1997 MITSUBISHI TRITON Workshop Manual

BASIC BRAKE SYSTEM ± Troubleshooting35A-8
SymptomProbable causeRemedy
Insufficient parking brake functionWorn brake lining or padReplace
Grease or oil on lining or pad surface
Parking brake cable sticking
Stuck wheel cylinder or caliper piston
Excessive parking brake lever strokeAdjust the parking brake lever stroke or
check the parking brake cable routing
Auto adjuster malfunctionAdjust
Scraping or grinding noise when
brakes are applied
Worn brake lining or padReplace
brakes are a lied
Caliper to wheel interferenceCorrect or replace
Dust cover to disc interference
Bent brake backing plate
Cracked drums or brake disc
Squealing, groaning or chattering
noise when brakes are appliedDisc brakes ± Missing or damaged
brake pad anti-squeak shimReplace
Brake drums and linings, discs and pads
worn or scoredCorrect or replace
Improper lining parts
Disc brake ± Burred or rusted calipersCorrect or deburr
Dirty, greased, contaminated or glazed
liningsClean or replace
Drum brakes ± Weak, damaged or
incorrect shoe hold-down springs, loose
or damaged shoe hold-down pins and
springsCorrect or replace
Incorrect brake pedal or booster push rodAdjust

BASIC BRAKE SYSTEM ± Troubleshooting35A-9
SymptomProbable causeRemedy
Squealing noise
when brakes are
Bent or warped backing plate causing interference with drumReplace
when brakes are
not appliedDrum brakes ± Weak, damaged or incorrect shoe-to-shoe
spring
Poor return of brake booster, master cylinder or wheel
cylinder
Loose or extra parts in brakesRetighten
Improper positioning of pads in caliperCorrect
Improper installation of support mounting to caliper body
Improper machining of drum causing interference with
backing plate or shoeReplace drum
Disc brakes ± Rusted, stuckLubricate or replace
Worn, damaged or insufficiently lubricated wheel bearings
Incorrect brake pedal or booster push rodAdjust
Groaning, clicking or
rattling noise when
Stones or foreign material trapped inside wheel coversRemove stones, etc.
rattling noise when
brakes are not appliedLoose wheel nutsRetighten
Disc brakes ± Loose installation bolts
Worn, damaged or dry wheel bearingsLubricate or replace
Disc brakes ± Failure of shimReplace
Disc brakes ± Wear on sleeve
Incorrect brake pedal or booster push rodAdjust

O
N-V EH IC LE S ER VIC E 35100090131
B RAKE P ED AL C HEC K A ND A DJU STM EN T
B RAKE P ED AL H EIG HT
1 . Turn b ack th e c a rp et e tc . u nder th e b ra ke p edal.
2 . Measu re th e b ra ke p edal h eig ht a s illu str a te d. If it is n ot
w it h in th e s ta ndard v a lu e, a dju st a s fo llo w s.
S ta n dard v alu e: 1 76 ± 1 81 m m ( F ro m t h e s u rfa ce o f
m elt in g s eat t o t h e f a ce o f p ed al p ad )
( 1 ) Dis co nnect th e s to p la m p s w it c h c o nnecto r, lo ose n
t h e lo ck n ut, a nd m ove th e s to p la m p s w it c h to a
p osit io n w here it d oes n ot c o nta ct th e b ra ke p edal
a rm .
( 2 ) Adju st th e b ra ke p edal h eig ht b y tu rn in g th e o pera tin g
r o d w it h p lie rs ( w it h th e o pera tin g r o d lo ck n ut
l o ose ned).
( 3 ) Scre w in th e s to p la m p s w it c h u ntil it c o nta cts th e
b ra ke p edal s to pper ( ju st b efo re b ra ke p edal is c a use d
t o m ove ), r e tu rn th e s to p la m p s w it c h 1 /2 to 1 tu rn
a nd s e cu re w it h th e lo ck n ut.
( 4 ) Connect th e c o nnecto r o f th e s to p la m p s w it c h .
( 5 ) Check to b e s u re th at th e s to p la m p is n ot illu m in ate d
w it h th e b ra ke p edal r e le ase d.
3 . Retu rn th e c a rp et e tc .
B RAKE P ED AL F R EE P LA Y
W it h th e e ngin e s to pped, d epre ss th e b ra ke p edal tw o o r
t h re e tim es. A fte r e lim in atin g th e v a cu um in th e b ra ke b ooste r,
p re ss th e p edal d ow n b y h and, a nd c o nfir m th at th e a m ount
o f m ove m ent b efo re r e sis ta nce is m et ( fr e e p la y) is w it h in
t h e s ta ndard v a lu e r a nge.
S ta n dard v alu e: 3 ± 8 m m
I f th e fr e e p la y e xce eds th e s ta ndard v a lu e, it is p ro bably
d ue to e xce ssiv e p la y b etw een th e c le vis p in a nd b ra ke p edal
a rm .
C heck fo r e xce ssiv e c le ara nce a nd r e pla ce fa ult y p arts a s
r e quir e d. P
edal d ow n
P edal u p
L ock n ut 0
.5 ± 1 .0 m m L
ock n ut O
ute r c a se

W
hen e n gin e is
s to pped W
hen e n gin e is
s ta rte d

A
cce pt/r e je ct c rit e ria C
onnectio n a t th e b ra ke
b ooste r s id e ( A ) A
n egativ e p re ssu re
( v a cu um ) is c re ate d a nd h eld . C
onnectio n a t th e in ta ke
m anif o ld s id e ( B ) A
n egativ e p re ssu re
( v a cu um ) is n ot c re ate d.

3
( 4 )
1
4 ( 3 ) L
oad s e nsin g
p ro portio nin g
v a lv e
( ) : R .H . d riv e v e hic le s 2

S
prin g le ngth H
m m I
n put flu id
p re ssu re k P a O
utp ut flu id
p re ssu re k P a 2
W D 1
90*1 3
,6 25 1
7,6 52 5
,3 90 2
15*2 1
4,3 93 4
W D 1
90*1 4
,3 09 1
7,6 52 6
,0 74 2
15*2 1
6,3 10 L
oad s e nsin g
p ro portio nin g
v a lv e S
to pper b olt
Sto pper b olt
c o nta ct p osit io n
H
1 0 m m