Gravely 424 - Page 49

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15.
:6,
L7.
18.
Figvre
59
Figure 60
4. Scoring
on the
back of
gears.
5.
Chipped
teeth.
6. Heavy
wear
on
gear
teeth.
Examine
tle internal
surfaces
of the
worrn
gear.
An
even
!\re:rr
pirttern
is
normal, lou'ever
it should
not ex'
ceed
.0I0
inehes. If the
gear
is
pitted in spots
or has small
gouges, polish tl:ese
areas.
Reassemble
the
difierential
mechanism.
Use
::ew needle
thrust
bearings if
thrust
washers ot
gears
have been
replaced. Assemble in this sequence
on
ell
four spider
arms: spider
gear,
shifting
train
pinion,
needle thrust
bearing, needle thrust race,
shims,
spider
thrust
washer,
Install
in
bronzre
gear.
Earlier
production
tractors
had
shifting
train
pinions
on two
spider
arms and two
thick
thrust
washers on
tle arms with
only
spider
geats.
These should
be
converted
to the stvle
described
above and
illustrated
in
6gure 59.
Adiust shimming
using
a differential
gear. The
gear
shorrld
be solid on
all four spider
gears. If the differential
gear
wobbles,
decrease
shimming
on
gear!
which
gear is sitting solid
on. This
allows
these
geirrs
to move
rway
from
center
and in efiect
Iowers
&em.
Reirstall
clutch housing
and
slrims
back
on
$,orm
gear.
Install
bolts
using
new locking
plates. Torque
tc
20
ft. lbs.
Check end
play
of shifting
gear.
0-.010
inch maximum.
Remove
clutch
plate and adjust
shims
accordingly
if
necessary.
Reinstall
bolts.
Torque
to 20 ft.
lbs, Secure
locking
plates
to bolts.
Bend dou'n locking
plates
and
remove
bolts securing
clutch
housilg
to
worm
gear'
Lift
oft
clutch
l'lousing
*,ith axle.
Remove
shims.
Turn difierential
over and
bend
down
locking
tabs
and remove bolts
securing
pinned housing to
worm
gear'
Lift
off
pinaed housing
u'ith axle.
Remove
internal
parts
of
difierential,
carefllly
check
all
parts for
damage
or abnormal
wear.
Abnormll
wear
ilcludes:
l. Scoring
of spider
pin
arms.
2. Scoring
of bore
of
gears.
20.
21.
oo
oe
u.
c8