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Fig.
9'1.
-
Gearbox
and
epicyciic
reduction
gear
parts.
62
1.
Clutch~ge-arbox
coupling
-
2.
Cover
gasket
-
3.
Primafy
shaft
from
bearing
-
4.
1st
speed
and
4th
speed
gear
~
S.
2nd and
5th,
3rd
and
5th
'~
ff
1
speed
gears
~
6.
Primary
shaft
rear
bearing
-
7.
Reverse
gear
mounted
Q
1
...;._;,;
on
its
shaft
-
B.
Secondary
shaft
bearing
retainer
ring
-
Q.
Secondary
‘“"
‘l
§i:.,_W.;;..,c%-:
__
shat?
front
bearing
-
19.
1st
and
4th
speed
driven
gear
-
1?.
Srd
and
20
J
ir
5;=e?;i;"~:
6th
speed
and
reverse
driven
gear
-
12.
2nd
and
5th
speed
driven
gear
-
13.
Secondary
she'll
rear
bearing
-
14.
Thrust
ring
-15.
Epicyclic
reduc-
e__
lion
fixed
gear
-
16.
Thrust
outer
plate
-
17.
Epicyciic
reduction
driven
®/
gears
-18.
Shim
rings
-19.
Reduction
gear
engagement
sleeve-
20.
Driver.
j
gear
shims
-
21.
Stop
ring
for
pivots
-
22.
Driven
gear
axle
rollers.
i
Note:
Starting
from
chassis
No.
#27935
helical
teeth
have
been
super-
seded
by
straight
teeth.
The
reverse
shaft
should
be
smooth
and
without
scoring;
it
the
permissible
clearance
between
the
hush
titted
on
the
gear
and
its
shaft
is
in
excess
of
the
wear
limits,
replace
both
bush
and
shah.
The
bail
bearings
should
be
perfectly
smooth
in
operation,
without
clatter.
The
epicyclical
reduction
driven
gears
roller
bearings
and
those
for
the
bevel
pinion
shaft
should
have
an
assembly
clearance
not
exceeding
the
value
listed
at
page
63
and
the
surfaces
mating
such
components
should
not
be
damaged
in
any
way.
The
gear
control
forks
should
be
checked
for
deformation
and
hardening
characteristics
of
the
working
surfaces.
They
should
slide
freely
with
shifter
rods
in
the
box
guide
holes.
Replace
gaskets
whenever
worn
or
damaged.
The
epicyclicai
reduction
gear
thrust
rings
should
be
checked
and
it
presenting
signs
of
wear
should
be
replaced.
At
gearbox
major
overhaul,
remove
the
control
lever
sector
plate,
located
under
the
cover
(Fig.
98),
in
order
to
check
its
components
efficiency,
especially
the
ratchet
(3)
and
the
control
lever
dowels
£1},
which
are
subject
to
wear.
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'
Fig.
93.
-
Gear
shift
lever.
Fig.
99.
-
Assembling
of
epicyclic
reducfion
gear
on
gearbox
secondary
shaft.
1.
Control
lever
doweis
-
2.
Sector
plate
fastening
screws
-
6.
Primary
shaft
rear
bearing
-
14.
Shim
_
R
=
Reverse
Bea,-
3.
Gear
selector
pivot
ratchet.
shaft
»
V
=
Shim
pin,
60
l
ll
‘l
e..__
.-R--m...-.-.-R-»-~.-»~..,-.
~.-.,“-..-._.-
i
l
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