Geely Emgrand X7. Manual part — 382

return when the master cylinder returns.

Brake caliper and brake pad bracket: used for fixing the disc-type brake pad and the brake caliper in place to keep
in correct coordination with the hydraulic brake caliper; and slide the brake pad when the mechanical output force
acts on the brake pad.

Floating pin of brake caliper: used for mounting the hydraulic brake caliper and fixing the brake caliper in place to
keep in correct coordination with the brake caliper bracket; and leading the brake caliper to slide with respect to
the brake pad when the mechanical output force acts on.

Front disk-type brake system operated :

The mechanical output force from the hydraulic brake caliper piston is acted on the internal brake pad ; when the
piston pushes the internal brake pad outward, the brake caliper housing pulls the external brake pad inward at
the same time so as to uniformly distribute the output force; the brake pad applies the output force to both
friction surfaces of the brake plate so as to slow down the tire and the wheel assembly; and it is very important to
uniformly distribute the brake force whether the functions of the brake pad guide plate and the brake caliper
floating pin are normal.

6.2.3 Disassemble drawings

6.2.3.1 Disassembly Diagram

5

4

1

3

2

6

8

7

9

NL06-1001b

1. Brake pad guide plate

2. brake pad

3. Brake caliper mounting bracket

4. Float pin sealing ring

5. Brake caliper

6. Steering joint

7. Disc-type brake anti-dust cover

8. Hub assembly

9 . Brake disc

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6.2.4 Diagnostic information and procedures

6.2.4.1 Brake pad inspection

1. Regularly inspect brake padand conduct measure according to the following figure. If it exceeds

specification, replace brake lining.

2. If replacement is unavoidable, it is necessary to replace disc brake padin accordance with complete set of

vehicle axle.

3 . Check if friction surface of disc- brake padis clack or damaged.

NL06-0003b

6.2.4.2 Brake caliper inspection

1. Inspect whether brake caliper has crack, serious abrasion and damage. If yes, replace brake caliper.

2. Inspect whether sealing ring of dust cover of brake caliper pistion has crack, breakage, gap, ageing and

wrong installation out of brake caliper body. If yes, replace brake caliper.

3. Inspect whether there is brake fluid leakage around brake caliper piston dustproof cover sealing ring and

from disc brake pad block, if yes, replace brake caliper.

4. Check whether the brake caliper piston can smoothly enter the brake caliper cylinder in full stroke. The brake

caliper piston shall be able to move smoothly and uniformly in the brake caliper cylinder. The brake caliper
needs to be replaced if the brake caliper piston is jammed or can hardly reach the bottom.

6.2.4.3 Brake pad guide plate inspection

Inspect whether brake pad guide piece is missing, has serious corrosion, or protruding tone bending due to
inspection.

If any of situations above ocurrs, it is necessary to replace disc brake pad guide piece. Ensure the brake pad
slides on the disc-type filler block guide blade smoothly, without retardation.

6.2.4.4 Brake caliper floating pin inspection

Check if brake caliper float pin exist condition as follow :

– Clamping stagnation

– Locked

– Sheath clack or damaged

– Sheath lack

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If any above situations are found, need to replace the brake caliper and dust cover seal ring.

6.2.4.5 Brake disc surface and wron n inspection

1. Clean brake disc friction surface by using industrial alcohol or allowed similar equivalent brake cleaning

agent.

2. Inspect whether brake disc friction surface has the following situations:

• Serious rust and/ or spot pitting

• Slight surface rusting

• Crack and / or burnings

• Serious decolor and turn into blue.

• Crack depth on brake disc friction surface

If the friction surface of the brake disc incurs the above on or more situations, the brake disc needs surface
dressing or replacement.

Notes:

After surface dressing or replacement of the brake disc, further replace the brake pad .

6.2.4.6 Brake disc thickness measure

NL06-0088b

1. Clean brake disc friction surface by using industrial alcohol or smilar brake cleaning agent.

2. Use micrometer to measure and record minimum thickness of 4 or more than 4 position points uniformly

distributed along the circumference of brake disc. Make sure that the measurement is only limited in brake
padand contact surface area, and the distance between micrometer and exterior edge of brake disc during
each measurement must be equal.

3. If thickness of brake disc exceeds specifications, brake disc needs to be repaired on its surface or replace.

Notes:

After surface dressing or replacement of the brake disc, further replace the brake pad .

6.2.4.7 End-face runout measure after brake disc installed

Notes:

When the brake disc is dismantled from the hub/axle flange, clean up rust or dirt on the matching surface of the
hub/axle flange and the brake disc; otherwise, it may result in oversized end face runout after the brake disc is

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assembled to result in brake pulsation.

NL06-0009b

1. For dismantling of brake disc from vehicle, refer to 6.2.5.3 Replacement of brake disc and/ or 6.3.5.3

Replacement of brake disc - rear.

2. Clean brake disc friction surface by using industrial alcohol or smilar brake cleaning agent.

3. Install brake disc onto wheel hub/ axle flange.

4. Install the nut with hand and tighten with a wrench.

5. Install the dial indicator base to the steering joint and put the dial indicator measurement head in place in

such a manner that the dial indicator measurement head is made to contact with the brake disc friction
surface at an angle of 90° and is about 13mm (metric) or 0.5in (English) from the external edge of the brake
disc.

6. Rotate the brake disc until the reading from the dial indicator reaches the minimum and then zero the dial

indicator.

7. Rotate the brake disc until reading from the dial indicator reaches the maximum.

8. Mark and record the disc side face run-out.

9. Compare the disc side face run-out with the value as specified.

Standard value : mm (Metric) in (English system)

10. If runout of rear end face exceeds stated specification after assembly of brake disc, it is necessary to inspect

bearing axial clearance and runout of axle wheel hub. If axial clearance and runout of axle wheel hub are
normal and brake disc thickness is within specified range, it is necesary to repair the surface of brake disc to
ensure correct levelness.

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