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Hitachi DH 52ME Service Manual
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Hitachi DH 52ME Service Manual

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PRODUCT NAME
Hitachi Rotary Hammer
DH 52ME
Models
DH 52MEY
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 52ME: F426
DH 52MEY: F427
May 2015
Page
Overseas Sales Division
D

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Summary of Contents for Hitachi DH 52ME

  • Page 1: Table Of Contents

    LIST No. DH 52ME: F426 DH 52MEY: F427 May 2015 PRODUCT NAME Hitachi Rotary Hammer DH 52ME Models DH 52MEY 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 52ME, {Bold} numbers to those for the Model DH 52MEY, and <Bold> numbers to the item numbers for all models.
  • Page 3 Problem Cause Check Corrective action • Improperly • Check the plug-in state of the • Firmly plug in the connected connector cable. connector cable. connector cable of (See “2. Reassembly of the the Panel Ass’y power supply unit” on page <67>...

  • 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>...
  • Page 5 (f) Turn the Retainer Sleeve <26> and pull out the eight Needle Pins D8 <27> from the Retainer Sleeve <26> to separate the Retainer Sleeve <26> from the Cylinder <33>. (g) Remove the Second Hammer <29> together with the Damper Holder <32>, Damper <31>, and Damper Washer <30>...
  • Page 6 • Removal of the piston ass’y <50> [102] {101} [103] {102} Piston ass'y Crank case ass'y (3) Removal of the first gear and crank shaft (a) Remove the Bolt M5 x 12 <68> and Screw D4 x 25 <79>, and then detach Handle (A) <70> and Handle (B) <78>.
  • Page 7 (4) Removal of the slip clutch ass’y (a) Use a bearing puller to remove the Ball • Removal of the slip clutch Bearing 629VV [138] {148}. (b) Use an adequate sleeve-like cradle to support Washer (A) [132] {142} as shown below.
  • Page 8 Reassembly Reassembly can be conducted 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) Mounting the first gear and crank shaft (a) Press-fit Oil Seal [124] {134} to the Crank Case [125] {135}.
  • Page 9 (b) Insert the Cylinder <33> into the Retainer Sleeve <26> and insert eight Needle Pins D8 <27> into the 8 mm dia. hole to connect them. To avoid dropping, apply Hitachi Motor Grease No. 29 to the inside of Spring Holder (B) <36> lightly and then cover the needle pin insertion section of the Retainer Sleeve <26>...
  • Page 10 • Mounting the cylinder and retainer sleeve Pay attention to the direction of the Retainer Damper Avoid the Oil Seal <17> Washer <24> and Damper Washer <31>. from being turned up. Insert position of the Lock Spring Washer <37> Position the slider groove upward. Engage the Clutch <41>...
  • Page 11 Section A—A (5) Reassembly of the vibration reduction mechanism (a) Apply Hitachi Motor Grease No. 29 to the Washer {109} and adhere it to the end face of the hole portion of the Weight {110}. (b) Insert the Weight {110} into the Base {116}, and then insert the Weight Pin {112}.
  • Page 12 (6) Reassembly of the lever shaft holder ass’y (a) Apply Hitachi Motor Grease No. 29 to the O-ring (S-18) [116] {125}, and then attach the O-ring to the Change Lever [113] {122}. Insert the Lever Spring [114] {123} into the change lever hole.
  • Page 13 (8) Mounting the crank cover (a) Insert the stepped portion of the Change Plate [120] {129} into the notch of the Slider <43>. NOTE: Be sure to insert the stepped portion in the right direction according to the figure below. (b) Attach O-ring (A) [119] {128} to the lower outer circumference of the Lever Shaft Holder [117] {126} and set the Change Lever [113] {122} to the position of “Rotation + hammering”...
  • Page 14 (d) Pass the three connectors of the Controller Ass’y <63> through the lower window of the Back Cover <87>, and then insert the connectors into those of On Lock PCB (A) Ass’y <92>. NOTE: Do not insert the connectors in the wrong direction. (e) Insert the three connectors of On Lock PCB (B) [109] {111} into the connectors of the Controller Ass’y <63>.
  • Page 15 (7) Mounting handles (A) and (B) (a) Insert the Handle Shaft <86> into Handle (A) <70> and fix it with the Screw D4 x 25 <79>. (b) Insert the Cord <85> and Cord Armor <82> and then fix the Cord Clip <83> with the Screw D4 x 16 <84>.
  • Page 16 • Reassembly of power supply unit <54> <67> Interchangeable wires <77> [109] {111} Check the connector orientation. <92> Check the connector orientation. Check the connector orientation. Check the connector orientation. Interchangeable White wires Black Black <85> <63> <81> <82> Black Interchangeable wires <71>...
  • Page 17 981840 CAUTION: Both viscosity and consistency of the specified grease are optimized for the rotary hammer Models DH 52ME and DH 52MEY in order to prolong the service life. Therefore, applying ordinary grease intended for other models (e.g. Model DH 40MEY) to the Models DH 52ME and DH 52MEY may dramatically shorten the product’s service life.
  • Page 18 • Application of Hitachi Motor Grease No. 29 to the weight pin and leaf spring (B) Weight Ass’y {109} Apply grease to the sliding portions with the weight. Washer {110} Apply grease to the sliding surface of the outside. Apply grease to both sides and...
  • Page 19 Insulation test After completing disassembly and repair, measure the insulation resistance and dielectric strength. Insulation resistance: 7 M or higher (as measured with a 500 VDC megohm tester) Dielectric strength: 4,000 VAC/1 minute, with no abnormalities --- 220 to 240 V and 110 V for UK products 2,500 VAC/1 minute, with no abnormalities --- 110 to 127 V (Except UK products) No-load current value After no-load operation for 30 minutes, the no-load current values should be as follows:...

  • Page 20: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL Fixed Work Flow DH 52ME Handle (A) Back Cover Controller Housing Handle (B) Transatory Ass’y Stator Switch Unit Panel Ass’y Sensor Filter PCB Set PCB Ass’y Gear Cover Cord Rotor Ass’y Cord Armor...
  • Page 21 Variable MODEL Fixed Work Flow DH 52MEY Handle (A) Back Cover Controller Housing Handle (B) Transatory Ass’y Stator Switch Unit Panel Ass’y Sensor Filter PCB Set PCB Ass’y Gear Cover Cord Rotor Ass’y Cord Armor Ball Bearing 6202DD Ball Bearing Tail Cover 6201VV General assembly...
  • Page 22 LIST NO. F426 ROTARY HAMMER 2015·5·13 Model DH 52ME (E1)
  • Page 23 PARTS DH 52ME ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 337562 FRONT CAP 318590 STOPPER RING 338155 RETAINER WASHER 339053 RETAINER DAMPER (A) 338154 GRIP 338153 BIT LOCK HOLDER 339051 THRUST PLATE 339052 RETAINER SPRING 337557 SPRING HOLDER (A)
  • Page 24 PARTS DH 52ME ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 944954 BEARING WASHER 6201VV BALL BEARING 6201VVCMPS2L 961501 HEX. HD. TAPPING SCREW D5 X 60 340898 STATOR SENSOR PCB SET 100V-127V TILL 12.2014 340921 STATOR FET PCB SET 100V-127V SINCE 2.2015...
  • Page 25 PARTS DH 52ME ITEM DESCRIPTION REMARKS CODE NO. USED 500206Z CORD (CORD ARMOR D10.7) FOR PHI 500457Z CORD (CORD ARMOR D10.7) FOR CHN 500502Z CORD (CORD ARMOR D10.7) FOR TPE 500488Z CORD (CORD ARMOR D8.2) FOR BRA 338175 HANDLE SHAFT...
  • Page 26 PARTS DH 52ME ITEM DESCRIPTION REMARKS CODE NO. USED 338231 WASHER (A) 318554 GEAR HOLDER 313057 NEEDLE PIN D6 X 6 329095 SPRING (C) 338232 SECOND GEAR 338233 SPACER 629VVM BALL BEARING 629VVC2PS2L 338225 FIRST GEAR 338226 SECOND PINION 629VVM...
  • Page 27 OPTIONAL ACCESSORIES DH 52ME ITEM CODE NO. DESCRIPTION REMARKS USED 308471 GREASE FOR HAMMER.HAMMER DRILL (70G) 980927 GREASE FOR HAMMER.HAMMER DRILL (500G) 320859 SYRINGE (BLOW-OUT BULB TYPE) 318085 SYRINGE (BELLOWS TYPE) 313448 DRILL BIT (SDS MAX) D16 X 340 313456...
  • Page 28 OPTIONAL ACCESSORIES DH 52ME ITEM CODE NO. DESCRIPTION REMARKS USED 313466 CORE BIT SHANK (B) SDS MAX D25-35 313467 CORE BIT SHANK (A) SDS MAX D38-150 956009 CENTER PIN (B) 147L FOR CORE BIT D32-35 955165 CENTER PIN (A) 133L FOR CORE BIT D38-150...
  • Page 29 LIST NO. F427 ROTARY HAMMER 2015·5·13 Model DH 52MEY (E1)
  • Page 30 PARTS DH 52MEY ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 337562 FRONT CAP 318590 STOPPER RING 338155 RETAINER WASHER 339053 RETAINER DAMPER (A) 338154 GRIP 338153 BIT LOCK HOLDER 339051 THRUST PLATE 339052 RETAINER SPRING 337557 SPRING HOLDER (A) 872470 O-RING (S-26) 338198...
  • Page 31 PARTS DH 52MEY ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 944954 BEARING WASHER 6201VV BALL BEARING 6201VVCMPS2L 961501 HEX. HD. TAPPING SCREW D5 X 60 340898 STATOR SENSOR PCB SET 100V-127V TILL 12.2014 340921 STATOR FET PCB SET 100V-127V SINCE 2.2015 340899 STATOR SENSOR PCB SET 220V-240V...
  • Page 32 PARTS DH 52MEY ITEM DESCRIPTION REMARKS CODE NO. USED 500457Z CORD (CORD ARMOR D10.7) FOR CHN 338175 HANDLE SHAFT 338197 BACK COVER 994192 HEX. SOCKET HD. BOLT (W/FLANGE) M5 X 16 NAME PLATE 338171 ON LOCK BUTTON 338172 ON LOCK SPRING 338185 ON LOCK PCB (A) ASS'Y INCLUD.93...
  • Page 33 PARTS DH 52MEY ITEM DESCRIPTION REMARKS CODE NO. USED 338223 CRANK CASE 338242 SLIP CLUTCH ASS'Y INCLUD.137-148 338229 BEVEL PINION 944109 FEATHER KEY 3 X 3 X 8 338230 COLLAR 6202DD BALL BEARING 6202DDCMPS2L 313058 WASHER 338231 WASHER (A) 318554 GEAR HOLDER 313057 NEEDLE PIN D6 X 6...
  • Page 34 OPTIONAL ACCESSORIES DH 52MEY ITEM CODE NO. DESCRIPTION REMARKS USED 308471 GREASE FOR HAMMER.HAMMER DRILL (70G) 980927 GREASE FOR HAMMER.HAMMER DRILL (500G) 320859 SYRINGE (BLOW-OUT BULB TYPE) 318085 SYRINGE (BELLOWS TYPE) 313448 DRILL BIT (SDS MAX) D16 X 340 313456 DRILL BIT (SDS MAX) D16 X 540 313449 DRILL BIT (SDS MAX) D19 X 340...
  • Page 35 OPTIONAL ACCESSORIES DH 52MEY ITEM CODE NO. DESCRIPTION REMARKS USED 313466 CORE BIT SHANK (B) SDS MAX D25-35 313467 CORE BIT SHANK (A) SDS MAX D38-150 956009 CENTER PIN (B) 147L FOR CORE BIT D32-35 955165 CENTER PIN (A) 133L FOR CORE BIT D38-150 321813 DRILL CHUCK 13VLD-D 313468...

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