General; Crankcase Disassembly - BRP BOMBARDIER DS250 2006 Shop Manual

Section 03 ENGINE
Subsection 10 (CRANKSHAFT AND CRANKCASE)

GENERAL

During assembly/installation, use the torque val-
ues and service products as in the exploded
views.
WARNING
Torque wrench tightening specifications
must strictly be adhered to.
Locking devices (ex.: locking tabs, elastic
stop nuts, self-locking fasteners, etc.) must
be installed or replaced with new ones where
specified. If the efficiency of a locking device
is impaired, it must be renewed.
Oil Seals
NOTE: Oil seals can be replaced when engine is
installed in vehicle.
Using a small tool, like an awl or a pick, remove oil
seal from its housing.
CAUTION: Pay attention not to damage shaft
during removal of oil seal.
TYPICAL
1. Oil seal in its housing
2. Awl or pick
Check shaft surface around oil seal friction area
for grooves and replace if necessary (crankcase
disassembly is required).
Apply synthetic grease (P/N 293 550 014) inside
oil seal lips.
Install new seal using an appropriate seal pusher.
92
TYPICAL
1. Oil seal
2. Seal pusher
Preparation for Crankcase Disassembly
Remove the following.
– engine from vehicle. Refer to ENGINE RE-
MOVAL AND INSTALLATION
– electric starter
– cylinder head. Refer to CYLINDER HEAD
– cylinder and piston. Refer to CYLINDER AND
PISTON
– drive and driven pulley. Refer to TRANSMIS-
SION
– magneto flywheel. Refer to MAGNETO AND
STARTER DRIVE.

CRANKCASE DISASSEMBLY

Remove the timing chain locking plate then chain.
Loosen the pivot bolt and remove the chain guide.
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