Nissan Primera P11. Instruction — part 37
Disassembly
WARNING:
Do not place your fingers in front of piston.
CAUTION:
Do not scratch or score cylinder wall.
1. Push out piston with dust seal with compressed air.
2. Remove piston seal with suitable tool.
Inspection — Caliper
CYLINDER BODY
●
Check inside surface of cylinder for score, rust, wear, dam-
age or presence of foreign materials. If any of the above
conditions are observed, replace cylinder body.
●
Minor damage from rust or foreign materials may be elimi-
nated by polishing surface with a fine emery paper. Replace
cylinder body if necessary.
CAUTION:
Use brake fluid to clean. Never use mineral oil.
PISTON
CAUTION:
Piston sliding surface is plated. Do not polish with emery
paper even if rust or foreign materials are stuck to sliding
surface.
Check piston for score, rust, wear, damage or presence of for-
eign materials. Replace if any of the above conditions are
observed.
SLIDE PIN, PIN BOLT AND PIN BOOT
Check for wear, cracks or other damage. Replace if any of the
above conditions are observed.
SBR772
FRONT DISC BRAKE
BR-25
Pad Replacement
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 “Brake Burnishing Procedure”, “CHECK AND
ADJUSTMENT”, BR-7.
NBR439
FRONT DISC BRAKE
SR20DE - M/T
BR-26
REMOVAL
1. Remove the housing retaining spring.
2. Wipe away any dirt from the guide pins between the torque
member and the cylinder body.
3. Pull out the protective caps from the guide sleeves.
4. Use a 7 - mm ALLEN key to unscrew the guide pins
from the torque member.
5. Partially remove the guide pins from the guide sleeve.
6. Pull the cylinder body instructionly towards the outer side of the
vehicle so that the piston is slightly pressed back.
7. Remove the cylinder body and hang it on a wire in the wheel
arch in a suitable position.
Make sure there is no strain on the brake hose piping.
8. Remove the brake pad on the piston side from the piston.
9. Remove the second brake pad from the torque member.
NBR292
Spring
Cylinder body
Torque member lug
.
Torque member lug
Locating
holes
NBR300
Protective
caps
NBR290
Wire
Spring
FRONT DISC BRAKE
SR20DE - M/T
Pad Replacement (Cont’d)
BR-27
CAUTION:
Do not use any sharp tools or cleaning agents which con-
tains mineral oil. Damage to the installation can occur.
10. Clean the cylinder body and guide grooves in the torque
member.
11. Check the dust cover and guide sleeves for damage.
12. Measure the amount of wear on the brake pad
Standard pad thickness:
11 mm (0.43 in)
Pad wear limit:
2.0 mm (0.079 in)
14. Press the piston fully back with a suitable tool.
CAUTION:
Carefully monitor brake fluid level to avoid brake fluid from
returning to the reservoir when pushing back the piston.
Installation
1. Install the brake pad with a three-pronged retaining spring
into the piston.
2. Place the second brake pad into the guide groove of the
torque member on the outer side of the brake disc.
3. Place the cylinder body with the installed brake pad over the
brake disc and the second brake pad.
4. Tighten the guide pins with a 7 - mm Allen key.
5. Press back the protective caps into the guides sleeve.
NBR303
Wire
Cylinder body
Torque
member
Guide groove
Second brake pad
Three-pronged
brake pad
Piston
Guide pins
25 - 30
(2.5 - 3.1,
18 - 22)
Protective caps
.
N·m (kg-m, ft-lb)
NBR299
FRONT DISC BRAKE
SR20DE - M/T
Pad Replacement (Cont’d)
BR-28
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