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127
128
A
129
72
If
necessary
remove
:
•
casing
studs «AD»;
•
oil
drain plug and washer "AF
.. ;
•
oil
filler and level cap with
washer
..
AG,,;
•
oil vent plug with washer
"AH».
e
Inspection
•
Ensure
the braking
disc is
fre
e
from seorings and
is not
excessively
worn. If the scoring
is
deep, re-
p lace the
disc. See
section "brake d isc», para 16.9.
•
Ensure
the hot1ow shaH juts
o
n whiCh
the
cush
driv~
works is not
excessively
worn,
also
that
the
surfaces
contacted by the
sea
l ring
(S).
bearing in
cover
"
G ...
inner
race o
f
bearing
on
housing
"
AA
..
and the
circlip groove
on the
hollow
sha
ll
..
L
",
are
in
good
s lale.
Replace as
necessary.
•
Ensure rubber
seal
.. AB,.
has
not
lost
its
elasti
·
city.
If
crumbled
replace.
•
Check for wear
or chippings of
the
crOwn
wheel
teeth
«Q»
and if necessary
rep lace
the
comple te
bevel set_
•
Ensure the union
faces are
dead smooth
and
nol
heavily scored
or nicked
If
on
ly
lightly
scored
smooth out the surfac
e
uSing
very
line
emery paper.
f
Pi nion"wheel coupling
clearance
(bevel
set)
Pinion-crown
wheel
clearance is
adjusted
as follows:
•
Using 2 nuts
«A ..
and
washers, provisiona lly
fit
up
the complete pinion
housing on
the
casing
(fig.
131).
•
Set
up
tool
199288 00 on the
crown
wheel
(5
In
fig. 130).
•
Insert
Ihe
tool
in lo Ihe cage o
f
the
bearing
in
Ihe
casing.
•
Check pinion-CfQwn
alignment
(
.. A»
in
fig.
129
and
arrow ..
0
"
in
fig. 131).
•
If offset, place
suitable
shims between
pinion
and
taper
bearing
. It
is also necessary
to
check.
the
con-
tac
t
area of the pinion·crown wheel teelh
proceeding
as follows:
1
Smear
the pinion
teeth
with
a su itable
coloured
compound
such as
eng ineer
blu
e
:
2
provisionally fit
up
the
crown wheel-hollow
shaft
assembly
and the cover on
the
casing:
3
Set
up a
universal type puller
on the hollow shaft
to keep
Ihe
crown
wheel
Ilghtly pressed at
Ihe brake
disc
side using
suitable cen
tre
spacers;
4
Rotate pinion
..
6
..
in its normal running direction
keeping a fast
hold on crown
wheel
Ole
..
so that
ro-
lalion
occu
rs
under a certain load, thus leaving
a
distinct
contact mark
on
the
pinion teeth
:
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