BR 80048
18.3 Removing Cam Followers and Cam Gear
N Remove rocker arms (9) and pushrods (8), @ 18.2.
N Remove outer blower housing, @ 17.4.
N Remove the blower wheel, @ 17.5.
N Remove the locking screw 4282 890 2700.
N Take out the screws (1).
N Grip cooling fins of cover (2) with flat nose pliers and
pull cover away.
N If necessary: Use hook 5910 890 2800 as additional
aid to remove the cover (2). Leverage points:
Disassembly aids (arrows) on cover (2).
N If the cover (2) cannot be removed with the inner
blower housing in place: Remove inner blower
housing, @ 17.6, and pry off the cover (2). Leverage
points: Disassembly aids (arrows) on cover (2).
N Pull out the pin (6).
N Take out the cam followers (3 and 4).
N Pull out the pin (5).
N Remove the cam gear (7).
N Clean sealing faces on cylinder and cover (2).
18.4 Checking Decompression System
N Remove the cover (2), @ 18.3.
N Check lever (arrow) of decompression system to
make sure the following points apply:
– Lever (arrow) must project about 2 mm from cam of
cam gear (7).
– Push lever (arrow) clockwise. The lever (arrow) must
move freely and disappear completely.
– Release the lever (arrow). Lever (arrow) must spring
back to its original position.
N If the lever (arrow) is stiff, worn or not visible: Install
new cam gear (7), @ 18.3.
18.5 Installing Cam Followers and Cam Gear
N Lubricate all parts with two-stroke engine oil before
installation.
N Fit the cam gear (7) so that the arrows on it line up
with the lugs (arrows) in the cylinder.
N Fit the pin (5).
N Rotate the crankshaft so that the tip of the cam on the
cam gear (7) faces down.
N Fit the pin (6).
N Fit the cam follower (4).
N Fit the cam follower (3).
N Install rocker arms (9) and pushrods (8), @ 18.6.
18.6 Installing Rocker Arms and Pushrods
N Lubricate all parts with two-stroke engine oil before
installation.
N Rotate the crankshaft so that the tip of the cam on the
cam gear (7) faces down.
N Fit the pushrods (8) so that their ends are seated in
the cam followers (3 and 4).
N Fit the rocker arms (9) on the collar studs so that they
are seated on the pushrods (8).
N Fit the sleeves (10).
N Fit locknuts (11) on the collar studs.
N Check that the ends of the pushrods (8) are seated in
the cam followers (3 and 4).
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