Crankcase And Crankshaft - Arctic Cat Cougar Service Manual

184
NOTE
Screw threads may be coated with Loc-
tite and it may be necessary to apply heat
before you can loosen the screws.
6. Remove the screws (Figure 83) securing the
reed stop and reed petals to the reed cage. Be
careful that the screwdriver does not slip and
damage parts.
7. Carefully examine the removed parts for
cracks, fatigue marks, distortion or other darn-
age.
8. Check the threaded holes in the reed cage. If
threads are damaged, replace the reed valve as-
sembly.
9. Assemble the unit as follows:
a. Locate the beveled comers of the reed petal
and the stop. Align these beveled comers at
the right comer during assembly.
b. Make sure all the parts are clean and free of
any small dirt particles or lint.
c. Before installation of the screws securing
the reed valve stop and petals, apply Loctite
271 to the screw threads.
d. Assemble and align the parts of the reed
valve, then install the retaining screws and
tighten securely.
CRANKCASE AND CRANKSHAFT
Disassembling the crankcase for access to the
crankshaft assembly requires engine removal
from the frame. The cylinder head, cylinders and
other attached assemblies can be removed with
the engine in the frame, before removing the
engine.
The diecast, thin wall aluminum alloy crank-
case (Figure 84) is precision machined in two
halves. To avoid damage to the crankcase, do not
hammer or pry on any of the interior or exterior
walls. The crankcase halves are sold only as a
matched set and if one half of the crankcase is
damaged, both must be replaced. The crankcase
halves are bolted together and aligned with
dowel pins. The crankcase is assembled without
CHAPTER FIVE
a gasket, using a light coat of RTV High Tern-
perature Silicone Sealant (part no. 0636-069).
Crankshaft service includes disassembly of
the crankshaft, replacement of unsatisfactory
parts and accurate crankshaft alignment. Special
measuring and alignment tools, a hydraulic press
and experience are necessary to disassemble,
assemble and accurately align the crankshaft
assembly. Components of the crankshaft may be