P 5 /10
R
epair
Fig. M-1
Fig. M-2
Fig. M-3
Fig. M-4
Refer to the explanation below when repairing Brake mechanism.
These models are equipped with the following two brake systems.
A. Brake Synchronized with Switch Lever
This brake works when Switch lever is released to stop operation. (Figs. M-1, M-2, M-3)
B. Kick Back Brake
This brake works when Front hand guard is pushed towards Chain bar. The machine stops even if Switch lever stays
in ON position. (Fig. M-4)
Principle of Brake Mechanism
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Brake Mechanism and Armature
When Switch Lever is Pulled
Kick Back Brake
When Switch Lever is Released
Brake band is also pulled to unlock the drum portion
of Armature, and Armature starts rotating.
1) When Front hand guard is pushed towards Chain bar, Link plate complete is bent by the projection on the guard.
2) Brake band is pulled by the bent Link plate complete. (The tension force of Compression spring 9 keeps Link plate
complete bent.)
3) The drum portion of Armature is locked by Brake band to stop the rotation of Armature.
Brake band returns to the initial position to lock
the drum portion of Armature, and Armature immediately
stops rotating.
Link plate complete
Brake band
Switch Lever
drum portion
of Armature
Compression spring 9
projection on
Front hand guard
projection on
Front hand guard
Link plate complete
Compression spring 9
Brake band
Brake band
Switch lever
Rod
Before Pulling Switch Lever
Switch lever
in ON position
drum portion
of Armature
drum portion of Armature
Brake mechanism viewed from the Housing (R) side