2003 HONDA CIVIC caliper

Conventional Brake Components
{Front Brake Caliper Overhaul
Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health.. Avoid breathing dust particles.' Never use an air hose or brush to clean brake assemblies. use an osHA-approved vacuum cleaner.
Remove, disassemble, inspect, reassemble, and install the caliper, and note these items:' Do not spill brake fluid on the vehicle; it may damage the paint; if brakefluidgetsonthepaint,washitoffimmediately with water.. To prevent dripping, cover disconnected hose joints with rags or shop towels.. Cleanall partsinbrakefluidandairdry;blowoutall passageswith compressed air.. Before reassembling, check that all parts are free of dust and other foreign particles.. Replace parts with new ones as specified in the illustration.. Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid,' When reusing pads, always reinstallthem in their original pos itio ns to prevent loss of braking efficiency.. Do not reuse drained brake fluid.'AlwaysuseHondaDOT3brakefluid.Non'Hondabrakefluidcancausecorrosionandshortenthelifeofthesvstem.
. Do not mix different brands of brake fluid as they may not be compatible.. Coatthe piston, piston seal groove, and caliper borewithclean brakefluid.. Make sure no grease or oil gets on the brake discs or pads.. Replace all rubber parts with new ones whenever disassembled.. After installing the caliper, check the brake hose and line for leaks, interference, and twistinq.
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19-14
108 N.m 111.0 kgf.m,80 tbt.ft)

Gonventional Brake Components
IBrake Booster Test
Functional Test
1. With the engine stopped, press the brake pedal
several times to deplete the vacuum reservoir, thenpress the pedal hard, and hold itfor 15 seconds. lfthe pedal sinks, either the master cylinder is
bypassing internally, or the brake system (master
cylinder, lines. modulator, or calipers) is leaking.
2. Start the engine with the brake pedal pressed. lf thepedal sinks slightly, the vacuum booster is workingproperly. lf the pedal height does not vary, thebooster or check valve is faulty.
3. With the engine running, press the brake pedal
lightly. lfthe brake pedal sinks more than 1O mm
{3/8 in, ) in 3 minutes, the master cylinder is faulty.A slight change in pedal height when the Ay'C
compressor cycles on and off is normal. (The A,/C
compressor load changes the vacuum available tothe booster.)
Leak Test
1. Press the brake pedal with the engine running, thenstop the engine. lf the pedal height does not vary
while pressed for 30 seconds, the vacuum boosteris OK. lf the pedal rises, the booster is faulty.
2. With the engine stopped, press the brake pedal
several times using normal pressure. When thepedal is first pressed, it should oe row.
On consecutive applications, the pedal height
should gradually rise. lfthe pedal position does notvarv, check the booster check valve.
19-18
3. Disconnect the brake booster vacuum hose (check
valve built-in) (A) at the booster side.
5.
4.Start the engine, and let it idle. There should bevacuum available. lf no vacuum is available, thecheck valve is not working properly. Repiace thebrake booster vacuum hose and check valve, andrelesI.
Reconnect the brake booster vacuum nose.
Start the engine, and then pinch the brake boostervacuum hose between the check valve and thebooster,
Turn the ignition switch OFF, and wait 30 seconds,Press the brake pedal several times using normalpressu re,
When the pedal is first pressed, it should be low.On consecutive applications, the pedal height
should gradually rise.
. lf the pedal position does notvary, replacethe
brake booster.. lf the pedal position varies, replace the brake
booster vacuum hose/check valve assembly.

Conventional Brake Components
Rear Brake Pads Inspection and Replacement
Frequent inhalation of brake pad dust, regardless ofmaterial composition, could be hazardous to your
hea hh.. Avoid breathing dust particles.. Never use an air hose or brush to clean brake
assemblies, Use an OSHA-approved vacuum
cleaner.
Inspection
'1. Raise the rear of the vehicle, and support jt with
safety stands in the proper location (see page 1-8).Remove the rear wheels,
2. Check the thickness of the inner pad (A) andouterpad (B). Do not include the thickness of the brakepad backing plate.
Brake pad thickness:
Standard: 8.5 9.5 mm {0.33-0.37 in.}
Service limit: 1.6 mm (0.06 in.)
B -::--
lf the brake pad thickness is less than the servicelimit, replace allthe pads as a set.
3.
19-20
Replacement
1. Remove the bolt (A) and brake hose {B} from themounting bracket.
Remove the caliper bolts (C), and remove thecaliper (D) from the caliper bracket.
Remove the pad shims (A) and pads (B).3.
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4. Remove the pad retainers (A). and check the caliper
pins for free movement.
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7.
8.
5. Clean the caliper thoroughly; remove any rust. and
check for grooves and cracks.
6, Check the brake disc for damage and cracks.
Apply Dow Corning Molykote M77 grease to the
retainers on their mating surfaces against the
caliper bracket,
Installthe pad retainers. Wipe excess grease offthe
retainers. Contaminated brake discs and pads
reduce stopping ability. Keep grease off the discs
and pads.
Apply Dow Corning Molykote lvl77 grease to both
sides of the pad shims {A), the back of the pads (B),
and the other areas indicated by the arrows. Wipe
excess grease off the shim. Contaminated brake
discs and pads reduce stopping ability. Keep
grease off the discs and pads.
9.
..-.
10. Installthe brake pads and pad shims correctly.
Installthe pads wirh the wear indicators {C) on the
inside.
lf you are reusing the pads, always reinstall the
brake pads in their original positions to prevent a
momentary loss of braking efficiency.
11. Rotate the caliper piston clockwise into the cylinder,
then align the cutout (A) in the piston with the tab
{B) on the inner pad by turning the piston back so
the caliper can be installed on the pad. Lubricate
the boot with rubber grease to avoid twisting the
Diston boot. lf the piston boot is twisted, back it out
so it is positioned properly.
8 x 1.25 mm22 N.ml2.2 kgt m,16 rbl.ttl
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D8 x 1.25 mm23Nm{2.3 kgf.m,17 rbf.ft)
13.
14.
Installthe brake caliper (C) and caliper bolts (D).
and tighten the bolts to the specified torque.
Installthe brake hose (E).
Press the brake pedal several times to make sure
the brake works, then test-drive.
NOTE: Engagement of the brake may require a
greeter pedal stroke immediately after the brake
pads have been replaced as a set. Several
applications of the brake pedal will restore the
normal pedal stroke,
15. Check the parking brake adjustment {see page 19-7).
16. After installation, check for leaks at hose and line
joints or connections, and retighten if necessarY.
19-21

Rear Brake Caliper Overhaul
Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health.
' Avoid breathing dust particles.
. Never use an air hose or brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner'
Remove, disassemble, inspect, reassemble, and installthe caliper, and note these items:
. Donotspill brake fluid on the vehicle; it may damage the paint; if brake f luid gets on the paint, wash it off
immediately with water.. To prevent dripping. cover disconnected hose joints with rags or shop towels.
. Cleanall partsinbrakefluidandairdry;blowoutall passageswith compressed air'
. Before reassembling, check that all parts are free of dust and other foreign particles
. Replace pans with new ones as specified in the illustration.. Make sure no dirt or other foreign matter contaminates the brake fluid.
. When reusing pads, always reinstallthem in their original positions to prevent loss of b ra king efficie ncy.
. Do not reuse drained brake fluid.
. Use only clean Honda DOT 3 brake fluid. Non-Honda brake fluid can cause corrosion and shorten the life of the
system.. Do not mix different brands ot brake fluid as they may not be compatible.
. Coatthe piston, piston seal groove, and caliper bore with clean brake fluid.
. Make sure no grease or oil gets on the brake discs or pads.
. Replaceall rubber parts with new ones whenever disassembled.
. After installing the caliper, check the brake hose and line for leaks, interference. and twisting.
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: 10 MM FLANGE BOLTS.:r=,9!q!q}l 55 N m (5.6 lgf-m, 4r lbt ft)
19-23

Conventional Brake Components
{Brake Hoses and Lines Inspection
1. Inspect the brake hosesfordamage, deterioration, leaks, interference, andtwisting.
2. Check the brake lines for damage, rusting. and leakage. Also check for bent brake lines.
3. Check for leaks at hose and line joints or connections, and retighten if necessary.
4. Check the master cylinder and ABS modulator unit for damage and leakage.
NOTE: Replace the brake hose clip whenever the brake hose is serviced.
15 N.m (1.5 kgf.m, 11 lbf.ftl
ABS MODULATOR UNIT-Io-BRAKE LINE15 N.m {1.5 kgf m.11 lbf.ftl
BRAKE HOSE-to-CALIPERlBANJO BOLTI3il N.m {3.5 kgf.m.25 lbt'ft)BLEEO SCREW9 N.m {0.9 kgf.m,7 lbf.ftl
MASTER CYLINDEB-to-BRAKE LINE15 N m {1.5 kgt.m, ll lbf.ft)
CONTROL VALVE-to-
L
BRAKE HOSE.tO-CALIPER{BANJO BOLTI34 N.m {3.5 kgf.m, 25 lbl.ft)BLEED SCBEW9 N.m10.9 kgf.m, 7 lbf ft)
BRAKE LINE15 N.m 11.5 kgf m, 11 lbf.ft)
BRAKE LINE-Io-BRAKE HOSE15 N.m (1.5 kgf.m,11lbf.ftl
BRAKE LINE-to-BRAKE HOSE
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19-24

Brake Hose Replacement
NOTE:. Do not spill brake fluid on the vehicle; it may damage
the paint; if brake fluid gets on the paint, wash it off
immediately with water.. To prevent dripping, cover disconnected line joints
with rags or shop towels.. Before reassembling, check that all parts are free of
dust and other foreign particles.
. Replace parts with new ones whenever specified to
do so.
1 . Replace the brake hose (A) if the hose is twisted,
cracked, or if it leaks.
Disconnect the brake hose from the brake line (B)
using a 10 mm flare nut wrench {C)
Remove the flange bolt (A), and remove the brake
hose brackets from the damper.
Remove and discard the hose clip (B).
Remove the banjo bolt (C), and remove the brake
hose (D) {rom the caliper.
4.
I x 1.25 mm
6. Installthe brake hose bracket (A)on the damper
with the flange bolt (B) first, then connect the brake
hose (C) to the caliper with the banjo bolt {D) and
new sealing washers (E).
7. lnstallthe hose onto the hose bracket on the bodv
with a new hose clip (A).
10 x 1.0 mm15 N.mi (1.5 kgf.m,
! 1t tbt.ftl
Connect the brake line to the brake hose.
After installing the brake hose, bleed the brake
system (see page l9-8).
Do the following checks:
. Check the brake hose and line joint for leaks, and
tighten if necessary.. Check the brake hoses for interference and
twisting.
9.
10.
19-25

ABS Components
System Description (cont'd)
ABS Modulator
The ABS modulator consists of the inlet solenoid valves, outlet solenoid valves, reservoir, pump, pump motor, and the
damping chamber. The modulator reduces the caliper fluid pressure directly. lt is a circulating-type modulator
becausethe brakefluidcirculatesthroughthecaliper,reservoir,andthemastercylinder.Thehydrauliccontrol has
three modes: pressure intensifying, pressure retaining, and pressure reducing. The hydraulic circuit is an independent
four-channeltype, one channel for each wheel.
Pressure intensifying mode: Inletvalve open, outlel valve closed
Master cylinder fluid is pumped out to the caliper.
Pressure retaining mode: lnlet valve closed, outlet valve closed
Caliper fluid is retained by the inlet valve and outlet valve.
Pressure reducing mode: Inlet valve closed, outlet valve open
Caliper fluid flows through the outlet valve to the reservoir.
lvlotor operation mode: When starting the pressure reducing mode, the pump motor is ON.
When stopping ABS operation, the pump motor is OFF.
The caliper fluid is pumped out by the pump, through the damping chamber, to the
master cvlinder.
19-40