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

20 Crankcase, Crankshaft, Oil Seals

A
4
3 M5x16
(9 Nm /
2
80 lbf. in.)
1
7
6
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

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).
N
52
A
5
18
B
8
9
M6x30
(1: 4 Nm / 35 lbf. in
2: 12 Nm / 106 lbf. in.)
20.3 Installing the Collar Studs
If the original studs (4) are re-used: Coat threads of
N
collar studs (4) with Loctite 270.
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.
N
20.4 Removing the Engine Pan and Oil Seals
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).
N
16
15
14
17
13
12
11
10
BR 800
B