Brake booster HONDA CIVIC 1996 6.G Workshop Manual

Engine Removal/lnstallation
Removal (cont'dl
10. Relieve fuel pressure (see section l1).
!@ Do not smoke while working on the fuelsystem, Keep open flame or spark away from thewolk area. Drain fuel only inlo an approved container.
11. Remove the evaporative emission (EVAP) controlcanister hose and fuel feed hose.
D16Y7 engine:
BANJO BOLT33 N m ( 3.it lgt m, 25 lbt.ft)
FUEI- FEED HOSE
D16Y5, D16Y8, Bt642 engines:
5-4
I
12. Remove the brake
hose and vacuum
D16Y7 engine:
booster vacuum hose, fuel returnhose.
VACUUM HOSE
Dl6Y5, D16Y8, Bl642 enginos:
BRAKE BOOSTERVACUUM HOSE

Cylinder Head
Removal (cont'd)
9. Relieve fuel pressure (see section 11),
E@E Do not smoke while working on tho fuelsystem. Ke6p opgn flame or gpark away from lhework area, Drain fuel only into an app.oved containgr.
10. Remove the evaporative emission (EVAP) controlcanister hose, fuel feed hose and breather hose.
D16Y7 engine:
BANJO BOLT33 N.m {3.4 kgt m,25 tbf.ftt
BREATHER HOSE
D15Y5, Dl6YB engines:
BANJO AOLT33 N.m (3.4 kgf.rn,25 tbf.ftt
EVAP CONTROLCANISTER HOSE
6-28
(
1 1. Remove the brake booster vacuum hose. fuel returnhose and vacuum hose (see page S_4).
12. Remove the water bypass hose and positive crank_case ventilation (pCV) hose.
016V7 engine:
PCV HOSE
D16Y5, D16Y8 engines:
\a
I
WATER EYPASS
PCV HOSE

Cylinder Head
Removal (cont'd)
8. Remove the P/S pump lower bracket.
8 x 1.25 mm24 N.m 12.4 kgf.m,17 tbtftl
9.
T SHIELD
10.
P/S PUMP LOWERBRACKET10 x 1.25 mm44 N.m {4.5 kgf.m,33 tbf.frl
Relieve fuel pressure (see section l1).
@ Do not smok6 while working on fuel
system, keep open flam€ or spark away lrom work
ar€a, Drain fuelonly into an approved cortain€r.
Remove the evaporative emission (EVAP) control
canister hose, fuel feed hose and breather hose.
BANJO BOLT33 N.m (3.4 kgl.m.25 lbf.ftl
BREATHERHOSE
WASHERS
6-68
\.
11. Remove the brake booster vacuum hose, fuel return
hose and vacuum hose (see page 5 4).
12. Remove the water bypass hose and positive crankcase
ventilation (PCV) hose.
WATER BYPASSHOSEWATER EYPASSHOSE
Remove the throttle cable and throttle control cable
by loosening the locknut, then slip the cable end out
of the throftle linkage.
NOTE;
. Take care not to bend the cables when removing
them. Always replace any kinked cable with a new
one.
. Adjust the throttle cable when installing (see sec-
tion I I ),. Adjust the throttle control cable when installing(see section 14).
CONTROLCABLE
1a
PCV HOSE

t
Conventional Brake
Speciaf Tools .............19'2
Component Locations
lndex ................ ...... 19-3
Inspection and Adiustment
Brake System Rubber Parts
and Brake Booster ...........,.,............. 19-4
Brake Pedal ............ 19-5
Parking Brake ........ 19-6
Bleeding ................. 19-7
Front Brake Pads
Inspection and Replacement .......... 19-8
Front Erake Disc
Disc Runout Inspection ................... 19-12
Disc Thickness and Parallelism
Inspection .......... 19-12
Front Brake Caliper
Disassembly .......... 19'13
Reassembly ........... 19-16
Master Cylinder/Brake Booster
Removal/lnstallation ....................... 19-21
Pushrod Clearance Adiustment ...... 19-22
Brake Booster Inspection ................ 19-23
Rear Brake Pads
Inspection and Replacement ,,........ 19-24
Rear Brake Disc
Disc Runout lnspection ................... 19-26
Disc Thickness and Parallelism
Inspection .......... 19-26
Rear Brake Caliper
Disassembly ...........19-27
Reassembly ........." 19-31
Rear Drum Brake
Index/lnspection .............................. 19-35
Inspection ....,.,....... 19-36
Brake Shoe Disassembly ..............." 19-37
Brake Shoe Reassembly ...............'.. 19-37
Brake Hoses/Lines
Inspection/Torque Specifications ..... 19-39
Hose Replacement ........................... 19-40
Parking Brake Cable
lnspection and Replacement ........,. 19-41
l-l

Component Locations
I
lndex
ERAKE PEDALInspectron andAdjustment, page 19 5
BRAKE HOSES LINESInspection/Torque specif ications, page 1 9-39Hose Replacement, page 19-40
MASTER CYLINDER/BRAKE BOOSTERRemoval/lnstallation, page 19 21Pushrod Clearance Adjustment, page 19_22
Brake Booster Inspection, page 19-23
lJ
PARKING BRAKE CASLEinspection and Replacement,page 19 41
FRONT BRAKESNOTE: There are two types offront brake calipers:The caliper types can be identitied by the "5410"
or "2056" stamped on the caliper body. Check thetype ot the brake caliper betore servicing.Front Brake Pads5410 Type: page 19-82056 Typer page 19 10Front Brake Disc, page 19-12Front Brake Caliper5410 Type: page 19-132056 Type: page 19-14
BBAKEAdiustment, page 19-6REAR ORUM BRAKESInspection, page 19-36
Brake Shoe Beplacement, page 19'37
REAR DISC BRAKESRear Brake Pads, page 19 24Rear Brake Disc, page 19 26Rear Brake Caliper, page 19'27
lJ
19-3

Inspection and Adjustment
€)
@
@
@
Brake System Rubber Parts and Brake Booster
Brake Boostet
Check brake operation by applying the brakes.
lf the brakes do not work properly, check the brake
booster, Replace the brake booster as an assembly
if it does not work properly or if there are signs of
leakage.
Piston Cup and Pressure Cup Inspeqtion
. Check brake operation by applying the brakes.
Visually check for damage or signs of fluid leak-
age.
Replace the master cylinder as an assembly if
the pedal does not work properly or if there is
damage or signs of fluid leakage.
. Check for a difference in brake pedal stroke
between quick and slow brake applications.
Replace the master cylinder if there is a differ-
ence in oedal stroke.
Brake Hoses
Visually check for damage or signs of fluid leakage.
Replace the brake hose with a new one if it is dam-
aged or leaking.
Caliper Piston Seal and Piston Boots
Check brake ope.ation by applying the brakes.
Visually check for damage or signs of fluid leakage.
lf the pedal does not operate properly, the brakes
drag. or there is damage or signs of fluid leakage,
disassemble and inspect the brake caliper. Replace
the boots and seals with new ones whenever the
brake caliDer is disassembled.
Wheol Cylindor Piston Cup and Dust Cover
Check brake operation by applying the brakes.
Visually check for damage or signs of fluid leakage.
lf the pedal does not operate properly, the brakes
drag, or there is damage or signs of fluid leakage,
disassemble and inspect the wheel cylinder. lf nec-
essary, replace the wheel cylinder as an assembly.
19-4

Master Cylinder/Brake Booster
IRemovaUlnstallation
CAUTION:
. Be care{ul nol to bend or damage the brake lines when
rsmoving the mastsr cYlinder.
. Do not soill brakefluid on the vehicle; it may damage
the paint; if brake fluid does contact the paint, wssh
it off immediatelY with water'
. To prevent spill3, cover the hose ioints with rags or
shop towels.
9. Remove the four booster mountlng nuts
10. Pull the brake booster forward until the clevis is
clear of the bulkhead.
11. Remove the brake booster from the engine com-
panmenr.'12. Install the brake booster and master cylinder in the
reverse order of removal.
CAUTION:
. When connecting the brake lines. make sure
that there is no inte erence between the brake
lines and oth6r Parts.
r Be careful not to bend or damage the brake lines
when installing the master cylinder.
NOTE: lf replacing the master cylinder or brake
booster, check and adiust the pushrod clearance
be{ore installing the master cylinder (see page 19-221'
Fill the master cylinder reservoir, and bleed the
brake svstem (see Page 19-7).
After installation. check the brake pedal height and
brake pedal tree play (see page l9-5) and adjust if
necessary.
BRAKE BOOSTER(With ABS: 7" + 8" tandem brake booster)
BRAKE FLUIO LEVELSWITCH CONNECTORS
MASTER CYLINDER
VACUUM HOSE
1.
2.
3,
5.
Disconnect the brake fluid level switch connectors'
Remove the reservoir cap from the master cylinder'
The brake fluid may be sucked out through the top
of the master cylinder reservoir with a syrlnge.
Disconnect the brake lines from the master cylinder'
Remove the master cylinder mounting nuts and
washers.
\l/
6. Remove the master cylinder from the brake booster'
7. Disconnect the vacuum hose trom the brake booster'
8. Remove the cotter pin and clevis pin from the clevis'
CAUTION: Do not disconnect the clevb by remov-
ing it from the operating rod of the brako booster' lf
the clevis is loosened, adiust the pushrod length
before installing th€ brake booster (see page 19-221'
COTTER PINReplace.
To Rear Wheel Cylinders
14.
-6.4CLEVIS PIN
To Front Caliper(Without ABS)$
t'N't'ttrnt'-''
To Front CaliperlWithout ABSi
PBOPORTIONING CONTROL VALVE
15 N.m {1.5 kgl m,11 tbtft)
15 N.m {1.5 kgif.m, 11 lbtft}(With ABS: To modulator unit)lr
19-21

Master Cylinder/Brake Booster
Pushrod Glearance Adjustment
NOTEr
. The master cylinder pushrod-to-piston clearancemust be checked and adjustments made, if neces_sary, before installing the master cylinder.. ABS type is shown, conventional brake type is similar.
1. Set the special tool on the master cylinde. body; push
in the center shaft until the top of it contacts the endofthe secondary piston by turning the adjusting nut.
Without disturbing the center shaft's Dosition, installthe specialtool upside down on the booster.Install the master cylinder nuts, and tighten to thespecified torque.
Connect the booster in-line with a vacuum gauge O _
101 kPa (0 - 760 mmHg, 30 in.Hg) to the booster,sengine vacuum supply, and maintain an enginespeed that will deliver 66 kpa (500 mmHg, 20 in.Hg)vacuum.
With a feeler gauge. measure the clearance Detweenthe gauge body and the adjusting nut as shown.
Clearance: 0 - 0.4 mm {0 - 0.02 in)
VACUUM GAUGE(Comm€rcially availeblel0 - 101 kPa{0 - 760 mm Hg, 30 in.Hg)
AOJUSTING NUT
FEELER GAUGE
19-22
10.
NOTE: lf the clearance between the gauge bodyand adjusting nut is 0.4 mm (0.02 in), the pushrod-to-piston clearance is 0 mm. However, if the clear_ance between the gauge body and adjusting nut is0 mm, the pushrod-to-piston clearance is 0.4 mm(0.02 in) or more. Therefore, it must be adjusted andrechecked.
6. lf clearance is incorrect, loosen the star locknut, andturn the adjuster in or out to adjust.
NOTE;
. Adjust the clearance while the specified vacuumis applied to the booster.. Hold the clevis while adjusting.
Tighten the star locknut securely.
Remove the special tool.
0 - 0.4 mm (0 - 0.02 in)
7.
ADJUSTERPUSHRODADJUSTMENT GAUGE07JAG - SD('1(x)
9. Adjust the pushrod length as shown if the boosterrs removed.
STAR LOCKNUT22 N.m{2.2 kg,f.m, 16lbtft)
11610.5 mm{{.571 0.02 in)
PUSHRODLOCKNUT15 N.m 11.5 kgf.m, 11 tbtftl
Install the master cylinder {see page l9-21).

Brake Booster InsPection
FunctionalTest
1. With the engine stopped, depress the brake pedal
several times to deplete the vacuum reservoir, then
depress the pedal hard and hold it for 15 seconds lf
the pedal sinks' either the master cYlinder is
bypassing internally, or the brake system (master
cylinder. lines. modulator, proportioning control
valve, or caliPer) is ieaking.
2. Start the engine with the pedal depressed lf the
pedal sinks slightly, the vacuum booster is operating
normally. lf the pedal height does not vary, the
booster or check valve is faultY.
3. With the engine running. depress the brake pedal
lightly. Apply just enough pressure to hold back
automatic transmission creep. lf the brake pedal
sinks more than 25 mm (1.0 in.) in three minutes,
the master cvlinder is faulty. A slight change in
pedal height when the A'lC compressor cycles on
and off if normal. (The A/C compressor load
changes the vacuum available to the booster')
Leak Test
1. Depress the brake pedal with the engine running.
then stop the engine. lf the pedal height does not
vary while depressed for 30 seconds, the vacuum
booster is OK. lf the pedal rises. the booster is
faulty.
2, With the engine stopped, depress the brake pedal
several times using normal pressure When the
Dedal is first depressed, it should be low On con-
secutive applications, the pedal height should grad-
uallv rise. lf the pedal position does not vary, checK
the booster check valve.
l./
19-23
Booster Check Valve Test
1. Disconnect the brake booster vacuum hose at the
booster.
2. Stan the engine and let it idle. There should be vac-
uum. lf no vacuum is available, the check valve is
not working properly. Replace the brake booster
vacuum hose and check valve, and retest.
BRAKE BOOSTERVACUUM HOSE(Check valve
built-in)