BOMBARDIER 1980 Shop Manual page 37

SECTION 03
SUB-SECTION 01, (ENGINE TOLERANCES MEASUREMENT)
CRANKSHAFT END-PLAY
MINIMUM
0.20 mm
(.OOB")
MAXIMUM
0.40 mm
(.01
6")
O
NaTE: Crankshaft end-play
IS
adjusted only when
crankshaft and/or crankcase is replaced.
One cylinder engines (247, 277)
To determine crankshaft end-play. proceed as follows:
a) Measure crankcase. To do this first measure each half
from mating surface to bottom of bearing seat. Add
measurements of both halves then add 0.30 mm
(.012") for gasket displacement. Equal A.
b) Measure the thickness of each ball bearing. Measure
distance between bearing shoulders on crankshaft.
Measure standard shims (247 type: P.T.O. side and
277 type: P.T.O. and MAG. sides).
Add measurements. Total equals B.
·'1-
Measunng
thickness of
ball bearing
(ENGINE TOLERANCES MEASUREMENT). PAGE 4
Measurmg
distance
between
beanng
shoulders
c) Subtract measurement B from measurement A minus
tolerance. Total balance is distance to be shimmed.
Shim(s) must be located between magneto side bear-
Ing and crankshaft blade.
Two cylinder engine
(640)
BEARING
SIMULATOR
NO.
420
B76 160
AVAILABLE
SHIMS
0.15
mm
(.006").
0.2 mm (.OOB"),
0.3 mm (.012")
Crankshaft end-play is adjusted with a shim(s) located
between crankshaft and magneto side bearing. To deter-
mine correct amount of shims, proceed as follows.
Remove magneto side bearing(s) and existing shim(s).
Slide the appropriate bearing simulator and retaining
washers onto the crankshaft.