Servicing Top-Side Components - Arctic Cat Altera 300 Service Manual

KM451
11. Using Piston Pin Puller, remove the piston pin.
Account for the opposite-side circlip. Remove the
piston.
NOTE: It is advisable to remove the opposite-side

circlip prior to using the puller.
NOTE: Support the connecting rod with rubber

bands to avoid damaging the rod or install a connect-
ing rod holder.
CAUTION
Do not allow the connecting rod to go down inside the
crankcase. If the rod is down inside the crankcase and
the crankshaft is rotated, severe damage will result.
 NOTE: If the existing rings will not be replaced with
new rings, note the location of each ring for proper
installation. When replacing with new rings, replace
as a complete set only. If the piston rings must be
removed, remove them in this sequence.
A. Starting with the top ring, slide one end of the ring
out of the ring-groove.
B. Remove each ring by working it toward the dome of
the piston while rotating it out of the groove.
AT THIS POINT

To service piston, see Servicing Top-Side Components
sub-section.
AT THIS POINT

To service center crankcase components only, proceed
to Removing Left-Side Components.
Servicing Top-Side
Components
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
discoloration, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it must

be replaced.
Cleaning/Inspecting Camshaft Holder
1. Remove the rocker arm shafts, rocker arms, and stop
plate from the camshaft holder.
KM708A
2. Inspect the camshaft holder for cracks, distortion, or
galling.
3. Inspect the rocker arm shafts for blue discoloration
or scoring.
4. Inspect the rocker arms for excessive wear, loose
adjusters, or scored camshaft followers.
KM710A
Removing Valves
NOTE: Keep all valves and valve components as a

set. Note the original location of each valve set for use
during installation. Return each valve set to its origi-
nal location during installation.
1. Using a valve spring compressor, compress the valve
springs and remove the valve cotters. Account for an
upper spring retainer.
KM717A
2. Remove the valve seal, valve springs, and the lower
remaining spring seat. Discard the valve seal.
NOTE: The valve seals must be replaced.

3. Invert the cylinder head and remove the valves.
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