Toyota Celica Supra 1986 Service And Repair Manual page 481

BR-4 BRAKE SYSTEM - Troubleshootin2
1 1
TROUBLESHOOTING
( Cont' d )
~
Problem
"""' . ,..
_.
..
Remedy
.....
SQuealing, g.-oaning or
Rotors and plds worn
Of
500red lnsPfC1, service or replace
BR·14,20
chittering notse when
Disc brakes-mlstii'\Q or damaged
Replace BR·14.20
1
br.kes art applied
brake pad anti·sQueal shim
Disc brak&s- burrt<t or rusted calipers
Clean
Of'
deburr BR·16.22
Note:
Brakt
frict ion
materials inhtrtntlv
Dirty, grened, contamin~lted or glazed
Clean or
repl a~
BR·14.20
ge11eta1t noise
tnd
linings
heat in ordtr to dis- I mJ)foper lining PlfU
lnsptC:t for correct usage,
BR ·14.20
sipatt energy.
As
1
rt·
rtpiKt
suit, oc:cas~t
JqUUI
Mal·adju:nmeru of bflke pedal« booster
IMPKttnd adjun
BR-6.12
is nonT\11 and
ts
push-foci
lfiriYittd by severe
loose or d.meged shoe retaining pins. lnsptC1, wvice or replace
BR·26
environmtntll
condi·
tions such as cold,
spcings and clipS and grooved back ing
htat, wetness, snow,
pla te ledges
salt, mud. otc.
Pad we&r and
~d
wear lnctic.ator making Replace
BR· 14,20
This
ooct~ion1l
squeal contact with the rotor
is not a funct iortal
ptobltm ltld da.s not
indicate tny 10$$ of
~
blake tfftc:tivtneu
Squetling noin when
Bent or warped backing plate causing
Service or rtpltce
BR·28
bfakts art not
IJ)pfied
inte.rferenca with drum
__..
Improper mtchining of drum causing
Replace drum
BR·26
interference with backing plate or shoe
Mal-adjustmtnt of buke pedal or booster Inspect e nd tdjvst
BR ·8.12
pu$h·ro<l
Poor return of brake boo$ter or rnaner Inspect,
serv~e
or replace BR·9.12•
cylinder
14.20
Oi.sc twakes- tuntd, stuck lni9Kt.lubricate as nec:essary 8R·14.20
Other blake system components: lnspea~
Yn"ice, replace as
BR·26
Loose or ex tra parts in brakes requirtd
Rear dtum ldjunment too t ight
j
causing lining to glue
Worn, damaged or insufficiently
lubricated wheel bearing.s
Drum brakes- weak, dtmaged or
BR·26
inco,tet shot hold·down springs
Drum brak es- grooved backing plate BR·26
ledges
lmprQPe-r positioning of pad in caliper BR·14,20
Outside diameter of rotor rubbing
caliper housing
Housing installtdon of d isc brake pad
BR· 14.20
support plate
Pad wear and pad wear indicator m ak ing
BR-14.20
contact w ith the rotOf'