NISSAN PATROL 1998 Y61 / 5.G Brake System Owner's Manual

REMOVAL AND INSTALLATION
CAUTION:
When installing vacuum hoses, pay attention to the following
points.
+Do not apply any oil or lubricants to vacuum hose and
check valve.
+ Insert vacuum tube into vacuum hose as shown.
+ Install check valve, paying attention to its direction.
INSPECTION
Hoses and connectors
Check vacuum lines, connections and check valve for airtightness,
improper attachment cha®ng and deterioration.
Check valve
Check vacuum with a vacuum pump.
Connect to booster
side Vacuum should exist.
Connect to engine
side Vacuum should not exist.
Vacuum warning switch*
Test continuity through vacuum warning switch with an ohmme-
ter and vacuum pump.
VacuumLess than 26.7 kPa
(267 mbar, 200 mmHg, 7.87 inHg) 0
W
33.3 kPa
(333 mbar, 250 mmHg, 9.84 inHg) or more ¥W
* Diesel engine models except Australia
SBR454D
SBR844B
SBR321E
VACUUM PIPING
BR-19

Removal and Installation
1. Rotate crankshaft so intake cam nose for No. 1 cylinder facesstraight up when viewed through oil ®ller cap mounting hole.
2. Rotate crankshaft approximately 240É counterclockwise.
3. Remove vacuum pump.
CAUTION: Loosen mounting nuts equally and gradually.
Always remove mounting nuts by pushing to keep the
vacuum pump from jumping up.
Do not disassemble vacuum pump.
4. Install the vacuum pump in the location from which it was removed with cam nose set in position.
SBR319E
RD28 engine models
Vacuum pump
17 - 22 (1.7 - 2.2 kg-m, 12 - 16 ft-lb)
Rocker cover gasket
Rocker cover
VACUUM PUMP
BR-20

Pad Replacement
WARNING:
Clean brakes with a vacuum dust collector to minimize the
hazard of airborne particles or other materials.
CAUTION:
+When cylinder body is removed, do not depress brake
pedal, or 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.
+ Carefully monitor brake ¯uid level because brake ¯uid will
return to reservoir when pushing back piston.
+ Always remove pad retainer in the direction of the arrow.
Failure to do so will damage pawl areas, causing pad
retainer to be unsuitable for further use.
1. Remove master cylinder reservoir cap.
2. Remove upper and lower pin bolts.
3. Remove cylinder body from torque member. Then remove pads, pad retainers, and inner and outer shims.Standard pad thickness: 12.0 mm (0.472 in)
Pad wear limit: 2.0 mm (0.079 in)
Carefully monitor brake ¯uid level because brake ¯uid will
return to reservoir when pushing back piston.
SBR171E
SBR172E
FRONT DISC BRAKE
BR-21

j1Main pin
j
2Pin boot
j
3Shim cover
j
4Inner shim
j
5Inner pad
j
6Torque member ®xing bolt j
7Washer
j
8Torque member
j
9Outer pad
j
10Outer shim
j
11Pad retainer
j
12Connecting bolt j
13Copper washer
j
14Main pin bolt
j
15Cylinder body
j
16Piston seal
j
17Piston
j
18Piston boot
SBR173E
FRONT DISC BRAKE
BR-22

Removal
WARNING:
Clean brake pads with a vacuum dust collector to minimize the
hazard of airborne particles or other materials.
CAUTION:
Suspend caliper assembly with wire so as not to stretch brake
hose.
Remove torque member ®xing bolts and connecting bolt.
It is not necessary to remove connecting bolt except for dis-
assembly or replacement of caliper assembly. In this case,
suspend caliper assembly with wire so as not to stretch brake
hose.
Disassembly
WARNING:
Do not place your ®ngers 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 a suitable tool.
Inspection Ð Caliper
CYLINDER BODY
+Check inside surface of cylinder for score, rust, wear, damage
or presence of foreign objects. If any of the above conditions
are observed, replace cylinder body.
+ Minor damage from rust or foreign objects may be eliminated
by polishing surface with a ®ne emery paper. Replace cylinder
body if necessary.
CAUTION:
Use brake ¯uid to clean. Never use mineral oil.
PISTON
Check piston for score, rust, wear, damage or presence of foreign
objects. Replace if any of the above conditions are observed.
CAUTION:
Piston sliding surface is plated. Do not polish with emery
paper even if rust or foreign objects are stuck to sliding sur-
face.
SLIDE PIN, PIN BOLT AND PIN BOOT
Check for wear, cracks, rust or other damage. Replace if any of the
above conditions are observed.
SBR174E
SBR085A
FRONT DISC BRAKE
BR-23

Inspection Ð Rotor
RUNOUT
1. Secure rotor to wheel hub with at least two nuts (M12 ý 1.25).
2. Check runout using a dial indicator.
Make sure that wheel bearing axial end play is within the
speci®cations before measuring. Refer to FA section (``Front
Wheel Bearing'', ``ON-VEHICLE SERVICE'').Maximum runout:0.1 mm (0.004 in)
3. If the runout is out of speci®cation, ®nd minimum runout posi- tion as follows:
a. Remove nuts and rotor from wheel hub.
b. Shift the rotor one hole and secure rotor to wheel hub withnuts.
c. Measure runout.
d. Repeat steps a. to c. so that minimum runout position can be found.
4. If the runout is still out of speci®cation, turn rotor with on-car brake lathe (``MAD, DL-8700'', ``AMMCO 700 and 705'' or
equivalent).
THICKNESS
Thickness variation (At least 8 positions): Maximum 0.015 mm (0.0006 in)
If thickness variation exceeds the speci®cation, turn rotor with on-
car brake lathe. Rotor repair limit:30.0 mm (1.181 in)
Assembly
1. Insert piston seal into groove on cylinder body.
2. With piston boot ®tted to piston, insert piston boot into grooveon cylinder body and install piston.
3. Properly secure piston boot
CAUTION:
Secure dust seal properly.
Installation
CAUTION:
+ Re®ll with new brake ¯uid ``DOT 3''.
+ Never reuse drained brake ¯uid.
1. Install caliper assembly.
2. Install brake hose to caliper securely.
3. Install all parts and secure all bolts.
4. Bleed air. Refer to ``Bleeding Brake System'', BR-4.
SBR019B
SBR020B
SBR574
SBR175E
FRONT DISC BRAKE
BR-24

Pad Replacement
WARNING:
Clean brakes 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,
or 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.
+ Carefully monitor brake ¯uid level because brake ¯uid will
return to reservoir when pushing back piston.
1. Remove master cylinder reservoir cap.
2. Remove lower pin bolt.
3. Open cylinder body upward. Then remove pad retainers, and inner and outer shims.Standard pad thickness: 10.0 mm (0.394 in)
Pad wear limit: 2.0 mm (0.079 in)
Carefully monitor brake ¯uid level because brake ¯uid will
return to reservoir when pushing back piston.
SBR181E
REAR DISC BRAKE
BR-25

j1Main pin
j
2Pin boot
j
3Shim cover
j
4Inner shim
j
5Inner pad
j
6Torque member ®xing bolt j
7Washer
j
8Torque member
j
9Outer pad
j
10Outer shim
j
11Pad retainer
j
12Connecting bolt j
13Copper washer
j
14Main pin bolt
j
15Cylinder body
j
16Piston seal
j
17Piston
j
18Piston boot
SBR182E
REAR DISC BRAKE
BR-26

Removal
WARNING:
Clean brake pads with a vacuum dust collector to minimize the
hazard of airborne particles or other materials.
CAUTION:
Suspend caliper assembly with wire so as not to stretch brake
hose.
Remove torque member ®xing bolts and connecting bolt.
It is not necessary to remove connecting bolt except for dis-
assembly or replacement of caliper assembly. In this case,
suspend caliper assembly with wire so as not to stretch brake
hose.
Disassembly
WARNING:
Do not place your ®ngers 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 a suitable tool.
Inspection Ð Caliper
CYLINDER BODY
+Check inside surface of cylinder for score, rust, wear, damage
or presence of foreign objects. If any of the above conditions
are observed, replace cylinder body.
+ Minor damage from rust or foreign objects may be eliminated
by polishing surface with a ®ne emery paper. Replace cylinder
body if necessary.
CAUTION:
Use brake ¯uid to clean. Never use mineral oil.
PISTON
Check piston for score, rust, wear, damage or presence of foreign
objects. Replace if any of the above conditions are observed.
CAUTION:
Piston sliding surface is plated. Do not polish with emery
paper even if rust or foreign objects are stuck to sliding sur-
face.
SLIDE PIN, PIN BOLT AND PIN BOOT
Check for wear, cracks, rust or other damage. Replace if any of the
above conditions are observed.
SBR183E
SBR772
REAR DISC BRAKE
BR-27

Inspection Ð Rotor
RUNOUT
1. Secure rotor to wheel hub with at least two nuts (M12 ý 1.25).
2. Check runout using a dial indicator.
Make sure that wheel bearing axial end play is within the
speci®cations before measuring. Refer to ``Rear Wheel Bear-
ing'' in RA section.Maximum runout:0.1 mm (0.004 in)
3. If the runout is out of speci®cation, ®nd minimum runout posi- tion as follows:
a. Remove nuts and rotor from wheel hub.
b. Shift the rotor one hole and secure rotor to wheel hub withnuts.
c. Measure runout.
d. Repeat steps a. to c. so that minimum runout position can be found.
4. If the runout is still out of speci®cation, turn rotor with on-car brake lathe (``MAD, DL-8700'', ``AMMCO 700 and 705'' or
equivalent).
THICKNESS
Thickness variation (At least 8 positions): Maximum 0.015 mm (0.0006 in)
If thickness variation exceeds the speci®cation, turn rotor with on-
car brake lathe. Rotor repair limit:16.0 mm (0.630 in)
Assembly
1. Insert piston seal into groove on cylinder body.
2. With piston boot ®tted to piston, insert piston boot into grooveon cylinder body and install piston.
3. Properly secure piston boot
Installation
CAUTION:
+ Re®ll with new brake ¯uid ``DOT 3''.
+ Never reuse drained brake ¯uid.
1. Install caliper assembly.
2. Install brake hose to caliper securely.
3. Install all parts and secure all bolts.
4. Bleed air. Refer to ``Bleeding Brake System'', BR-4.
SBR389A
SBR390A
SBR574
SBR184E
REAR DISC BRAKE
BR-28