Clutch, Chain Drive; Chain Brake And Chain; Tensioner; Clutch Drum/Chain Sprocket - Stihl 064 Service Manual

STIHL 064, 066

CLUTCH, CHAIN DRIVE,

3.

CHAIN BRAKE AND CHAIN

TENSIONER

3.1 Clutch Drum/Chain
Sprocket
Top:
1 = Saw chain
2 = Guide bar
3 = Sprocket cover
Bottom:
Disengaging chain brake
- Unscrew sprocket cover nuts and remove
sprocket cover.
- Remove saw chain and guide bar.
- Disengage the chain brake by pulling the
hand guard toward the front handle.
Top:
Removing E-clip
Bottom:
Removing clutch drum or chain sprocket
- Pry the E-clip off the crankshaft.
- Remove the washer from the clutch drum
or chain sprocket.
- Pull off the rim sprocket with clutch drum
or the spur spocket.
- Take the needle cage out of the clutch
drum or chain sprocket.
Reassemble in the reverse sequence.
Top:
Removing needle cage
Bottom:
Assembly sequence of chain drive
1 = Spur sprocket (with clutch drum)
2 = Needle cage
3 = Washer
4 = E-clip
5 = Clutch drum (for rim sprocket)
6 = Rim sprocket
Caution: Rim sprocket must be fitted
with chip ejector cavities facing
outward.
Note: Clean stub of crankshaft. Replace
the needle cage or wash it in clean white
spirit and lubricate with STIHL
multipurpose grease, see 12.2.
Rotate the clutch drum or spur sprocket,
apply slight pressure at the same time, until
the oil pump drive spring engages the slot
on the outside diameter of the drum.
16