Hitachi G 12VA Technical Data And Service Manual
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Hitachi G 12VA Technical Data And Service Manual

Hitachi G 12VA Technical Data And Service Manual

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PRODUCT NAME
Hitachi Electronic Disc Grinder
Models
115 mm (4")
125 mm (5")
150 mm (6")
MARKETING OBJECTIVE
These product are high-performance, highly functional electronic disc grinders incorporating a 1500-watt power
input and a slide switch. We aim to expand our market share with these products that can provide added value in
the high-end product markets in Europe and other regions, where there is a growing demand for powerful and
functionally advanced electronic disc grinders.
APPLICATIONS
• Removal of casting fins and the finishing of various types of steel, bronze, aluminum and various other
metallic materials
• Grinding of welds or sections cut by a cutting torch
• Grinding of synthetic resins, slate, brick, marble, and other materials
SELLING POINTS
[ NEW FEATURES ]
Equipped with four existing electronic controls
+ two most advanced controls
1. Constant speed control
2. Soft-start speed control
3. Variable speed control (G 12VA, G 13VA and G 15VA)
4. Overload protection control
+
5. Kickback protection control
6. 0-voltage restart protection control
Equipped with most powerful motor in its class
Excellent overload durability (G 13VA)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
G 12VA
G 13VA, G 13YF
G 15VA, G 15YF
LIST Nos.
G 12VA : E296
G 13VA : E297
G 13YF: E299
G 15VA : E298
G 15YF: F201
Aug. 2009
Sales Division
G

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Summary of Contents for Hitachi G 12VA

  • Page 1 Equipped with four existing electronic controls + two most advanced controls 1. Constant speed control 2. Soft-start speed control 3. Variable speed control (G 12VA, G 13VA and G 15VA) 4. Overload protection control 5. Kickback protection control 6. 0-voltage restart protection control...
  • Page 2 • For more information about HANDLING INSTRUCTIONS, visit our website at: http://www.hitachi-koki.com/manual_view_export/ • 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: G 12VA Competitors Symbols Utilized Company Name...

  • Page 3: Table Of Contents

    4. Operation Phenomena to Note in Sales Promotion------------------------------------------------------ 9 REPAIR GUIDE---------------------------------------------------------------------------------------------------------------- 11 1. Precautions on Disassembly and Reassembly --------------------------------------------------------- 11 STANDARD REPAIR TIME (UNIT) SCHEDULES-------------------------------------------------------------------- 17 Assembly Diagram for G 12VA Assembly Diagram for G 13VA Assembly Diagram for G 13YF Assembly Diagram for G 15VA...

  • Page 4: Selling Point Descriptions

    (2) soft-start speed control, (3) variable speed control (on Models G 12VA, G 13VA and G 15VA), and (4) overload protection control—and two new additional control features—(5) kickback protection control and (6) 0-voltage restart protection control.

  • Page 5: Specifications

    1430 13.0 1500 Voltage and power input 12.4 1500 1500 1430 G 12VA, G 13VA: 2,800 to 10,500/min G 15VA: 2,300 to 9,000/min No-load speed G 13YF: 10,500/min G 15YF: 9,000/min Type of motor AC single-phase commutator motor Housing (black)

  • Page 6: Comparisons With Similar Products

    • Relation between dial settings and rotation speeds of Models G 12VA, G 13VA and G 15VA (Reference) Model G 15VA Models G 12VA and G 13VA 10000 12000 10000 8000 8000 6000 6000 4000 4000 2000 2000 DIAL DIAL...
  • Page 7 (Superior specifications: Maker HITACHI G 13VA Model name G 13YF Capacity: (mm) 125 (5”) 125 (5”) 125 (5”) Dia. of depressed center wheel Power Input 1,500 1,400 1,400 Power output Max power output 2,800 2,100 2,650 2,800 to 10,500 2,800 to 11,000...
  • Page 8 (Superior specifications: Maker HITACHI G 15VA Model name G 15YF Capacity: (mm) 150 (6”) 150 (6”) 150 (6”) Dia. of depressed center wheel Power Input 1,500 1,400 1,400 Power output Max power output 2,800 2,100 2,650 2,300 to 9,000 9,300...

  • Page 9: Precautions On Sales Promotion

    1. Safety Instructions In the interest of promoting the safest and most efficient use of the Models G 12VA, G 13VA, G 13YF, G 15VA and G 15YF Electronic Disc Grinders by all of our customers, it is very important that when...

  • Page 10: Control Circuit Functions And Operation

    Afin de reduire le risque de blessures, I'utilisateur doit lire et bien comprendre le mode d'emploi. Utilisez toujours un outil muni d'un protecteur et portez des lunettes on une visiere. N'utilisez que des accessoires prevus pour au moins * /min. * G 12VA : 13,300 G 13VA, G 13YF : 12,000...

  • Page 11: Precautions On Usage

    (2) Motor characteristics and voltage applied to the motor Phase control voltage waveform Fig. 2 G 13VA G 13YF *1 : G 12VA, G 15VA G 13VA *2 : G 15YF G 13VA 3. Precautions on Usage (1) Never press the pushing button while the depressed center wheel is rotating.

  • Page 12: Operation Phenomena To Note In Sales Promotion

    The customer should be advised that the Models G 12VA, G 13VA, G 13YF, G 15VA and G 15YF are specifically designed to perform more efficiently and faster with considerably less pressure applied than that required for conventional disc grinders, and that skillful use of the tools with minimal applied pressure will avoid actuating overload protection control.
  • Page 13 In such case (of abnormally high rotation speed), the operator will hear abnormal noise from the motor and/or gears. If such a phenomenon occurs, the customer should immediately shut off the tool, and then bring it to the nearest Hitachi authorized sales outlet or repair center for inspection and repair.

  • Page 14: Repair Guide

    The [Bold] numbers in the descriptions below correspond to numbers in the Parts List and exploded assembly diagrams for the Models G 12VA, G 13VA, G 13YF; the <Bold> numbers correspond to those in the Parts List and exploded assembly diagrams for the Models G 15VA and G 15YF.
  • Page 15 2. Disassembly of the dust seal (1) Remove the Magnet [18] <19>. (Note that the magnet features a left-hand thread.) (2) Insert the hooks of the J-204 Bearing Puller between the commutator and Dust Seal (A) [16] <17> from both sides, and then fix the hooks with the wing bolts. (3) Place the J-204 Bearing Puller on a supporting jig and push down on the armature shaft with a hand press to remove Dust Seal (A) [16] <17>...
  • Page 16 4. Removal of the controller and the snap switch (1) Loosen the two Tapping Screws (W/Flange) D4 x 50 (Black) [59] <60> and remove the Tail Cover [57] <58>. (2) Turn the Controller [53] <54> for the Housing [39] <40> in the arrow "A" direction, and then remove the Controller [53] <54>...
  • Page 17 Fig. 8 (6) When replacing the Gear Cover Ass'y [4] <5>, lubricate the needle bearing with mixed oil. Mixed oil: Mixture of Hitachi power tool grease No. 2 (Unilube No. 00) and turbine oil • Mixed ratio ------- 1:1 (weight ratio) •...
  • Page 18 Connection of internal wires and wiring diagrams Connect the internal wires according to Figs. 9 to 11 below. Numbers 1 to 4 in the following figures correspond to the internal wires of the stator. Fig. 9 Fig. 10 Connect to the Carbon Brush Holder Carbon Brush Holder [41] <42>...

  • Page 19: Lubrication Points And Types Of Lubricant

    Pinion chamber of the Gear Cover Ass'y [4] <5> -------COSMO MOLYBDEN No. 2 grease 22 g Generously rub grease onto the gear and the pinion. Needle bearing -------------------------------------------------- Mixed oil 0.5 cc Mixed oil: Mixture of Hitachi power tool grease No. 2 (Unilube No. 00) and turbine oil Mixed ratio1:1 (weight ratio) Tightening torque Tapping Screws D4 [13] <14>...

  • Page 20: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow G 12VA G 13VA G 13YF Wheel Guard Ass’y G 15VA G 15YF Housing Stator Slide Switch Knob Slide Bar General Assembly Spring Pinion Ball Bearing (629T12DD) Bearing...
  • Page 21 LIST NO. E296 DISC GRINDER 2009 8 28 Model G 12VA (E1) G12VA TU01672 Rev.1...
  • Page 22 PARTS G 12VA ITEM CODE NO. DESCRIPTION REMARKS USED 303-255 SEAL LOCK SCREW (W/SP. WASHER) M4 X 10 320-523 TAPPING SCREW D5 X 25 (BLACK) 301-944 PUSHING BUTTON 321-737 GEAR COVER ASS'Y INCLUD. 3, 20 949-558 NUT M8 (10 PCS.)
  • Page 23 PARTS G 12VA ITEM CODE NO. DESCRIPTION REMARKS USED 314-429 SPRING 330-811 SLIDE BAR 938-307 PILLAR TERMINAL 314-603 SWITCH (1P SOLDER TYPE) INCLUD. 50 305-499 MACHINE SCREW (W/WASHER) M3.5 X 6 331-932 INTERNAL WIRE 959-140 CONNECTOR 50091 (10 PCS.) 330-812...
  • Page 24 STANDARD ACCESSORIES G 12VA ITEM CODE NO. DESCRIPTION REMARKS USED 938-332Z WRENCH 325-496 SIDE HANDLE (VIBRATION-ABSORBING) 994-322 SIDE HANDLE FOR USA, CAN, MEX OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-825Z RUBBER PAD 938-317 RUBBER PAD FOR USA, CAN, MEX...
  • Page 25 LIST NO. E297 DISC GRINDER 2009 8 28 Model G 13VA (E1) G13VA TU01673 Rev.1...
  • Page 26 PARTS G 13VA ITEM CODE NO. DESCRIPTION REMARKS USED 303-255 SEAL LOCK SCREW (W/SP. WASHER) M4 X 10 320-523 TAPPING SCREW D5 X 25 (BLACK) 301-944 PUSHING BUTTON 321-737 GEAR COVER ASS'Y INCLUD. 3, 20 949-558 NUT M8 (10 PCS.) 308-543 SEAL RING (A) 980-866...
  • Page 27 NAME PLATE 331-933 TAPPING SCREW (W/FLANGE) D4 X 50 (BLACK) 311-741 TERMINAL 953-327 CORD ARMOR D8.8 HITACHI LABEL 500-234Z CORD (CORD ARMOR D8.8) 500-247Z CORD (CORD ARMOR D8.8) FOR FIN, NOR, SWE, DEN 500-439Z CORD (CORD ARMOR D8.8) FOR AUS, NZL 500-434Z CORD (CORD ARMOR D8.8) FOR USA, CAN...
  • Page 28 STANDARD ACCESSORIES G 13VA ITEM CODE NO. DESCRIPTION REMARKS USED 944-458 HEX. BAR WRENCH 4MM 938-332Z WRENCH 325-496 SIDE HANDLE (VIBRATION-ABSORBING) 994-322 SIDE HANDLE FOR USA, CAN 323-712 CASE FOR EUROPE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-825Z RUBBER PAD 938-317 RUBBER PAD FOR USA,CAN...
  • Page 29 LIST NO. E299 DISC GRINDER 2009 8 31 Model G 13YF (E1) G13YF TU01675 Rev.1...
  • Page 30 PARTS G 13YF ITEM CODE NO. DESCRIPTION REMARKS USED 303-255 SEAL LOCK SCREW (W/SP. WASHER) M4 X 10 320-523 TAPPING SCREW D5 X 25 (BLACK) 301-944 PUSHING BUTTON 321-737 GEAR COVER ASS'Y INCLUD. 3, 20 949-558 NUT M8 (10 PCS.) 308-543 SEAL RING (A) 980-866...
  • Page 31 EXCEPT FOR CARAT 331-933 TAPPING SCREW (W/FLANGE) D4 X 50 (BLACK) 311-741 TERMINAL 953-327 CORD ARMOR D8.8 HITACHI LABEL EXCEPT FOR CARAT 500-234Z CORD (CORD ARMOR D8.8) 500-247Z CORD (CORD ARMOR D8.8) FOR FIN, NOR, SWE, DEN 500-435Z CORD (CORD ARMOR D8.8) FOR GBR (230V) 500-461Z CORD (CORD ARMOR D8.8) FOR GBR (110V)
  • Page 32 STANDARD ACCESSORIES G 13YF ITEM CODE NO. DESCRIPTION REMARKS USED 944-458 HEX. BAR WRENCH 4MM EXCEPT FOR CARAT 938-332Z WRENCH 325-491 WRENCH FOR CARAT 325-496 SIDE HANDLE (VIBRATION-ABSORBING) 994-322 SIDE HANDLE FOR CARAT 323-712 CASE FOR EUROPE OPTIONAL ACCESSORIES ITEM CODE NO.
  • Page 33 LIST NO. E298 DISC GRINDER 2009 8 31 Model G 15VA (E1) G15VA TU01674 Rev.1...
  • Page 34 PARTS G 15VA ITEM CODE NO. DESCRIPTION REMARKS USED 320-523 TAPPING SCREW D5 X 25 (BLACK) 331-931 STOP PIECE 303-255 SEAL LOCK SCREW (W/SP. WASHER) M4 X 10 301-944 PUSHING BUTTON 321-737 GEAR COVER ASS'Y INCLUD. 4, 21 309-191 SPECIAL NUT M6 308-543 SEAL RING (A) 980-866...
  • Page 35 NAME PLATE 331-933 TAPPING SCREW (W/FLANGE) D4 X 50 (BLACK) 311-741 TERMINAL 953-327 CORD ARMOR D8.8 HITACHI LABEL 500-234Z CORD (CORD ARMOR D8.8) 500-247Z CORD (CORD ARMOR D8.8) FOR FIN, NOR, SWE, DEN 500-434Z CORD (CORD ARMOR D8.8) FOR USA, CAN...
  • Page 36 STANDARD ACCESSORIES G 15VA ITEM ITEM CODE NO. CODE NO. DESCRIPTION REMARKS USED USED 944-458 HEX. BAR WRENCH 4MM 325-491 WRENCH 325-496 SIDE HANDLE (VIBRATION-ABSORBING) 994-322 SIDE HANDLE FOR USA, CAN OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-338 SUPER WASHER EXCEPT FOR USA, CAN - 4 -...
  • Page 37 LIST NO. F201 DISC GRINDER 2009 8 31 Model G 15YF (E1) G15YF TU01676 Rev.1...
  • Page 38 PARTS G 15YF ITEM CODE NO. DESCRIPTION REMARKS USED 320-523 TAPPING SCREW D5 X 25 (BLACK) 331-931 STOP PIECE 303-255 SEAL LOCK SCREW (W/SP. WASHER) M4 X 10 301-944 PUSHING BUTTON 321-737 GEAR COVER ASS'Y INCLUD. 4, 21 309-191 SPECIAL NUT M6 308-543 SEAL RING (A) 980-866...
  • Page 39 NAME PLATE 331-933 TAPPING SCREW (W/FLANGE) D4 X 50 (BLACK) 311-741 TERMINAL 953-327 CORD ARMOR D8.8 HITACHI LABEL 500-234Z CORD (CORD ARMOR D8.8) 500-247Z CORD (CORD ARMOR D8.8) FOR FIN, NOR, SWE, DEN 08 - 09 - 3 - *ALTERNATIVE PARTS...
  • Page 40 STANDARD ACCESSORIES G 15YF ITEM CODE NO. DESCRIPTION REMARKS USED 944-458 HEX. BAR WRENCH 4MM 325-491 WRENCH 325-496 SIDE HANDLE (VIBRATION-ABSORBING) OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-338 SUPER WASHER - 4 - Printed in Japan 08 - 09 *ALTERNATIVE PARTS (090831N)

This manual is also suitable for:

G 15vaG 15yfG 13vaG 13yf

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