1993 NISSAN SERENA Service Repair Manual

FBONT
DISC BBAKE (BI)28VA
and LD28VB)
Inspeclion (Conr
d)
ROIOR
1, S€cur€ rolor
lo wh€61
hub wirh at €asl rwo nuts.
2. Check runoul usinga dialindicalor.
Mal€ &e $.r whed bearlng dd.l end phy
16 whhln rh. specl-
fb.lionr b.loE Mdng. F6ldio *don FA.
t{uimm runoul:
0.0? mm
{0.0@r in)
3. ll
lh6 runout is oul ol spaciielion, iind minimum runoul
a. Femove nuls and rcior from wheel hub.
b. Shilt th6 rclor on€ hol€ and s6cu€ olor to wh@l hub
d. Bepeal deps a. to c- so that dinimum tu.oul position
4. ll lhB runout is slilloul ol sp€cilietion, tun Etor wilh on'ef
BR-23

REAR
DFUM BRAKE
e'"- -*
-4
V^
@!!
@
@
@
@
Removal
cten brake lining wiih . v*u!m du.t
@ltetor to mtntmta 0E
head of anh..B eb..lG
o oOEr natedaE.
lLke 3qE parldng
brare bE b El.€.ed @mpletely.
1 . Felease pafting
bmko l6v€r lully.
then renove drum.
fi drum ls ha.d ro m@, &|wrrc hot6 In
the pbvld€d
hd6
oln drun End righi
them ghdualy,
I lh€ drum
cdnot b. m@cd atl6r enying out
thl. opeEtlon,
E er lo 'ln.o€clid"
in "PABXING BFAKE
CONTBOT"
8R.24

REAR
DRUM
BRAKE
Removal (Cont
d)
2. Aft.r €moving ralain€r snd sh@ hold-doM sp ng, Gmove
€luh and adiuslar
spdnos.
B. erelul .ot lo do.q. p€rkinq
bEk c*lavhd $p.Eling
It
4- Disconn€cl pading
b€k6 €bl6 f@m loqgle l6v€r.
Inspecllon -
Wheel C]llnder
. Ch€ck wh€el cylinder lor leakaqe.
. Check lbi w@r, damaqe and loose
@ndilions.
Beplace it a.y such condiion exists.
Wheel Cf linder
Overhaul
Pay atl€nlion so as nol to sc€tch cylindar wh.n insra I no pis'
.EEO ^
@m^v
EE@/ t@6G
G!@ F^eFD
Inspeclion -
Drum
M.ldoun hB dl.mlei
2555 mm (10,05In)
out t-rcundns:
0o5 mn (0,0ot9
In) or be3
. Conlactsufa€
should b€ lin6li.ished wirh No.120
to 150
. Usinq a drum lalhe, lathe bdke drum il it shows so nq,
oanial w€ar of sl€Do€d w€sf.
. Anar
bEke drum has been comoleielv recondhoned or
rcplaced, checkdtun and sh@slor p@per
corlacl paft6h.
r._,ru\
Kg9
gR-25

BEAR
DBUM BRAKE
Inspeclion -
Lining
S-lrnddd linlng lhic*H.:
lhlllng 45 nm (0,17|In)
|. *llng 6,0 nn (0235
in)
Unins sd [mn (A):
15 nm (0.05!,
In)
lnstallation
Almy. p€rlom
5he dda@
adlGtrent R.,ef to 'AdlLat-
menl" In
"PAR(ING EFA(E
CONTBO!,
1. Fil
adiusler assmb y.
2. Apply
btake qrc6eioihe
contact areas shown al lefi.
3. shorl€n
adjlst€f by rclaling il,
. P.y
atr nrbn
ro dkcdon ol adlGtor,
BB-26

REAN
DRUM
BBAXE
ffi@ lnstallation
(Confd)
4. Conn&t parking
bdke €bl6lo lolgle l*t,
0, Ohe.k all part3
ar€ instEll6d prop6ny.
Fby dbndon to
dbdon ot diusbi
€. When lnstalling n4 whel cylind€r or ov€'heling wh*l
oyrind6r, ble6d air. Feter to 'Bl4di.g
pl@do€' ln "AlR
BLEEOING".
BR.Zz

PARKING
BRAKE CONTROL
Removal and lnstallation
1. To remove pad{i.g
bake eble, ftst romove cenld con-
Disconnect wariing amp enn€crof.
R6mov€ boll6, slacken
ofi and remove
adjusbng nut.
2.
3.
Inspection
2. 1,
Check.onto lever for woaf or olh€r damage
Check wnes tor disconlinliry or deledo@lon.
3. Checkwahing lamp and
iwitch Feplace I necessary.
4. Ch€ck paris
at each connectino portion
and, it d€lom€d or
5. Wilh lhe pa*ing
brake applied, check if ihe pafting
bdk6
r6v€f sroD
can be Dlshed in.
NOTE:
Wt€n ihE b..k drum h.r
ben mm ex€siGty, it en b6
h.rd to Em@
E h thb c@ bEk€ th.
F*ing bEl€
l€wf
slop by ioElng ft In.ld6lho bhl€ drun, $ th.
bEle.tF! vill
mow to lho 6ni.r et frininun 3tot4
aner th drum ha ben
€mEd in.r.ll |Ew pr*ing
bhke lerer stop,
BB-28

PARKING
BRAKE CONTROL
Adiuslmenl 1 . Adiust
cleaEnce between sh@ and drum as lollow.:
a. Felease parkins
bEke lBv€r
and [email protected]
adjustinq nu.t.
b. Deprcss b€k€ p€dal
lully at least 10 time wilh 6ngin6
2. Plll @ntro lever 4 5 notch€s. Then
adjusi @ntor tev€.
by tunifg adjust n9 nut
3. Pull @mrol lEvBr with spe.ilied
ahou|l ot torc€. Check
ever slok6snd 6n5!r6
snoolh ope€lion.
Nufrb.r ol nd!ch6:
4. Bend parking
bEke waning lamp
swiichptats so lhat
b.ake
waninq ramp comes
on when pafting
b€ke l€ver
is puled
Numb.r of
"A" mtch6
: 1 d bs
8R.29

ANTI.LOCK
BRAKING SYSTEM
PurDose
. Ex@ssi@ braking in
any .ondilion (Dry
or w€t) wi I advers€ly atf€cl lh€ nomal llh ng ot lh6 v6hi'
oles wheels and they may
Lo.k
uP.
. whenlhe to.i wheels are lo.ked, a vehicle
ca.nol be controled by
lhe
sleenno syst€m.
. When
dre Garwhees are locked,lhe vehi.le wl enlerailalspin.
The A.B.S., by the lse ol eleclronc a.d hydraulic componenls, allows lor.onlrc of braking ior@ so
thal lockinq ot lhe wheels €n be avoided in the crcunstai@s des.rbed above.
1) Ensur€s prcper
lracking perfomance
lhrcuQh steefng wheelopealion.
2) Enabl6s obsiacles lo b€ avo d6d lhough sbenng who6lopeaton.
3) Ensur€6 vehicl€ slabilily by p6v6ntng
llat spins.
o s 0
$'
rFl ttEF-d
Yffi- "Wod
Ooeration
The A.B.S. is 6nlbll6d by an €laclbnic
@nlrolunit (E
C U.), whioh rece ves signals tom vafous s€n-
sors relalinq lo v€hi.le conditon.
speed, elc.
The hydraulc
circuit is
@nlrolled by an actuabr oontaining an e ecnc molof, pump,
accumllalor and
3
sole.oids. The E.C.U. dneds lhe aclualor to ncrease, hod or docr€ase hvdElli.
Dressure to
allor
Th6 E.C.U. rcc6iv€s inlomaton reqarding
wheelspeed trom senso6, houiled one pef
wh€€|.
When ex@ssiv€ takng
lorce
causes a whee b lock, the E.C.U. sends a sgnallo th6 acrualor ro
release the rocked
wlieer.
as the wheelu.lo.ks, l €n be steercd. The E.c.u. s.nses wh6elspeed is indeasng
and re-apples
hydGulic pressu€.
The wh6e locks aoain, is €leas6d, sleered,
baked, and so on. rhs @nlinuous
lock nq and unlocking oi
lhe whees
alos lor €pid speed reduction and the vehicl€ lo b€
6leeed in
Ths hydraulic pfgssurs€n
also b6 "h€ld" conslant
bya signalsenl lom the E.C.U. to lhe aclualof.
Th6 €ar wh€€ls utl26 a load's€nsing va ve
lo ilnher prcveni
whee ocking, especially undef min mum
However, when rhe vehicre
speed is ress
than l0 ktr/h (6MPH),
rhis sysl.m do6s nor wolk
BBSO