boot NISSAN PRIMERA 1999 Electronic Repair Manual

Pad Replacement
WARNING:
Clean brake pads with a vacuum dust collector to minimize
the hazard of airborne particles or other materials.
CAUTION:
lWhen cylinder body is open, do not depress brake pedal
because piston will pop out.
lBe careful not to damage piston boot or get oil on rotor.
Always replace shims when replacing pads.
lIf shims are rusted or show peeling of the rubber coat,
replace them with new shims.
lIt 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.
lBurnish the brake contact surfaces after refinishing or
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage.
Refer to ªBrake Burnishing Procedureº, ªCHECK AND
ADJUSTMENTº, BR-7.
NBR438
FRONT DISC BRAKE
BR-23

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 Ð Caliper
CYLINDER BODY
lCheck 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.
lMinor 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:
lWhen cylinder body is open, do not depress brake pedal
because piston will pop out.
lBe careful not to damage piston boot or get oil on rotor.
Always replace shims when replacing pads.
lIf shims are rusted or show peeling of the rubber coat,
replace them with new shims.
lIt 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.
lBurnish the brake contact surfaces after refinishing or
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage.
Refer to ªBrake Burnishing Procedureº, ªCHECK AND
ADJUSTMENTº, BR-7.
NBR439
FRONT DISC BRAKESR20DE - M/T
BR-26

Component
1. Cable guide
2. Cylinder
3. Toggle lever
4. Pin
5. Pin boot
6. Torque member
7. Inner shim
8. Inner pad
9. Outer pad
10. Outer shim11. Strut
12. O-ring
13. Push rod
14. Key plate
15. Retaining washer
16. Spring
17. Spring cover
18. Snap ring B
19. Piston seal
20. Snap ring A21. Washer
22. Wave washer
23. Washer
24. Bearing
25. Adjuster
26. Cup
27. Piston
28. Piston boot
29. Sleeve
Pad Replacement
WARNING:
Clean brake pads with a vacuum dust collector to minimize
the hazard of airborne particles or other materials.
CAUTION:
lWhen cylinder body is open, do not depress brake pedal
because piston will pop out.
lBe careful not to damage piston boot or get oil on rotor.
Always replace shims in replacing pads.
lIf shims are rusted or show peeling of rubber coat,
replace them with new shims.
NBR366
SEC. 440
Stopper bolt
10-12
(1.0-1.2,7-9)
31-38
(3.2 - 3.8, 23 - 28)
p1
22-32
(2.3 - 3.2,
17 - 23)
38-52
(3.9 - 5.3, 28 - 38)p10p9pPp8pP
p7
p6
p5p4pPto sliding portion
p12pR
p13pR
p14
p15
p16
p17p18
p28pR
: Do not re-use
: N´m (kg-m, ft-lb)
pR: Rubber grease point
pB: Brake fluid point
pP: PBC (Poly Butyl Cuprysil) grease
or silicone-based grease point
p23
p27pB
p26pRp25
p24pBp22p21p20
p19pR
p11pR
p3
p2
p29
REAR DISC BRAKE TYPE 1
BR-33

Pin and Pin Boot
Check for wear, cracks or other damage.
Replace if any of the above conditions are observed.
Rotor
Rubbing Surface
Check rotor for roughness, cracks or chips.
Runout
1. Secure rotor to wheel hub with two nuts (M12 x 1.25).
2. Check runout using a dial indicator.
Make sure that axial end play is within the specifications
before measuring. Refer to RA section (ªREAR WHEEL
BEARINGº, ªOn-vehicle Serviceº).
3. Change relative positions of rotor and wheel hub so that
runout is minimized.
Maximum runout:
0.07 mm (0.0028 in)
Thickness
Rotor repair limit:
Standard thickness
10 mm (0.39 in)
Minimum thickness
9 mm (0.35 in)
Thickness variation (At least 8 portions)
Maximum 0.02 mm (0.0008 in)
Assembly
1. Insert cam with depression facing towards open end of cyl-
inder.
2. Generously apply rubber grease to strut and push rod to
make insertion easy.
SBR219C
NBR367Sleeve Seal Cam
O-ring
Strut
pR
Push rod
Rubber grease
SBR248B
REAR DISC BRAKE TYPE 1
Inspection (Cont'd)
BR-37

7. Install cup adjuster, bearing, washers and snap ring A with a
suitable tool.
8. Insert piston seal into groove on cylinder body.
9. With piston boot fitted to piston, insert piston boot into groove
on cylinder body and fit piston by turning it clockwise with
long nose pliers, or suitable tool.
10. Fit toggle lever, return spring and cable guide.
11. Adjust the piston to the right angle as shown in the figure.
Installation
CAUTION:
lRefill with new brake fluid ªDOT 4º.
lNever reuse drained brake fluid.
1. Install caliper assembly.
lAs shown in the figure, align the piston's concave to the
pad's convex, then install the cylinder body to the torque
member.
2. Install brake hose to caliper securely.
3. Install all parts and secure all bolts.
4. Bleed air. Refer to ªBleeding Brake Systemº, BR-8
SBR755E Ring A
Washer
Wave washer
Washer
Ball bearing
Adjuster
Cup
Piston
SBR646
SBR767E Stopper boltReturn spring
Lever
NBR374 Alignment position of
disc pad's concave
Concave portion Piston Assembly
to the right
angle
NBR375 Concave portion
Convex portion
REAR DISC BRAKE TYPE 1
Assembly (Cont'd)
BR-39

Component
1. Cylinder body
2. Pin
3. Pin boot
4. Torque member5. Inner shim
6. Inner pad
7. OUter pad8. Outer shim
9. Bleed valve
10. Connecting bolt
NOTE:
The cylinder body cannot be disassembled.
Pad Replacement
WARNING:
Clean brake pads with a vacuum dust collector to minimize
the hazard of airborne particles or other materials.
CAUTION:
lWhen cylinder body is open, do not depress brake pedal
because piston will pop out.
lBe careful not to damage piston boot or get oil on rotor.
Always replace shims in replacing pads.
lIf shims are rusted or show peeling of rubber coat,
replace them with new shims.
lIt is not necessary to remove connecting bolt except for
replacement of caliper assembly. In this case, suspend
cylinder body with wire so as not to stretch brake hose.
lBurnish the brake contact surfaces after refinishing or
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage.
Refer to ªBrake Burnishing Procedureº, ªON-VEHICLE
SERVICEº, BR-7.
NBR440
REAR DISC BRAKE TYPE 2
BR-40

Removal
WARNING:
Clean brake pads with a vacuum dust collector to minimize
the hazard of airborne particles or other materials.
1. Remove brake cable lock spring.
2. Release parking brake control lever, then disconnect cable
from the caliper.
3. Remove torque member fixing bolts and connecting bolt.
4. Remove brake hose connecting bolt.
5. Plug off the brake hose and cylinder body to prevent air
entering the system.
CAUTION:
Care should be taken as not to let:
lAir enter the cylinder body and brake hose.
lBrake fluid spill from the cylinder body and brake hose.
Disassembly
Remove pin bolts and pins.
NOTE:
Cylinder body can not be disassembled.
Inspection
CALIPER
CAUTION:
Do not drain any brake fluid from cylinder body. Cylinder
body can not be disassembled.
Cylinder Body
Check cylinder body for score, rust, wear, damage or presence
of foreign materials. If any of the above conditions are observed,
replace cylinder body.
Torque Member
Check for wear, cracks or other damage. Replace if necessary.
Pin and Pin Boot
Check for wear, cracks or other damage.
Replace if any of the above conditions are observed.
NBR427
REAR DISC BRAKE TYPE 2
BR-42

Components
1. Boot
2. Piston
3. Piston cap
4. Spring
5. Wheel cylinder6. Shoe hold-down pin
7. Plug
8. Brake drum
9. Shoe hold-down spring
10. Adjuster11. Retainer ring
12. Return spring (Upper)
13. Return spring (Lower)
14. Spring
15. Toggle lever
Removal
WARNING:
Clean brake lining with a vacuum dust collector to minimize
the hazard of airborne materials.
CAUTION:
Make sure parking brake lever is completely released.
SBR616E
REAR DRUM BRAKE
BR-44

1. Release parking brake lever fully, then remove drum.
If drum is hard to remove, the following procedures
should be carried out.
a. Remove plug. To make shoe clearance, push shoe hold-
down spring to free toggle lever.
b. Install two bolts as shown. Tighten the two bolts gradu-
ally.
2. After removing retainer, remove spring by rotating shoes.
lBe careful not to damage wheel cylinder piston boots.
lBe careful not to damage parking brake cable when
separating it.
3. Remove adjuster.
4. Disconnect parking brake cable from toggle lever.
5. Remove retainer ring with a suitable tool. Then separate
toggle lever and brake shoe.
Inspection Ð Wheel Cylinder
lCheck wheel cylinder for leakage.
lCheck for wear, damage and loose conditions. Replace if any
such condition exists.
SBR617E
SBR020A
SBR214B
SBR329C
SBR330C
REAR DRUM BRAKE
Removal (Cont'd)
BR-45