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ENGINE: CYLINDER BLOCK AND CRANKCASE
33
Coat a surface plate
with
lampblack and check
the areas where grinding
is
necessary to smooth
out surfaces.
Use a surface grinder trying to remove least
possible stock.
Checking Camshaft Bushings and
Seats.
Intermediate and flywheel end bushings of cam-
shaft are installed with a press fit. whereas the
chain end bushing is fitted into place with a clearance.
The chain end bushing is graded into four classes
according to its diameter.
The same applies to the bushing seats on crankcase.
Always make sure that there is enough inter-
ference at intermediate and flywheel end bushings
lest they are apt to revolve
in
their bores
in
operation.
Fig. 36 • Bottom view of crankcase.
U,010
13,981
U,O I 8
U,OOO
!,
V
~
I
I
~
~
;.-
f-
v::
~
V
l0
V
h
@
~
~~"l
~~
f---'
~
I'-
FIg.
:w •
Checking lower face of crankcase.
Fig. 37 - Critical dimensions (metric) of lappels and tappet
seat. on
crankcase.
8 10,100
'6,410
1-..L__
-h1~0~.1-;;1
° iti-li
46.410
c
10.110
10.110
o
10./ 00
10./10
f 10./10
50.710
3I. 911
31.911
Fig. 3S • Critical dimensions (metric) of camshaft bushing seats.
Timing end bushing
se~tins
bore Is graded Into four classes.
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