2006 SUZUKI SX4 brake drum

Downloaded from www.Manualslib.com manuals search engine 4A-1 Brake Control System and Diagnosis:
Brakes
Brake Control System and Diagnosis
Precautions
Precautions on BrakeS6RW0D4100001
Air Bag Warning
Refer to“Air Bag Warning in Section 00”.
Brakes Diagnosis Note
Refer to “Brakes Diagnosis Note”.
General Description
Brakes ConstructionS6RW0D4101001
When the foot brake pedal is depressed, hydraulic pressure is developed in the master cylinder to actuate pistons (two
in front and four in rear).
The master cylinder is a tandem master cylinder. Brake pipes are connected to the master cylinder and they make two
independent circuits. One connects front right & rear left brakes and the other connects front left & rear right brakes.
In this brake system, the disc brake is used for the front wheel brake and drum brake (leading / trailing shoes) for the
rear brake.
The parking brake system is mechanical. It applies brake force to only rear wheels by means of the cable and
mechanical linkage system. The same brake shoes of rear drum brake are used for both parking and foot brakes.
NOTE
• The figures show LH steering vehicle.
• The difference between RH steering vehicle and LH steering vehicle is the location of the brake
master cylinder, the brake booster and ABS hydraulic unit / control module assembly.

A
421
37
7
658
I7RW01410001-01
1. Brake booster 4. Primary side 7. Parking brake cable
2. Master cylinder 5. ABS hydraulic unit / control module assembly 8. 4-way joint
3. Secondary side 6. Parking brake lever A: Forward

Downloaded from www.Manualslib.com manuals search engine 4A-5 Brake Control System and Diagnosis:
Brakes Symptom DiagnosisS6RW0D4104002
Condition Possible cause Correction / Reference Item
Not enough braking forceBrake oil leakage from brake linesLocate leaking point and repair.
Brake disc or pad stained with oilClean or replace.
Overheated brakesDetermine cause and repair.
Poor contact of shoes on brake drumRepair for proper contact.
Brake shoe stained with oil or wet with
waterReplace.
Badly worn brake padReplace.
Defective wheel cylindersRepair or replace.
Malfunctioning caliper assemblyRepair or replace.
Malfunctioning brake boosterCheck system and replace as necessary.
Malfunctioning brake master cylinderCheck system and replace as necessary.
Air in systemBleed system.
Malfunctioning ABSCheck system and replace as necessary.
Brake pull (Brakes not
working in unison)Pad, disc, shoe and/or drum are wet
with water or stained with oil in some
brakesClean or replace.
Drum-to-shoe clearance out of
adjustment in some brakes
(Malfunctioning auto adjusting
mechanism) Check for inoperative auto adjusting
mechanism.
Disc and/or drum are out of round in
some brakesReplace.
Tires are inflated unequallyInflate equally.
Malfunction in wheel cylinders (rear
drum brake model)Repair or replace.
Disturbed front wheel alignmentAdjust as prescribed.
Unmatched tires on same axleTires with approximately the same amount of
tread should be used on the same axle.
Restricted brake pipes or hosesCheck for soft hoses and damaged lines.
Replace with new hoses and new double-
walled steel brake tubing.
Malfunctioning caliper assemblyCheck for stuck or sluggish pistons and proper
lubrication of caliper slide pin.
Caliper should slide.
Loose suspension partsCheck all suspension mountings.
Loose calipersCheck and torque bolts to specifications.
Noise (high pitched
squeak without brake
applied)Contact wear indicator to brake discReplace brake pad.
Worn rear brake shoeReplace brake shoe.
Excessive pedal travel
(Pedal stroke too large)Partial brake system failureCheck brake systems and repair as necessary.
Brake fluid leakingRepair the leaking point, and bleed air.
Air in system (soft / spongy pedal)Bleed system.
Rear brake system not adjusted
(malfunctioning auto adjusting
mechanism)Repair auto adjusting mechanism.
Adjust rear brakes.
Bent brake shoesReplace brake shoes.
Brake locked Malfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.

Downloaded from www.Manualslib.com manuals search engine Brake Control System and Diagnosis: 4A-6
Dragging brakes (Without
a very light drag is
present in all brakes
immediately after pedal is
released)Master cylinder pistons not returning
correctlyReplace master cylinder.
Restricted brake pipes or hosesCheck for soft hoses or damaged pipes and
replace with new hoses and/or new brake
piping.
Incorrect parking brake adjustment on
rear brakesCheck and adjust to correct specifications.
Weakened or broken return springs in
the drum brakeReplace.
Sluggish parking brake cables or linkageRepair or replace.
Wheel cylinder or caliper piston stickingRepair as necessary.
Badly worn piston seal in caliperReplace piston seal.
Improper brake pedal free heightCheck brake pedal free height.
Pedal pulsation (Pedal
pulsates when depressed
for braking)Damaged wheel bearingsReplace wheel bearings.
Distorted steering knuckle or rear wheel
spindle or rear axle shaftReplace knuckle or rear wheel spindle or rear
axle shaft.
Excessive disc lateral runoutCheck per instructions. If not within
specifications, replace or machine disc.
Rear drums out of roundCheck runout.
Repair or replace drum as necessary.
Braking noiseGlazed brake pad and/or brake shoeRepair or replace brake pad and/or brake
shoe.
Worn or distorted brake shoeReplace brake shoe.
Loose front wheel bearingsReplace wheel hub.
Distorted backing plates or loose
mounting boltsReplace or retighten securing bolts.
Contact wear indicator to brake discReplace brake pads.
Brake warning light lights
after engine startParking brake appliedRelease parking brake and check that brake
warning light turns off.
Insufficient amount of brake fluidInvestigate leaky point, correct it and add
brake fluid.
Brake fluid leakingInvestigate leaky point, correct it and add
brake fluid.
Brake warning light circuit faultyRepair circuit.
Malfunctioning EBD systemCheck system referring to “EBD Warning Light
(Brake Warning Light) Comes ON Steady in
Section 4E”.
Brake warning light turns
on when brake is appliedBrake fluid leakingInvestigate leaky point, correct it and add
brake fluid.
Insufficient amount of brake fluidInvestigate leaky point, correct it and add
brake fluid.
Brake warning light fails
to turn on even when
parking brake is appliedBrake warning light circuit faultyReplace bulb or repair circuit.
ABS warning light turns
on after engine startMalfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light turns
on when brake is appliedMalfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light after
ignition switch has turned
ON Bulb burnt outReplace bulb.
Malfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light flashesNew ABS hydraulic unit / control module
assembly installed.Perform “ABS Hydraulic Unit Operation Check
in Section 4E”. Condition Possible cause Correction / Reference Item

Downloaded from www.Manualslib.com manuals search engine 4C-1 Rear Brakes:
Brakes
Rear Brakes
Repair Instructions
Rear Drum Brake ComponentsS6RW0D4306001
11
2
3
4
5
6 7
12
1411310 16
19 15
17
98
18
F
(a)
(b)
(c)
(d)
I6RW0D430001-01
1. Brake drum 10. Wheel cylinder 19. Bleeder plug
2. Brake shoe 11. Brake back plate : 73 N⋅m (7.3 kgf-m, 53 lb-ft)
3. Shoe return spring 12. Rear wheel hub : 12 N⋅m (1.2 kgf-m, 9.0 lb-ft)
4. Brake adjuster 13. Nut (4WD model) : 7 N⋅m (0.7 kgf-m, 5.0 lb-ft)
5. Antirattle spring 14. Parking cable : 175 N⋅m (17.5 kgf-m, 127.0 lb-ft)
6. Hold down spring 15. Rear wheel hub mounting bolt : Heat-resistant brake grease
7. Shoe hold down pin 16. Wheel cylinder mounting bolt : Do not reuse.
8. Push nut 17. Rear axle : Apply brake fluid
9. Brake shoe lever 18. Plug

Downloaded from www.Manualslib.com manuals search engine Rear Brakes: 4C-2
Rear Brake Drum Removal and InstallationS6RW0D4306002
Removal
1) Hoist vehicle and remove rear wheel.
2) Release parking brake lever.
3) Remove brake drum (1) by using 8 mm bolts (2) (2
pcs).
Installation
1) Before installing brake drum, to maximize brake
shoe-to-drum clearance, put screwdriver between
rod and ratchet and push down ratchet.
NOTE
The figure show ratchet position where brake
shoe-to-drum clearance is maximum.

2) Confirm that inside of brake drum and brake shoes
are free from dirt and oil. And then install brake
drum.
3) Start engine and then depress brake pedal with
about 300 N (30 kg, 66 lbs) load at least 3 times until
adjuster actuator clicking sound from drum brake
can not be heard so as to obtain proper drum-to-
shoe clearance.
Adjust parking brake cable referring to “Parking
Brake Inspection and Adjustment in Section 4D”.
4) Install rear wheel.
5) Check to ensure that brake drum is free from
dragging and proper braking is obtained. Perform
brake test (foot brake and parking brake).
Rear Brake Drum and Shoe InspectionS6RW0D4306003
Brake Drum
Inspect brake drum for wear.
If drum inner diameter is exceeds the limit or uneven or
stepped wear is excessive, replace the drum.
Rear brake drum inner diameter
“a”
Standard: 220 mm (8.66 in.)
Limit: 222 mm (8.74 in.)
1. Rod 2. Ratchet
I7RW01431002-01
I2RH01430009-01
IYSQ01430007-01

Downloaded from www.Manualslib.com manuals search engine 4C-3 Rear Brakes:
Cracked, Scored or Grooved Drum
A cracked drum is unsafe for further service and must be
replaced. Do not attempt to weld a cracked drum.
Smooth up any slight scores. Heavy or extensive scoring
will cause excessive brake lining wear and it will
probably be necessary to resurface drum braking
surface.
If brake linings are slightly worn and drum is grooved,
drum should be polished with fine emery cloth in the
direction of drum depth but not circumferentially along
drum inner.
NOTE
When drum is removed, visually inspect
wheel cylinder for brake fluid leakage.
Correct leaky point, if any.

Brake Shoe
Measure thickness of brake shoe (1). Also, check
surface of lining for hardening, excessive wear and oil.
Rear brake shoe lining thickness
“a”
Standard: 4.0 mm (0.157 in.)
Limit: 1.0 mm (0.04 in.)
CAUTION!
Never polish lining with sandpaper. If lining is
polished with sandpaper, hard particles of
sandpaper will be deposited in lining and
may damage drum. When it is required to
correct lining, replace it with a new one.

Rear Brake Shoe On-Vehicle InspectionS6RW0D4306004
Amount of brake shoe wear can be checked as follows.
1) Hoist vehicle.
2) Remove rubber cover (plug) (1) from brake back
plate.
3) Through hole of back plate, visually check for
thickness of brake shoe lining (2). If lining thickness
is less than specified wear limit, replace all brake
shoes with new ones.
Lining thickness “a”
Service limit: 1.0 mm (0.04 in.)
Rear Brake Shoe Removal and InstallationS6RW0D4306005
NOTE
When replacing brake shoe, replace it on the
right and left.

Removal
1) Remove brake drum referring to “Rear Brake Drum
Removal and Installation”.
2) Push and rotate 90° hold down pin (1) and remove
hold down pin (1) and hold down spring (2).
“a”
I5RW0A430005-01
2
1
I4RS0B430004-01
I7RW01431003-01

Downloaded from www.Manualslib.com manuals search engine Rear Brakes: 4C-4
3) Remove return springs, brake shoes and adjuster.
4) Disconnect parking brake shoe lever (1) from
parking brake cable (2).
5) Remove push nut (1).
6) Remove parking brake shoe lever (2) from shoe rim
(3).
Installation
Install parts in reverse order of removal, noting the
following.
• Before installing rear brake shoe to brake back plate,
clean brake back plate and apply heat-resistance
brake grease to A on which shoe rims rest.
• Push and rotate 90° hold down pin and install hold
down pin and hold down spring.
• Install brake drum referring to “Rear Brake Drum
Removal and Installation”.Rear Brake Shoe InspectionS6RW0D4306006
• Check ratchet of brake adjuster (1) assembly for wear
or damage.
• Check shoe return spring, antirattle spring, quadrant
spring and shoe hold down spring for damage,
corrosion and weakening.
• Check for smooth movement of brake shoe lever (2)
along shoe rim.
If any defective or malfunction is found, repair or replace.
Wheel Cylinder Removal and InstallationS6RW0D4306007
Removal
1) Remove brake drum referring to “Rear Brake Drum
Removal and Installation”.
2) Remove brake shoe referring to “Rear Brake Shoe
Removal and Installation”.
3) Loosen brake pipe flare nut (1) but only within the
extent that fluid does not leak.
4) Remove wheel cylinder mounting bolt (3).
Disconnect brake pipe from wheel cylinder and put
bleeder plug cap (2) onto pipe to prevent fluid from
spilling.
I2RH01430013-01
1
2 3
I4RS0A430014-01
A
A
I6JB0A430002-01
I4RS0A430016-01
1
2
3
I7RW01431004-01

Downloaded from www.Manualslib.com manuals search engine 4C-5 Rear Brakes:
Installation
1) Take off bleeder plug cap from brake pipe and
connect pipe to wheel cylinder (1) just enough to
prevent fluid from leaking.
2) Install wheel cylinder (1) to brake back plate (2), and
tighten wheel cylinder mounting bolt to specified
torque.
Tightening torque
Wheel cylinder mounting bolt (a): 12 N·m (1.2
kgf-m, 9.0 lb-ft)
3) Tighten flare nut of brake pipe (3) to specified torque.
Tightening torque
Rear brake pipe flare nut (b): 16 N·m (1.6 kgf-m,
11.5 lb-ft)
4) Install bleeder plug cap (4) taken off from pipe back
to bleeder plug.
5) Install brake shoes. Refer to “Rear Brake Shoe
Removal and Installation”.
6) Install brake drum. Refer to “Rear Brake Drum
Removal and Installation”.
7) Fill reservoir with brake fluid and bleed brake
system. For bleeding operation refer to “Air Bleeding
of Brake System in Section 4A”.
8) Upon completion of all jobs, depress brake pedal
with about 300 N (30 kg, 66 lbs) load at least 15
times until adjuster actuator clicking sound from
drum brake can not be heard so as to obtain proper
drum-to-shoe clearance.
Adjust parking brake cable referring to “Parking
Brake Inspection and Adjustment in Section 4D”.
9) Install rear wheel.
10) Check to ensure that brake drum is free from
dragging and proper braking is obtained. Remove
vehicle from hoist and perform brake test (foot brake
and parking brake).Wheel Cylinder InspectionS6RW0D4306008
Inspect wheel cylinder disassembled parts for wear,
cracks, corrosion or damage.
NOTE
Clean wheel cylinder components with brake
fluid.

Brake Back Plate Removal and InstallationS6RW0D4306009
Removal
1) Remove rear wheel hub referring to “Rear Wheel
Hub Assembly Removal and Installation in Section
2C”.
2) Remove parking brake cable (1) from brake back
plate.
3) Remove wheel cylinder from brake back plate
referring to “Wheel Cylinder Removal and
Installation”.
(b)3
4(a)
(a)
1
2
I7RW01431005-01
I6RW0D430002-02
1
I4RS0A430020-01