Nissan Primera P12. Instruction — part 121
FRONT DISC BRAKE
BR-23
C
D
E
G
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B
BR
FRONT DISC BRAKE
PFP:41000
Component
EFS002V8
WARNING:
●
Clean brake pads with a vacuum dust collector to minimize the hazard of airborne particles or
other materials.
CAUTION:
●
When cylinder body is open, do not depress brake pedal because piston will pop out.
●
Be careful not to damage piston boot or get oil on rotor. Always replace shims when replacing
pads.
●
If shims are rusted or show peeling of the rubber coat, replace them with new shims.
●
It is not necessary to remove connecting bolt except for disassembly or replacement of caliper
assembly. In this case, suspend cylinder body with wire so as not to stretch brake hose.
●
Burnish the brake contact surfaces after refinishing or replacing rotors, after replacing pads, or if
a soft pedal occurs at very low mileage. Refer to
BR-27, "BRAKE BURNISHING PROCEDURE"
.
Inspection
EFS002V9
PAD THICKNESS
Check pad thickness by lifting vehicle, removing the wheel, and look-
ing through check hole on cylinder body. If necessary, use a scale.
SFIA0480E
1.
Main pin
2.
Pin boot
3.
Torque member fixing bolt
4.
Torque member
5.
Inner shim
6.
Inner pad
7.
Pad retainer
8.
Outer pad
9.
Outer shim
10. Connecting bolt
11. Copper washer
12. Main pin bolt
13. Bleed valve
14. Cylinder body
15. Piston seal
16. Piston
17. Piston boot
Standard pad thickness
: 11 mm (0.43 in)
Pad wear limit
: 2.0 mm (0.079 in)
BRA0010D
BR-24
FRONT DISC BRAKE
Pad Replacement
EFS002VA
REMOVAL
CAUTION:
When replacing brake pads, always replace inner shims, outer shims, and shim covers as a set.
1.
Remove master cylinder reservoir tank cap.
2.
Remove lower sliding pin bolt.
3.
Hang cylinder body with a wire, and remove pads, pad retainers,
shims and pad return springs.
INSTALLATION
1.
Apply brake grease on back of the pad and both sides of the shim. Install inner shim and inner shim cover
to inner pad, outer shim to outer pad.
2.
Apply brake grease on the pad retainer pad contact surface. Install pad retainers, pads and pad return
springs to the torque member.
3.
Connect cylinder body to the torque member.
CAUTION:
When replacing pads with new ones, press piston in until the pads can be installed. Carefully mon-
itor brake master cylinder reservoir fluid level. Brake fluid will return, raising master cylinder res-
ervoir tank fluid level.
4.
Insert lower sliding pin bolt and tighten to the specified torque.
5.
Check brakes for drag.
Caliper Removal and Installation
EFS002VB
REMOVAL
1.
Connect a vinyl tube to the air bleeder.
2.
Drain brake fluid gradually from air bleeder while depressing brake pedal.
3.
Remove union bolts and torque member mounting bolts, and
remove caliper assembly.
4.
Remove disc rotor.
SBR976B
SBR932C
SFIA0478E
FRONT DISC BRAKE
BR-25
C
D
E
G
H
I
J
K
L
M
A
B
BR
INSTALLATION
CAUTION:
●
Refill with new brake fluid “DOT 3” or “DOT 4”.
●
Never reuse drained brake fluid.
1.
Install disc rotor.
2.
Install caliper assembly. Tighten mounting bolts to the specified torque.
CAUTION:
Before installing caliper assembly, wipe oil and grease on the trailing arm washer seats and cali-
per assembly mounting surface.
3.
Connect brake hose to caliper assembly and tighten union bolts to the specified torque.
CAUTION:
●
Do not reuse the copper washer for union bolts.
●
Securely assemble brake hose to protrusions on cylinder body.
4.
Bleed air. Refer to
BR-10, "Bleeding Brake System"
.
Caliper Disassembly and Assembly
EFS002VC
DISASSEMBLY
WARNING:
Do not place your fingers in front of piston.
CAUTION:
Do not scratch or score cylinder wall.
1.
Push out piston with piston boot with compressed.
2.
Remove piston seal with a suitable tool.
INSPECTION AFTER DISASSEMBLY
Cylinder Body
CAUTION:
Use new brake fluid to clean. Never use mineral oils such as gasoline or kerosene.
●
Check cylinder inner wall for corrosion, wear and damage. If corrosion, wear or damage is detected,
replace the cylinder body.
●
Minor flaws caused by corrosion or foreign material can be removed by polishing the surface with fine
sandpaper. Replace the cylinder body, if necessary.
Torque Member
Check for wear, cracks and damage. If wear, cracks or damage is detected, replace the applicable part.
Piston
CAUTION:
The piston sliding surface is plated. Do not polish with sandpaper.
Check piston surface for corrosion, wear and damage. If corrosion, wear or damage is detected, replace the
applicable part.
Sliding Pin, Pin Bolt, and Pin Boot
Check sliding pin and sliding pin boot for wear, damage and cracks. If corrosion, wear or damage is detected,
replace the applicable part.
DISC ROTOR INSPECTION
Visual Inspection
Check surface of the disc rotor for uneven wear, cracks and serious damage. If uneven wear, cracks or seri-
ous damage is detected, replace it.
SBR772
BR-26
FRONT DISC BRAKE
Run Out Inspection
1.
Using wheel nuts, fix the disc rotor to the wheels hub. (2 or more positions)
2.
Using a dial indicator, check run out.
CAUTION:
Before measuring, make sure that the axle endplay is 0 mm
(0 in).
3.
If the run out is outside the limit, find the minimum run out point
by shifting the mounting positions of the disc rotor and wheel hub by one hole.
Thickness Inspection
Using a micrometer, check thickness of the disc rotor. If the thick-
ness is outside the standard, replace the disc rotor.
ASSEMBLY
CAUTION:
When assembling, do not use rubber grease.
1.
Apply rubber lubricant to piston seals, and install them to cylin-
der body.
CAUTION:
Do not reuse piston seals.
2.
Apply brake fluid or rubber lubricant to piston boots. Cover pis-
ton end with piston boot. Install cylinder side lip on piston boot
properly into groove on cylinder body.
CAUTION:
Do not reuse piston boot.
Measurement point:
At a point 10 mm (0.39 in) from the outer edge of the
disc.
Run out limit:
0.07 mm (0.0028 in) or less
BRA0013D
Standard thickness
: 28.0 mm (1.102 in)
Wear limit
: 26.0 mm (1.024 in)
Maximum uneven wear (measured at 8 positions):
0.02 mm (0.0008 in) or less
SBR020B
SFIA0156E
SFIA0157E
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