SsangYong Rexton. Service manual — part 499
SECTION 4B
FRONT BRAKE
TABLE OF CONTENTS
Description and Operation . . . . . . . . ... 4B-2
Caliper . . . . . . . . . . . . . . . . 4B-2
Clearance Calibration . . . . . . . . . . ... 4B-2
Specifications . . . . . . . . . . . . . .. 4B-2
Diagnostic Information and Procedures . . . .. 4B-3
Inspection . . . . . . . . . . . . . . . . 4B-4
Pad Thickness . . . . . . . . . . . . . . 4B-4
Brake Disc Thickness . . . . . . . . . . .. 4B-4
Brake Disc Run Out . . . . . . . . . . . . 4B-5
Caliper Housing I.D . . . . . . . . . . . .. 4B-5
Component Locator . . . . . . . . . . . . 4B-6
Cross-Sectional View . . . . . . . . . . ... 4B-6
Front Caliper Brake . . . . . . . . . . . .. 4B-7
Repair Instructions . . . . . . . . . . . . 4B-8
On-Vehicle Service . . . . . . . . . . . ... 4B-8
Front Brake . . . . . . . . . . . . . . .. 4B-8
Brake Pad Replacement . . . . . . . . . 4B-10
Unit Repair . . . . . . . . . . . . . . .. 4B-13
Brake Caliper . . . . . . . . . . . . . 4B-13
SSANGYONG Y200
4B-2 FRONT BRAKE
DESCRIPTION AND OPERATION
CALIPER
This caliper has a single bore and is mounted to the
steering knuckle with two mounting bolts. Hydraulic
pressure, created by applying the brake pedal, is
converted by the caliper to a stopping force. This force
acts equally against the piston and the bottom of the
caliper bore to move the piston outward and to slide
the caliper inward, resulting in a clamping action on
the rotor. This clamping action forces the linings against
the rotor, creating friction to stop the vehicle.
However, as a part of the piston seal is fixed into a
grove in the cylinder shape of the seal is as shown in
below figure, distorted toward the piston moving
direction.
When the pressure is taken off from the brake pedal
and the hydraulic pressure is released from the piston,
a restoring elastic force is generated at the seal and
pushes the piston rightward and back it in original
position.
As the pads wear away and the clearance between
rotor and pads become larger, the piston moves larger.
The seal then could change in shape further, but since
end of the seal is fixed into the groove in the cylinder,
the distortion is limited to the same amount as
previously described.
The piston moves further to cover the distance of
clearance. As the piston returns by the same distance
and the rubber seal recovers its original shape, the
clearance between the rotor and pads are maintained
in original condition.
YAD4B010
YAD4B020
CLEARANCE CALIBRATION
When the hydraulic pressure is applied to the piston,
the piston moves leftward. The piston seal, which extent
considerable pressure against the piston, moves with
cylinder.
SPECIFICATIONS
Application
Caliper Cylinder I.D.
Pad Thickness
Disc Thickness
MANDO
Ventilated Disc Type
Ø 60 mm
10 mm
24 mm
Delphi Korea
←
←
←
←
FRONT BRAKE 4B-3
SSANGYONG Y200
Pad Wear, Hardening
Oil Or Water Contamination On The Pad
Inoperative Caliper
Pad Wear, Hardening
Oil Or Water Contamination On The Pad
Uneven Wear Or Twisted Of The Disc
Inoperative Caliper
Inoperative Caliper Returning
Pad Wear
Pad Wear, Hardening
Damage On The Disc
Interference Of The Dust Cover
Loose Caliper Mounting Bolts
Replace
Replace and Repair
Replace
Replace
Replace and Repair
Replace
Replace
Replace
Replace
Replace
Replace
Repair
Tighten
Poor Braking
Uneven Braking
Dragging Brake
Excessive Pedal Travel
Noise and Vibration When
Brake Applied
DIAGNOSTIC INFORMATION AND PROCEDURES
Condition
Possible Cause
Action
SSANGYONG Y200
4B-4 FRONT BRAKE
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YAD4B040
YAD4B050
Clean the dissembled parts and visually check the
followings;
•
Wear, rust and damage on the cylinder and piston
•
Damage, crack on the caliper body and damage,
wear on the guide pin
•
Pad uneven wear and oil contamination
•
Boot’s damage and tear
•
Disc plate’s scratch and bending
INSPECTION
PAD THICKNESS
1. Remove the front wheel.
2. Measure the thickness and replace as needed.
BRAKE DISC THICKNESS
1. Measure the thickness of the rotor at four or more
points around the circumference of the rotor.
2 If the thickness of the rotor is below the specified
value, replace the brake rotor.
Thickness
10 mm
Max wear Limit
2 mm
Thickness
24 mm
Max wear Limit
22 mm
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