front axle SKODA 120 LS 1980 Workshop Manual

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GEARBOX. FINAL
DRIVE
Connection DimensionsTightening
torque Nmt)
Nuts of cosing clomping bolts .
Nut of primory shoft
Plnlon nut .
Nut of pinion
beoring coP
Nut of releose sleeve
bol
Nut of front cover bolt
Nut of speedometer shoft clip bolt
Nut of speedometer drive beoring
bolt
Nut of reverse-geor pin
bolt
Bolt of reverse-geor pin
Bolt of shifter forks
Bolt of cop of lock-boll springs
Silentblock bolt
Bolt of differentiol cose
Bolt of crown geor
Droin ond inspection hole plugs
Switch or bolt of reversing lomps .
REAR AXLE
Connection M8
M 22x1.5
M 24x1.5
M8
M6 M8
M 22x1.5
M 14x1
Dimensions 40-50
14-17
6-8 19-25
7-9
7-9 17 -20
7 -9
14-17
7 -9
30-40 22-25
35-45
20-30
70-80
M6
M6
M8
M8
M6
M6
M10
M8
M 10x1 30-35
7 -9
Tightening torque Nmr)
Rood wheels nuts .
Nut of oxle-shoft boll
Nut of oxle shoft
.ioin;
boit M 12x1.5
M8 M 18x1.5
M8
M10
Dimension 60-70
20-25
17O *)
a
40-50
Bolt of broke
bocking plote
Bolt of wheel cylinder
FRONT AXIE
Connection Tightening
torque Nml)
Nut fostening lower wishbone fulcrum
brocket to bodywork
Nut of lower wishbone fulcrum
brocket
(next to rubber bush -
inner)
Ditto -
outer lock nut .
Nut of upper wishbone fulcrum
brocket
(next to rubber bush -
inner)
Ditto -
outer lock nut .
Nut of upper wishbone pin (connection
with steering
knuckle pivot)
Nut of lower wishbone pin (connection
with steering
knuckle socket)
Nut of wheel
hub beoring .
Nut of steering knuckle pivot
.
Nut of lower
wishbone brocket bolt .
Nut of bolt fostening shock obsorber to its onchor brocket
Nut fostening shock
obsorber to
bodywork
Wheel nuts
Bolt fostening
front oxle to bodywork .
Bolt of
onti-roll bor brocket see
Chopter 6.5, points
24 ond 25
see Chopter 6.5, point
21
M
,M M
M
M
M 12x1.5
12x1.5
12x1.5
12x1.5
12x1.5
12x1.5 6s-70
45-60
70-90
45-60
70-90
70*)
70 *l
40-50 50-55 12-14
60-70
40-45
12-16
M
12x1.5
M10
M 12x1.5
M10
M 12x1.5
M10
M7
*) Further tightening os
required for olignlng holes
for the cotter pin.
22

5.5-5.7
the toe-in of the reor
wheels using olso the
MP 8-152 gouge or onother speciol gouge
ovoil-
oble in your
workshop. To
obtoin the required
shift of the holf-oxles (symmetricol
so os not
to
disturb the oxle olignment), strike ogoin the
holf-oxles with o rubber mollet
os per poro-
groph 2.
4" Retighten the slockened connections
(rodius orm bolts) ond, occording to the pro-
gress of the reossembly, olso the nuts of the
holf-oxle shoft (see
Chopter 5.2, porogroph
5).
Complete the operotion by locking the nuts.
Fig. 5.5/3 -
Checking Alignment of Reor Axle
with Cor Centre Line Using MP 8-158
Gouge 5.6 HALF.AXLE DUST BOOTS
To prevent
oil from leoking through the
ioint
gop between the dust boot ond the joint
guord
os well os ony twisting of the boot during
the oction of the rood spring, or its domoge by
contoct with other cor ports,
it is importont to
observe its correct position
on the holf-oxle. lt
should be locoted
with its
flonges focing
reor-
wqrd ond tilted upword ot on ongle of obout
45o. For better occess, ploce
the clips fostening
the dust boot to the holf-oxle ond cover with
their screws on top. With the right-hond
boot,
screw in the clip screws from the front,
with
the left-hond boot the screw on the holf-oxle
from the reor ond on the cover from the front.
Connect the dust boot flonges with hollow
rivets using suitoble pliers.
lf riveting pliers
ore
not ovoiloble, bolt the flonges togethen instol-
ling odequotely dimensioned ploin
woshers
under the bolt heods ond nuts.
5.7 HALF.AXLE SHAFT
The thrust ring of the beoring (behind
the
shoft toper) is pressed
on the shoft. lf it is ne-
cessory to renew this ring, for exomple ofter
repeoted replocements
of the beoring (see
Chopter 5.1, porogrroph
4), press
it on so
thot
it is removed 76 to 78 mm from the edge
of the
toper behind the shoft
threod.
100

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Fig 6/1 -
Front Axle -
Sectionol View of Holf-oxle ond Steering Knuckle Arnr
102 TI
den
the
rods
TI
poir
wisl S us1
te ler
Prev
6.1
Ato -wl
-wl
At ft
-co
- kir
Fo
ploct
prop(
oll tl
comr
Th
weor
orms
front
tions
exom
stone
ond I
by th
tion t
the s
chonl
costo king
ond i

wi
prl
tht
rer
oul MT
ott
rec
.a
Fig
Dis S
boll
6-1C
rubl
ovo
exomple
50,000 km ond
more, check the wheel
comber ond prepore
suitoble woshers for its
correction. 2. Jock up the cor ond support the body on
both sides to relieve the front wheels, ond
remove the wheels. 3. Proceeding from
inside the luggoge boot,
remove covers protecting
the threods of the
shock-obsorber piston
rods ond screw off the
nuts. Retoin the piston
rod by holding its flot-
tened end.
b) Operotions inside the cor
4. Remove the steering wheel, the steering
column cowling, ond detoch the steering
shoft
from the body -
see Chopter 7.8.
c) Operotions from under the cor
5. Remove the bolt of the connection of the
steering shoftwith the steering box ond releose
the shoft sleeve from the connection by pull-
ing the steering geor
inside the cor.
6. Slocken the nuts of the bottom wishbone
pins fostening the front oxle to the brocket on
the body until the woshers of the brockets ore
releosed. 7. Detoch the onti-roll bor brockets from
the
body ond disconnect the rubber broke hoses
from the front broke systems.
Before discon-
necting the hose, cleon thoroughly the hose
connector ond its surroundings to prevent
foreign motter from getting
into the broke
system. For the some reoson,
wrop the
hose
ends in o cleon rog. Toke
the some precoutions
with the disconnected broke piping.
8. Ploce o roll-o-cor
iock under the oxle ond
remove the bolts (two
on either side
of the tele-
scopic shock obsorber) fostening the oxle to
the body from obove. 9. Compress the telescopic shock obsorbers,
lower the
iock, ond
move it with the oxle from
under the cor.
6.3 REFITTING FRONT AXLE IN
CAR
1. To reinstoll the oxle in
the cor, reverse the
procedure of its removol, i.
e., begin with the
porogroph 9 ond proceed
to the porogroph
1.
Coot the rubber
cup with greose
ot the point
of its contoct with the steering shoft.
2. While reconnecting the broke hoses, ob-
serve the utmost cleonliness ond bleed the front
wheel brokes if no other ports
of the broke
system hos been dismontled. (lf
such o dis-
montling hos token ploce,
bleed the brokes of
oll wheels ofter hoving fully reclosed
the broke
circuit). 3. Turn the wheels in the stroight oheod di-
rection before connecting the steering shoft
with the steering box. Fit the steering wheel tentotively
ond odiust the direction indicotor
switch -
see Chopter 13.17.
4. Using the steering wheel, tunn the wheels
into full lock positions
to moke sure thot the
lock ongle is correctly limited by the king pin
socket stops -
see Chopter 6.5, porogroph
36.
5. Adiust the toe-in -
see Chopter 6.1.
6.4 DISMANTLING
FRONT AXLE
No speciol instructions ore required for
dis-
montling mony of the subossemblies. Accord-
ingly, only the bosic dismontling procedure
will be
deolth with ond porticulors
will be men-
tioned only os fon
os they ore necessory for the
sequence of operotions ond the use of iigs.
Ports which con be dismontled witlrout re-
moving them from the cor ore the wheel hubs
and beorings, the broke mechonisms, steering
orms, shock obsorbers, ond the
onti-roll bor.
lf ony odditionol ports
hove to be dismontled,
remove the oxle from the cor ond dismontle it
on the stond.
Dismontling Wheel Hubs
ond Beorings
1. Dismontle the broke mechonism os per
Chopter 9.1 ond remove
the wheel hub
cop
using the MP 6-124 drog. When using the MP
6-136 pull-off
cortridge, the hub cop hos to be
prised off with o
tyre lever or o similor tool.
Now remove the costelloted nutwith its wosher
ond pull
out the hub,
ossisting the removol
with
light blows of o mollet, if necessory.
2. Toke out the inner port
of the outer beor-
ing, then the seoling ring, ond, f
inolly, the inner
port of the reor beoring (cone
with topered
rollers). Prise out the seoling ring using o
scrrewdriver. Proceed corefully olong the ring
circumference to ovoid distorting the ring which
Fig. 6.4/1 -
Removing Hub Cop Using
MP 6-124 Drog
106

R
tr
el o
tl
Pl
e1
th
35.
Using
o meosuring rod
on which the dis-
tonces con be morked with o line, meosure the
distonce between the gouge plotes
when tunned
forwords ond reorwords (the plotes
must be
opproximotely horizontol). By turning both
steering rods, odiust the rood wheels so
thot tlre
distonce between the plotes
behind the oxle is
3 mm lorger thon the distonce in front
of the
oxle, ond lock the steering rods in
this position
by meons of nuts.
Fig. 6.5/10 -
Meosuring Front Wheel Toe-in
36. Rotote
the steering screw to check the
correctness of the steering geor
reossembly.
With the wheels in the right-hond ond left-
hond lock position
when the steering knuckle
obuts ogoinst the boss on the king pir-r
socket,
both extreme positions
in the steering
box
must be resilient,
without ony hord impocts.
lf this is
not the cose ond there is o hord
impoct, correct the odiustment by shortening
one steering nod ond lengthening
the other one.
37. Hoving odiusted the comber ongle
ond the
toe-in, retighten
o) the nuts of the eccentric pins
ond lock them
with cotter pins
b) the nuts of the upper wishbones ond lock
them with cotter pins
c) the bolts of the upper wishbone brocket
d) the nuts of the upper wishbone pins
ond
lock them by tightening the thin nuts
e) the nuts of the lower wishbones ond lock
them by tightening the thin nuts
f ) the
nuts of the boll
ioint pins (boll pins).
For tightening torques see Chopter 1.8.
38. Recheck the wheel comber, remove the
gouge, ond screw down loosely nuts ond wosh-
ers on to the protruding
ends of the lower
wish-
bone pins
in the following order: thin nut, spring
wosher, two ploin
woshers, onother spring
wosher, ond o thin nut. Fitting
Anti-roll Bor
39. Slip rubber
bushes on the centre port
of
the onti-rroll bor (close
behind the oblique bend)
ond f it on them the holder. After
hoving
threoded the other rubber bushes
on the
ends
of the onti-roll bor, instoll it in the brockets
on
the lower
wishbones, ond lock it in position
by
clomping the rubber bush by onother holder.
Secure the bolt of the holder with o spring
wosher.
Reinstolling Shock Absorbers ond Completing
Front Axle Reossembly
40. Using the spring instoller releose
the rood
spring ond then remove the instoller. Fit the
shock obsorber holder to the shock obsorber
eye ond connect them with o bolt with o costel-
loted nut. Lock the nut
with o cotter pin.
Threod the shock obsorber through the lower
wishbone ond the coil spning ond fosten it
with
bolts ond spring woshers.
41. Fill the wheel hub cop with
the recom-
mended greose
cnd drive it home
in the hub.
The greose will penetrote
into the beoring ond
lubricote it. Use the
MP 6-125 drift to ovoid
domoging the cop.
42. Screw down o greose
nipple on the bot-
tom beoring of both
king pins
ond lubricote the
enti,re oxle with the recommended greose.
Fig. 6.5/11- Driving-on Wheel Hub Cop Using
MP 6-125 Drift
6.6 STEERING KNUCKLE The steering knuckle is o unit formed by the
swivel pin,
the broke bock plote
brocket ond
guord, speciol self-lubricoting bushes, ond the
spocing tube. The right-hond ond left-hond
steering knuckle
con be identified bythe greose
nipple or nipple hole which must foce forwords.
114

5. Turning force
of box and column only. The
maximum permitted
turning force of the box and
column only (drag
link
attached to steering box
but allowed to slide freely
across idler) is 1.2kg
2.5lbs when test is carried out as in (2).
lf the force
is excessive, lubricate
universal joints
and check
thatthe drag link assembly is free to move. Repeat
test. lf still excessive remove
the steering box,
which can be removed
with the track rod still
attached.
TIME ALLOWANCE 5 mins.
6. Turning force to rotate
Steering Box input
shaft. With some form
of coupling (coupling from
'S'
type Steering Box) test the force required to
rotate the shaft; maximum prmitted
torque0.1 6kg
1.16ft lbs.
lf using an arm and spring balance as
shown the maximum force required
can be
calculated bv
160
arm length
in crn
arm length
in inches
These tests should be carried out with the
worm in the central position.
The initial force will
be 0.25 kg %lb greater
than the average pull-
force. lf excessive, remove
input shaft top bearing
cap and adjust the
bearing to give
0.OO to
0.05mm preload.
Shim Part No. 11O-509650
Steel O.3mm
1 10-59O90O Paoer
O.2mm
1 10-590902 Paper
O.7mm
Refit the shims and gaskets
and retaining cap,
fit the rubber sealing ring
dipped in oil and f it the
thin dust cover. lf the dust cover seems strained,
install a paper
gasket
between the cap and dust
cover. Part No. 1 1O-5909O0.
Retest for torque
and check rocker
shaft end
float which should be between
O.4 and O.5mm. lf
excessive and unable to adjust by the adjusting
bolt, replace steering box after contacting
the
Service Department.
Reassemble car and check the maxtmum
permitted force at the
spoke is 2.4kg 4.5lbs.
Check that the wheel
and indicator switch is
ce ntra lised.
Rocker Shaft Nut Torque
100Nm (71
lb ft).
TIME ALLOWANCE
7O mins. (inctudes
cost of additional shims)
7. Other points
which can adversely
affect the
turning force of the
Steering mechanism:
a) excessive tension
of the ball joints.
b) Workshop
Manual 7.5.5. excessive tenston
of the drag link
arms. The force required to
move the arm should be approximately 2kg or e.g.
wrth length
of arm
6 inches
max.
permitted force
equals 1.16 x 12
6
= 2.32lbs
DUST
COVER
4.6lbs when applied to the inboard
end of the
threaded portion.
TIME ALLOWANCE -
Off Vehicte 1O mins.
lf problems
are experienced
with wheel
vibration on the front
axle it is necessary to check
the amount of weight applied to one half of the
wheel rim which should not exceed
50 grams.
You are reminded
that check A1, kingpin
adjustment, is required
to be carried ogt at each of
the six and 12,0OO mile services.
1.16 x12
UST
I
ADJ
UT LENGTH
OF ARM
118 2KG
{4.6lbs)

17.5
FRONT AXLE MP
5-114 Wheel shoft pilot
toper
MP 5-116 Seoling ring drift
MP 5-151 Pinion odiusting gouge
MP 5-152 Wheel
hub puller
MP 6-150 Front oxle ossembly broclket
MP 6-105 Steering orm drift