Nissan Terrano r20e. Manual — part 57
Removal and Installation
Refer to EM section, “VACUUM PUMP — Removal and Installa-
tion”.
VACUUM PUMP (ZD30DDTi engine model)
BR-25
PRE
CAUTION:
Clean all brake assembly parts with a vacuum dust collector
to prevent particles from spreading through work area.
Pad Replacement
1. Loosen brake fluid reservoir cap.
2. Remove lower pin bolt.
YBR297
SBR081A
FRONT DISC BRAKE
BR-26
3. Swing cylinder body upward. Then remove pad and anti-noise
shims.
CAUTION:
I
When cylinder body is swung up, do not depress brake
pedal because piston will pop out.
I
Ensure that brake fluid does not come into contact with
dustcover and rotor.
I
Be careful not to twist brake hoses.
Brake pad thickness (new):
10 mm (0.39 in)
Wear limit (min. thickness):
2 mm (0.08 in)
I
After installing new brake pads, check brake fluid level at
brake fluid reservoir.
Removal
I
Remove torque member fixing bolts and union bolt.
Disassembly
Push out piston with dust cover with compressed air.
Use a wooden block so that the 2 pistons come out evenly.
CAUTION:
I
Wear protecting clothes and safety goggles.
I
Do not hold your fingers in front of the pistons.
I
Be careful not to scratch piston and/or cylinder faces.
Inspection
INSPECTION OF BRAKE DRAG FORCE
“Residual pair” describes the friction pressure of the disc brake
shoes against the disc when the brake pedal is not applied.
1. Swing cylinder body upward.
2. Make sure that wheel bearing is adjusted properly. Refer to
section FA.
3. Measure rotating force (F
1
).
NBR207
SBR012C
SBR085A
SBR168A
FRONT DISC BRAKE
Pad Replacement (Cont’d)
BR-27
4. Install caliper with pads to the original position.
5. Depress brake pedal for 5 seconds.
6. Release brake pedal, rotate disc rotor 10 revolutions.
7. Measure rotating force (F
2
).
8. Calculate brake drag force by subtracting F
1
from F
2
.
Maximum brake drag force (F
2
— F
1
):
103.0 N (10.5 kg, 23.2 lb)
If it is not within specification, check pins and pin boots in
caliper.
I
Make sure that wheel bearing is adjusted properly.
I
Disc pads and disc rotor must be dry.
DISC PAD
Check disc pad for wear or damage.
Pad wear limit (A):
2.0 mm (0.079 in)
Assembly
Fit new piston seals.
Lightly apply clean brake fluid “DOT 4” to piston outer face.
1. Insert piston seal into groove on cylinder body.
2. Install piston into cylinder body.
3. Install piston boot and secure properly.
Inspection
CYLINDER BODY
I
Check inside surface of cylinder for score, rust, wear, damage
or presence of foreign materials. If any of the above conditions
are observed, replace cylinder body.
I
Minor damage from rust or foreign materials may be eliminated
by polishing the surface with a fine emery paper. Replace cyl-
inder body if necessary.
CAUTION:
Use brake fluid to clean. Never use mineral oil.
SBR130A
SBR041A
SMA364A
NBR007
SBR574
FRONT DISC BRAKE
Inspection (Cont’d)
BR-28
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