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all the oilways. Che:ck that the orifice nozz le
in
the
channe
l
between
the re
lief
and operaNng
va lves is
dean. If it is not possib
le
to b
low
the nozzle
dean
,
it can
be
cl
ea ned
with
a
pointe
d
wooden stick or
s uchlike
. Hard
obi,
e
cts
must not
be
used
since
this
can a lter the graduation.
Check a lso that the groove
in sid
e the
,rin
g gear on
the output sh af
t is
properly
aleaned. Dirt co llects
here
due
to the
centrifuga
l
force. After
deaning,
check a
ll
the parts carefu
ll
y for wear, cracks or other
damag·
e .
Pay particu:lar attenNon to
the following:
Check the so
leno,
i d with the help of a
12
vo lt batte'ry
and an ammeter. C'U'rrent consumption shou:ld he
about 2 amperes. Check the movement
'
o f the valve
during
e
ngagement ·and ,direngagement.
Che,ck to makesur'e that the f ilrters are not damaged
.
Also check the
pi,
s ton
s
of the hydrau lic syst,em for
abras
ion
an,d wear. Check the v'a lves for we
ar.
Make
sure
that all the springs are nol!" damaged. Check all
the g'ears and baH bearings for crncks and
wenr.
Make sure that the bush on
t,he
sunwhe'e
l
is
not
worn.
With :replacement, change the
sunwheell
comp lete
w ith bush. The bush must be 'concentnic
with the
gear
whee
l,
and this is ,d ifficu lt
to bring about
oUl
t side
a
workshop.
Check
the
hra ke
ring
for abrasion,
era
eks or wear.
Check
to make
s ure
that the
linings
on the
clutch
s
liding member
,
a re
not bumt or worn
.
ASSEMBLlNG THE OVERDRIVE
Use new
gaskets,
O-rings, lock washer and seals when
assembling.
Obse
rve maX'imum deanliness since the
hY'draulic
system
is sensi'flive to
impuriti1
es.
4:
20
Fig. 4·49.
Fitting the bush, output shaft
1. Drift SYO 2417
YS~~
Fig. 4-50.
Fitting the output sh af t
ASSEMBLlN
G
THE REAR CASIN
G
l.
Push
,
t he bush
on
to the output shaft
with
drift
SYO
2417,
see Fig.
4-49.
Press the
front
hearing
to
the output
shaft
wi,
t h drift SYO
2412.
2. Press the reor bearing on to the rear
aasing
sec-
tion with drift SYO
2412.
3.
Place a wooden block under the
ou,
t put
as
sup-
port.
Fit
the
spe,
e dometer driving gear and spacer.
Press on the rea'r casing with drift SYO
2412,
see
Fig.
4-50.
4.
P'ress in the oil seal with dr:ift SYO
2412.
Fit the
coupling flange, the washer and nut. Tighten the
nut
to
a torque of
11-14
kgm
(80-100
Ib.ft.).
VOLVO
Fig. 4-51.
Assembling the uni-directional clutch, I
24688
l
.
Spring
2.
Cage
3.
Uni-directional clutch hub
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