Hitachi G 18SS Service Manual
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Hitachi G 18SS Service Manual

Hitachi G 18SS Service Manual

180/230 mm
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See also: Operation Manual & Safety Instructions
PRODUCT NAME
Hitachi 180 mm Disc Grinder
G 18SS
Model
Hitachi 230 mm Disc Grinder
G 23SS
Model
MARKETING OBJECTIVE
The Models G 18SS and G 23SS have been developed to meet the market demand for low-end class products
like the Models G 10SS and G 12SS in order to expand the sales of Hitachi Disc Grinders. The main features of
the Models G 18SS and G 23SS are as follows.
(1) Excellent overload durability: 26% higher than B
(2) Protected armature coil
(3) Dust-proof ball bearing thanks to the labyrinth construction
APPLICATIONS
Deburring diecast products and finishing iron, bronze, aluminum and diecast products
Finishing welds and torch-cut surfaces
Cutting soft steel materials
Grooving and cutting concrete and other stone materials
SELLING POINTS
[ NEW FEATURES ]
Excellent overload durability
Protected armature coil
Dust-proof ball bearing thanks to the labyrinth
construction
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
LIST Nos.
G 18SS: E293
G 23SS: E294
Jun. 2008
International Sales Division
G

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Summary of Contents for Hitachi G 18SS

  • Page 1 The Models G 18SS and G 23SS have been developed to meet the market demand for low-end class products like the Models G 10SS and G 12SS in order to expand the sales of Hitachi Disc Grinders. The main features of the Models G 18SS and G 23SS are as follows.
  • Page 2 REMARK: 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...

  • Page 3: Table Of Contents

    SPECIFICATIONS -------------------------------------------------------------------------------------------------------------- 3 COMPARISONS WITH SIMILAR PRODUCTS-------------------------------------------------------------------------- 4 PRECAUTIONS IN SALES PROMOTION-------------------------------------------------------------------------------- 5 REPAIR GUIDE------------------------------------------------------------------------------------------------------------------ 6 1. Precautions in disassembly and reassembly -------------------------------------------------------------- 6 STANDARD REPAIR TIME (UNIT) SCHEDULES-------------------------------------------------------------------- 12 Assembly diagram for G 18SS Assembly diagram for G 23SS...

  • Page 4: Selling Point Descriptions

    The graph below shows the comparison of overload durability when the stator coil temperature rise is 200° K using the Model G 23SS as the reference. As is evident from this, the Models G 18SS and G 23SS are superior to B in overload durability.
  • Page 5 Dust-proof ball bearing thanks to the labyrinth construction The ball bearing retainers at both sides of the armature have a labyrinth construction to make the ball bearings dust-proof. Labyrinth Commutator Ball bearing (6301VVCM) Ball bearing (6000VVCM) Labyrinth Armature shaft Housing Dust seal Bearing cover...

  • Page 6: Specifications

    SPECIFICATIONS 1. Specifications Model G 18SS G 23SS O.D.180 mm (7”) O.D.230 mm (9”) Dimensions x Thickness 6 mm (1/4”) x Thickness 6 mm (1/4”) x I.D. 22.2 mm (7/8”) x I.D. 22.2 mm (7/8”) Depressed- Max. practical 80 m/s (15,800 ft/min)

  • Page 7: Comparisons With Similar Products

    COMPARISONS WITH SIMILAR PRODUCTS (Superior specifications: 1. Specification comparisons Maker HITACHI Model name G 18SS Capacity Depressed-center wheel dia. (mm) (7”) (7”) Power input * 1,900 2,000 Power output * 1,200 1,160 Max. power output * 3,150 2,900 No-load speed...

  • Page 8: Precautions In Sales Promotion

    1. Safety instructions In the interest of promoting the safest and most efficient use of the Models G 18SS and G 23SS Disc Grinders by all of our customers, it is very important that at the time of sale, the salesperson carefully...

  • Page 9: Repair Guide

    1. 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 the Models G 18SS and G 23SS. Disassembly 1. Removal of the armature (a) Loosen the Hex.
  • Page 10 2. Removal of the dust seal (a) Insert the hooks of the J-204 bearing puller between the commutator and the Dust Seal [14] from both sides, and fix the hooks with the wing bolts. (b) 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 [14] together with the Ball Bearing 6000VVCMPS2L [15].
  • Page 11 Reassembly Put the parts together in the reverse order of disassembly, with the precautions given below. (1) Apply machine oil to Felt Packing (B) [23] then mount it to the Packing Gland [26] to increase the dust resistance. (2) Generously lubricate the teeth of the Gear and Pinion Set [33] with grease. Rub grease onto the teeth with your fingers so that the grease reaches each tooth bottom.
  • Page 12 (5) Arrange the internal wires as shown in Figs. 4 and 5 being careful not to connect in wrong direction or position and not to get the internal wires caught in parts. Fig. 4 Pass the internal wire of the Fit the internal wire in the groove securely.

  • Page 13: Tightening Torque

    (6) Mount the cord clip as shown in Fig. 6 being careful of the direction. Fig. 6 Cord dia.: Over 8.5 mm Cord dia.: Max. 8.5 mm Cord clip mounting diagram Lubrication points and type of lubricant Pinion chamber of the Gear Cover Ass'y [5] ---------COSMO MOLYBDEN NO. 2 60 g Generously rub grease onto the gear, pinion and inner circumference of the metal.

  • Page 14: Wiring Diagram

    Wiring diagram • Wiring diagram Insulation tests On completion of disassembly and repair, measure the insulation resistance, and conduct the dielectric strength test. Insulation resistance: After the switch is turned on, more than 10 MΩ by 500 V DC megohm meter between live parts and accessible metal parts.

  • Page 15: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow G 18SS G 23SS Wheel Guard Ass’y Housing Ass’y Stator General Assembly Gear Cover Pinion Ass’y Ball Bearing (6301VV) Rubber Ring Bearing Cover Armature Dust Seal Ball Bearing...
  • Page 16 LIST NO. E293 DISC GRINDER Model G 18SS (E1)
  • Page 17 PARTS G 18SS ITEM CODE NO. DESCRIPTION REMARKS USED 315-636 SEAL LOCK SCREW (W/SP. WASHER) M5X14 (BLACK) 306-888 PUSHING BUTTON 320-219 SPRING 937-033 FELT WASHER 330-080 GEAR COVER ASS'Y INCLUD. 2-4, 32 320-226 SPECIAL NUT M10 630-1VV BALL BEARING 6301VVCMPS2L...
  • Page 18 PARTS G 18SS ITEM CODE NO. DESCRIPTION REMARKS USED 938-477 HEX. SOCKET SET SCREW M5X8 330-033 HANDLE (A) 930-804 TERMINAL M4.0 (10 PCS.) FOR USA, CAN 981-373 TUBE (D) FOR CORD 960-266 CORD CLIP 984-750 TAPPING SCREW (W/FLANGE) D4X16 305-812...

  • Page 19: Standard Accessories

    STANDARD ACCESSORIES G 18SS ITEM CODE NO. DESCRIPTION REMARKS USED 325-491 WRENCH 872-422 HEX. BAR WRENCH 6MM OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 316-824 D. C. WHEELS 180MM A24R (25 PCS.) 310-337 SUPER WASHER 323-993 PIPE HANDLE SET INCLUD.
  • Page 20 LIST NO. E294 DISC GRINDER Model G 23SS (E1)
  • Page 21 937-923P WHEEL NUT 5/8"-11UNC FOR USA, CAN, MEX 306-890 LOCK PIN 330-032 GEAR AND PINION SET 945-161 BRUSH CAP 999-038 CARBON BRUSH (1 PAIR) 938-241 BRUSH HOLDER HITACHI LABEL 330-028 HOUSING ASS'Y INCLUD. 36, 40 - 2 - 6 - 08 *ALTERNATIVE PARTS...
  • Page 22 PARTS G 23SS ITEM CODE NO. DESCRIPTION REMARKS USED NAME PLATE 938-477 HEX. SOCKET SET SCREW M5X8 330-033 HANDLE (A) 930-804 TERMINAL M4.0 (10 PCS.) FOR USA, CAN 981-373 TUBE (D) 961-820 TUBE (D) FOR GBR (110V) 960-266 CORD CLIP 984-750 TAPPING SCREW (W/FLANGE) D4X16 305-812...
  • Page 23 STANDARD ACCESSORIES G 23SS ITEM CODE NO. DESCRIPTION REMARKS USED 325-491 WRENCH 872-422 HEX. BAR WRENCH 6MM OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 316-825 D. C. WHEELS 230MM A24R (25 PCS.) 310-337 SUPER WASHER 323-993 PIPE HANDLE SET INCLUD.

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