NISSAN LATIO 2009 Service Repair Manual

BRAKE BOOSTER
BR-21
< SERVICE INFORMATION >
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Removal and Installation
INFOID:0000000004305905
REMOVAL CAUTION:
• Be careful not to splash brake fluid on painte d areas such as body. It may cause paint damage. If
brake fluid is splashed on painte d surfaces of body, wipe them with cloth immediately and then wash
it away with water.
• Be careful not to deform or bend brake tub es while removing and installing brake booster.
• Replace clevis pin if it is damaged.
• Be careful not to damage brake booster stud bolt thr eads. If brake booster is tilted or inclined during
installation, dash panel may damage the threads.
1. Remove vacuum hose from brake booster.
2. Remove master cylinder assembly. Refer to BR-15, " Removal and Installation " .
3. Remove snap pin and clevis pin on the clevis of the brake booster, and disconnect the input rod from the brake pedal. 1. Reservoir tank 2. Master cylinder 3. Brake booster
4. Clevis 5. Spacer 6. Gasket Up AWFIA0530GB
SFIA2044E

Inspection and Adjustment " .
7. Tighten lock nut of input rod to the specified torque.
8. Install vacuum hose into brake booster. Refer to BR-23, " Removal and Installation " .
9. Bleed the air from the brake hydraulic system. Refer to BR-9, " Bleeding Brake System " .
Input rod length (B) : Refer to
BR-40, " Brake Booster " .

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VACUUM LINES
Component INFOID:0000000004305906
Removal and Installation INFOID:0000000004305907
REMOVAL 1. Disconnect the vacuum hose from the intake manifold.
2. Disconnect the vacuum hose from the brake booster.
3. Disconnect the vacuum hose from the clip and re move the vacuum hose and vacuum tube assembly.
INSTALLATION Installation is in the reverse order of removal.
CAUTION:
• Because the vacuum hose at the intake manifold contai ns a built-in check valve, it must be installed
in the correct orientation. Refer to the stamp or label to confirm correct installation orientation.
Brake booster will not operate normally if ho se is installed in the reverse orientation.
• Insert vacuum hose at least 24 mm (0.94 in) on to the vacuum tube and vacuum fittings on the brake booster and intake
manifold as shown.
• Never use lubricating oil during assembly.
Inspection INFOID:0000000004305908
VISUAL INSPECTION Check for improper installation, damage and deterioration. Replace parts as necessary.
CHECK VALVE INSPECTION 1. Hose clamp 2. Engine side indicator stamp (for
built-in check valve orientation)3. Vacuum hose
4. Clip 5. Clip position stamp 6. Vacuum tube
A. To intake manifold B. To brake booster SBR225B

" Check Valve " .
When connected to engine side (2) : Refer to BR-39, " Check Valve " .

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FRONT DISC BRAKE
On Board Inspection INFOID:0000000004305909
PAD WEAR INSPECTION • Check pad thickness from check hole on cylinder body.
Component INFOID:0000000004305910
AD22VK
Standard thickness : Refer to
BR-40, " Front
Disc Brake " .
Repair limit thickness : Refer to BR-40, " Front
Disc Brake " .
AWFIA0526ZZ

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3. Hang cylinder body with a wire, and remove pad return spring,
pads, shims and pad retainers from torque member.
CAUTION:
When removing pad retainer from torque member, lift pad
retainer in the direction shown by arrow, so as not to
deform it.
Installation 1. Apply PBC (Poly Butyl Cuprysil) grease or silicone- based grease to the shims. Install shims to pads.
CAUTION:
Securely install shims according to mounting direction of pads.
2. Install pad retainers, pad return spring, shims and pads to the torque member. CAUTION:
• When installing pad retainer, at tach it firmly so that it is
not lifted up from torque member, as shown.
3. Install cylinder body to torque member. CAUTION:
Check the brake fluid level in the reservoir tank for fluid level because brake fluid returns to mas-
ter cylinder reservoir tank when pressing piston in.
NOTE:
Use a disc brake piston tool (commercial se rvice tool) to easily press to piston in.
4. Install lower sliding pin bolt (lower side), and tighten it to the specified torque. Refer to BR-25, " Compo-
nent " .
5. Check brakes for drag.
6. Install front wheel and tire. Refer to WT-7, " Rotation " .
CLZ25VF
Removal 1. Remove the front wheel and tire using power tool.
2. Remove sliding pin bolt (lower side).
3. Hang cylinder body with a wire, and remove pads, shims and pad retainers from torque member.
CAUTION:
When removing pad retainer from torque member, lift pad
retainer in the direction shown by arrow, so as not to
deform it.
Installation SBR556E

Compo-
nent " .
5. Check brake for drag.
6. Install the front wheel and tire. Refer to WT-7, " Rotation " .
Removal and Installation of Brake Caliper Assembly INFOID:0000000004305912
REMOVAL
1. Remove front wheel and tire.
2. Secure the disc rotor using wheel nuts. CAUTION:
Put matching marks on wheel hub assembly and disc rotor,
if it is necessary to remove the disc rotor.
3. Drain brake fluid. Refer to BR-9, " Drain and Refill " .
4. Remove the union bolt (A) and discard the copper washers. Remove the brake hose from the cylinder body.
• Protusions (B)
CAUTION:
Do not reuse the copper washers AWFIA0502ZZ

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5. Remove the torque member bolts and remove the cylinder body
and torque member as an assembly.
INSTALLATION 1. Install the torque member and cylinder body as an assembly and tighten the torque member bolts to the specified torque.
Refer to BR-25, " Component " .
CAUTION:
Before installing torque member to vehicle, wipe oil and
grease on mounting surface of steering knuckle and torque
member.
2. Install the brake hose to caliper assembly with new copper washers. Align the brake hose tab between the protusions (B)
on the cylinder body as shown. Tighten the union bolt (A) to the
specified torque. Refer to BR-11, " Hydraulic Circuit " .
CAUTION:
Do not reuse the copper washers
3. Refill with new brake fluid and bleed air. Refer to BR-9, " Bleeding Brake System " .
4. Check front disc brake for drag.
5. Install front wheel and tire. Refer to WT-7, " Rotation " .
Disassembly and Assembly of Brake Caliper Assembly INFOID:0000000004305913
DISASSEMBLY 1. Remove the caliper assembly. Refer to BR-28, " Removal and Installation of Brake Caliper Assembly " .AWFIA0502ZZ
SFIA1137E

BR-30< SERVICE INFORMATION >
FRONT DISC BRAKE
2. Remove sliding pin bolts and remove cylinder body from the torque member. Remove pads, shims, pad return spring
(AD22VK) and pad retainers from torque member as necessary.
CAUTION:
When removing pad retainer fr om torque member, lift the
pad retainer in the direction shown by arrow, so as not to
deform it.
3. Remove sliding pins and sliding pin boots from torque member.
4. Place a wooden block as shown, and blow air from union bolt mounting hole to remove piston and piston boot.
CAUTION:
Do not get fingers caught in the piston.
5. Remove piston seal with a flat-bladed screwdriver. CAUTION:
Be careful not to damage the inner wall of cylinder.
INSPECTION AFTER DISASSEMBLY
Cylinder Body
Check the inner wall of cylinder for corrosion, w ear, and damage. Replace cylinder body as necessary.
CAUTION:
Clean cylinder body using new brake fluid. Never use mineral oils such as gasoline or kerosene.
Torque Member
Check for wear, cracks, and damage. R eplace torque member as necessary.
Piston
Check piston surface for corrosion, wear, and damage. Replace piston as necessary.
CAUTION:
The piston sliding surface is plated . Do not polish with sandpaper.
Sliding Pin, Sliding Pin Bolt, and Sliding Pin Boot
Check sliding pins, sliding pin bolts and sliding pin boots for wear, damage, and cracks. Replace applicable
part as necessary.
DISC ROTOR INSPECTION
Visual Inspection
Check surfaces of disc rotor for uneven wear, cr acks, and serious damage. Replace as necessary.
Runout Inspection
1. Using wheel nuts, secure disc rotor to wheels hub at two or more positions. SBR556E
WFIA0525E
SFIA2277E