Hitachi G 18SR Manual

TECHNICAL DATA
AND
SERVICE MANUAL
DISC GRINDER
G 18SR, G 18SRU
G 23SR, G 23SRU
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST Nos. G 18SR: E275 G 18SRU: E276
G 23SR: E273 G 23SRU: E274
Apr. 2006
G
MODELS
G 18SR, G 18SRU
G 23SR, G 23SRU
Hitachi 
Power Tools

ELECTRIC TOOL PARTS LIST
LIST NO. E275
DISC GRINDER
Model G 18SR
2006
•
4
•
14
(E1)
Hitachi Power Tools
501
1
2
5
3
4
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
45
46
47 48
49
51
52
53
54
55
44
50
17

*ALTERNATIVE PARTS--- 2 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 18SR
1315-636 SEAL LOCK SCREW (W/SP. WASHER) M5X14 (BLACK) 2
2323-209 TAPPING SCREW (W/FLANGE) D5X35 (BLACK) 4
3306-888 PUSHING BUTTON 1
4320-219 SPRING 1
5320-217 GEAR COVER ASS’Y 1 INCLUD. 3, 4, 34, 35
6320-226 SPECIAL NUT M10 1
7320-225 PINION 1
8320-221 SEAL WASHER 1
9320-222 FELT PACKING 1
10 630-1VV BALL BEARING 6301VVCMPS2L 1
11 994-208 RUBBER RING (B) 1
12 320-220 BEARING COVER (A) 1
13 360-762E ARMATURE 220V-240V 1
14 320-215 FAN GUIDE 1
15 961-501 HEX. HD. TAPPING SCREW D5X60 2
16 340-664E STATOR ASS’Y 220V-230V 1 INCLUD. 17
17 958-032 BRUSH TERMINAL 2
18 937-981 SIDE HANDLE FOR M14 1
19 939-542
RETAINING RING FOR D12 SHAFT (10 PCS.) 1
20 320-224 GEAR 1
21 949-236 MACHINE SCREW M5X10 (10 PCS.) 2
22 320-229 BEARING COVER (B) 1
23 630-2VV BALL BEARING 6302VVCMPS2L 1
24 990-852 FELT PACKING (B) 1
25 320-234 SPINDLE 1
26 320-228 SEAL PLATE 1
27 320-227 PACKING GLAND 1
28 994-192
HEX. SOCKET HD. BOLT (W/FLANGE) M5X16 4
29 306-887 BOLT M8X22 1
30 306-124 WHEEL GUARD ASS’Y 1
31 937-907Z WHEEL WASHER (A) 1
32 316-824 D. C. WHEELS 180MM A24R (25 PCS.) 1
33 937-909Z WHEEL NUT M14X2 1
34 320-218 O-RING 1
35 306-890 LOCK PIN 1
36 320-223 GEAR AND PINION ASS’Y 1 INCLUD. 7, 20
37 320-216 DUST SEAL 1
38 600-0VV BALL BEARING 6000VVCMPS2L 1
39 321-536 BEARING BUSHING 1
40 325-640 HOUSING 1 INCLUD. 39, 47, 49
41 HITACHI LABEL 1
42 325-641 HANDLE (B) 1
43 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 4
44 NAME PLATE 1
45 940-540 BRUSH CAP 2
46 999-044 CARBON BRUSH (1 PAIR) 1
46 999-074
CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 1
47 980-487 BRUSH HOLDER 2
48 325-642 HANDLE (A) 1
49 938-477 HEX. SOCKET SET SCREW M5X8 2
*50320-239
SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1W/LOCK

*ALTERNATIVE PARTS --- 3 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 18SR
*50 320-238 SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1OFF/LOCK
51 960-266 CORD CLIP 1
52 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
53 981-373 TUBE (D) 2 FOR CORD
*54 940-778 CORD ARMOR D10.7 1
*54 958-049 CORD ARMOR D8.2 1
*55 500-247Z CORD 1 (CORD ARMOR D10.7) FOR EUROPE
*55 500-234Z CORD 1 (CORD ARMOR D8.2) FOR SYR, IND, INA

*ALTERNATIVE PARTS
--- 4 --- 4 -- 06
OPTIONAL ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
STANDARD ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
G 18SR
Printed in Japan
(060414N)
501 325-491 WRENCH 1
601 323-993 PIPE HANDLE SET 1 INCLUD. 602
602 985-597 BOLT M14 2
603 310-337 SUPER WASHER 1

ELECTRIC TOOL PARTS LIST
LIST NO. E276
DISC GRINDER
Model G 18SRU
2006
•
4
•
14
(E1)
Hitachi Power Tools
59
501
30
34
35
36
37
38
39
40
56
1
2
5
3
4
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
42
43
44
45
46
47
48
49
50
51
53
54
55 57
60
61
62
63
64
52
58
17

*ALTERNATIVE PARTS--- 2 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 18SRU
1315-636 SEAL LOCK SCREW (W/SP. WASHER) M5X14 (BLACK) 2
2323-209
TAPPING SCREW (W/FLANGE) D5X35 (BLACK) 4
3306-888 PUSHING BUTTON 1
4320-219 SPRING 1
5320-217 GEAR COVER ASS’Y 1 INCLUD. 3, 4, 42, 43
6320-226 SPECIAL NUT M10 1
7320-225 PINION 1
8320-221 SEAL WASHER 1
9320-222 FELT PACKING 1
10 630-1VV BALL BEARING 6301VVCMPS2L 1
11 994-208 RUBBER RING (B) 1
12 320-220 BEARING COVER (A) 1
13 360-762E ARMATURE 220V-240V 1
14 320-215 FAN GUIDE 1
15 961-501 HEX. HD. TAPPING SCREW D5X60 2
16 340-664E STATOR ASS’Y 220V-230V 1 INCLUD. 17
17 958-032 BRUSH TERMINAL 2
18 937-981 SIDE HANDLE FOR M14 1
19 939-542
RETAINING RING FOR D12 SHAFT (10 PCS.) 1
20 320-224 GEAR 1
21 949-236 MACHINE SCREW M5X10 (10 PCS.) 2
22 320-229 BEARING COVER (B) 1
23 630-2VV BALL BEARING 6302VVCMPS2L 1
24 990-852 FELT PACKING (B) 1
25 320-234 SPINDLE 1
26 320-228 SEAL PLATE 1
27 320-227 PACKING GLAND 1
28 994-192
HEX. SOCKET HD. BOLT (W/FLANGE) M5X16 4
*29 306-887 BOLT M8X22 1 EXCEPT FOR HOL
*30 306-124 WHEEL GUARD ASS’Y 1 INCLUD. 29
*30 321-543 WHEEL GUARD ASS’Y 1 INCLUD. 34-40 FOR HOL
31 937-907Z WHEEL WASHER (A) 1
32 316-824 D. C. WHEELS 180MM A24R (25 PCS.) 1
33 937-909Z WHEEL NUT M14X2 1
*34311-492 LABEL 1 FOR HOL
*35 321-546 SET PIN 1 FOR HOL
*36 321-545 LEVER 1 FOR HOL
*37 306-887 BOLT M8X22 1 FOR HOL
*38 949-457 SPRING WASHER M8 (10 PCS.) 1 FOR HOL
*39 321-544 SET PIECE 1 FOR HOL
*40 673-489
RETAINING RING (E-TYPE) FOR D5 SHAFT 1FOR HOL
42 320-218 O-RING 1
43 306-890 LOCK PIN 1
44 320-223 GEAR AND PINION ASS’Y 1 INCLUD. 7, 20
45 320-216 DUST SEAL 1
46 600-0VV BALL BEARING 6000VVCMPS2L 1
47 321-536 BEARING BUSHING 1
48 325-640 HOUSING 1 INCLUD. 47, 55, 58
49 HITACHI LABEL 1
50 325-641 HANDLE (B) 1
51 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 4

*ALTERNATIVE PARTS --- 3 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 18SRU
52 NAME PLATE 1
53 940-540 BRUSH CAP 2
54 999-044 CARBON BRUSH (1 PAIR) 1
54 999-074 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 1
55 980-487 BRUSH HOLDER 2
56 325-642 HANDLE (A) 1
57 320-236 RESISTOR 1
58 938-477 HEX. SOCKET SET SCREW M5X8 2
59 320-235
SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1
60 960-266 CORD CLIP 1
61 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
62 981-373 TUBE (D) 2 FOR CORD
63 940-778 CORD ARMOR D10.7 1
64 500-247Z CORD 1 (CORD ARMOR D10.7)

*ALTERNATIVE PARTS
--- 4 --- 4 -- 06
OPTIONAL ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
STANDARD ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
G 18SRU
Printed in Japan
(060414N)
501 325-491 WRENCH 1
601 323-993 PIPE HANDLE SET 1 INCLUD. 602
602 985-597 BOLT M14 2
603 310-337 SUPER WASHER 1

ELECTRIC TOOL PARTS LIST
LIST NO. E273
DISC GRINDER
Model G 23SR
2006
•
4
•
14
(E1)
Hitachi Power Tools
501 502
1
2
5
3
4
6
7
8
9
10
11
12
13
14
15
16
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
45
46
47 48
49
51
52
53
54
55
44
50
17
18
503

*ALTERNATIVE PARTS--- 2 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 23SR
1315-636 SEAL LOCK SCREW (W/SP. WASHER) M5X14 (BLACK) 2
2323-209
TAPPING SCREW (W/FLANGE) D5X35 (BLACK) 4
3306-888 PUSHING BUTTON 1
4320-219 SPRING 1
5320-217 GEAR COVER ASS’Y 1 INCLUD. 3, 4, 34, 35
6320-226 SPECIAL NUT M10 1
7320-225 PINION 1
8320-221 SEAL WASHER 1
9320-222 FELT PACKING 1
10 630-1VV BALL BEARING 6301VVCMPS2L 1
11 994-208 RUBBER RING (B) 1
12 320-220 BEARING COVER (A) 1
*13 360-762C ARMATURE 110V 1
*13 360-762E ARMATURE 220V-240V 1
14 320-215 FAN GUIDE 1
15 961-501 HEX. HD. TAPPING SCREW D5X60 2
*16 340-664C STATOR ASS’Y 110V 1 INCLUD. 17
*16 340-664E STATOR ASS’Y 220V-230V 1 INCLUD. 17
*16 340-664F STATOR ASS’Y 240V 1 INCLUD. 17
17 958-032 BRUSH TERMINAL 2
18 937-981 SIDE HANDLE FOR M14 1
19 939-542
RETAINING RING FOR D12 SHAFT (10 PCS.) 1
20 320-224 GEAR 1
21 949-236 MACHINE SCREW M5X10 (10 PCS.) 2
22 320-229 BEARING COVER (B) 1
23 630-2VV BALL BEARING 6302VVCMPS2L 1
24 990-852 FELT PACKING (B) 1
25 320-234 SPINDLE 1
26 320-228 SEAL PLATE 1
27 320-227 PACKING GLAND 1
28 994-192
HEX. SOCKET HD. BOLT (W/FLANGE) M5X16 4
29 306-887 BOLT M8X22 1
30 306-120 WHEEL GUARD ASS’Y 1 INCLUD. 29
*31 937-907Z WHEEL WASHER (A) 1
*31 937-908Z WHEEL WASHER (B) 1 FOR AUS
32 316-825 D. C. WHEELS 230MM A24R (25 PCS.) 1
33 937-909Z WHEEL NUT M14X2 1
34 320-218 O-RING 1
35 306-890 LOCK PIN 1
36 320-223 GEAR AND PINION ASS’Y 1 INCLUD. 7, 20
37 320-216 DUST SEAL 1
38 600-0VV BALL BEARING 6000VVCMPS2L 1
39 321-536 BEARING BUSHING 1
40 325-640 HOUSING 1 INCLUD. 39, 47, 49
41 HITACHI LABEL 1
42 325-641 HANDLE (B) 1
43 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 4
44 NAME PLATE 1
45 940-540 BRUSH CAP 2
46 999-044 CARBON BRUSH (1 PAIR) 1
46 999-074 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 1

*ALTERNATIVE PARTS --- 3 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 23SR
47 980-487 BRUSH HOLDER 2
48 325-642 HANDLE (A) 1
49 938-477 HEX. SOCKET SET SCREW M5X8 2
*50 320-238
SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1OFF/LOCK
*50 320-239
SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1W/LOCK
51 960-266 CORD CLIP 1
52 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
*53 981-373 TUBE (D) 1
*53 961-820 TUBE (D) 2 FOR GBR (110V)
*54 958-049 CORD ARMOR D8.2 1
*54 940-778 CORD ARMOR D10.7 1
*55 500-247Z CORD 1 (CORD ARMOR D10.7)
*55 500-450Z CORD 1 (CORD ARMOR D10.7) FOR GBR (230V)
*55 500-246Z CORD 1 (CORD ARMOR D10.7) FOR GBR (110V)
*55 500-245Z CORD 1 (CORD ARMOR D10.7) FOR SYR
*55 500-234Z CORD 1 (CORD ARMOR D8.2) FOR IND, INA
*55 500-439Z CORD 1 (CORD ARMOR D8.2) FOR AUS

*ALTERNATIVE PARTS
--- 4 --- 4 -- 06
OPTIONAL ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
STANDARD ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
G 23SR
Printed in Japan
(060414N)
501 325-491 WRENCH 1
*502 937-917Z WHEEL NUT (B) 1 FOR AUS
*503 326-175 CASE 1 FOR EUROPE
601 323-993 PIPE HANDLE SET 1 INCLUD. 602
602 985-597 BOLT M14 2
603 310-337 SUPER WASHER 1

ELECTRIC TOOL PARTS LIST
LIST NO. E274
DISC GRINDER
Model G 23SRU
2006
•
4
•
14
(E1)
Hitachi Power Tools
30
56
59
501
34
35
36
37
38
39
40
1
2
5
3
4
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
42
43
44
45
46
47
48
49
50
51
53
54
55 57
60
61
62
63
64
52
58
17

*ALTERNATIVE PARTS--- 2 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 23SRU
1315-636 SEAL LOCK SCREW (W/SP. WASHER) M5X14 (BLACK) 2
2323-209
TAPPING SCREW (W/FLANGE) D5X35 (BLACK) 4
3306-888 PUSHING BUTTON 1
4320-219 SPRING 1
5320-217 GEAR COVER ASS’Y 1 INCLUD. 3, 4, 42, 43
6320-226 SPECIAL NUT M10 1
7320-225 PINION 1
8320-221 SEAL WASHER 1
9320-222 FELT PACKING 1
10 630-1VV BALL BEARING 6301VVCMPS2L 1
11 994-208 RUBBER RING (B) 1
12 320-220 BEARING COVER (A) 1
13 360-762E ARMATURE 220V-240V 1
14 320-215 FAN GUIDE 1
15 961-501 HEX. HD. TAPPING SCREW D5X60 2
16 340-664E STATOR ASS’Y 220V-230V 1 INCLUD. 17
17 958-032 BRUSH TERMINAL 2
18 937-981 SIDE HANDLE FOR M14 1
19 939-542
RETAINING RING FOR D12 SHAFT (10 PCS.) 1
20 320-224 GEAR 1
21 949-236 MACHINE SCREW M5X10 (10 PCS.) 2
22 320-229 BEARING COVER (B) 1
23 630-2VV BALL BEARING 6302VVCMPS2L 1
24 990-852 FELT PACKING (B) 1
25 320-234 SPINDLE 1
26 320-228 SEAL PLATE 1
27 320-227 PACKING GLAND 1
28 994-192
HEX. SOCKET HD. BOLT (W/FLANGE) M5X16 4
*29 306-887 BOLT M8X22 1 EXCEPT FOR HOL
*30 306-120 WHEEL GUARD ASS’Y 1
*30 321-547 WHEEL GUARD ASS’Y 1 INCLUD. 34-40 FOR HOL
31 937-909Z WHEEL NUT M14X2 1
32 316-825 D. C. WHEELS 230MM A24R (25 PCS.) 1
33 937-907Z WHEEL WASHER (A) 1
*34311-492 LABEL 1 FOR HOL
*35 321-546 SET PIN 1 FOR HOL
*36 321-545 LEVER 1 FOR HOL
*37 306-887 BOLT M8X22 1 FOR HOL
*38 949-457 SPRING WASHER M8 (10 PCS.) 1 FOR HOL
*39 321-544 SET PIECE 1 FOR HOL
*40 673-489
RETAINING RING (E-TYPE) FOR D5 SHAFT 1FOR HOL
42 320-218 O-RING 1
43 306-890 LOCK PIN 1
44 320-223 GEAR AND PINION ASS’Y 1 INCLUD. 7, 20
45 320-216 DUST SEAL 1
46 600-0VV BALL BEARING 6000VVCMPS2L 1
47 321-536 BEARING BUSHING 1
48 325-640 HOUSING 1 INCLUD. 47, 55, 58
49 HITACHI LABEL 1
50 325-641 HANDLE (B) 1
51 305-812 TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 4

*ALTERNATIVE PARTS --- 3 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
4 -- 06
G 23SRU
52 NAME PLATE 1
53 940-540 BRUSH CAP 2
54 999-044 CARBON BRUSH (1 PAIR) 1
54 999-074 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 1
55 980-487 BRUSH HOLDER 2
56 325-642 HANDLE (A) 1
57 320-236 RESISTOR 1
58 938-477 HEX. SOCKET SET SCREW M5X8 2
59 320-235
SWITCH (2P PILLAR TYPE) W/SAFETY LOCK 1
60 960-266 CORD CLIP 1
61 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
62 981-373 TUBE (D) 2 FOR CORD
63 940-778 CORD ARMOR D10.7 1
*64 500-247Z CORD 1 (CORD ARMOR D10.7)
*64 500-248Z CORD 1 (CORD ARMOR D10.7) FOR SUI

*ALTERNATIVE PARTS
--- 4 --- 4 -- 06
OPTIONAL ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
STANDARD ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
G 23SRU
Printed in Japan
(060414N)
501 325-491 WRENCH 1
601 323-993 PIPE HANDLE SET 1 INCLUD. 602
602 985-597 BOLT M14 2
603 310-337 SUPER WASHER 1