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Check and
overhaul
of the gear-
box unit parts
GEARBOX
AND COVER
gear box
must nol
show any
cracks.
surfaces coupled
to
crankcase and cover
must not be scored or damaged.
threads
of
bosses must not be
stripped.
SEAL RINGS
Check that seal rings have
not lost
their flexi-
bitity and are
not burred
.
II
necessary
replace
them
.
BALL BEARINGS AND ROLLER BEARINGS
-
bearings must be
in perfect condition and
must
nol
have an
excessive
slack.
-
rolling surfaces
must be even
and
smooth.
-
balls and
rollers must be unimpaired
and
smooth all over.
Should any
Imperfection be detected, bearings
must be replaced
(see
paragraph
..
Bearings
..
on page
80)
.
MAINSHAFT
-
gear teeth must not show excessive wear.
-
contact surfaces of gear
teeth
must
be
very
smooth
,
without chippings or cracks.
LAYSHAFT
Layshaft
must
not show
any pit
or chipping
anywhere and
surfaces
contacting
bushings
must be
perfectly
smooth
.
FITTING CLEARANCE BETWEEN GEAR
BU-
SHINGS AND LAYSHAFT
-
110 of
1st
- 2nd
-
3rd
speed
gear bushing:
27 .040 -
27.061
mm.
(1.064S -
1,0655"
)
0
/
0
of
layshaft bushing
support for the
1
st
,
56
2nd
,
and 3rd speeds:
26.987
-+-
27.000
mm.
(1.0624
7
1.0630"
)
-
bushing - layshaft
fitting
clearance
:
0.040
-
0.074
mm.
(.0016 -
.0029"
)
-
1
10
of top gear floating
bushing:
20.007
-
20.028
mm.
(.7877
-
.7885")
0
/
0
of
layshaft floating bush
suppo
rt
for
the
high
speed
gear:
19.987
+
20.000
mm.
(.7868
7
.7874")
-
bushing - layshaft and
fitting
clearance:
0.007-0.041
mm.
(.0003
-
.0016"
)
LAYSHAFT GEARS
Gears must
not show
any Imperfection
or exces-
sive wear on teeth or frontal
engagement face
teeth
.
Contact surfaces of teeth must
be
perfectly
smooth
,
without any
imperfection.
When
bu-
shings
fitted
In above gears are
too
worn
out,
they
must
be replaced
.
Atter pressing in
,
the new bushings
must
be
reba red to the sizes shown In following
para-
graph
.
FITTING CLEARANCE BETWEEN BUSHINGS
AND GEARS ON LAYSHAFT
-
0
10
of
1st -
2nd
-
3rd speed gear bushings
:
31.060 - 31 .099
mm.
(1.2228
- 1.2243")
-
1
10
of 1 st -
2nd
-
3rd speed
gears:
31 .000 - 31.025
mm
.
(1 .2205
-1.2214"
)
-
gear bushings negative allowance
:
0.035 - 0.099
mm
.
(.0014 -
.0039"
)
-
Ol
D
of 4th gear
floating bush
:
22.960 - 22.939
mm
.
(.9039 - .9031
"
)
-
ti
D
of 4th speed
gear:
23 .021 - 23.000
m.
(.9063
-
.9055")
-
4th speed
gear
- floating
bushing
fitting clea-
rance
:
0.040 - 0.082
mm
.
(.0016 -
.0032"
)
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