Stihl 1139 · Section F · 6 of 13 · 36 parts

Hand guard, Chain brake

Fits MS 171, MS 171 C.

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Parts (36)

Pos	Part number	Description	Qty
1	1139 792 9100	Hand guard	1
2	1121 160 5000	Lever → replaced by 1128 160 5000 TI 8/1994	1
3	1123 162 7800	Flat spring	1
4	0000 958 0521	Washer	1
5	1123 162 5800	Strap	1
6	9460 624 0400	E-clip 4	1
7	1139 160 5400	Brake band	1
8	1139 162 7900	Tension spring	1
9	1139 021 1100	Cover	1
10	1121 162 3201	Carrier	1
11	1139 162 0800	Clutch shoe	3
12	1127 162 3000	Retainer	3
13	0000 997 5600	Tension spring	3
14	1121 162 1001	Cover washer	1
15	1123 640 7102	Worm	1
16	1123 647 2400	Spring	1
17	1123 640 2073	Chain sprocket 3/8" Picco 6T	1
18	1123 640 2007 NLA	Chain sprocket 1/4" 8T option	1
19	9512 933 2260	Needle cage 10x13x10	1
20	0000 958 1022	Washer Ø 27 mm	1
21	9460 624 0801	E-clip 8x1.3	1
22	1123 007 1004	Spur gear / chain adjusting screw kit	1
23	1123 640 1900	Tensioner slide	1
24	1123 664 1400	Thrust pad	1
25	1123 664 2200	Cover	1
26	9075 478 3015	Pan head self-tapping screw IS-D4x15	1
27	1123 664 0500	Bumper spike option	1
28	9075 478 4115	Pan head self-tapping screw IS-D5x16 option	2
29	1139 640 1700	Chain sprocket cover	1
30	0000 955 0801	Hexagon nut M8	1
31	0000 967 3630	Instruction label	1
32	1139 650 7700	Chain catcher	1
33	9062 319 1270	Countersunk screw M6x14	1
34	9214 320 0900	Lock nut M6	1
Not numbered on the diagram — assemblies, kits and options
—	1139 160 2000	Clutch	1
—	1123 007 1000	Chain tensioner kit	1

2012 service parts catalogue. Parts are not interchangeable across engine series — check yours before ordering. NLA = withdrawn by STIHL before 2012.

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