Hitachi G10ST Manual de usuario

LIST No.

G 10ST: F209

Feb. 2011

PRODUCT NAME

Hitachi 100 mm Disc Grinder

Model G 10ST

International Sales Division

PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ----------------------------------------------1

1. Disassembly -------------------------------------------------------------------------------------------1

2. Reassembly -------------------------------------------------------------------------------------------2

3. Lubrication Points and Types of Lubricant -----------------------------------------------------5

4. Tightening Torque ------------------------------------------------------------------------------------5

5. Wiring Diagrams --------------------------------------------------------------------------------------5

6. Insulation Tests ---------------------------------------------------------------------------------------6

7. No-Load Current Value -----------------------------------------------------------------------------6

STANDARD REPAIR TIME (UNIT) SCHEDULES -------------------------------------------------------------------- 7

CONTENTS Page

-1-

1. PRECAUTIONS ON DISASSEMBLY AND REASSEMBLY

[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and

exploded assembly diagram for the Model G 10ST.

1-1. Disassembly

(1) Disassembly of the Armature

1) Remove the Brush Cap [37] and take out the Carbon Brush [38].

2) Loosen the four Tapping Screws D5 X 25 (Black) [1] that secure the Gear Cover Ass’y

[2] to remove the Armature [24] from the Housing Ass’y [32] together with the Bearing

Holder [23].

3) Loosen the Special Nut M7 [21] that secures the pinion to remove the pinion.

4) Insert the hooks of the J-204 bearing puller between Ball Bearing 628VVC2PS2-L [22]

and the Bearing Holder [23] from both sides, and then secure the hooks with wing bolts.

5) Place the J-204 bearing puller on a supporting jig, and then use a hand press to push

down on the tip of the armature shaft for removing Ball Bearing 628VVC2PS2-L [22].

Then remove the Bearing Holder [23].

(2) Disassembly of the Dust Seal

1) Insert the hooks of the J-204 bearing puller between the commutator and Dust Seal [29]

from both sides, and then secure the hooks with wing bolts.

2) Place the J-204 bearing puller on a supporting jig, and then use a hand press to push

down on the armature shaft for removing the Dust Seal [29] together with Ball Bearing

626VVC2PS2L [30]. Replace the Dust Seal [29] damaged by removing Ball Bearing

626VVC2PS2L [30] with a new one.

(3) Disassembly of Stator

1) Remove the Armature [24] and loosen the Tapping Screw (W/Flange) D4 X 25 (Black)

[48] to remove Tail Cover (B) [47].

2) Loosen the two Machine Screws (W/Washer) M3.5 X 6 [49] that secure the internal wires

of the Cord [51] and Stator [27] to the Switch (1P Solder Type) [50], and then loosen the

two screws of the Pillar Terminal [42]. Remove the two internal wires from the Cord [51]

and Pillar Terminal [42].

3) Remove the Tapping Screw (W/Flange) D4 X 45 (Black) [35] and Tapping Screw

(W/Flange) D4 X 20 (Black) [36]. Remove Tail Cover (A) [34], and then remove the

Earth Terminal [40] from the Housing Ass’y [32].

4) Disconnect the two internal wires of the Stator [27] coming from the Brush Holder [39]

from the Stator [27].

5) Remove the Fan Guide [25] from the Housing Ass’y [32].

6) Loosen the Tapping Screw D4 x 70 [26] that secures the Stator [27]. Remove the Stator

[27] from the Housing Ass’y [32].

-2-

(4) Disassembly of the gear

1) Loosen the four Seal Lock Screws (W/Sp. Washer) M4 x 12 [10] that secure the Packing

Gland [9] to the Gear Cover Ass’y [2], and then remove the Packing Gland [9] from the

Gear Cover Ass’y [2].

2) Remove the Retaining Ring For D11 Shaft [3] that secures the gear to the Spindle [12].

3) Remove the Wave Washer [4] and the gear from the Spindle [12].

1-2. Reassembly

Conduct reassembly by reversing the disassembly procedure, and note the precautions given

below.

(1) Ensure that the terminals of the stator are not bent or otherwise damaged.

(2) Generously lubricate the teeth of the gear and pinion with grease. Rub grease onto the

teeth with your fingers so that the grease reaches the bottom of each tooth. Note that

insufficient lubrication may cause the gear and pinion to wear faster than normal.

(3) Be sure to soak the inner diameter of the Felt Packing [8] with machine oil. Otherwise, its

dust-sealing function will fail to work properly, resulting in premature damage to Ball

Bearing 6201VVCMPS2L [7].

(4) When replacing the Armature [24] and Ball Bearing 626VVC2PS2L [30] on the commutator

side, press inward on the Dust Seal [29] while carefully noting its direction until the end face

of the Dust Seal [29] contacts the end surface of the Armature [24]. Also make sure that

Dust Seal [29] cannot be freely turned by hand. Keep the end face of the armature shaft

about 0.2 mm (reference) inside the end face of Ball Bearing 626VVC2PS2L [30] (see Fig. 1).

The Dust Seal [29] is an important element for improved dust protection of Ball Bearing

626VVC2PS2L [30]. Be sure to replace it with a new one each time.

Fig. 1

(5) When connecting the Earth Terminal [40] to the internal wire (the middle wire among

three) of the Noise Suppressor [45], strip off about 6 mm of the insulation sheath on the

internal wire, and then use a commercially available clamping tool to press-connect the

wire with the Earth Terminal [40].

Fig. 2

Solderless connection

About 0.2 mm (reference)

Armature shaft

Ball Bearing 626VVC2PS2L [30]

Dust Seal [29]

-3-

(6) Mount the Cord [51] according to the following procedure when replacing the standard cord

(with integrally molded cord armor).

1) Remove the standard cord (with integrally molded cord armor) according to the

procedure described in 8-1 (3).

2) Strip off about 10 mm of coating from

the tip of the internal wire of the Cord

[51], and then crimp the Terminal [44]

to the brown or black internal wire as

shown in Fig. 5.

3) Insert the Cord [51] into Tail Cover (A)

[34] as shown in Fig. 6.

4) Mount each internal wire by reversing

the removal procedure. Then mount

Tail Cover (B) [47] to Tail Cover (A)

[34] and secure both with the Tapping

Screw (W/Flange) D4 X 25 (Black)

[48].

(a) For China and Korea (b) For Taiwan

Fig. 6

Cord [51]

Terminal [44]

Fig. 5

-4-

Guide Plate

OFF side

ON side

Internal wire from Cord [51]

Machine Screw (W/Washer) M3.5 x 6 [49]

Switch (1P Solder Type) [50]

Internal wire from Stator [27]

Internal wire from Noise Suppressor [45]

Machine Screw (W/Washer) M3.5 X 6 [49]

: Tail Cover (A) [34]

(7) Correctly connect the internal wires of the Stator [27] as shown in Fig. 5and Fig. 6.

(8) Correctly connect each internal wire as shown in Fig. 4, and be careful not to route the

wires between any parts.

Fig. 5

Fig. 6

(9) When replacing the Gear Cover Ass’y [2], lubricate the needle bearing part with mixed oil.

Mixed oil: A mixture of Hitachi Power Tool Grease No. 2 (Unilube No. 00, Code No. 939302

recommended) and turbine oil

• Mixture ratio------------------------- 1:1 (weight ratio)

• Quantity ------------------------------ 0.5 cc

Colorless

Bottom of the housing

Internal wire coming from the

Noise Suppressor [45]

Brush Holder [39]

Insert the terminal securely then push

and fold the terminal toward the outside

of the housing as much as possible.

Colorless

-5-

1-3. Lubrication Points and Types of Lubricant

• Pinion chamber of Gear Cover Ass’y [2] ------ Cosmo Molybden Grease No. 2 (7 g)

Generously rub grease onto the gear and pinion.

• Needle bearing--------------------------------------- Mixed oil (0.5 cc)

Mixed oil: Mixture of Hitachi Power Tool Grease No. 2

(Unilube No. 00, Code No. 939302) and turbine oil

Mixture ratio-------------- 1:1 (weight ratio)

1-4. Tightening Torque

• Tapping Screws D4 [26] [35] [36] [48] ----- 2.0 ± 0.5 N•m (20 ± 5 kgf•cm, 1.5 ± 0.4 fb-lbs.)

• Seal Lock Screw M4 [6] [10] ------------------- 1.8 ± 0.4 N•m (18 ± 4 kgf•cm, 1.3 ± 0.3 fb-lbs.)

• Tapping Screw D5 X 25 (Black) [1] ----------- 2.9 ± 0.5 N•m (30 ± 5 kgf•cm, 2.2 ± 0.4 fb-lbs.)

•

Machine Screw (W/Sp. Washer) M5 X 16(Black)

[14]

- 1.6 ± 0.4 N•m (16 ± 4 kgf•cm, 1.2 ± 0.3 fb-lbs.)

• Special Nut M7 [21]------------------------------- 6.4 ± 1.0 N•m (65 ± 10 kgf•cm, 4.7 ± 0.7 fb-lbs.)

• Brush Cap [37]------------------------------------- 0.6 ± 0.2 N•m (6 ± 2 kgf•cm, 0.4 ± 0.1 fb-lbs.)

1-5. Wiring Diagram

(1) For China and Korea

(2) For Taiwan

(3) For other countries

Noise Suppressor [45]

Noise Suppressor [46]

Black

White

Cord [51]

Switch [50]

Stator [27]

Colorless

Choke coil

Pillar Terminal [42]

Stator [27]

Switch [50]

Black

White

Cord [51]

Noise Suppressor [45]

Noise Suppressor [46]

Cord [51]

Black

White

Switch [50]

Colorless

Stator [27]

-6-

1-6. Insulation Tests

Upon completing disassembly and repair, carefully measure the insulation resistance and

conduct a dielectric strength test.

Insulation resistance: 7 MΩor more with 500 VDC megohm tester

Dielectric strength test: 4,000 VAC/1 minute with no abnormalities ----- 220 to 240 V products

2,500 VAC/1 minute with no abnormalities----- 110 to 127 V products

1-7. No-load Current Value

After no-load running for 30 minutes, the no-load current value should be as follows:

Voltage (V) 110 220 230 240

Current (A) max. 2.7 1.4 1.4 1.3

-7-

2. STANDARD REPAIR TIME (UNIT) SCHEDULES

MODEL Variable

Fixed 10 20 30 40 50 60 min.

G 10ST

General Assembly

Armature

Ball Bearing

628VVC2PS2-L

Bearing

Holder

Dust Seal

Ball Bearing

626VVC2PS2L

Rubber

Bushing

Gear Cover

Ass'y

Pushing

Button

Lock Pin

Housing

Ass'y

Stator

Packing

Gland

Ball Bearing

6201VVCMPS2L

Spindle

Gear and

Pinion Set

Work Flow

Switch

Ta i l C o v e r ( A )

Ta i l C o v e r ( B )

Cord

Wheel Guard

Ass'y

Model G 10ST

DISC GRINDER

LIST NO. F209

2011·2·16

(E1)

501

26 27

502

PART

G 10ST

DESCRIPTION REMARKS

1 320-523 TAPPING SCREW D5 X 25 (BLACK) 4

2 316-484 GEAR COVER ASS'Y 1 INCLUD. 5, 20

3 316-487 RETAINING RING FOR D11 SHAFT 1

4 316-486 WAVE WASHER 1

5 301-943 LOCK PIN 1

6 323-556 SLOTTED HD. SCREW (SEAL LOCK) M4 X 8 2

7 620-1VV BALL BEARING 6201VVCMPS2L 1

8 301-946 FELT PACKING 1

9 316-489 PACKING GLAND 1

10 307-127 SEAL LOCK SCREW (W/SP. WASHER) M4 X 12 4

11 302-047 WOODRUFF KEY 1

12 316-485 SPINDLE 1

13 301-945 FRINGER 1

14 308-386 MACHINE SCREW (W/SP. WASHER) M5 X 16(BLACK 2

15 301-949 SET PLATE 1

16 331-076 WHEEL GUARD ASS'Y 1 INCLUD. 14, 15

17 320-497 WHEEL WASHER 1

18 316-820 D. C. WHEELS 100MM X 4T A36Q (25 PCS.) 1

19 321-795 WHEEL NUT (C) 1

20 301-944 PUSHING BUTTON 1

21 301-941 SPECIAL NUT M7 1

22 628-VVC BALL BEARING 628VVC2PS2-L 1

23 316-480 BEARING HOLDER 1

*24 360-909C ARMATURE 110V 1

*24 360-909E ARMATURE 220V 1

*24 360-909F ARMATURE 230V-240V 1

25 319-898 FAN GUIDE 1

26 320-677 TAPPING SCREW D4 X 70 2

*27 340-796C STATOR 110V 1

*27 340-796E STATOR 220V 1

*27 340-796D STATOR 220V 1 FOR CHN, KOR

*27 340-796F STATOR 230V-240V 1

28 331-840 GEAR AND PINION SET 1

29 313-775 DUST SEAL 1

30 626-VVM BALL BEARING 626VVC2PS2L 1

31 309-929 RUBBER BUSHING 1

32 333-573 HOUSING ASS'Y 1 INCLUD. 31

33 NAME PLATE 1

34 333-574 TAIL COVER (A) 1

35 301-815 TAPPING SCREW (W/FLANGE) D4 X 45 (BLACK) 1

36 302-086 TAPPING SCREW (W/FLANGE) D4 X 20 (BLACK) 1

37 936-551 BRUSH CAP 2

38 999-021 CARBON BRUSH (1 PAIR) 2

39 313-777 BRUSH HOLDER 2

*40 314-854 EARTH TERMINAL 1 FOR NOISE SUPPRESSOR

*41 980-063 TERMINAL 1 FOR NOISE SUPPRESSOR

*42 938-307 PILLAR TERMINAL 1 FOR MAL, CHN, KOR

*43 959-140 CONNECTOR 50091 (10 PCS.) 1 EXCEPT FOR MAL, CHN, KOR, TPE

*43 959-141 CONNECTOR 50092 (10 PCS.) 1 FOR TPE

44 980-063 TERMINAL 1 FOR CORD

- 2 - 2 - 11

*ALTERNATIVE PARTS

ITEM

NO. NO.

USED

CODE NO.

ITEM

NO. NO.

USED

CODE NO.

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