Koki Holdings G 10BYEQ2 Service Manual

Electronic disc grinder

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PRODUCT NAME
Electronic Disc Grinder
Models 100 mm (4")
115 mm (4-1/2")
125 mm (5")
CONTENTS
REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 1
1. Precautions on disassembly and reassembly ----------------------------------------------------------- 1
• Disassembly ------------------------------------------------------------------------------------------------- 1
• Reassembly -------------------------------------------------------------------------------------------------- 4
• Lubrication point and type of lubricant ----------------------------------------------------------------- 6
• Tightening torque ------------------------------------------------------------------------------------------- 6
• Checking after reassembly ------------------------------------------------------------------------------- 6
• Insulation test ------------------------------------------------------------------------------------------------ 6
• No-load current value -------------------------------------------------------------------------------------- 7
• Connecting diagram ---------------------------------------------------------------------------------------- 7
G 10BYEQ2
G 12BYEQ2
G 13BYEQ2
G 13BYEQ2
Overseas Sales Management Dept.
CONFIDENTIAL
Oct. 2022
Page
G
G

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Summary of Contents for Koki Holdings G 10BYEQ2

  • Page 1: Table Of Contents

    CONFIDENTIAL Oct. 2022 PRODUCT NAME Electronic Disc Grinder G 10BYEQ2 Models 100 mm (4”) G 12BYEQ2 115 mm (4-1/2") G 13BYEQ2 125 mm (5”) CONTENTS Page REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 1 1. Precautions on disassembly and reassembly ----------------------------------------------------------- 1 • Disassembly ------------------------------------------------------------------------------------------------- 1 •...
  • Page 2: Repair Guide

    [Bold] numbers in the description below correspond to the item numbers in the parts list and exploded assembly diagram of the Model G 10BYEQ2, {Bold} numbers to those of the Model G 12BYEQ2, and <Bold> numbers to those of the Model G 13BYEQ2.
  • Page 3 Ball Bearing 608DD [9]{9}<9>. (11) Remove the Dust Seal [8]{8}<8> from the rotor shaft. 3. Removal of the gear (Model G 10BYEQ2) (1) Loosen the four Seal Lock Screws (W/Sp. Washer) M4 x 12 [21] and remove Packing Gland (A) [20] from the Gear Cover Ass’y [3].
  • Page 4 4. Removal of the gear (Models G 12BYEQ2 and G 13BYEQ2) (1) Loosen the three Seal Lock Screws (W/Washer) M4 x 12 {18}<18> and the Seal Lock Screw (W/Sp. Washer) M5 x 16 {20}<20>, and remove the Packing Gland {17}<17> from the Gear Cover Ass’y {3}<3>. (2) Remove the Retaining Ring for D12 Shaft {15}<15>...
  • Page 5: Reassembly

    Fig. 6 • Mounting direction of belleville springs (A) and (B) [23] {25}<25> G 10BYEQ2 G 12BYEQ2/G 13BYEQ2 (5) When replacing the Rotor [7]{7}<7> and Ball Bearing 608DD [9]{9}<9>, press-fit the Dust Seal [8]{8}<8> in proper direction until the end face of the Dust Seal [8]{8}<8> contacts the butting surface of the Rotor [7]{7}<7>, and check that the Dust Seal [8]{8}<8>...
  • Page 6 (9) To prevent damage to the Controller [37]{40}<40>, avoid contact of the Controller [37]{40}<40> with the tip of the Switch Lever [35]{38}<38> when mounting the Controller [37]{40}<40> to the Housing [33]{36}<36>. Also be careful not to pinch the internal wires. (10) Insert the Fastons [12]{12}<12>...
  • Page 7: Lubrication Point And Type Of Lubricant

    Lubrication point and type of lubricant Please purchase the following grease as necessary. Item Registered part name Net weight Code No. Cosmo KMC No. 1 Grease (Cosmo grease KMC No. 1) 75 g 75 g 378134 Tightening torque Tightening torque Item No.
  • Page 8: Load Current Value

    No-load current value After no-load operation for 30 minutes, the no-load current values should be as follows. Voltage 120 V 220V 230 V 240 V Current 2.3 to 3.1 A 1.2 to 1.7 A 1.1 to 1.6 A 1.1 to 1.5 A Connecting diagram Fig.
  • Page 9 M O D E L G10BYEQ2 Rev.1...
  • Page 10 ITEM CODE DESCRIPTION REMARKS USED 328643 TAPPING SCREW (W/FLANGE) D4 X 23 (BLACK) 378809 PUSHING BUTTON 378810 GEAR COVER ASS'Y INCLUD. 2, 14 309191 SPECIAL NUT M6 378615 BALL BEARING 628DD 378812 BEARING HOLDER 361177 ROTOR 379725 DUST SEAL 608DDM BALL BEARING 608DD 378808 FAN GUIDE 341130E STATOR ASS'Y (A) 220 V-240 V INCLUD.
  • Page 11 M O D E L G12BYEQ2 Rev.1...
  • Page 12 ITEM CODE DESCRIPTION REMARKS USED 328643 TAPPING SCREW (W/FLANGE) D4 X 23 (BLACK) 378809 PUSHING BUTTON 378811 GEAR COVER ASS'Y INCLUD. 2, 14 301941 SPECIAL NUT M7 378615 BALL BEARING 628DD 378812 BEARING HOLDER 361178 ROTOR 379725 DUST SEAL 608DDM BALL BEARING 608DD 378808 FAN GUIDE 341130C STATOR ASS'Y (A) 110 V-120 V INCLUD.
  • Page 13 M O D E L G13BYEQ2 Rev.1...
  • Page 14 ITEM CODE DESCRIPTION USED REMARKS 328643 TAPPING SCREW (W/FLANGE) D4 X 23 (BLACK) 378809 PUSHING BUTTON 378811 GEAR COVER ASS'Y INCLUD. 2, 14 301941 SPECIAL NUT M7 378615 BALL BEARING 628DD 378812 BEARING HOLDER 361178 ROTOR 379725 DUST SEAL 608DDM BALL BEARING 608DD 378808 FAN GUIDE 341130C STATOR ASS'Y (A) 110 V-120 V INCLUD.
  • Page 15 ITEM CODE DESCRIPTION REMARKS USED *606 314064 SANDING DISCS 125 MM C-P24 (10 PCS.) EXCEPT FOR USA, CAN *607 314065 SANDING DISCS 125 MM C-P30 (10 PCS.) EXCEPT FOR USA, CAN *608 314066 SANDING DISCS 125 MM C-P36 (10 PCS.) EXCEPT FOR USA, CAN *609 314067 SANDING DISCS 125 MM C-P40 (10 PCS.)

This manual is also suitable for:

G 12byeq2G 13byeq2

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