Lotus TURBO ESPRIT Service Manual page 598

Page 6
Q B 3
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CLUTCH ASSEMBLY
The gearbox o r engine/gearbox assembly must f i r s t be removed
from t h e v e h i c l e b e f o r e a c c e s s t o t h e c l u t c h c e n t r e p l a t e o r
s p r i n g / p r e s s u r e p l a t e may be o b t a i n e d .
I f t h e gearbox assembly
i s
t o be removed from a Turbo model, i t may be found e a s i e r i f
t h e t u r b o c h a r g e r i s f i r s t removed.
B e f o r e re-assembly, e n s u r e t h a t t h e s p i g o t b e a r i n g and
N y l a t r o n t h r u s t washers a r e c o r r e c t l y f i t t e d ( s e e Q B 5 ) ,
and t h a t a s m a l l q u a n t i t y of molybdenum d i s u l p h i d e l i t h i u m
b a s e g r e a s e (NLG1 No. 2) i s a p p l i e d t o t h e c l u t c h s p l i n e s .
Torque t h e c l u t c h assembly t o flywheel b o l t s t o 2.3
-
2.6
kg f.m (17
-
1 9 l b f f t ) .
Note t h a t i f t h e c l u t c h housing i s t o be r e p l a c e d , t h e
gearbox c a s i n g must be r e t u r n e d t o t h e f a c t o r y f o r mating
and machining.
A revised c l u t c h cover (pressure p l a t e assembly) has been f i t t e d t o a l l E s p r i t
Turbo models from engine number
22728.
This new cover has a diaphragm spring with curved fingers, instead of s t r a i g h t as
used previously. This n e c e s s i t a t e s a corresponding change to the r e l e a s e bearing
assembly from a curved t h r u s t face to a f l a t face.
I t i s nos t important t h a t 'old' and 'new' specification components a r e not mixed
on the same vehicle although l a t e r type covers and r e l e a s e bearings may be used
a s a p a i r on any c a r .
QB.4
-
RELEASE BEARING
S e v e r a l d i f f e r e n t t y p e s of r e l e a s e b e a r i n g have been u s e d , and g r e a t c a r e
must be t a k e n t o e n s u r e t h e c o r r e c t f i t m e n t .
Summary
-
S e r i e s 3: P r i o r t o t h e i n t r o d u c t i o n of t h e C35 t y p e gearbox ( l a t e 1983)
S e r i e s 3 c a r s w e r e f i t t e d w i t h a c a s t i r o n r e l e a s e b e a r i n g c a r r i e r , whereas C35
equipped c a r s u s e a f a b r i c a t e d c a r r i e r . Both t y p e s use a f l a t f a c e a d a p t o r p r o f i l e .
Turbo: A l l Turbo models u s e t h e f a b r i c a t e d t y p e r e l e a s e b e a r i n g c a r r i e r ,
b u t w i t h two t y p e s of a d a p t o r p r o f i l e . P r i o r t o Eng. No. 22728, a curved p r o f i l e
w a s used ( f o r s t r a i g h t diaphragm f i n g e r s ) w h i l s t l a t e r c a r s u s e a f l a t p r o f i l e
( f o r curved f i n g e r s ) . E a r l i e r c a r s may however be f i t t e d w i t h t h e l a t e r c l u t c h
c o v e r and r e l e a s e b e a r i n g a s a p a i r . See P a r t s L i s t f o r d e t a i l s .
On r e a s s e m b l y , l u b r i c a t e t h e o u t e r s u r f a c e of t h e r e l e a s e
. .
b e a r i n g ' c a r r i e r With molybdenum d i s u l p k i d e ' , l i t h i u m b a s e
g r e a s e ( N L G ~ N o . 2 ) and a p p l y a l s o t o t h e c o n t a ~ t p o i n t s of
release arm a n d c a l ' r i e r , r e l e a s e arm p i v o t , r e l e a s e arm
a d j u s t e r t o pushrod, and s p a r i n g l y t o t h e f r o n t f a c e of t h e
: r e l e a s e b e a r i n g .
it
t h e b e a r i n g c a r r i e r i n t o t h e guide t u b e and c l i p t o t h e
r e l e a s e arm.