Chain Brake; Tools, Servicing Aids; Removing The Brake Band, Spring And Lever - Stihl MS 500i Service Manual

13 Chain Brake

13.1

Tools, Servicing Aids

Screwdriver – 0000 890 2300 or equivalent
–
Socket, T27x125 – 0812 542 2104 or equivalent
–
Assembly tool – 1117 890 0900
–
Combination wrench – 1142 890 3400
–
Torque wrench – 5910 890 0302 or equivalent
–
Screwdriver, T27x200 – 5910 890 2415 or equivalent
–
Hook – 5910 890 2800
–
Flat nose side cutting pliers
–
STIHL multipurpose grease – 0781 120 1110
–
Loctite 242 (medium-strength threadlocking
–
adhesive) – 0786 111 2101
13.2

Removing the Brake Band, Spring and Lever

Preparations, @ 3.1.
N
Remove the chain sprocket cover.
N
Remove the clutch drum, @ 11.2.
N
Take out the screw (1).
N
Remove the side plate (2).
N
Take out the screws (3).
N
Remove the cover (4).
N
Engage the chain brake.
N
Take out the screw (5).
N
Pull the brake band (6) out of its seat.
N
18
8
7
6
5
M4x12 (3 Nm / 27 lbf. in.)
14
M5x20
(6 Nm /
53 lbf. in.)
13
12
11
10
9
4
3
M4x12
(2.5 Nm / 22 lbf. in.)
Unhook the brake band (6) from the lever (13).
N
Install a new brake band (6) if:
N
there are noticeable signs of wear on the inside
–
diameter
the remaining thickness is less than 0.6 mm
–
(0.0024 in).
Use hook 5910 890 2800 to disconnect short end of
N
brake spring (8).
Unhook the brake spring (8) from the lever (13).
N
Pull the protective tube (7) off the brake spring (8).
N
If the turns of the brake spring (8) are not tightly
N
against one another, install a new spring.
Remove the E-clip (12).
N
Take out the screw (14).
N
Remove the hand guard (15) with brake lever (13).
N
Pull the lever (13) out of the hand guard (15).
N
Disconnect and remove the torsion spring (11) from
N
the lever (9).
Remove the E-clip (10).
N
Remove the lever (9).
N
15
3
M4x12 (2.5 Nm / 22 lbf. in.)
2
1
M4x8
(2 Nm / 18 lbf. in.)
MS 500i