T W O . P E DA L T RA NS M I S SION
T H E S E LEC TIV E A U TOMA TIC
TWO . PED AL
TR AN SM I SSI O N
ansailnble on
AUSTIN A.5O CAMBRIDGE MORRIS OXFORD SERIES III M.G. MAGNETTE WOLSELEY r5ls0 Ms3?/65M/l056
A logieal
deoelopmetat
by the
TH E S E LE C TIV E A U TOMA TIC
fore-
most eluteh engineers in, this eoarrtrlt The Lockheed Organisution of Leamington
Spa, which also includcs
Borg & Bcch Company Lu|., the largest manufacturers offricti.on chltclrcs for the Motor Induslry, lras spenl more than 24 years in the concentratred dnelopment offriction clutches. Our engineers can claim to hatc discusseal the problems arising in poter
trrantsmissionnitlt eucrl manufacntrer in
TW()- PEDATMOTORIlTG With the Mannmatic
Transmissiou System, therc is no clutch pedal
and the clutch is always automatically
the Britislr automobile intlustry. Manumatic Pcdal"
From this bachgrountl of experience thc
transmission sastâ‚Źrn ias bcen da;elopcrl to produce a " Tu;o-
system oJ motoring rr'lrich is os ncar perfcuiort
as nndern
disengagerl when the engine is Once a gear has been selected, acceleraling the engine causes the Manutnatic clutch automatically to take up the drive. This provides a smooth take-up when starting from rest without:rny other action on idling.
the paft o{ the driver.
enginaeri.ng can athi er e.
In selecting a gear the Manumatic clutch is automalically
disengageil of rhe gear selectol and re-engageil on completion; in the meanwhile, the cngine speed is .rutomatically controlled, during the noyctnent
whethet the accelerator. perlal is rleprcssed or released. The only occasion when it is arlvisable to pu1 the gear selector into neutral is when starting the engine, The gear selector krrol, contairrs a spring-loaded swil_ch wLich energises the Manumatic Control Unit. Immeiliahly the knob is graspcil, the clutch is disengagerl:rnd the tlrrolrle is closerl, whilst on releasins it the dlive is restored. It is inrportar.t
tllercforc
that the gear selector
hnob should not
be touchcd ?x?apt blten <hanging gear. Unrler: conrlitions of trlmc congestion, dernanrling relreateal starting anrl stopping, a suitable gear c1rnbe selected, following which the selector lever can be left alonc whilst the vehicle is ilriven by :rlternate use ofthe
DIVISION
[rake :rnd rcoelerator.
AUTOMOTTVEPRODUCTS COMPANY LTD. (A
SuLsidi!.y
ot
ProdDcis
Associated
^rronrotivc
LEAMINGTON SPA, VARWICKSHIRE, Phoaa : Ledminglon
Spa 2700.
Gtams:
" Autoilucts",
Lrd.)
ENGLAND phone Lcamingtoa
Spa
Lontlon Ofiiceand Export Salas:
BROCK HOUSE,LANGIIAM STRDET,LONDON,W.1. Phone : LanEInm 2527
avoided.
Starting from rest in top or thirrl gear is to be
'THE GT]AIT SELECTORSWTEH
'I'hc operariol ol thr: r-rrritsis cortrollo{l lrv tlo thc GEAR SELECTOR SVITCH"
srrirehcs. Orrr,. Lrrorrr rrs
is irrr:orporatr:rlin thc gcar sc|.r.lol lrrrl
sets the rnrr)harisrn iD motiorr as sootr as thr: knob is glaspcrl. 1l'lrr,L,arl
TI'II)ItAT]LIC TLUID RnsIi|tIOtTt
nc{rossaryto rnole the gear solcctor is sulficieut to operatc thc s$il(.1, 1 ' llll [{A N U }L{TIC
\rithout
coNl lio|- uNrI ,I'HI.]
anl. irrdr:pondcnt action on the palt of thc drir.r:r.
tr:r'rned the SYNCIIRONISER
CLUICII SEIIVO
SWITCH. is built
iuto
Thr: othr.r,
thc clutch and
rnalies contact $hen the engilc slecd is irrcorrcct. lihc signals frorn thr:sr: tro s.ttitchr:-. arr: tt.anslritted to rhe Corrtrol t]nit r.lrich,
- ..:
lrv rlc:urs of threc vacrrurr
|{1
sc1vo ur ts, arrtorrraticallv $ i t h d r a $ s th I
,:,ft'.1 i,
ch r te h .
Lalics {)\'cl rurrrtlol of tht: tll()ttlc
drrring
a
gcar
<:hangc and i)r'lr\t!rts Ir! cDgagcrn(:ntol tlrc r:hrtch aft{)r thc gcnr'chalgr' unLil thc cngirrcs1r:r'rlis collect.
t:,,,,,'
'l'ht
tlo
vaurrrrrrr scr.vos
lbr closirg arrrlolrcning tlrr: 'fllr.t ilL\\UIIITIC (ILU'ICII IIYI)IIATILIC SLAVE CYLINDER IOII IJI,IJT( TI T}PDMTION
t h r ( ) t l.l ( f {r c
$iLhir th'r colltrol uoit and tht
,ig.
l.
l
t,ytrictl irstallot;on
o.l tlt. llanwtnti.
lrurrniss;,,,
st:nm
nith ltvlraulic
clubh lilna..
co r r L a i r r cd
,')
third rrhicI opcr.ates
t h e c lr rtIh
i s:r
se p a r a tc
unit lir{)\!r as the Olrrtch
HOW THE
Sr:rvo,
SYSTEM WORI(S A typir:al r\lanurnatic tralsmis-qion svstom layout is shor.n in figulr: l.
-lhc vacrrrrrrr is lr.ovidr:rl Ly thc r:rrgirrl irrrhrction rnallifold ar(l :t s|paf{te
'fhis consists of forrr l)rincil)al urits rrarrr{lv, th<:CLLITCH, thr: CONTIIOL UN l'll. th,: CI-UTCII SERYO and thc SLr\VE CYl,lN t)ER, rLhich ar{)
rcset',oir crrsrrr-r's a rr'scrvl
illu stra tr:d irr fig ur es 2, 3, 4
-.uPI)lv at all tirr|:-..
and 5.
i ig. 2. 1 ghon.d nnl lismanttut oJ !, \Iniunnti. Clut.l. ant dtit:t\
t,itn, nt.,.
MAI(E THE MOST OF TWO.PEDAL MOTORING.. . If you arc used to a car fitted u.ith a clutch pcdal, drivc ir vour nornral manrcr, but fbrgct abolt Lhr: cluteh, ancl do irot touch rhr: gcar seleetor: Lrrol' ,.r, ,.t,1 r h, r , , r ing a g, . ar ' o1, 1. slantrxc nnctxo Ensurc that thr: handLralce is orr and thar rhc gear sel{){)t{)rilt in neutral ; thcl stat thc cngirr) in the orrnal rnanncr. Tihis is thr: onlv occasion whcu rr lrrtlai rrlr.d lre r r . , . d. Z.
MOV IN G
OF F
-\llow the enginc to idk'. sclect first. sr:r:orrd or revers{) gcar accor{liog Lrl rclFirelncuts: rel(iase the handbrakc and deprcss thc accelerator. Moving o{I up a gradierrt is facilitated Ly gcntlv depressing the accelcralor befbre rcleasing thc harrdbrahe. Thc car may tcnd to crccp v,hr:rr in gear lvith thc carl)rur)ttor. chokc irr ul'crali(xr. causingth, engin, to idlc fast, This tr:ndcncy should be r:rrutrolleil I'r of th,, l,r,rl... 'rsc 3. ,uro"rrroa aurn
il I ItiS. 4. A s<:ti.ottt nt-oroy tid{ oI \t iutch situ.
*' :::;i i: ":, :", :;":i;i,,,;;::' 5. colsrrxc Even r-hen a gcar is cngagcd the car can coast a\rav frtrnr rest or fi,orr a vcrv low speed down a gradienr. Vhen rhis happr:ns the gear selecror kloL shouli be altcrnatcly graspcd and rcleased t,' sr nclrruris=ethc r.rrgine spr.cd and engagc the clutch, 6c./bre tlepressing thc artplctolor petlal- 7. or.oid u.,,,rspeedingtlre r:lginc, partiorlarlv whcn a low gr:aris cigagcd, this procedure mu6t bc caDicd olt bcforc too high a spoed has Lcen arlainorl.
To sclect gcar, thc al,l)ropriarc rnovemcnt of thc el(:ar sr:l:r:tor is all that is required. Thr: lcver should be graspcd by tlrc knob ancl should lrc roleased directly following tho change. Unleis thr: knoh is rr:lcascd, thr: clutch rvill not engage and the throttle 1{'ill rrot respond to movcmclrl ol lhc accelerator ptdal. The position of thc acccl{)rator dul'ing the charg(. is rot irnportant sircc. at Fuchtirxcs. the .ngine specd is controlhd lry tho Nhrrumadc avstcm, l'rt thp ctutch sill rc-cngig, rnore rapidly if rhc acccl,r'ator is deprcsscd.
Routine Maintenance
4. sropprrqc The ear is Lr,,ught to rest sirnplv hv applying rhr: lrrakcs. llihc cnginc will not stall a rrr.l.1 'r'ovitlir r g a s uit alr l, i g. "i i. r , - "a.r lr r .r a r s i l l r n , , r , l o l T a q a i n a . soon as tlt{) accelcrator is deprcsscd.", . t ",
EVER Y I , l X X l _MI L I S : (d ) (l l ' c (k f l u i d l . v e l j n s u p p t y l a n k a n d rc p l e n i s h , i f n e c e s s a ry " t o w i thnr o D e i n . h (' l t h c t o t , rl i rh g e n ri re I -o c t h c e d b r. k e [ u i d . _ { ; , , n s i d e ra b t e f a i , i t h c flrlid lcvel ii(]n.atcs cxr.crnrl leakag. $,hi(h nusl lr k,catcd anrt rectified immcdirt.ety.
I
I
( l ) T ,ul rri c a t c t h r: 1 ri v , t 1 x )i n t b rL * c c n t h e r[ i o $ -o u t ] e v e r a n t t r. h o s t a v e c l , l i rt c . p x s h r. d w ; t h l m c di u rn g ra rl c o i l 1 , , s a i e : t ra rd a g a i n s t p o s s i b l e s e i z rrc . BELL I.]OUSING i l VLR Y 5 . 0 0 0 [ rl l -l , ] S : (d ) h rl l b rd ( rh c rrrt rb e r b o o r. od the s l a v r , l -l i i , l , : f [ r] rl e a n rh e i n t e o r o t t h e c v t i n rt e r r y i th a b n , s l , , l i I r! ! l i n . l e rd L o c t h c e d f l u j d . O n n o ac c ouDr s l , (n rl i l rrri n c ra l o i l l , e u s c d . Th e n t rr. k t h c c y l i r l .r { i rh l n ! l { l rc c (l I t , , l n } c rh b . g re a s e . a n (t rp t a c c ( 1,) h a s b c n c o v e rc d , i t ma y b e f o rn rl - 4.l t d rl , i s , ri l u s r Lhat thc c n g i | c s t )r! ! l , r' , t , , i rd L o D b v e o { l h a s ri s e n - L h ; 5 bei ng d u c t . t h c s rrra l l rn rn u n r. o l rv e a r } h i c h ] ra s ra k e n 1 ' , , . e s ro r t h e o r; g i n a l tl l nc e al . t h r, l ri rrn t ' h l c l r(i rg s . s etl i ng. s l . . k (r, , )f l l l ! , L t k , , , , t . s L o Mn ; n t ; c o re 6 . s d e $ thc ai l i , , s l i n g n , , t l l a l l r-t , , n r ro rt rr. / s t h e s l a v e c y h rd c r and r ed g h rc n l L . l o . l , D , , l . I f l h c { , , g i rr. s t , e e i t i s s t i l l c x c es s i v c . . n rf ) , ), rt { i , f l h n ri l . i , rs rrre n rs , , t rt j l t h c d e s i re d
l";9. 3-
'l'he ManuhtuIic
conrrol urit
as it appcdrs on *e cdr dnd pith tlle co\r
rrttotl\].
T HE S E L E C T I V E A U T OM AT IC
Aâ&#x201A;ŹG.D
IRAOE
MARK
. . . HAS ALL TIIE ADVAI{TACES IS AN INEXPENSIVE
,+lAtlJfJilfiig
pRoMorls
lnantnalil ilistraction
from complicated
gears, and no fumbling
clutch
SAFE DRIVING becausethere is no and accelerator
moyements
or crasherl
economy of proiluction conventional
of layout,
and is used with
the
synchromesh gearbox,
pauses in emergencies.
lhtah-tune-Li1 lAeanlnaZi-C
anrl simplicity
as it is tlesigned for
ITEM
rMpRovEs PERFoRMANCEfor there is no detay
getting ofr the mark and no risk of missing the gears,
Every gear change
DRIVER
Pr,EAsuRETo rHE ExPERT crvEs TNcREASDD
since it eliminates the tedium o{ de-elutching
anil engaging nettral
in traffc jams, and tedrrces f*tigue on long journeys.
is as goorl as an expert can do and you can select the gear you want when you want it.
Wa-m.ot wa-ti+
oF TRANsMIssroN cIvES ADDEDSMOOTHNESS
as clutch engagement is tlways just right, the engine cannot be over:'rewed.
ttea.t JtfiLa-tA
MAKEsDRrvrNc rJAsrERFoR THE BEcTNNER
as starting,
gear and stopping
nothing
changing
become
chill's
plav-there
is
to learn.
l+t-agzm-atic
cIvES INcREASED EcoNoMy becauseit is im-
possible to over-rey the engine when starting
from
rest and changing
gear,
nor ar.e thele any losses such as occul with the fluid rlrive of fully automatic systems,
tnaz-unatJ* BATTERY
DoEsNor pr-tcE A HEAvy DRAINoN TrrE
since current
is only required rvhile actually
the demanil is small compared with the other electrical
ttta-nztna.,tJ*
selecting gearo anil services.
rNvolvEs No HEAvy MATNTENANcE cos'l's as
it is of rugged construction
designed for long life anil reliability,
an
the spring ccntre driven plate ilamps out transmission
Yibrations.