Infiniti FX35, FX50 (S51). Manual — part 238
FRONT DISC BRAKE
BR-49
< REMOVAL AND INSTALLATION >
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WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
CAUTION:
Never depress the brake pedal. Brake fluid may splash while removing the brake hose and brake tube.
1.
Install disc rotor.
CAUTION:
Align the matching marks that have been made during removal when reusing the disc rotor.
2.
Install the brake caliper to the vehicle and tighten the caliper mounting bolts to the specified torque.
CAUTION:
Never spill or splash any grease and moisture on the caliper mounting face, threads, mounting
bolts and washers. Wipe out any grease and moisture.
3.
Tighten the flare nut to the specified torque with a flare nut crowfoot and a torque wrench.
CAUTION:
• Cover crowfoot with a cloth as not to damage the caliper.
• Never scratch the flare nut and the brake tube.
4.
Refill with new brake fluid and perform the air bleeding. Refer to
BR-11, "Bleeding Brake System"
.
CAUTION:
• Never reuse drained brake fluid.
• Never spill or splash brake fluid on the disc rotor and caliper.
5.
Check a drag of front disc brake. If any drag is found, refer to
BR-50, "BRAKE CALIPER ASSEMBLY (4
BRAKE CALIPER ASSEMBLY (4 PISTON TYPE) : Disassembly and Assembly
INFOID:0000000005234207
DISASSEMBLY
1.
Remove brake pads. Refer to
BR-41, "BRAKE PAD (4 PISTON TYPE) : Exploded View"
.
CAUTION:
Never drop brake pads, shims, pad pins and clips.
2.
Remove caliper assembly. Refer to
BR-47, "BRAKE CALIPER ASSEMBLY (4 PISTON TYPE) : Exploded
.
3.
Place a wooden block as shown in the figure, and blow air from
union bolt mounting hole to remove pistons and piston boots
and retaining rings.
CAUTION:
Never get fingers caught in the pistons.
4.
Remove piston seal (1) from cylinder body using suitable tool
(A).
CAUTION:
Be careful not to damage a cylinder inner wall.
ASSEMBLY
BRB0261D
JPFIA0217ZZ
BR-50
< REMOVAL AND INSTALLATION >
FRONT DISC BRAKE
1.
Apply brake fluid to piston seals (1), and install them to caliper.
CAUTION:
Never reuse piston seals.
2.
Apply rubber grease to piston boots (1). Cover the piston (2) end
with piston boots, and then install caliper side lip on piston boot
securely into a groove on caliper.
CAUTION:
Never reuse piston boots.
3.
Apply brake fluid to piston. Push piston into caliper by hand and
push piston boot piston-side lip into the piston groove.
CAUTION:
Press the piston evenly and vary the pressing point to pre-
vent caliper inner wall from being rubbed.
4.
Secure piston boot with retaining ring.
CAUTION:
• Make sure that boot is securely engaged in the groove on
caliper.
• Never reuse retaining ring.
5.
Install the caliper to tighten the caliper mounting bolts to the
specified torque. Refer to
BLY (4 PISTON TYPE) : Exploded View"
.
6.
Install brake pads. Refer to
.
CAUTION:
Never drop brake pads, shims, pad pins and clips.
BRAKE CALIPER ASSEMBLY (4 PISTON TYPE) : Inspection
INFOID:0000000005234208
INSPECTION AFTER DISASSEMBLY
Caliper
Check the inner wall of the caliper for rust, wear, cracks or damage. Replace the caliper if any abnormal con-
dition is detected.
CAUTION:
Always clean with new brake fluid. Never clean with mineral oil such as gasoline and light oil.
Pistons
Check the surface of the piston for rust, wear, cracks or damage. Replace the piston if any abnormal condition
is detected.
CAUTION:
A piston sliding surface is plated. Never polish with sandpaper.
INSPECTION AFTER INSTALLATION
1.
Check a drag of front disc brake. If any drag is found, follow the procedure described below.
2.
Remove brake pads.
3.
Press the pistons.
CAUTION:
• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid level in the reservoir tank because brake
fluid returns to master cylinder reservoir tank when pressing piston in.
NOTE:
JPFIA0218ZZ
PFIA0905J
FRONT DISC BRAKE
BR-51
< REMOVAL AND INSTALLATION >
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Use a disc brake piston tool to easily press piston.
4.
Install brake pads.
5.
Depress the brake pedal several times.
6.
Check a drag of front disc brake again. If any drag is found, disassemble the cylinder body. Refer to
49, "BRAKE CALIPER ASSEMBLY (4 PISTON TYPE) : Disassembly and Assembly"
.
7.
Burnish contact surface between disc rotor and brake pads after refinishing or replacing disc rotor, or if a
soft pedal occurs at very low mileage. Refer to
BR-52
< REMOVAL AND INSTALLATION >
REAR DISC BRAKE
REAR DISC BRAKE
BRAKE PAD (1 PISTON TYPE)
BRAKE PAD (1 PISTON TYPE) : Exploded View
INFOID:0000000005234209
BRAKE PAD (1 PISTON TYPE) : Removal and Installation
INFOID:0000000005234210
REMOVAL
WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
CAUTION:
• Never depress the brake pedal while removing the brake pads or the cylinder body because the pis-
ton may pop out.
• Never spill or splash brake fluid on the disc rotor.
1.
Remove tires with power tool.
2.
Remove the upper sliding pin bolt.
3.
Suspend the cylinder body with a wire so that the brake hose will not stretch. Remove the brake pads,
shims, shim cover and pad retainers from the torque member.
CAUTION:
• Never deform the pad retainers if removing the pad retainers.
• Never damage the piston boot.
• Never drop the brake pad, shims, and the shim cover.
• Remember each position of the removed brake pads.
INSTALLATION
WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
1.
Sliding pin bolt
2.
Cylinder body
3.
Inner shim cover
4.
Inner shim
5.
Inner pad (with pad wear sensor)*
6.
Pad retainer
7.
Torque member
8.
Outer pad
9.
Outer shim
*: Some vehicles has pad wear sensor only for one side.
1: Apply rubber grease.
2: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.
Refer to
for symbols not described on the above.
JPFIA0418GB
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