BRP BOMBARDIER DS250 2006 Shop Manual page 116

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First, torque crankcase bolts in a criss-cross se-
quence to half torque value. Ensure crankcase
halves are properly aligned. Then, tighten bolts to
final torque using the same sequence.
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Properly torque bolts on the right half crankcase.
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Subsection 10 (CRANKSHAFT AND CRANKCASE)
Clean the crankshaft.
Apply a layer of grease on the lip of oil seal. Put
seal on crankshaft.
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Using an suitable pusher, install the oil seal in the
left half crankcase with care not to damage the lip
of the oil seal.
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Install the chain guide and tighten the pivot bolt.
Properly torque bolt.
Install the timing chain.
Install the timing chain locking plate.
Section 03 ENGINE
97