1980 SKODA 120 LS Workshop Manual

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Fig.4/1-
Georbox, Finol Drive,
ond Clutch
Throwout Mechonism
74

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16. 17
19
q
"b 2A
Technicol
The gec
tegrol uni
Neither of
Since c,
tionolly tc
"georbox "
molly to d
respect i ve
The geo
from the c
reor oxle c
the so-coll
4.1 DtSM
PACK
The pov
tronsm issi,
plete with
Fi9.4.111.
Removql
o) Prelimir 1. Jock r
the reor wl
ond remov Droin th
see Choptt
b) Operoti
2. Prise r
of the reor
cobles ofte
3. Remo,
behind the
bottery. Re
engoge the
lever, loosr
fronr the gr
it from tht
housing to
getting int
pressed on
housing wi
4. Proce
bockrest, fr
detoch the
obsorbers, ,
c) Operotir
5. Remor
connectionr
cooling sys
see choPte
d) Operotic
6. Discol
motor.
4
2
'u., ts
I
Fbb
,w
FINAL DRIVE ASSEMBLY
I
r8
12
ik"-n
TO
13
6
q
76

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5. Prc
scri bed
rods onc
4th spee
fork rod,
irr the b
6. lnsl
guide bu
cover inr heods. S
tob wos
edges of
F it thr
stri ki ng
weoker s
ing forks 7. Tigl
the forks fork rod
the strik
function
Reverse-:
Fig
-1 - Rever
2-1st-o
3-3rd- o
4 -
Rever
8. Inst
press-f ittr
verse-spe
inside th
through t
Turn tl'
end foces
lock it in
hole. Tigl
Pinion Ar
9. Instc
ing ond,
r
_-_-- -
. i\:r,,,
\. 43
Fig. A.1l'l -
Power Pock
1 -
engine with mounting, 2 -
georbox/f inol
drive with
mounting, 3 -
reor oxle (holf-oxles),
4 -
rodius orms
retighten it using the recommended torque
(Chopter 1.8) ond screw down the clinch nut.
lf necessory, top up engine oil, f ill the cooling
system witlr on qntifreeze,
bleed the broke sys-
tem, ond
odiust the hond broke.
For the fosten-
ing of broke hoses (routing)
see Chopter 9.7.
4.2 ASSEMBLING
GEARBOX
Generolly, the reossembly
p'rocedure
depends
on the extent, to wlrich the unit hos been token
oport. For betterunderstonding,
we sholl des-
cribe the procedure
ond peculieorities
of reos-
sembly of o completely
disossembled unit.
Gear Chonge Mechonism
. 1.
Clomp the right-hond holf of the housing
(when viewed from the flonge securing
it to
the engine) in the MP 9-101 stond
com-
plemented with the MP 3-101 georbox
rock, ond
check the housing for completeness.
2. Instoll
circlips on the striking fork rods
of
the reverse
ond 1st ond 2nd speed. The ring
with the lower
nose is to be fitted
on the 1st--
ond 2nd-speed rods.
3. lnsert the reverse speed
striking fork rod
into the housing
so thot the inserted
end pro-
trudes slightly from its guide,
slip on it the
striking fork with the longer
side of its heod
first,- ond push
the striking fork rod through
the fork
ond the end of the guide
os for os=it
will go. 4. Fit tlre
MP 3-109 jig
into the free holes for
striking fork rods (both pins
of the
iig), ond
proceeding through the hole in its side ond
using o stick or o length of wire, push
the lock
pin into the housing
os for os it will go.
Proceed
in the some monner for
inserting the next pin
(use one pirr
of the
iig). Shift
it
iust so thot
the centre lrole remoins free for inserting
the
striking rod.
Puslr the lock pin
into the end
guide of the strikirrg
fork rods olso os for os it
will go. The
iig is not required
for
the instol-
lqtion of this pin.
Fig.4.2l1- Clomping Georbox Housing in Stond
Using MP 3-101 Rock
Fig.4.212 -
Locking Striking Fork Rods in
Position bv Meons of Lock
Pins ond Bolls
78 Fig.4.2l3
-
Instolling Lock Pins Using
MP 3-109 Jig

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Proceed
in the some woy with the
3rd- ond
4th-speed geors.
lf the morked position
of the neutrol is not
midwoy between the side morks (check
visu-
olly), remove the pinion,
mork the positions
of
the striking forks on
their rods (preferobly
on
either side), slocken the forks ond 'rnove
them
toword the required centre by
the distonce of
the deviotion of the neutrol morking. Then lock
the striking forks in position
with screws.
For the striking fork tightening torgue see
Chopter 1.8. 13. Adiust the reverse geor position
so thot
there is o gop
of obout 2
mm between its teeth
ond the odioining teeth, ond swing the striking
fork of the first ond second speed
to moke sure
thot it connot foul
the teeth.
14. Reinstoll the pinion
with its respective
woshers ond lock it in position.
Shift the strik-
ing fork rods to moke sure thot, for exomple,
o movement opposite to the required one of the
striking forks did not toke ploce,
i. e. thot the
neutrol is midwoy betvr'een the engogement
positions of the synchronizing clutches. Correct
ony error ond remove
ogoin the pinion.
Fitting Drive Geors ond Clutch Shqft
15. lnstoll the ossembled drive shoft into the
housing ond slip the splined bush on it.
Top home the seol ring with its seoling lip
pointing outwords into the guide
of the clutch
thrrowout sleeve, ond smeor it with oil. Then
threod the clutch shoft through the ring to
instoll it into the splined bush ond put
it into
the housing together with the guide provided
with o cooting of seoling compound on its cyl-
indricol bedding surfoce. Secure both the shoft
ond the sleeve with circlips.
lnstoll the sleeve guide
with its droin hole
level with the porting plone
of the housing ond
focing the pinion.
For the speciol seoling compound see the
note in Chopter 10.1.
16. Put the pinion
with geors
into the housing
ond oil oll synchronizing rings. Fit the MP 5-104
iig for
setting the crown wheel bocklosh into
the bore of the differentiol beoning ond the
fitted cover, fit the ossembled differentiol in it,
ond close the housing with the other housing
holf ofter hoving cooted the seoling surfoces
with o seoling compound.
Fit o rubber ring in the recess of the boss
beside the stud
bolt ond put
o spring wosher
under the nut. Tighten the remoining nuts
without ony woshers (the
stress of the bolts
ofter the tightening of the nuts provides
for'
their suff icient securing). Tighten the nuts
moderotely for the time being.
For the speciol seoling
compound refer to the
note in Chooter 10.'1. 17.
Proceeding through
the bore of the differ-
entiol beoring in the upper holf of the housing,
fit another
iig, the MP
5-104,
on to the differen-
tiol with flonges clomped so os to fit
into the
topered roller beoring cover, locote the cover
pocking, ond fosten
the cover by meons
of three
nuts. lf the clomping or drowing close of the
flonges of this jig
proves inodequote, it is
necessory to drow close the flonges olso of
the
first, previously
inserted
iig.
18. Drive the guide
of the clutch throwout
sleeve into the housing using the MP 3-103 drift,
top home the drive shoft, ond insert
two od-
iusting woshers under the collor of the
pinion
shoft boll beoring on both holves of the housing
ofter hoving determined their thickness by
meosuring. Using o wire needle
inserted into
the holes of
the tobs of the woshers orronge the woshers so
thot they do not overlop the porting plone
of
the housing,
then instoll the cover ond spring
woshers, ond tighten the nuts (seeChopter
1.8).
19. Fosten the housing by tightening the nuts
(see Chopter 1.8) ond lock in position
the guide
of the clutch throwout sleeve with the respect-
ive clip using the spring wosher under the
clip
nuts.
4.3 ASSEMBLING
FINAL DRIVE
Ref itting Differentiol 20. Turn the housing into the horizontol pos-
ition. Rotote the ends of the knurled hondles
of the inserted iigs MP 5-104
to move the re-
instolled differentiol (see previous porogrophs
16 ond 17) until the crown wheel withdrows
Fig. 4.311- Adiusting
1 -
MP 5-104 iig,
3 -
MP 5-106
iig,Bevel
Geor Bocklosh
2 -
MP 5-101
iig,
4 -
Screwdriver from
the
Determir
swivellin
To rotr
iig with
tiol stor
21. Ins
on the b,
rotote th
the diol
ible to th
Retoin
ogoinst 1
cover. Tl'
teeth chc
losh on t
of the ho
wheel sic
fied volut
the hond
fully its c
( preferob
wheel). I
opened f1
respectivr
of the
iigr
Now tl"
iusted on
flonges o'
topered r
This situc
trot i o n.
Fig. a3fi
for tc
1
22. Rem
side (turn
withdrow
dimension hos to be
roller beori
Measuring 23. Unscr
the toperer
locote it o
q,
ry
80