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170
OPERATION
No.
ID
33 1 - 3
: Overhauling
the gearbox cover
ID
14
6
10
12
PARTICULAR
POINTS.
Adjust
the lateral
clearance of the levers controlling
the selector shafts (mandrel
1793-T;
see P1.56).
Fit the mandrel
(A), the distance pieces, the levers (take care with the positioning)
the circlip. Measure
the clearance of the assembly of parts in the
gearbox cover and use a shim which will give a clearance of 0.15 to 0.25 mm.
Calibrate
the locking lever spring:
length = 52 mm under a load of 29 -
I.5 kg.
Adjust
the levers controlling
the selector shafts.
Engage the gear, bring the threaded sleeve into contact with the shaft, then unscrew l/4 of a turn. Tighten
the locknut.
Important.
- The shaft of the 3rd and 4th speed is adjusted when the cover is fitted on the gearbox.
DISMANTLING
(see
Pl.
46-47).
Remove
the
circlip
(65)
locking
the
locking
lever
(66).
Remove
the
locking
lever.
Remove
the
cup
(67)
and
the
spring
(68)
of
the
locking
lever
(spring
compressor
1792-T,
see
Pl.
57,
fig.
4)
. . . .
Remove
the
circlip
(69)
f rom
the
support
tube
(70).
R emote
the
support
tube
(do
not
lose
the
locking
balls).
Remove
the
ring
seal
(71)
from
the
tube
(70).
Remove
the
screws
(72),
the
springs
(73),
the
balls
(74)
locking
the
fork
shafts.
Remove
the
threaded
sleeves
(75)
and
their
locknuts
(76)
(spanner
MR-3691-80,
see
Pl.
57,
fig.
2)
. . . . . . . . . . . .
Unscrew
the
fork
locking
screws,
disengage
the
fork
shaft,
the
forks,
the
catch
(80),
and
the
locking
plugs
(81)
. . . .
Remove
the
adjusting
shim
(77),
the
distance
pieces
(78)
and
(82),
the
levers
(79,
94
and
95)
from
the
fork
control
Iever
shaft.
Remove
the
sealing
cap
(83).
ASSEMBLY
(see
Pl.
46,
47
and
56).
To
adjust
the
lateral
clearance
of
the
levers
controlling
the
selector
shafts
(mandrels
1793-T,
see
Pl.
56,
fig.
1 and
5):
a)
Fit
the
mandrel
(A)
from
the
right-hand
side
of the
gearbox
cover.
Fit
the
reverse
speed
control
lever
(94)
(see
Pl.
46,
for
position
of the
levers),
fit
a distance
piece
(82),
the
3rd
and
4th
speed
control
lever
(95),
a distance
piece
(82),
the
1st
and
2nd
speed
control
lever
(79),
the
distance
piece
(78)
and
the
circlip
(69)
. . . . . . . . . . . . . . . .
TOOLS
Spring
compressor
1792-T
17-21
mm
box
spanners
Spanner
MR-3691-80
9 mm
spanner
Mandrel
1793-T
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