Hitachi G 18SH2 Technical Data And Service Manual
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Hitachi G 18SH2 Technical Data And Service Manual

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MODEL
G 18SH2, G 18U2
G 23SF2, G 23U2
POWER TOOLS
DISC GRINDER
TECHNICAL DATA
G
AND
G 18SH2, G 18U2
SERVICE MANUAL
G 23SF2, G 23U2
LIST Nos. E244, E245, E246, E247
Sep. 2001
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi G 18SH2

  • Page 1 MODEL G 18SH2, G 18U2 G 23SF2, G 23U2 POWER TOOLS DISC GRINDER TECHNICAL DATA G 18SH2, G 18U2 SERVICE MANUAL G 23SF2, G 23U2 LIST Nos. E244, E245, E246, E247 Sep. 2001 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: Competitors Symbols Utilized Company Name Model Name 9067 9069 MAKITA 9067SF 9069SF...

  • Page 3: Table Of Contents

    8-6. Insulation Tests ..........................14 8-7. No-load Current Value ........................14 9. STANDARD REPAIR TIME (UNIT) SCHEDULES ............... 15 Assembly Diagram for G 18SH2 ......................16 Assembly Diagram for G 18U2 ......................20 Assembly Diagram for G 23SF2 ......................24...

  • Page 4: Product Name

    Models G 18SH, G 18U, G 23SF and G 23U. In addition, the Models G 18U2, G 23U2 are with a soft start. The key features of the Models G 18SH2, G 18U2, G 23SF2 and G 23U2 in comparison with the...

  • Page 5: Selling Points

    4-1. Class-top overload durability The Models G 18SH2, G 18U2, G 23SF2 and G 23U2 provide excellent overload durability thanks to the improved motor winding and carbon brush material in common with the current models (the service life of the carbon brushes is also prolonged).

  • Page 6: Prolonged Service Life Of The Carbon Brushes Thanks To The New Construction

    The service life of the carbon brushes is 1.4 times longer than the current models thanks to the adoption of the new carbon brush retainer construction. The service life of the carbon brushes is equivalent to that of the competitors. G 18SH2/G 23SF2 G 18U2/G 23U2 G 18SH/G 23SF G 18U/G 23U Fig.

  • Page 7: Dust-Proof Ball Bearing Thanks To The Labyrinth Construciton

    4-5. Durable ball bearing retainer thanks to the iron bushing The Models G 18SH2, G 18U2, G 23SF2 and G 23U2 are equipped with the iron bushing in the ball bearing retainer at the commutator side of the housing to improve the durability of the ball bearing retainer.

  • Page 8: Specifications

    5. SPECIFICATIONS Model G 18SH2/G 18U2 G 23SF2/G 23U2 Item O.D. 180 mm (7") O.D. 230 mm (9") Dimensions x Thickness 6 mm (1/4") x Thickness 6 mm (1/4") Depressed- x I.D. 22.2 mm (7/8") x I.D. 22.2 mm (7/8") center Max.

  • Page 9: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons HITACHI Maker G 18SH2 G 18SH Model name G 18U2 G 18U Capacity: (7") (7") Depressed-center wheel dia. (mm) (7") (7") 2000 2000 Power input *1 2000 2000 1330 1220 Power output *1...

  • Page 10: Practical Test Data

    6-2. Practical Test Data Comparison of temperature rise of stator coil section: The graph below shows the relationship between load and temperature rise of the stator coil. The temperature rise of the Models G 23SF2 and G 23SF is the lowest among the competitive models. This means that the resistance to overload usage of the Models G 23SF2 and G 23SF is superior to other maker's models.

  • Page 11: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Models G 18SH2, G18U2, G23SF2 and G 23U2 Disc Grinders by all of our customers, it is very important that at the time of sale, the salesperson...

  • Page 12: Precautions In Disassembly And Reassembly

    The [Bold] numbers in the descriptions below correspond to the numbers in the Parts List and the exploded assembly diagram for G 23SF2 and G 18SH2, and the <Bold> numbers to those in the Parts List and the exploded assembly diagram for G 23U2 and G 18U2.
  • Page 13 (2) Removal of the Dust Seal [36] <36> 1. Insert the hooks of the J-204 bearing puller between the commutator and the Dust Seal [36] <36> from both sides, and fix the hooks with the wing bolts. 2. Place the J-204 bearing puller on a supporting jig and push down on the armature shaft with a hand press to remove the Dust Seal [36] <36>...

  • Page 14: Reassembly

    8-2.Reassembly Put the parts together in the reverse order of disassembly, with the precautions given below. (1) Generously lubricate the teeth of Gear [19] <19> and Pinion [7] <7> with grease. Rub grease onto the teeth with your fingers so that the grease reaches each tooth bottom. Note that under-lubricated Gear [19] <19> and Pinion [7] <7>...
  • Page 15 Pass the internal wire of the cord through this area. Insert the terminal securely. (a) G 18SH2/G 23SF2 Fit the internal wire in Pass the internal wire of the groove securely. the cord through this area. Resistor ass'y...

  • Page 16: Lubrication Points And Types Of Lubricant

    The internal wire with tube of stator shall pass this groove. The internal wire of stator shall pass this area. (2 pcs.) Fig. 14 (6) Mount the cord clip as shown in Fig. 15 being careful of the direction. Cord dia.: Max. 8.5 mm dia. Cord dia.: Over 8.5 mm dia.

  • Page 17: Wiring Diagram

    8-5. Wiring Diagram (1) G 18SH2/G 23SF2 Wiring dia. Switch Field coil Condensor Power ass'y (0.22 µF) source Field coil (2) G 18U2/G 23U2 Wiring dia. Switch Field coil Condensor ass'y (0.22 µF) Resistor Power ass'y source Damper Field coil 8-6.

  • Page 18: Standard Repair Time (Unit) Schedules

    9. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow G 18SH2 G 18U2 G 23SF2 Wheel Guard Ass'y G 23U2 Housing Ass'y General Assembly Stator Gear Cover Pinion Ass'y Seal Washer Felt Packing Ball Bearing (6301DD)

  • Page 19: Assembly Diagram For G 18Sh2

    LIST NO. E244 ELECTRIC TOOL PARTS LIST DISC GRINDER 2001 • • Model G 18SH2 (E1)
  • Page 20 PARTS G 18SH2 ITEM CODE NO. DESCRIPTION REMARKS USED 315-636 SEAL LOCK SCREW (W/SP.WASHER)M5X14(BLACK) 301-654 TAPPING SCREW (W/FLANGE) D5X35 306-888 PUSHING BUTTON 320-219 SPRING 320-217 GEAR COVER ASS’Y INCLUD.3,4,33,34 320-226 SPECIAL NUT M10 320-243 PINION 320-221 SEAL WASHER 320-222 FELT PACKING...
  • Page 21 PARTS G 18SH2 ITEM CODE NO. DESCRIPTION REMARKS USED 960-266 CORD CLIP 984-750 TAPPING SCREW (W/FLANGE) D4X16 320-230 HANDLE (A) 981-373 TUBE (D) 940-778 CORD ARMOR D10.7 500-214Z CORD 500-247Z CORD FOR EUROPE,NOR,SWE,DEN,FIN 9 -- 01 * ALTERNATIVE PARTS --- 3 -- -...
  • Page 22 G 18SH2 STANDARD ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-913Z WRENCH OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-337 SUPER WASHER Printed in Japan 9 -- 01 --- 4 --- * ALTERNATIVE PARTS (010925N)

  • Page 23: Assembly Diagram For G 18U2

    LIST NO. E245 ELECTRIC TOOL PARTS LIST DISC GRINDER 2001 • • Model G 18U2 (E1)
  • Page 24 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 999-061 CARBON BRUSH 7X17X22.5 (1 PAIR) 320-231 HANDLE (B) 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) HITACHI LABEL 320-233 BRUSH HOLDER 320-245 SPRING 320-236 RESISTOR 320-235 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK...
  • Page 25 PARTS G 18U2 ITEM CODE NO. DESCRIPTION REMARKS USED 960-266 CORD CLIP 984-750 TAPPING SCREW (W/FLANGE) D4X16 320-230 HANDLE (A) 981-373 TUBE (D) 940-778 CORD ARMOR D10.7 500-247Z CORD 1 (CORD ARMOR D10.7) 9 -- 01 * ALTERNATIVE PARTS --- 3 -- -...
  • Page 26 G 18U2 STANDARD ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-913Z WRENCH OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-337 SUPER WASHER 316-824 D. C. WHEELS 180MM A24R (25 PCS.) Printed in Japan 9 -- 01 --- 4 --- * ALTERNATIVE PARTS (010925N)

  • Page 27: Assembly Diagram For G 23Sf2

    LIST NO. E246 ELECTRIC TOOL PARTS LIST DISC GRINDER 2001 • • Model G 23SF2 (E1)
  • Page 28 PARTS G 23SF2 ITEM CODE NO. DESCRIPTION REMARKS USED 315-636 SEAL LOCK SCREW (W/SP.WASHER)M5X14(BLACK) 301-654 TAPPING SCREW (W/FLANGE) D5X35 306-888 PUSHING BUTTON 320-219 SPRING 320-217 GEAR COVER ASS’Y INCLUD.3,4,33,34 320-226 SPECIAL NUT M10 320-225 PINION 320-221 SEAL WASHER 320-222 FELT PACKING 630-1DD BALL BEARING 6301DDCMPS2L 994-208...
  • Page 29 PARTS G 23SF2 ITEM CODE NO. DESCRIPTION REMARKS USED 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) HITACHI LABEL 320-233 BRUSH HOLDER 320-245 SPRING 320-238 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 320-239 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK W/LOCK FOR SYR,SAF,OMA,FRG,HOL,BEL, ESP,AUT...
  • Page 30 G 23SF2 STANDARD ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-913Z WRENCH 937-917Z WHEEL NUT (B) FOR AUS OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-337 SUPER WASHER Printed in Japan 9 -- 01 --- 4 --- * ALTERNATIVE PARTS (010925N)

  • Page 31: Assembly Diagram For G 23U2

    LIST NO. E247 ELECTRIC TOOL PARTS LIST DISC GRINDER 2001 • • Model G 23U2 (E1)
  • Page 32 CARBON BRUSH 7X17X22.5 (1 PAIR) 999-089 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 320-231 HANDLE (B) 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) HITACHI LABEL 320-233 BRUSH HOLDER 9 -- 01 --- 2 --- * ALTERNATIVE PARTS...
  • Page 33 PARTS G 23U2 ITEM CODE NO. DESCRIPTION REMARKS USED 320-245 SPRING 320-236 RESISTOR 320-235 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK W/LOCK 320-371 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK W/O LOCK FOR AUS 960-266 CORD CLIP 984-750 TAPPING SCREW (W/FLANGE) D4X16 320-230 HANDLE (A) 981-373...
  • Page 34 G 23U2 STANDARD ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 937-913Z WRENCH * 502 937-917Z WHEEL NUT (B) FOR AUS OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 310-337 SUPER WASHER Printed in Japan 9 -- 01 --- 4 --- * ALTERNATIVE PARTS (010925N)

This manual is also suitable for:

G 18u2G 23sf2G 23u2

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