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Hitachi DH 40MEY Service Manual
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Hitachi DH 40MEY Service Manual

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Download this manual See also: Operation Manual & Safety Instructions
PRODUCT NAME
Hitachi Rotary Hammer
DH 40MEY
Model
CONTENTS
TROUBLESHOOTING GUIDE --------------------------------------------------------------------------------------------- 1
1. Troubleshooting and corrective action --------------------------------------------------------------------- 1
REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 3
1. Precautions on disassembly and reassembly ----------------------------------------------------------- 3
STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------------ 19
LIST No.
DH 40MEY: F425
Dec. 2014
Page
International Sales Division
D

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Summary of Contents for Hitachi DH 40MEY

  • Page 1: Table Of Contents

    LIST No. DH 40MEY: F425 Dec. 2014 PRODUCT NAME Hitachi Rotary Hammer DH 40MEY Model CONTENTS Page TROUBLESHOOTING GUIDE --------------------------------------------------------------------------------------------- 1 1. Troubleshooting and corrective action --------------------------------------------------------------------- 1 REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 3 1. Precautions on disassembly and reassembly ----------------------------------------------------------- 3...

  • Page 2: Troubleshooting Guide

    [Bold] numbers in the description below correspond to the item numbers in the Parts List and exploded assembly diagram for the Model DH 40MEY. TROUBLESHOOTING GUIDE 1. Troubleshooting and corrective action Perform troubleshooting and take a necessary corrective action according to the table below if there is a problem that cannot be solved by the corrective action described in the Handling Instructions.
  • Page 3 Problem Cause Check Corrective action • Improperly • Check the plug-in state of the • Firmly plug the connected connector cable. connector cable. connector cable of (See “Reassembly of the the Panel [112] power supply unit” on page 12.) • Internal wires •...

  • Page 4: Repair Guide

    REPAIR GUIDE 1. Precautions on disassembly and reassembly WARNING: Be sure to disconnect the power cord plug from the wall outlet before conducting repair. Otherwise, the motor may run suddenly and you could get injured. Disassembly 1. Disassembly of the tool retainer Remove the Front Cap [1] while pulling the Grip [2] in the arrow direction.
  • Page 5 Fig. 3 Cylinder case ass'y [15] [16] [17] [19] [22] [24] [21] [23] [30] [32] [33] [31] [26] [25] [29] [28] Crank case ass'y (2) Piston ass’y You can remove the piston ass’y from the main body without disassembling the Bevel Gear [34] and Slip Clutch Ass’y [114].
  • Page 6 (3) First gear and crank shaft Remove the Bolt M5 x 16 [66] and detach the Crank Cover [101] from the Crank Case [89]. Then take out the Change Plate [105] and Slider [33] from the Crank Case [89]. Remove the Bolt M5 x 16 [66] and Bolt M5 x 12 [53], and then detach Handle (A) [64], Handle (B) [55], and the Back Cover [60].
  • Page 7 3. Disassembly of the motor Firmly hold the Housing [48] and use a plastic Fig. 7 hammer to tap the shaft of the Rotor [134] until the spigot joint of the Gear Cover [130] is removed from [130] the Housing [48]. The Rotor [134] has strong magnetic force.
  • Page 8 Reassembly Reassembly can be accomplished by reversing the disassembly procedure. However, special attention should be given to the following items. 1. Reassembly of the hammering mechanism and low vibration mechanism (1) First gear and crank shaft Press-fit Oil Seal (B) [88] to the Crank Fig.
  • Page 9 (3) Cylinder and retainer sleeve Mount the Retainer Damper Washer [17], Retainer Damper (B) [16], and the Retainer Damper Holder [15] in this order to the Retainer Sleeve [19] with the rounded surface of the Retainer Damper Washer [17] facing that of the Retainer Sleeve [19] and the rounded surface of the Retainer Damper Holder [15] facing that of the Retainer Sleeve [19].
  • Page 10 Bevel Pinion [115] and press-fit the Gear Holder [121]. Insert the Second Gear [124] into the outer periphery of the Gear Holder [121]. Apply Hitachi Motor Grease No. 29 to the inner periphery of the Second Gear [124] in advance. Insert the ten Needles [122] upright as shown below, and then push in ten Springs (C) [123].
  • Page 11 (6) Reassembly of the low vibration mechanism (a) Apply specified grease to the inner periphery of the metals in the Crank Case [89] and fill the space between the metals with the specified grease (0.5 to 1.0 g). Specified grease is required to maintain the low-vibration effect.
  • Page 12 (c) Firmly fit each Weight Spring [92] to each Weight [91] groove and Crank Case [89] groove as shown below when assembling the four Weight Springs [92] to the Weights [91]. Note that the low-vibration effect is lost in case a weight spring comes off due to vibration during work. Fig.
  • Page 13 (8) Reassembly of the valve and felt Make sure the Valve [111] is inserted in the Crank Case [89]. Grease will leak without the Valve [111]. After inserting the Valve [111], lock it with the Cap Screw [110]. Degrease the felt attaching portion of the Crank Case [89], and then attach Felt (A) [109] with the hole on Felt (A) [109] matching the hole on the Cap Screw [110].
  • Page 14 (4) Wiring of the switch (See Fig. 18.) • Connect the two core-exposed internal wires of the Controller Set [49] to the terminals No. 2 and No. 3 of the switch. These internal wires are interchangeable. (5) Wiring of the cord (See Fig. 18.) •...
  • Page 15 Retainer Sleeve [19]. Hitachi Motor Grease No. 29 • Fill a total of 20 g of Hitachi Motor Grease No. 29 in the Crank Case [89] on the First Gear [128] side and the Gear Cover [130] side. • Apply Hitachi Motor Grease No. 29 to the Needle Bearing (M661) [129], pinion portion of the Rotor [134], and the Bit Lock [18].
  • Page 16 Fig. 20 Fig. 21 Crank Case [89] Slider [33] Crank Case [89] Metal Fill 60 g of grease. Crank Case [89] (Fill the space between the metals with 0.5 to 1.0 g of grease.) Fig. 22 (1) Apply specified grease to the Cylinder [25] (inner and outer diameter portions), Striker [26], and O-ring [27]. (2) Insert the Striker [26] into the Cylinder [25] in the arrow direction until it contacts the innermost end.
  • Page 17 Fig. 25 Crank Case [89] Metal Weight Shaft [93] Apply grease to the inner diameter portion of the metal (on both sides of the crank case.) -16-...

  • Page 18: Tightening Torque

    Tightening torque Be sure to apply TB1401 screw locking agent to the threads of the following screws and bolts. Otherwise, the screw or bolt loosened by vibration may cause damage to the tool body. +0.98 M8 Cap Screw [110] ··························································· 3.92 N•m (40 kgf•cm) +1.96...
  • Page 19 Connecting diagram Fig. 26 • Wiring diagram Panel Switch board 8-wire Black Black Cord Stator sensor Filter White White Controller set board set board set Black Black Pillar terminal 5-wire -18-...

  • Page 20: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL Fixed Work Flow DH 40MEY Handle (B) Back Cover Controller Housing Handle (A) Transatory Stator Switch Unit Panel Sensor Filter PCB Set PCB Set Cord Gear Cover Cord Armor Rotor Ball Bearing 6201DD...
  • Page 21 LIST NO. F425 ROTARY HAMMER 2014·12·23 Model DH 40MEY (E1)
  • Page 22 PARTS DH 40MEY ITEM DESCRIPTION REMARKS CODE NO. USED 337562 FRONT CAP 337560 GRIP 318590 STOPPER RING 337561 RETAINER WASHER 337559 RETAINER DAMPER (A) 337558 BIT LOCK HOLDER 337555 THRUST PLATE 337556 RETAINER SPRING 337557 SPRING HOLDER (A) 998471 HEX. SOCKET HD. BOLT (W/FLANGE) M5 X 12...
  • Page 23 PARTS DH 40MEY ITEM DESCRIPTION REMARKS CODE NO. USED 337580 CONTROLLER SET 220V-240V 322530 VINYL TUBE L55 322530 VINYL TUBE L55 321322 VINYL TUBE L35 991690 SEAL LOCK HEX. SOCKET HD. BOLT M5 X 12 991711 DISTANCE PIECE (B) 337590...
  • Page 24 PARTS DH 40MEY ITEM DESCRIPTION REMARKS CODE NO. USED 337569 WEIGHT 337572 WEIGHT SPRING 337570 WEIGHT SHAFT 944109 FEATHER KEY 3 X 3 X 8 337592 CRANK CASE COVER 337567 LEVER SPRING 959149 STEEL BALL D4.76 (10 PCS.) 307811 TAPPING SCREW (W/FLANGE) D4 X 16 (BLACK)

  • Page 25: Optional Accessories

    STANDARD ACCESSORIES DH 40MEY ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 981840 GREASE (A) FOR HAMMER.HAMMER DRILL (30G) 337594 CASE (PLASTIC) 971786 STOPPER ROD OPTIONAL ACCESSORIES ITEM DESCRIPTION REMARKS CODE NO. USED 335782 GREASE FOR ROTARY HAMMER (60G) 335781...
  • Page 26 OPTIONAL ACCESSORIES DH 40MEY ITEM CODE NO. DESCRIPTION REMARKS USED 955998 CORE BIT 35MM INCLUD.632 955999 GUIDE PLATE (FOR CORE BIT 35MM) 956000 CORE BIT 38MM INCLUD.634 956001 GUIDE PLATE (FOR CORE BIT 38MM) 955154 CORE BIT 45MM INCLUD.636 955166...