Stihl 021 Service & Repair Manual page 10

•
From serial number
X 28 310 255, remove the flat
spring.
- Inspect parts and replace if
damaged.
- Clean the entire housing recess
for the chain brake.
- If the groove of the brake spring
anchor pin is worn, replace the
housing.
10
4.4.3 Assembly
- Lubricate sliding and bearing
points of chain brake with STIHL
multipurpose grease or,
preferably, Molykote grease -
see 11.2.
- From serial number
X 28 310 255, install the flat
spring.
- Up to serial number
X 28 310 254, fit the cam lever.
•
Attach spring to cam lever (open
side of spring hook facing
outwards) and slip it over the
pivot pin
•
Insert the bell crank in the side of
the hand guard so that the short
arm of the bell crank points to
top of hand guard.
1
•
Position the hand guard (1)
against the pivot pin and fit the
other side of the hand guard
over the housing.
•
Position the bell crank (2)
against the pivot pin.
•
Press the cam lever (3) slightly
downward and push the hand
guard and bell crank onto their
pivot pins.
1
2
•
Check that cam lever or flat
spring (1) is properly located on
face (2) of hand guard bearing
boss.
021, 023, 025
3 2