Zenoah BK3501FL, BK4501FL, BK5301DL User Manual

T1251-93120 (211)

BRUSHCUTTERS

November 2002

APPLICABLE SERIAL NUMBERS:

NOTE :

1. Use KOMATSU ZENOAH genuine parts as specified in the parts list for repair and/or replacement.

2. KOMATSU ZENOAH does not warrant the machines, which have been damaged by the use of any
parts other than those specified by the company.

3. When placing parts orders for repair and/or replacement, check if the model name and the serial
number are applicable to those specified in the parts list, then use parts number described in the
parts list.

4. The contents described in the parts list are accurate as of the date and may change due to
improvement.

5. The parts for the machine shall be supplied ten (10) years after the machine is discontinued. [It is
possible that some specific parts may be subject to change of their delivery term and list price
within the limit of ten (10) years after the machine is discontinued. It is also possible that some
parts may be available even after the limit of ten (10) years.]

BK3501FL
BK4501FL
BK5301DL

200101 and up

Fig.1 CUTTER GROUP

BK3501FL/BK4501FL/BK5301DL

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

1 T3217-12100 PIPE-COMP ø26xL1500(t1.5) 1
2 3180-11321 • BUSHING 6
3 6129-12120 • BEARING-COMP 1
4 6129-12210 SHAFT ø7x1468 1
5 6129-12220 SHAFT, JOINT 1
6 6129-12230 CLAMP 1
7 0263-10510 SCREW 1
8 01252-30520 BOLT 1

9 6522-13000 GEARCASE ASS'Y 1
10 6522-13110 • GEARCASE 1
11 06000-06000 • BEARING 2
12 06000-06202 • BEARING 1
13 3130-13141 • SEAL 1
14 04065-03515 • RING,SNAP 1
15 01252-30510 • BOLT 1 M5x10
16 3540-13212 • SHAFT 1
17 3540-13220 • GEAR 1
18 3544-13280 • WASHER 1 M10(L)
19 01643-31032 • WASHER 1
20 3540-13290 • BOLT M10xP1.25x28(L) 1
21 6522-13310 • PINION 1
22 06001-06000 • BEARING 1
23 3180-13330 • RING 1
24 04065-02612 • RING 1
25 3540-13260 • BOLT 1 M6x35
26 0224-40610 • BOLT 1 M6x10
27 6251-13240 • HOLDER(A) 1
28 3540-13251 • HOLDER(B) 1
29 6178-12400 GRIP ASS'Y 1
30 6464-12230 • LEVER, throttle 1
31 6464-12240 • LEVER 1
32 1638-84150 • STOPPER 1
33 1638-84160 • CLAMP 1
34 6464-12250 • CLAMP 1
35 6178-12230 • CABLE-A 1
36 1638-84170 • SPRING 1
37 1638-84180 • SPRING 1
38 0263-60620 • SCREW 2 M6x20
39 1638-84190 • NUT 2 M6xP1.0
40 1638-84220 • SCREW, tapping 4 TP4xL18
41 6178-12530 • JOINT 1
42 6129-21000 SHAFT, FLEX-ASSY 1
43 6129-21110 • SHAFT-FLEX ø7.8xL845 1
44 6129-21120 • LINER ø22.5xL840 1
45 07000-12018 • O-RING ø17.8xø2.4 1
46 T3223-12510 PLATE NAME 1

BK3501DL

47 T3224-12510 PLATE NAME 1

BK4501FL

48 T3225-12510 PLATE NAME 1

BK5301FL
49 T1141-37100 BACK CUSHION 1
50 6425-12552 PLATE 1
51 3540-13283 COVER 1
52 6251-15910 COVER 1
53 T3112-14000 HANDLE ASS'Y 1
54 T3112-14110 • HANDLE 1
55 0263-90530 • SCREW 4
56 6298-E3390 SAW 1
57 6489-24000 GUARD-ASS'Y 1
58 6489-24110 • GUARD 1
59 6489-24200 • PLATE-COMP 1
60 6489-24210 • • PLATE 1
61 6489-24220 • • BLADE 1
62 0277-10412 • • SCREW, tapping 1 TP4x12
63 6489-24120 • PLATE 1
64 01252-30516 • BOLT 4 M5x16

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

65 01601-20513 • WASHER 4 M5
66 T1141-35100 FRAME COMP 1
67 6129-51201 PLATE, ENGINE COMP 1
68 0224-30625 BOLT 1 M6x25
69 0280-10605 NUT 1 M6
70 6129-51310 JOINT 3
71 1610-13120 NUT 6 M5xP0.8

BK3501FL

72 4551-13311 BRACKET, ENGINE 1

BK4501FL

73 6129-51410 BRACKET, ENGINE 1

BK5301DL
74 01641-21423 WASHER 2
75 04064-01510 SNAP RING 1
76 3310-31720 BOLT 4 M5x14
77 T3113-91000 TOOL-SET 1
78 1030-91340 • DRIVER 1
79 3144-91160 • SOCKET 1
80 09007-00425 • WRENCH 1
81 09007-00528 • WRENCH 1
82 3540-91110 • BAR 1
83 6044-21160 CLAMP 2
84 T1251-93110 MANUAL 1

Fig.1 CUTTER GROUP

BK3501FL/BK4501FL/BK5301DL

Fig.2 ENGINE GROUP

BK3501FL

Fig.2 ENGINE GROUP

BK3501FL

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

1 T1151-12110 CYLINDER 1
2 1850-12130 BOLT 4 M5x22
3 4500-13120 GASKET, base 1
4 4500-21101 CRANKCASE COMP. 1
5 2629-21130 • PIN 3
6 4500-22110 GARD 1
7 0263-90514 SCREW 1 M5x14
8 4500-21140 GASKET, case 1

9 06030-06201 BEARING 2
10 4810-21210 SEAL 1
11 1650-21220 OIL SEAL 1
12 01252-30530 BOLT 4 M5x30
13 04065-03212 SNAP RING 1
14 4700-41110 PISTON 1
15 1650-41210 RING 2
16 1030-41310 PIN 1
17 1300-41320 RING 2
18 T2100-41410 BEARING 1
19 2850-41510 WASHER 2
20 4500-42000 CRANKSHAFT COMP. 1
21 1400-51111 SHOE, clutch 2
22 1651-51220 SPRING 1
23 1200-51211 SCREW 2
24 1200-51230 WASHER 2
25 1200-51241 WASHER 2
26 T1153-71110 ROTOR 1
27 T1153-71200 COIL ASS'Y 1
28 4500-71220 • CORD 1
29 2616-71320 • CAP 1
30 T1153-71250 • PIN 2
31 5500-72130 • GROMMET 1
32 5500-72110 • CAP, plug 1
33 5500-72120 • SPRING 1
34 T1512-71320 • TUBE 1
35 3350-14150 BOLT 2 M4x20
36 1650-43230 NUT 1 M8xP1.0
37 1000-43240 KEY 1
38 T1173-31100 HOUSING ASS'Y 1
39 06002-06001 • BEARING 1
40 04065-02812 • RING 1
41 T3087-12600 • STOPPER COMP 1
42 6278-12311 • DRUM 1
43 04064-01210 • SNAP RING 1
44 3310-12281 SCREW 4 M5x20
45 T1024-15110 MUFFLER 1
46 01252-30560 BOLT 2 M5x60
47 3310-31720 BOLT 1 M5x14
48 4700-15211 GASKET 1
49 4500-15221 PLATE 1
50 0263-90514 SCREW 1
51 4500-31210 PLATE 1
52 4550-32110 COVER 1
53 4500-32120 SCREW 4 M5x12
54 4500-32210 GUARD 1
55 5933-73110 SPARKPLUG NGK BPMR7A 1
56 1852-72121 GROMMET 1
57 T1183-73200 CORD COMP 1
58 4500-75100 RECOIL ASS'Y 1
59 4500-75120 • REEL 1
60 4500-75150 • SCREW 1
61 1850-75130 • SPRING, spiral 1
62 4500-75180 • COLLAR 1
63 4500-75190 • ARM 1
64 4500-75160 • ROPE 1
65 1140-75320 • KNOB 1
66 5500-75170 • PLATE, stopper 1
67 4500-75210 PULLEY 1
68 4500-75511 SCREW 4 M6x14

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

69 4700-75310 COLLAR 1
70 4550-13160 INSULATOR 1
71 4500-13150 GASKET, insulator 1
72 4550-13130 GASKET, carburetor 1
73 T1151-81001 CARBURETOR ASS'Y 1 G11P-1S
74 1650-81122 • CAP, BODY 1
75 T1151-81150 • VALVE, THROTTLE 1
76 1030-81000-14 • SPRING, THROTTLE 1
77 1030-81000-17 • SPRING RECEIVE 1
78 T1151-81210 • NEEDLE, JET 1
79 1030-81000-16 • CLIP 1
80 1400-81230 • JET, NEEDLE 1

NJ ø2.097
81 T1151-81240 • JET, MAIN 1 #59
82 1335-81180 • FLOAT 1
83 1400-81340 • HINGE 1
84 1400-81350 • PIN 1
85 1650-81361 • VALVE 1
86 1650-81251 • SCREW, ADJUST 1
87 1650-81260 • SPRING, ADJUST 1
88 1403-81500 • COCK 1
89 1400-81540 • RING 1
90 0260-10410 • SCREW 2
91 1400-81320 • PACKING 1
92 1400-81310 • CHAMBER 1
93 1400-81650 • SCREW, DRAIN 1
94 1400-81660 • PACKING 1
95 1141-81120 • CAP 1
96 1650-81710 • PIPE 1
97 0260-10412 • SCREW 2 M4x16
98 0263-90565 SCREW 2
99 1400-82002 CLEANER ASS'Y 1

100 1400-82113 • BODY 1
101 1400-82121 • COVER 1
102 1418-82130 • ELEMENT 1
103 1400-82141 • SCREEN 1
104 4550-82150 SCREW 2 M4x25
105 1133-82060 LABEL 1
106 T1055-85000 TANK ASS'Y 1
107 2133-85302 • CAP ASS'Y 1
108 4570-85230 • • CAP INNER 1
109 1030-85141 • • ELEMENT 1
110 4500-85220 • • PACKING 1
111 3317-57242 • • STOPPER 1
112 4551-85101 • JOINT ASS'Y 1
113 1400-85141 • • GROMMET 1
114 3063-22510 • • CLIP 1
115 4551-86111 • • PIPE 1
116 3570-15311 • SPRING 1
117 3063-22510 • CLIP 1
118 1535-85520 BAND 2
119 2193-86150 CLAMP 1
120 1660-31121 LABEL COVER 1
121 T1072-75410 LABEL RECOIL 1
122 2634-31420 LABEL 1
123 T1062-83100 CABLE-C 1

Fig.3 ENGINE GROUP

BK4501FL

Fig.3 ENGINE GROUP

BK4501FL

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

1 4500-12110 CYLINDER 1
2 1850-12130 BOLT 4 M5x22
3 4500-13120 GASKET, base 1
4 4500-21101 CRANKCASE COMP. 1
5 2629-21130 • PIN 3
6 4500-22110 GARD 1
7 0263-90514 SCREW 1 M5x14
8 4500-21140 GASKET, case 1

9 06030-06201 BEARING 2
10 4810-21210 SEAL 1
11 1650-21220 OIL SEAL 1
12 01252-30530 BOLT 4 M5x30
13 04065-03212 SNAP RING 1
14 4500-41110 PISTON 1
15 1400-41220 RING 2
16 2850-41310 PIN 1
17 1300-41320 RING 2
18 T2100-41410 BEARING 1
19 2850-41510 WASHER 2
20 4500-42000 CRANKSHAFT COMP. 1
21 4500-51111 SHOE, clutch 2
22 4500-51220 SPRING 1
23 1200-51211 SCREW 2
24 1200-51230 WASHER 2
25 1200-51241 WASHER 2
26 T1153-71110 ROTOR 1
27 T1162-71200 COIL ASS'Y 1
28 4500-71220 • CORD 1
29 2616-71320 • CAP 1
30 T1153-71250 • PIN 2
31 5500-72130 • GROMMET 1
32 5500-72110 • CAP, plug 1
33 5500-72120 • SPRING 1
34 T1512-71320 • TUBE 1
35 3350-14150 BOLT 2 M4x20
36 1650-43230 NUT 1 M8xP1.0
37 1000-43240 KEY 1
38 T1173-31100 HOUSING ASS'Y 1
39 06002-06001 • BEARING 1
40 04065-02812 • RING 1
41 T3087-12600 • STOPPER COMP 1
42 6278-12311 • DRUM 1
43 04064-01210 • SNAP RING 1
44 3310-12281 SCREW 4 M5x20
45 4550-15110 MUFFLER 1
46 01252-30565 BOLT 2 M5x65
47 3310-31720 BOLT 1 M5x14
48 4700-15211 GASKET 1
49 4500-15221 PLATE 1
50 0263-90514 SCREW 1
51 4500-31210 PLATE 1
52 4550-32110 COVER 1
53 4500-32120 SCREW 4 M5x12
54 4500-32210 GUARD 1
55 5933-73110

SPARKPLUG NGK BPMR7A

1
56 1852-72121 GROMMET 1
57 T1183-73200 CORD COMP 1
58 4500-75100 RECOIL ASS'Y 1
59 4500-75120 • REEL 1
60 4500-75150 • SCREW 1
61 1850-75130 • SPRING, spiral 1
62 4500-75180 • COLLAR 1
63 4500-75190 • ARM 1
64 4500-75160 • ROPE 1
65 1140-75320 • KNOB 1
66 5500-75170 • PLATE, stopper 1
67 4500-75210 PULLEY 1
68 4500-75511 SCREW 4 M6x14

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

69 4700-75310 COLLOR 1
70 4550-13160 INSULATOR 1
71 4500-13150 GASKET, insulator 1
72 4550-13130 GASKET, carburetor 1
73 T1162-81000 CARBURETOR ASS'Y 1 G12P-1A
74 1335-81060 • SPRING 1
75 4550-81150 • VALVE, THROTTLE 1
76 4550-81210 • NEEDLE, JET 1
77 1030-81000-16 • CLIP 1
78 T1012-81070 • RECEIVE 1
79 1620-81230 • JET, NEEDLE 1
80 1620-81240 • JET, MAIN 1 #67
81 1335-81180 • FLOAT 1
82 1400-81310 • CHAMBER 1
83 1400-81320 • PACKING 1
84 0260-10412 • SCREW 2 M4x16
85 1650-81121 • CAP, BODY 1
86 1141-81120 • CAP 1
87 1400-81361 • VALVE,NEEDLE 1
88 1400-81540 • O-RING 1
89 1400-81340 • HINGE 1
90 1400-81350 • PIN 1
91 0260-10410 • SCREW 2 M3x6
92 1403-81500 • COCK ASS'Y 1
93 1650-81260 • SPRING 1
94 2751-81250 • SCREW,ADJUSTER 1
95 4550-81710 • PIPE 1
96 1400-81650 • SCREW,DRAIN 1
97 1400-81660 • PACKING 1
98 0263-90565 SCREW 2 M5x60

99 1400-82002 CLEANER ASS'Y 1
100 1400-82113 • BODY 1
101 1400-82121 • COVER 1
102 1418-82130 • ELEMENT 1
103 1400-82141 • SCREEN 1
104 4550-82150 SCREW 2 M4x25
105 1133-82060 LABEL 1
106 T1055-85000 TANK ASS'Y 1
107 2133-85302 • CAP ASS'Y 1
108 4570-85230 • • CAP INNER 1
109 1030-85141 • • ELEMENT 1
110 4500-85220 • • PACKING 1
111 3317-57242 • • STOPPER 1
112 4551-85101 • JOINT ASS'Y 1
113 1400-85141 • • GROMMET 1
114 3063-22510 • • CLIP 1
115 4551-86111 • • PIPE 1
116 3570-15311 • SPRING 1
117 3063-22510 • CLIP 1
118 1535-85520 BAND 2
119 2193-86150 CLAMP 1
120 1660-31121 LABEL COVER 1
121 T1117-75411 LABEL RECOIL 1
122 2634-31420 LABEL 1
123 T1062-83100 CABLE-C 1

Fig.4 ENGINE GROUP

BK5301DL

Fig.4 ENGINE GROUP

BK5301DL

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

1 1580-12101 CYLINDER COMP 1
2 1580-12150 • STUD 2
3 1850-12130 BOLT 4 M5x22
4 0260-30540 SCREW 2 M5x40
5 0260-30560 SCREW 2 M5x60
6 1400-13122 GASKET, base 1
7 1460-13131 GASKET, cab 1
8 1580-13141 GASKET, muffler 1

9 1400-13151 GASKET, insulator 1
10 1460-13163 INSULATOR 1
11 1400-21100 CRANKCASE COMP 1
12 2629-21130 • PIN 3
13 1400-21141 GASKET, case 1
14 06030-06202 BEARING 2
15 1520-21220 SEAL 1
16 1400-21220 SEAL 1
17 04065-03515 SNAP RING 1
18 01252-30530 BOLT 4 M5x30
19 2155-21311 GUARD 1
20 0263-90514 SCREW 2 M5x14
21 3360-41110 PISTON 1
22 3360-41211 RING 2
23 3360-41310 PIN 1
24 3350-41320 RING 2
25 1400-41410 BEARING 1
26 2670-41510 WASHER 2
27 1400-42002 CRANKSHAFT COMP. 1
28 1300-42410 SHIM 1
29 1400-43230 NUT 2 M10xP1.0
30 1000-43240 KEY 1
31 4500-51111 SHOE, clutch 2
32 4500-51220 SPRING 1
33 1200-51211 SCREW 2
34 1200-51230 WASHER 2
35 1200-51241 WASHER 2
36 2073-71110 ROTOR 1
37 2104-71200 COIL ASS'Y 1
38 2104-71220 • CORD 1
39 2616-71320 • CAP 1
40 5500-72130 GROMMET 1
41 1100-72120 GROMMET 1
42 5500-72110 CAP, plug 1
43 1900-72120 SPRING 1
44 0263-90520 SCREW 2 M5x20
45 6129-11100 HOUSING ASS'Y 1
46 06002-06001 • BEARING 1
47 04065-02812 • RING 1
48 3577-12200 • STOPPER COMP 1
49 6278-12311 • DRUM 1
50 04064-01210 • SNAP RING 1
51 6468-91150 SCREW 4
52 1418-15110 MUFFLER 1
53 0263-90512 SCREW 4 M5x12
54 1140-51230 WASHER 2
55 1580-15230 NUT 2 M6xP1.0
56 1411-15410 COVER 1
57 1400-31113 COVER, FAN 1
58 3310-12281 BOLT 4 M5x20
59 1100-72120 GROMMET 1
60 1411-32111 COVER 1
61 0263-90512 SCREW 2 M5x12
62 2193-86150 CLAMP 1
63 1140-72231 CLAMP 1
64 0263-90512 SCREW 1 M5x12
65 5535-73110 SPARKPLUG NGK BPMR6A 1
66 2132-71240 CORD 1
67 1621-14400 CORD COMP 1
68 3294-18150 CLAMP 1

Q'TY

Key# PART NUMBER DESCRIPTION NOTE

/UNIT

69 1487-75101 RECOIL ASS'Y 1
70 1180-75221 • SPRING 1
71 1487-75120 • REEL 1
72 1487-75140 • DOG 1
73 1861-75150 • WASHER 1
74 1483-75270 • SCREW 1
75 1487-75160 • RETAINER 1
76 1487-75170 • WASHER 1
77 1400-75160 • ROPE 1
78 1400-75170 • KNOB 1
79 1487-75211 PULLEY 1
80 0263-90520 SCREW 4 M5x20
81 1587-81003 CARBURETOR ASS'Y 1 WYK-36A
82 1850-81450 • BODY ASS'Y 1
83 3306-81380 • • SCREEN 1
84 3356-81310 • • VALVE 1
85 1850-81270 • • SPRING 1
86 1850-81220 • • SCREW 1
87 3310-81250 • • PIN 1
88 3310-81230 • • LEVER 1
89 1850-81490 • BODY 1
90 1850-81520 • COVER 1
91 1751-81510 • PUMP 1
92 1587-81151 • VALVE, THROTTLE 1
93 5500-81160 • WASHER 1
94 1881-81140 • SWIVEL 1
95 1751-81130 • E-RING 1
96 1065-81410 • GASKET 1
97 1065-81420 • DIAPHRAGM, pump 1
98 1850-81470 • GASKET 1

99 3310-81260 • DIAPHRAGM ASS'Y 1
100 1752-81110 • SCREW 2
101 5500-81120 • BRACKET 1
102 1751-81180 • NUT 1
103 1601-81180 • SCREW 1
104 1881-81130 • RING, PACKING 1
105 1850-81530 • SCREW 4
106 1587-81610 • JET 1 #55
107 1751-81240 • O-RING 1
108 4500-81910 COVER 1
109 1918-82001 CLEANER ASS'Y 1
110 1918-82110 • COVER 1
111 1918-82120 • FILTER 2
112 1918-82130 • HOUSING 1
113 1918-82140 • PLATE 1
114 1918-82150 • CHOKE VALVE 1
115 1918-82160 • WASHER 1
116 1918-82170 • SLEEVE 2
117 1918-82180 • SCREEN 1
118 1588-83100 CABLE COMP 1
119 1586-85001 TANK ASS'Y 1
120 2133-85302 • CAP ASS'Y 1
121 4570-85230 • • CAP INNER 1
122 1030-85141 • • ELEMENT 1
123 4500-85220 • • PACKING 1
124 3317-57242 • • STOPPER 1
125 6044-15202 • PIPE COMP 1
126 3302-85400 • FILTER 1
127 1260-85460 • CLIP 1
128 6044-15310 SPRING 1
129 1535-85520 BAND 2
130 6086-85470 CLIP 1
131 1660-31121 LABEL COVER 1
132 1580-75412 LABEL RECOIL 1
133 2634-31420 LABEL 1

1-9 Minamidai, Kawagoe, Saitama, 350-1192 Japan

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