Stihl BR 800 - 20 Crankcase, Crankshaft, Oil Seals; Tools, Servicing Aids; Removing the Collar Studs

BR 80052
20.1 Tools, Servicing Aids
– Socket, T27x125 – 0812 542 2104 or equivalent
– Assembly drift – 1108 893 4700
– Locking screw – 4282 890 2700
– Torque wrench – 5910 890 0302 or equivalent
– Installing tool – 5910 890 2213
– Screwdriver, T27x200 – 5910 890 2415 or equivalent
– Punch-down tool – 5910 890 4000
– STIHL multipurpose grease – 0781 120 1110
– HT red silicone sealant – 0783 830 2000
– Loctite 270 (high-strength threadlocking adhesive) –
0786 111 2109
– Two-stroke engine oil
20.2 Removing the Collar Studs
N Preparations, @ 3.1.
N Remove the cover, @ 7.4.
N Remove the spark plug (1).
N Remove the valve cover, @ 18.2.
N Remove rocker arms, @ 18.2.
N Unscrew the collar stud (4).
N Clean threads in cylinder and on collar studs (4).
20.3 Installing the Collar Studs
N If the original studs (4) are re-used: Coat threads of
collar studs (4) with Loctite 270.
N Insert and tighten down the collar studs (4).
N Install rocker arms, @ 18.2.
N Adjust valve clearance, @ 12.2.
N Install valve cover, @ 18.6.
N Install the spark plug (1).
N Install the cover, @ 7.4.
20.4 Removing the Engine Pan and Oil Seals
N Preparations, @ 3.1.
N Remove the rewind starter, @ 6.2.
N Remove the air filter, @ 7.2.
N Remove the shroud, @ 7.4.
N Remove filter housing and carburetor, @ 8.2.
N Remove the airflow shroud, @ 14.2.
N Remove the backplate, @ 10.9.
N Remove outer blower housing and elbow, @ 17.4.
N Remove the blower wheel, @ 17.5.
N Remove inner blower housing, @ 17.6.
N Take out the screws (9).
20 Crankcase, Crankshaft, Oil Seals
4 M5x16
(9 Nm /
80 lbf. in.)
5
8
16
15
14
13
9 M6x30
(1: 4 Nm / 35 lbf. in
2: 12 Nm / 106 lbf. in.)
6
1
17
18
12
11
10
7
2
3
B
A
A B
0000-GXX-6682-A0