(

•

•

- I -

SEC T ION 6

FRO N T SUS P K N S ION

CONTE:NTS

Description General •.• Teles copic sbock absorbers •• .

General Data .. Mnintenanc e • •• Removing and refitting suspons ion

Removing ... Hefi tting .•

Dismantling and re-assembling ••. Heplacemen ta

Stub axle bushes Transverse leaf spring. 'rransverso spring bushes Steering Elms ••• Telescopic shock absorbe r

Tracking llnd \'/heel base checks .. Anti-roll bar. Special too l s •

Page

5 7 8 9

9 10 10

17 20 2 1 21 22 2) 25 26

- J - SECTION 6.

S E R V ICE BULLETIN

( RECORD SIIEET

No. Subject Date Signature

•

• , . -,

SECTION 6.

• • ;;

• , • • • ,

Z o •• Z. • • oU •• ,. • •

• • , • o Z • • :::

- I~ -

(

• •

• ~ U •

- 5 - SECTION 6.

FRO N T SUS PEN S ION

1,( DESCRIPTION

•

• (

Genera.l

The front suspension unit. illustrated in Fig. 1, consists of No . 01'088-

member with integral suspension brackets. ll. tranSVerse loaf spring. telescopic

shock ab sorbe rs and the hub and s tub axle assemblies_ The cross-member. which

i s bo l ted direct to the chassis fra me, a l so carries the t~o radilltor mountin g

brackets and provides the mountin gs f or the stee rin g box aDd the heade r of the

"One-sho t" 1 ubrica ti on sys tom.

'rho transverse l ed spring passes through the cross-oember whero it i s

located by the round head of the centre bo l t in the spring, which fit s in u

locating bore in the base of the cross-mombe r. The s pr ing is bus hod at its

outer ends and is secured b etween two "U" pi aces and yokos b~· bo l t s nnd nut s .

Ri ght-hnnd and lelt-hand saf ety links and s traps are fi tted between the e nds of

the spring and cross-momber at the front. The inner ends of Ihe links and the

outer ends of the straps are secured by n sing lo high tensile stoel bol t and

s plit-pinned Dut to the extensions of each spri ng l e nf outer c lip, sec Fig.5.

The ends of the spring and the radiu s arms are attached to the s wivel pin s

of the stub axle a s semblies, (se e Fi g. J), the transverse l eaf s pring ncting a s

the lower links. and the rad i us arms forming the upper links . These joints are

enveloped in protective gaiters. The swive l pin is bushod a l i ls upper end to

complete the uppc r link and fit s in the bushed s tub axl e , while a brack e t for

the lower link is keyed to n taper at the bottom end of the sw iv e l pin. The

swivel pin end-float is controlled by shims fitted betweon its bottom bracket

SECTION 6.

~ONE SHOT'" lUeAICATION PIPE TO SlUe

- 6 -

,,,,,,coe~ ,~. "'~""!'

PIN HYOfI.o.ULK; IIA"'~E PIPE

Fig. 2 Plan view of front s uspens i on un it .

BRAK E FLUIO PIPE TELESCOPIC SHOCK ABSORBER

STEER ING BOX

SAFETY LINK SPRING

HE"OER

SAFETY STRAP M EMB ER

Fig. J Front view of front s us pen s ion unit.

•

• (

c

•

•

- 7 - S&CTION 6 .

Ilnd the s t ub ax le, a thrust washer being fitted at its upper end. The brake

drum bac k plntes arc bo lted t o flanges on the stub axles, t ho stub axles each

c arrying tho two ba ll bearing s for the wheol hubs.

Te l escopic s hook absorbe rs

These uni ta are fitted be tween the s uspens ion un i t hracke ts a ttached to the

cross-member. and the bot tom brackets of the stub ax l e swive l pin s. Arnol t-

Bri s tol cars are Ci tted wi th a compl ete set of "Armstrong>t te l escopic s hock

a b sorbers or a compl ote se t of " Girling" te l escopic s hoc k a bso rbers. The two

t ypes a r e a s fo ll ows:-

Front suspens ion

Type - AT7 - 11 85

Setti ng - 850/75 751650

Dis tributo r s in the U.S.A.: -

The Armel Co •• 6, Ohio Avenue, Port Washin gton, N. Y.

Fron t sus pen s ion

Part No. DAS. 6/54NF

Agents in the U. S.A.; -

"Armst r ongtt

"Girling"

Lucas Electrica l Servi ces , (Inc.), 653, Tenth Avo., (Corn e r 46th St.), and New York.

Rear s us pen s ion

Type - AT7 - 11 86

Sett ing - 1 150/75 751900

Br it i s h Auto Pa r t s, Inc. , 1455,. Bu sh st r eet, San Franci sco, Californ i a.

Rear s us pens ion

Part No. DAS. 9/35NF

8 163, Mel rose Avenue, Los . An ge l e s , Ca l ifornia .

SECTION 6. - 8 -

No servicing of these units in the accepted sense is needed; in the event

of failure. fit replacement units . Occasional inspection is desirable to see

that the rubber bearing bushes at the top and bottom of the units arc in good

order; if they are worn or perished, fit replacement bushes.

Type . • •

'rracking

Laden wheel camber angle ••

End- float of swive l pin •• .

Di ametre l clearance of swivel pin •..

Torque l oadin g of swi vel pin secu ring nut ..

End-float of transverse leaf spr i ng link ..•

Dimne t ral clearance of bottom link pin

Torque loading of s teering arm secur ing nuts ...

Diametral c l ea r ance of top link pin .

'forque IOllding of transverse spring sec ur ing bolt nuts.

End-fl oat of suspension bracket fulcrum pin • •

GENERAL DATA

Independent transverse spring.

Toe- in J/16in. (4'76 m. m.) to -hn. (J '1 8 m.m.) measured at the rims at ke rb side weight.

Zero to ( 508 ·02

+ i O, s pring camber with 1,1 20 lb.

kg.) l oad supported by two fr ont tyres.

O·OOOin. to Q·OOJin. (0'000 to 0·08 m. m.), adjus ted by shims .

0·OO02in. to 0·002i n. (0·005 m. m. to 0'05 m.m. ).

40 to 50 lb . ft. ( 59 ' 526 to 74'41 kg. Im. ).

O·OOOin. to O·Q07in. (0·000 to 0·t 8 m.m.).

0·0012in. (; ' 1 m.D. L

to O·0042in . (O'OJ m.m. to

50 to 60 lb. f t. (74·41 to 89·29 kg./m.).

O·0005in. to Q·OO27in. (0'01) m.m. to 0·07m.m.).

J8 to 1~2 lb. -f t . ( 57 '55 to 62'5 k g./m.)'

O· 002in. to O · OO/~in. (0'05 m.m. to 0'1 m.m.).

•

• c

•

•

- 9 - S'CTION 6.

lalA I NT&NANCK

After every 5,000 miles (8,000 k.m.).

Check the torque loading of the four transverse s pring securing bolt nuts.

Periodically

It is advisable occasionally to check the front wheel tracking (see

pn ge 2J) as any excessive maladjus tment will cause uneven tyre wea r and af fect

the steering of the cnr •

REMOVING AND REFITTING SU3PESSIO~

Removing

1. Check that the handbrake is on, then rai s e the front of the car sufficiently to place s tand s beneath th e main chassis membe rs, then remove the jack.

2 . Disconnect the cross head of the stE' e ring pinion from the coupling of the steering column.

}. Remove the wheels. see Section 10 .

5.

6.

Hemove the radiator. see Section 2 •

If an anti-roll bar is radius arms. then move impede progress.

fi tted, disconn ect the clamps on the the bar to a po si tion whore it does not

Disconnect the main pipe of the "One shot- system connecti on on the front engine mounting bracket on the side of the chassis.

from the 1 ef t-}land

7. Di sconnec t the main brake pipe at the three-way connection on the left-ha nd sus pens ion brack et.

8 . Position a ga rage jack and carofu ll y suppo rt the whole of the front suspension.

SECTION 6. - 10 •.

9. Support t he coginc.

10. Finally r emove the four bolts and the four set-screws holding the cross-moll1ber to the chassis frame.

11. Manoeuvre the a ssembly clear of the car.

Refi t tiDg

1. Jack up and manoeuvre the unit into its correct position.

2. With a pllliD wa s her fitted ben eath the heads, enter t h e two long bolts (the outer bolt from the front and the inner from tlte rear) throu gh the two upper securin g bol t holes in each side of the cross-member and the front flno ge of each main chass i s memberj fit a washe r to each and screw on the four nuts fin ger ti gh t. Fit tabwashe r s to the heads of the f Oll r 5 hOl'tor bol t s and screw them into position from the rear. Tighten the nuts a nd bolts secure ly, then lock the nuts with split pins a nd the bolt s wi th the tabl'o'ashcrs.

J. Connect th e mai n brnkc fluid pipe to the connec tion on th e l oft­hand suspension b,'acket. R3connect the main pipe of the 'lOne shot" system to the connection on the left-hand front e ngine ~ing b r acket. bleeding the pipe as described in Sect ion 11.

4. Where applicable , pos i tion the a nti-roll bar and secure the clrunps to t he radius a r ms .

5. Reconnect the steerin g co lumn fl exib le coupling.

6. Refit the radi ato r. see Section 2.

7. Refit the road I\'heels. see Section to.

8. Jack up th e ca r , remove the chassis stands and engine support then l ower the car to t he ground.

9. Bl eed the brake s ys tem front ""heol track ing and

as de tail e d in Section B a nd c heck alignment as detailed in page 2J.

DISMAN'rLING AND m~-ASSEMBLING

the

The di s mantling and assembling wi ll be f aci litated if a fixture s imi l ar to

that illustrated in Fig. 4 i s made and bo lted to t h e bench. Th e top holes in

•

• (

(

•

• (

- 11 - SECTION 6.

the cross-menlbor l oco.t(' on the stud s of t he fixture and the oross-member i s ro-

tained by four 7/16in. B.S . ~'. nut s . The assembly is then held rigidly Dnd in

its normal position.

Dismantle as fol10ws:-

t. Remove the protective gaiters.

2.

}.

DisJIlant1e the the steering Section 9.

right-hand and l eft-hand tie tube assemblies from box rack/ stub axle assembli es /lS detailed in

Uisconneot the ~One s hot" system flexible pipos fitted hetw een the two adaptors on the front of the cross-member and the stub axle s . Di sconnect and r emove the rigid pipe fittod between the header and the adap t o r on th e front of th e cross -member, the unions on the s uspension brackets and the two unions on the s teerin~ hox. Remove the main feed pipe fi tted bet\1een the front l ef t-hand en gine mou n t ing bracket and the header then remove the header.

4. Withdraw t.he split pins and remove the nut s and bolts securing the ri gh t-hand and I ef t-hand saf e t.y s t raps to the cros s-rnernbe r and leaf spring clips . Remove the safety straps and segregate the bush . washers and di s tance pieces with their respective bol t a .

5.

6.

7.

8.

9.

Remove the detai 1 ed in

s teering box Section 9.

f rom the front of the c ros s-membe r 8.S

Wi thdraw the spli t upper end of each brackets . Hetain distance s pool.

pin an d ,'cmove the nut and bol t securin g the tcloscopi c shock absorber to the s uspen s ion the distnnce pieces. rubber g rommets and

Di s conne ct the right-hand and the left-hand radius arms from the stub axle s wivel pins by Ioii thdrawing the s plit pin and removing the nut and the top pin. Take ca r e no t to damage the "En ots" a daptor ac r ewed into the head of each pin. Next wi thdraw the split pin. unscrell' thc nu t . withdraw the bottom pin from th e stub axle bottom bracket and the ends of the transverse spring. and remove the ri ght-hand and left-hand stub axle assemblies. Take care not to lose the safety links and the rear di s tanco washer. and seg regate them until required.

Di sconnect the telescopic shock a bsorbers from the right-hand and left-hand bott om brac kets LlS described for the upper end in operation No. 6.

Remove the {-i n. then unlock and

bo l t from the radius arm at the stu b axle e nd remove the rear nu t from the attachment bracket

SECTION 6. - 12 -

IN. WHIT. • '" IN. 1t 21t~. 101 .5 .

• l"ig.4 Dismantlin g and a ssembl ing fixture.

BOTTOM SR4Cl(ET DISTANCE WASHER ourEl'! CLII> TR .... NsvERse SPfIING

• C. 252

S .... FETy UNK SAfETY STAA,P CAOSS-MOIl BEA

Fi g.5 Link Ilnd safety s trap.

c.

c ~ , ', '

•

•

10.

- IJ - SKCTION 6.

fulcrum pin . Tap out tho swive l pin together with the major ann. Label the thrust washe r s fitted to each end of the pin. then hook .out and discard the oil soals Ilt eac h end of the sus­pension bracket bearing.

Remove the locknuts from the four transverse spri ng securin g bolts then lI' ithdraw the bolts through the apertures in the top of th e cross-member. Remove the two yoke bars fr om the top of the s prin g then 'l'i thdraw the spring from the cross -membe r . fol l owed by the "un pi eces .

~'urtheI' di s mantling of the hub a ssemblies and the stee ring box unit

are described in Sect ion 10 and 9 respectively. 'fhe me thod of dismant-

ling the stub ax lo assembly i s desc ribed on page 17 •

Assemb l e the front s uspension a ssembly as follo ws : -

1. Bolt the cross-membe r to thc bench fix t ure. sce b' ig. 4.

2 . Assemble each su s pensi on bracket unit as follows. Fit a new f e l t sea l to the front recess of the brackc t. bearing then. wi th t.he correct thrust wa s her fitted against the lI1aj o r ann, in sert the fulcl'ulU pin. Place another new feI t sea l over the end of the pin into the bearing r ecess. followed by the s econd thru s t washer and the minor arm. Fit the l ockwa s hcr and nut a nd ti ghte n secu rely. Check tha t the end-floa t i s within t he limit givcn in the Gen e r a l Data. If necessal·Y. obta in the correc t e nd - fl oat by selective a ss emb ly of the r ea r t.hrust 'Wash e r. These a r e avai l ab l e in the fol l owing t hi c kn esses : -

J.

o· 15 1 in. 0 '1 55 in . 0 ' 159 in.

(J'S4 m.m.) (J'94 m.m.) (4 '04 m.m. )

0'16) in. 0'167 in.

(/ .. '1/ .. m.m.) (/ .. ' 21" m. m. )

When sa ti sfactory. l oc k the fulcrum pin nut.

Pl ace the t"o MU" pieces each s ide of the locating

in to posi tion bore i nside the

over the bo l t holes on cross-membe r .

4. In sert t h e transverse sprin g through the cro ss-mem ber, and taking care not to displ.ace the MU" pieces. align the centre bol t of the sp ring wi t h the l ocating bore in the ba se of the c ro ss-member.

5.

6.

Pl ace the yo ke bars over the spring and in line wi th the two "D" pieces. then fit the four retaining bolts from the top and screw on the nut. Li ghtly nnd evenly ti ghten the nut s until the round head of the s pring centre bolt i s drawn into the locating bo re but d o not finally tighte n until the assembly i s fi tted to the car chass is, see page 2 1.

Fit t he shock abs o rb e r s at a nd rubb e r g rommets to the

this stage. small end

Fi t th e distance tube of the s hock absorber.

SECTION 6. - '4· -

"~:~:;:;';~ SHOCK AI RUB8ERS

C 4 2 1 Fig.7

Fi g. 6 Shock absorber lowe r attachment.

SCRAP VIEW SHO WIN G SAFETY STRAP ASSEMBtED

DISTANCE PIE C'- ___ _

PIECE

Shock abso rbe r uppe r a ttachmen t .

8USH

STRAP

C2SS

L ______ ''''W<C' P lEe E

Fi g. 8 Safety strap attachment.

•

• (

(

•

•

7.

- 15 - g8CTION 6.

fol l owed by the t wo di s tanc o pioces as shown in Fig. 6. then compress s ufficientl y to onte r the eye of the stub axle bottom bracket. Fi t the i In. B. S. F. bol t from the rear. screw on the nut. then tighten securely and lock with the split pin.

Fit t he stub axle assembl y to the s uspension assembly by i nsert­ing the lug on the uppe r end of the swive l pin into the end lugs of the radius arms. then insert (from the rear) the top pin; flats on the pin l ocate it correctly. Screw on und tighten th e nut and lOJ!k with a sp l it pin.

8 . Fi t the bottom bracke t over the end of t he transverse spri ng and i nacrt the safe ty link be tween the bracket and the s pring a t the front. Assemble th e distanco washer between the bracket and the spring soe Fi g. 4. The washers are avail a ble in the follow ing thicknesses : -

0'113 in . 0' 120 in.

(2 ' 8 7 m.m . ) (J·05 m.m.)

0' 127 in. 0'0/ .. in.

0'23 m. m.) 0'/. 1 m.m.)

Se lect a was he r to g ive a c l earance within the limi ts q uoted in the General Data on page 8 , then u s ing the thread protector and l ead-in TFN 5001 , inscrt the bottom pin from the fr ont locating it by means of the fl a t s , then screw on and tighten the nut llnd lock with II s plit pin. It i s preferable to insert a bottom pin ",·i th the l oad-in as. apart from any s light mi s ­alignment of t he various bores . it al so helps to locat e the various wa s hers.

9. Fit the distance spoo l. rubber g rommets, washers and nuts to th e l a r ger upper end of the shoc k absorber; tighten the nuts. ~'it the assembled upper end of the s hock absorber to the sus pe n s i on bracket, inse rt th e bo lt s, then fi t a plain washer and sl o tted nllt ; ti ghten thc nut and lock wit.h a split pin.

10. Assemble the steering box a ssembl y t o the front of the cross­membe r as detai l ed in Sect ion 9 .

1 1. Assemb l e the ri ght-hand a nd left-hand safety straps . If the bush has been removed from the safety s trap . refit it with its flange to the front, then place the safety s trap into pasi tion in the cross-member so tha t the bush flnn ge abuts the ins ide of the member as s hown in Fig. 8 . Wi th a. p l ain washer fi tted beneath the hea.d, insert tho bolt f r oD! the inside. Fi t a plain wa s her and slotted nut. ti ghten securely and lock wi th a s pli t pin.

Note:- The s afety s traps with the cuL-away in l<~ig . 8.

are "handed" nnd must be fi tte d portion to t he bottom as shown

Align the elongated hole of the sa f ety strap wi th tho se of the saf ety link. n. nd l eaf s pring bracket. Fit a 5/16in. 0·94 m.m.) plain was he r and the small distance piece on to the bol t

SECTION 6.

SWIVEL PIN ___ +

- 16 -

STUB AXLE

'"'"

c'%l4--_____ STUB AJlLE

'"'"

Stub ax l e assembly.

•

AX LE

• c

l

•

•

- 17 - SRCTION 6.

f o llowed by the 7/ 16io. ( 11'11 m.m.) sprin g and plllin washers. th e n wi th th e lon g di s tance piece interposed be twe e n the lugs of the l eaf spr ing clip. enter the bolt from the front. Fit a 5/16in. (7'94 m. m.) plain washer Ilnd nut, ti ghten securely Ilnd lock with a spl it pin. s ce Fig. 8. Check tll u t there i s a cl earance between the s afety s trap and cro ss -membe r.

12. Ass emble the header of the "One shot" s ys tem by me ans of a {in.

1}.

14.

15.

B. S.F. bolt and s hake-proof washer. to its location on t he front of the cro ss-membe r; ti ghten t he bo l t secure l y.

Connect up t he rigid pipes between the header and the steering box and th e two adaptors on the fron t fac e of the cross-member. and the un ions on the suspension brackets. Connect the fl exibl e pipes between the adaptors and t h e s tub ax le swivel pin s . Support each flexible pipe by mean s o f clips to the front radius arms . Fi t the main feed pipe to t he header and th e l oft-ha nd fron t eng ine mounting bracke t.

AssembJ ~ t he ri ght-hand and twe e n th e s t eerin g bo x r a ck a x l e a ssembli es , a s d e tail ed

left-hand ti c t ub e assemblies be­and the ste el' j ng anns on t he stub i n Section 9,

Opera te the em e r ge from gai te r s .

tlO ne th e

s ho t" lubrication pedal until variou s bearings, the n fi t

I~EPLACEMENTS

S tub axl o bushes

o i 1 is seen to the protective

If the s tub axlo bushes 0" the top link bushe s in th e swivel pin r equire

rep l acement, r e mov e the s tub ax l e from the car a s foll o'll's : -

1. Ch ec k tha t the handbrake i s ON . th e n place a ga rage jack cent­r a ll y beneath t he front cross-member and rai s e t he front of the car suffici ently t o lift the wheels off th e g r o und . Av oid dam ­a ge to the lubri c a t ion a nd hydraulic pipe l i n os.

2 . Remove th e wheel as detailed in Section 10.

J. Di sconnect the flexibl e brake pipe a t it s union on t he bra ke drum backplate .

4. Di s connect t he s t ee ring a ssemb l y ball j oint a s deta iled i n Section

tie 9.

tube at th e s t ee ring arm

S~CT10N 6. - 18 -

5. Remove the gll i t e r s that envelope t.he upper and l ower swivel pin links .

6. Disconn ect the flexible pipe of t.he "One shotn systom from the top pin.

7. Re 1 ease the washor t.ab, unse row the nu tat the ba ttorn of the swive l pin and withdraw the bottoln bracket. Remove the s hims and the woodruff key and segregate them un til r equired. Wi th­draw the swivel pin. takin g care not t o lose the thrust washer from beneath the head.

To remove and refit the bushes in the stub axle, proceed as follows:-

1. Extract the e xisting bushes.

2.

J.

Remove Ilny burrs from the top a nd bottom of the bores Ilnd thor­oughly clean the bores.

One end of each bus h i s chamfered to facilitate inse r tion; thi s also ensures that the bush i s fitted with the s piral oil g roov e in its bore the correct way up. Press in the new bu s hes until flush wi th the faces of the bores.

4. Using the specia l reamer n'N.457 f; . finish ream both bushes in posi tion.

5. Lightly polish the s lI'ivel pin a nd trial-fi t. see Geneml Data.

To r emove and refi t the s wi vel pi n bus hes. adopt the f ollowi ng procedu re: -

1. Extract the existing bushcs.

2 . 'rhorou ghly clean the bores .

J.

I •.

5.

Press in the new bushes . location end faco s .

h:nsure that the bush fluD ges abut the

lleasure the diameter of the top pin and. using a s uita bl e reamer, ream both bus hes in position to obtain the diametra l clearance quoted in the Gen e ral Data on page 8. If the top pin is worn. fi t a now ono.

Using n posi tion

suitable facing to tho dimensions

cutter. g iven in

spot Fig.

face 10.

both bushes in

He-ass emble in the revers e order for di smantling. Make su re that the

thru s t washer is r e fitt ed beneath the hoad of the s wiv e l pin (1. o. with its

•

• c

(

•

•

- 19 -

REAM TO

Fig. 10 Overall d imons ion of s wivel pin bus hes.

Fi g. 11

]

Fi g. 12

C. 261. Steeri ng box locati on bolt

in central pos ition •

TF N.5002

Ch ec king front whee l tracking.

J

SEC'rION 6.

~.

SECTION 6. - 20 -

chamfer aga in s t the pin he ad) and that the correct s hi ms a r c fitted between the

bottom brac ket of the swivel pin a nd stub axle. Check that the swivel pin end-

float in the s tub axle is within the limits quoted in the Gene ral Data on page 8i

if nec essa r y, adjus t a s required by fitting or d e l e ting s hims . which may be ob-

tained in thic knesses of O'OtO in. (0 *2 5 m.m.) and 0 -005 in. (0 · 1] ,

in. la . ,* When

satisfactory. bloed the brake system as d otai l ed in Sec ti on 9. and check the

front whee l tracking and alignment as detllil od on page 2).

Transverse l eaf spring

] fi t i s necessa r y to r emove the transve r se 1 eaf sprin g . proceed as e f ol1 01'1 8: -

1. Check l h t.ll. the handbraKe i s ON, then I'oi se the front of the ca r jus t s uff ic i en tl y to lift the whee l s off the ground a nd s upport its we i ght by pl ac in g axle s tands und e r the chass i s on each s ide. Avoid do.mage t o the l ubricati on and hydrauli c pipe l ines.

2. ILemove both f r ont wheels a s deta il ed in Section 10 .

J . Hemove the s tub axles a s des cribed on page 17.

4. Hemove the four tran s verse s pring securin g bolt locknuts and standa rd nuts at the base of th e cro ss -memb e r, then withdraw the bolt s tlll'ough the apertures in the t.op of t.he momb e r.

5. Itemov e th e t .... ·o spri n g yokes from the t op of the s pring inside the cross-membe r.

6 . Hcmove the s pring from the cross··member by lif t ing one end of the sprin g and, using a hide mall et on the lift ed end. tap the spring through the cro ss-member un t il it can eas ily be withdrawn a t t he oppos i te end.

7. Uemovc the two "U" pi eces from in s ido t he- cross-memb e r.

To refit the t.rans v e r se l eaf spring. proceed a s f o ll ows : -

I. PI uce the tw o " U" pi eces in the approx i ma te pos i ti ons i n the cross-membo r.

• (

(

•

•

2. In se rt ona wi 11 go . the spr in g (i . o. when bore ill t he

- 21 - SECTION b.

end of the spri ng in the cross-member as far as i t Lift the protruding end and, using a hide mallet, tap

through the cross-membe r un ti l it is in position the centre bolt h ead is l ocated over the locating base of the cross-member) .

J . Place t h e two spring yokes in posit i on on t he spring and inser t t he four s pring attaclunent bolts through t h e ho l es provided at the top of the cross-member. taking care t hat each bolt is in se rted through the s pring yoke a nd "U" piece, then sc rew on the four 7/ 16in. B.S.F. standa rd nuts. Li ght l y tighten t he nuts until the centre bolt of the spring is drawn into the ancho rage hole, but do not tighten fina ll y until the spring is in the nonnnl position (i.e. with the weil!ht of the car on the wheels) see operation 6.

4. Assemble the safety st raps and s tub axles .

5. Replace the front wheels a s d etai l ed in Section 10 and l ower the ca r.

6. Ti ghte n t he four standard spring attachment bol t nuts to the torque quoted i n the Gene ral Duta on pa ge 8 , then l ock wi th the loc knuts . Check the tracking as desc ribed on pnge 23.

'f rsns ve r se spring bushes

Proceed a s fol l ows:-

1. Extract the existing bu shes .

2 . Thorough ly clean th e bush l ocating bores in t ho ends of the s prin g .

3. Pro ss in the new bushes.

4. Glean up the bush end fac es · with the l ocating faces . th en measu r e tho diamete r of t he bottom pin a nd, u s ing 11 s ui tnble r eamer, ream the bush in posi tion to obtain the diametr .... ' c l ear­ance quoted in the Genernl Data on page 8. If the bottom pin is worn, fit a new one.

Steerin g 8ms

The stee r ing ams are "handed" a nd they must t here f o re be fi tted to their

correct stub ax l es. Upon r e pl acemen t, e nsu re that the key is a tight fit in t he

SECTION 6. - 22 -

arm and in the koyway; always replace a damaged key with n new one. After re-

placement. torque tight~n the s ecuring nuts to tho figure given in the General

Data then check the tracking a s described on page 23.

Telescopic s hock absorber

To remove the telescopic shoc k absorbers. proceed as follows:-

1.

2.

Check that the handbrnke is ON. front o'f the car. ,\void dllllloge to pipe lines.

Rclmovo the rel evant front .... ·hee l.

then jack up Ilnd support the the lubri cation a nd hydraulic

J. Withdraw the s plit pin ilIld remove the nut and bolt securing the lower end of the shock ab s orbe :- to the stub arm swivel pin bracket. \h thdraw the s hock absorb e r from the bra cket and re­move the di s t a nce pieces, rubb e r grommets and distance lube.

4. To disconnect the s hock abs orber at its uppe r end from the s us­pension bracket. remove t.he s plit pin. nut. washer and bolt; wi thdraw the s hock absorber. Hemove the nut from the s pool. s ce Fig. 7. f ollowed by the was her then withdraw the s poo L f o l) owed by th e I! r ommets .

The refi tting procedure is I1S foll ows : -

1 •

2.

Fi t the distance tube and rubber gromme t s to the sma) 1 end of the s hoc k abs orbe r. f oll owed by the two di s tance pieces . flan ges intfords . Compress the end a ssembly s uffi ciently to a ll ow it to be inserted into the bottom bracket. Fit the bolt from the rear, fit a plain washer. and s crew on and ti ghten the nut.

Fi t the rubber g rommets to the upper end of the shock abs orber, then fit the s pool. complete with one nut and washer. Fit the other washe r a nd nut and tighten the nut. Place th e s hock abs orber in pos ition in the s us pension bracket. fit the bo lt from the rear. a ssemb l e the was her and nut. then tighten the nut .

J. Uefit the fr ont wh ee l and] oweI' the car.

•

• (

(

•

•

- 2J - SECTION 6.

THACHNG AND \VH~ Ii:L BASE CHEe's

'1'0 adjust the front whoel tracking, proceed as fo11ow8:-

1.

2.

Uetach the steering box cove r by spring washers, and ensure that the in the guide s lot. see Fig. 11.

removing locating

the bol t

six nuts and is cen tral i sed

Noto: - An alternative method of cent ralising the rack is to a li gn its shoulder with the machined end of the steering box ca st ing at the end remote from the steering column. see Fig. 2 of Section 9.

Using the tracking bar 'rFN. 5002, measure the front and rear edges of the wheel rims at hub l evel as shown in Fig. 12. Revolv e the wheel and check in three posi tions. The whee l s must be parallel with each other within a tolerance of ~in. to 3/16in. O· 18m.m. to4"76 m.m.).

J. To adjust, d e tach the rubber t e l escopic s le eves fr om the ends of the tic tubes and steering rack on each side . and s lide them clear. then slacken the l ocknut, and turn the ball bolt connect­in g the tie tube to the rack until the correct position is obtained. Ensure that the rack remains in the cen tral position during the adjustment.

Note:- Do not unscrew the ba ll bolts so that their threads c l ear the inspection holes at each end of the steering ra ck, sce Fig. 13.

Check and adjust the wheel base as follows :-

1.

2 .

J.

Remove the followed by

embellisher the two du st

caps from the front and ca ps from the front wheels.

rear wh ee l s

Make the diagonal check given on page )2 of Section 7. When satisfactory. check the dis tance between the centres of the hubs as s hown in Fig. 14. us ing the t rammel TFN . 5068j thi s should be the s ame on both s ides of the car.

If adjustment i s required . che ck that the steering is in the central posi tion. Assuming that the toe-in has been set corr­ectly, s lacken the locknut and tUrn the ball bolts connecting the t ie tube to the rack . To maintain the to e-in while corr­ecting the wheel base. turn the ball bolts in equal increments. screwing one in and the other out. It i s usually possibl e to see in lI'hioh direc tion t o turn by the runound of th r ead visib l e. When the wbeel base ha s been corrected, aga in check the toe-in and finally l ock the ball bolts.

4 . Repl ace the two dust caps. the four embellisher caps. the stee r ­ing box cover (if removed), and the tele sco pic rubber sleeves.

SRCTION 6. - 2~ . -

TE L ESCO PIC I !.[(YE

'"' C. 263.

• Fi g. I) Tie tube adjus tme n t •

•

]

TFH. 50bS • Fi g. 14 Checking ""he e l bas e,

(

,

c

•

• (

- 25 - SECTION 6.

ANTI-ROLL BAR

This is a torsion bar which can readily be fitted to the front suspension of

the Arnolt-Bri s tol car. 1 t is illustrated in Fi g, 15 and is mounted on two pads

provided on the underside of the chassis frame.

coupl ed to clamps attached to the radiu s arms.

The extremities of the bar are

The whole installation is a

complete Assembly and no parts are rendered redundant as a result of its fitment.

To fit the bar. refer to Fi g. 15. which is self explanatory.

torque l oading OD the clamping nut is 18 l b.ft. (26'78 kg/m.) .

Fi g. 15 Anti-roll bar.

Note tha t the

- 27 - S&CTION 6.

(

S P E e l A L TOO L S

•

• ( ,

- 29 - SEC TION 6 .

( "f

I, ' . ' ,. " ~. "

, i j ~

, HAR DEN tL~

1,1, I' ' I -" ,-'

"-., ' ,:, rI 3E 'F~~i

, I I \ '" y r- I

o,~ , , ~~ P ,r " ,r ' ,

~0 G.l-.. ®.-., , , 0 ;:

I

• -ilc ~ ~~

~ jli . -

'-,

"\ cp : I:

" , , " ,j' 'iV

WE LD WHE RE SHOWN ., i ,,: ~ , .'0/(/ , ,

, , or : , ,;0 M I ,

IIE "'I OE SCR IPTlON T oNF9;- M ATER IA L S IT[t.oI DEseR I PT IO N "0 , MATER IALS

" , F I XTUI:>E ENDTL&S , 1.111.0 STEE L , TRACl(ING "" , MH .. O STEEL

• , "DJ. TR.o.CI( PI N , 0 0

, P ILI..AA,.:rAACk PIN , 0 0

, PILLAlHAACI( PIN , 0

'0 S P RI NG , TO su n

• K NURLf.!) l.OQ(NIJ , 0 " "'""'" "' ... , M ILD STE EL , 0 0 , 0 0 " CENHIE lUSE ,

• FOlTUI1E . "BASE , M .S.CHANNEL " N~' TAPER PINS , , C"'IHIIER , MILD STEEL C.l 71l/1

T RACKING BAR T. F. N . 5002

(

S &CTION 6 .

,. i6 RAD.

~

- ) 0 -

' 0

,. -~r-

I O FF M. S

SPANN ER T.F:N. 5035

~

0 0

" • 0 '" 0 " '!'

I· 2 B.S.F.

5" 32

9" 16

3· 32

I" le

1 1.~ + ·oro· 8 + -020·

V ~ 1\

~ :x;; C 378 2 . I . .

I AAa. M AJ( .

•

.1" 2 RAD.

M.S. CASE -HARDEN •

C. 378/3

THREAD PROTECTOR AND LEAD-IN TF N. 5001

(

•

• !.

- 31 -

:Jl ['jj

-· , ·

· , ·

'+ , ""I -

"..; ... --: -• ·

- '';F I

i I -" i •

- 0

· · ,

'0 " x

:"1:::

. ..

" 0 -800 01.0, . "X FIT

L c, ... .

• TO CUT 0-600 OIA , '" ~

.

CUTTER :-

6 FLUTES. 5 0 L_H SPIR .c . R- H CUTTlN G.

OSPHOR TO CUT PH BRONZE.

0-789' X FIT

MATERIAL :-H . S. SleE HARDENED GROUND.

, ANO

C.J7S/a.

SECTION 6.

PILOTED REAMER FOR STUB AXLE BUSHEST.F'NA578.

SECTION 6 .

C. "58 .

'--- 'O"" ' M.S.

~ __ , Off- M.S.

f iT .

- J2 -

.0·

'0", '·0/'"'' OIA."IISS.W.G.-M.S.

,. -----1-=7'-"-'"-1 I OFF- i OIA.S.S. PIN ~ -DRIVE f iT.

PARALLEL TRAMMELS .

•

I Off -SPRING TO SUIT. • T.F.N.S068.