Guide Sleeve [4] (10) Screw tightening torque •...

  • Page 26: Standard Repair Time (Unit) Schedules

    11. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow WH 14DM DC-Speed Control Switch Housing (A).(B) Set Hook Ass'y Inner Cover Armature Magnet (C) Ass'y Brush Block General Assembly Guide Sleeve Hammer Case Hammer (E) Anvil (C)
  • Page 27 Hitachi Power Tools LIST NO. F884 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT DRIVER 2003 • • Model WH 14DM (E1)
  • Page 28 PARTS WH 14DM ITEM CODE NO. DESCRIPTION REMARKS USED 317-530 RETAINING RING 318-394 RETAINER 317-528 GUIDE SPRING 322-077 GUIDE SLEEVE 320-418 FRONT CAP 322-076 PROTECTOR 319-917 TAPPING SCREW (W/SP. WASHER) D4X25 (BLACK) 322-075 HAMMER CASE 959-155 STEEL BALL D3.97 (10 PCS.)

  • Page 29: Standard Accessories

    STANDARD ACCESSORIES WH 14DM ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 14YF2) 322-070 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 321-823 DRILL CHUCK AND ADAPTER SET 1 INCLUD. 616, 618 309-922 GREASE FOR IMPACT DRIVER (500G) 992-671 + DRIVER BIT (B) NO.2 50L...
  • Page 30 WH 14DM ITEM CODE NO. DESCRIPTION REMARKS USED --- 4 --- 6 -- 03 Printed in Japan (030605N)

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