Chevrolet BEAUVILLE SPORTVAN G10 SERIES, Руководство по обслуживанию

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SECTION 5
BRAKES
T he follow ing caution applies to one or m ore steps in the assem bly
procedure o f com ponents in this p o rtio n o f the m anual as indicated at
appro p riate locations by the term inology “ See C aution on page 1 o f this
S ectio n ” .
C A U T IO N : T H IS F A S T E R N E R IS A N IM P O R T A N T A T T A C H IN G P A R T
IN T H A T IT C O U L D A F F E C T T H E P E R F O R M A N C E O F V IT A L C O M ­
P O N E N T S A N D S Y S T E M S , A N D /O R C O U L D R E S U L T IN M A JO R RE
P A IR E X P E N S E . IT M U S T BE R E P L A C E D W IT H O N E O F T H E S A M E
P A R T N U M B E R OR W IT H A N E Q U IV A L E N T P A R T IF R E P L A C E M E N T
B EC O M ES N E C E S S A R Y . DO N O T USE A R E P L A C E M E N T P A R T O F
LESSER Q U A L IT Y O R S U B S T IT U T E D E S IG N . T O R Q U E V A L U E S
M U S T BE U S E D AS S P E C IF IE D D U R IN G R E A S S E M B L Y T O ASS U R E
PRO PER R E T E N T IO N O F T H IS P A R T .
CONTENTS OF THIS SECTION
Page
H ydraulic Brakes ............................................................................ 5-1
Pow er B r a k e s ................................................................................. 5-26
Special Tools ................................................................................. 5-28
HYDRAULIC BRAKES
INDEX
Page
General D escription ....................................................................... 5-1
M aintenance and A d ju s tm e n ts ....................................................5-3
Brake Inspection ............................................................................ 5 4
H ydraulic Brake F l u i d ............................................................. 5 4
Bleeding B r a k e s ..........................................................................5 4
Pressure M ethod .................................................................. 5 4
M anual M e th o d .....................................................................5-5
H ydraulic Brake L i n e s ............................................................. 5-6
Hoses ......................................................................................5-6
Tubing ................................................................................... 5-6
Brake Drum A djustm ent ........................................................ 5-8
Push Rod to M aster C ylinder C le a ra n c e ............................. 5-9
Parking Brake ............................................................................ 5-9
Stop Lam p Switch A djustm ent ............................................ 5-9
Page
C om ponent R eplacem ent ....................................................5-10
Drum s, Shoes & Linings-Rear Brakes .........................5-10
A nchor P i n ..........................................................................5-13
Wheel C y l i n d e r .................................................................. 5-13
Brake D rum S e rv ic in g ......................................................5-14
Shoes and Linings-Front Disc Brakes .........................5-15
Caliper O v e r h a u l................................................................5-19
Disc S e r v ic in g .....................................................................5-20
M aster C y lin d e r.................................................................. 5-21
Brake C om bination V a l v e ...............................................5-23
Brake P e d a l ..........................................................................5-24
Parking Brakes .................................................................. 5-25
Pedal .............................................................................. 5-25
C a b le s ........................... j ................................................5-25
GENERAL DESCRIPTION
All m odels are eq u ip p ed w ith a split brake system . The
system is designed w ith a separate hydraulic system for the
fro n t and rear brakes using a dual m aster cylinder (Fig. 1 and
Fig. 2).
T he split system consists basically o f tw o separate brake
system s. When a failure is en c o u n te re d on either, the o th e r is
adequate to stop th e vehicle. I f one system is n o t functioning,
it is norm al for th e brake pedal lash and pedal effo rt to
substantially increase. This occurs because o f the design o f the
m aster cylinder w hich incorporates an actuating piston for
each system . When th e rear system loses fluid, its piston will
b o tto m against the fro n t pisto n . W hen th e fro n t system loses
fluid, its piston will b o tto m on th e end o f th e m aster cylinder
body. The pressure differential in one o f th e system s causes an
uneven hydraulic pressure balance betw een the fro n t and rear
system s. The brake pipe d istrib u tio n and sw itch assembly or
com bination value, near the m aster cylinder, detects the loss
o f pressure and illum inates the brake alarm indicator light on
the in stru m e n t panel. The pressure loss is felt a t the brake
pedal by an apparent lack o f brakes for m ost o f the brake
C H E V Y V A N S H O P M A N U A L