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Triumph Trident T160 - B36 REMOVING AND REPLACING THE TACHOMETER DRIVE

Triumph Trident T160
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B
ENGINE
SECTION
836
REMOVING
AND
REPLACING
THE
TACHOMETER
DRIVE
The
tachometer
gearbox (which
transmits
the
drive
to
the
instrument
through
90')
Is
mounted
on
the
left
side
crankcase. The gears
are
driven by
the
exhaust
camshaft, a tongue on
the
driving
gear
locating
In
a
slot
at
the
end
of
the
camshaft.
To
dismantle,
first disconnect
the
cable
drive
above
the
gearbox.
Note
that
this cable has a
tongued
end
which
registers
in
the
slotted
end
of
the
driven
gear.
Remove
the
end cap A (Fig.
B43)
with
Its sealing
ring, and
extract
the
driving
gear
with
the
aid
of
a
pair
of
thin-nosed pliers.
(J
\
c
Fig,
43.
Tachometer
order
of
assembly
Now
remove
the
end cap B
together
with
Its seal,
and
withdraw
the
driven gear.
If
the
main body
Is
to
be
removed,
Insert
a
thln-
walled 7/16
In.
A/F
tubular
wrench
through
the
driving
gear
aperture
and
unscrew
the
securing
sleeve.
This
has
a
left
hand
thread
and
unscrews
/
838
by
turning
clockwise. The all seal C
between
the
gearbox
and
the
crankcase will also be released.
Checkall
the
seals fordamage, renewing
as
necessary.
Wash
all
parts
thorough
Iy
In
kerosene
(paraffin) and
examine the gear teeth
for
excessive wear,
and
the
tongue
or
slot
on
the
gear shafts for damage.
The
bush'es
In
the
securing
sleeve
should be checked
for
wear
In
accordance with
the
dimensions given
on
pageGD3.
If
they
are
to
be
renewed,
note
that
one
bush has a
'head',
and
hence
the
bushes must be
driven
out
from
the
oppOSite end. A
shouldered
drift
Is
advisable
for re-assembly.
The
driven
gear
(I.e. the
one
attached
to
the
cable)
runs
direct
In
the
gearbox body.
Wear,
Indicated
by
an
excessive amount
of
sideways movement,
can
be
rectified only by renewal
of
either,
or
both,
components.
When
re-assembling, place
the
oil seal
In
position
between
the
gearbox
and
the crankcase. and
tighten
the
securing sleeve
(remember
that
It has
a
left
hand
thread),
at
the
same
time
aligning
the
driven
gear
shaft
with
the
cable. Insert
the
driving
gear
and
make
sure
that
Its
tongued
end
Is
properly
engaged
with
the
slot
In
the
camshaft.
Replace
the
end-cap and oil seal.
The
driven
gear,
with
Its
end-cap
and seal
Is
replaced
next.
Note
that
Its
shaft
will
be
seen to
rotate
slightly as
the
two
gears
engage.
When
connecting
the
cable, make
sure
that
Its
tongue
Is
properly
located
In
the
driven
gear
shaft
before
tightening
Its securing nUt.
Both
gears
and
the
Interior
of
the
gearbox
housing
should
be
liberally coated with
grease
before
assembly. Recommended lubricants
are
~Iven
on
page
AS.
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