BOMBARDIER 1980 Shop Manual page 111

When positioning P.T.O. outer bearing on crankshaft. a
gap of 0.5 mm (.020") must be left between bearing
and labyrinth ring to avoid axial forces to the bearing.
@At assembly. apply a light coat of lithium grease on
seal lips.
o
mm
To insure adequate supply to the bearings (magneto side
and P.T.O. side), install oil seals with a gap of a least
0.60 mm (0.25") with bearing.
SECTION 03
SUB-SECTION 02, (ENGINES)
(464 ENGINE TYPE). PAGE 7