Disc & Drum Nissan Stanza III

DESCRIPTION

All brake systems are operated hydraulically using a tandem master cylinder and vacuum power unit. All models have front disc brakes. Rear brakes are either drum or disc. Pathfinder SE and 300ZX use rear disc brake with internal parking brake in rotor. On Maxima, Pathfinder and Pickup, a Load-Sensing Proportioning Valve (LSV) is used to regulate rear brake pressure.

BLEEDING PROCEDURES

Note. Check fluid level in master cylinder frequently during bleeding procedure.

Bleed brake system in proper sequence. Refer to the BRAKE LINE BLEEDING SEQUENCE .

BRAKE LINE BLEEDING SEQUENCE

Adjustment

1. Attach a hand-held vacuum pump to power brake unit supply port. (Scheme 1) Apply 20-in. Hg vacuum to power brake unit. Measure length of output rod extending from power brake unit housing.
2. See «POWER BRAKE UNIT OUTPUT ROD LENGTH SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum). Adjust output rod length if necessary. If output rode length cannot be adjusted properly, replace power brake unit.

Scheme 1

POWER BRAKE UNIT OUTPUT ROD LENGTH SPECIFICATIONS

1. Measure pedal height from pressure face of pedal pad to floor pan insulator, without carpet. See BRAKE PEDAL HEIGHT SPECIFICATIONS table.
2. To adjust to pedal height, loosen brake booster input rod lock nut, and rotate input rod to attain proper height. Tighten lock nut, and adjust stoplight switch. Ensure pedal free play is .04-.12" (1-3 mm).

BRAKE PEDAL HEIGHT SPECIFICATIONS

LOAD-SENSING PROPORTIONING VALVE (LSV)

Note. If pressure cannot be adjusted to specifications, replace entire valve assembly.

Pressure Adjustment (Maxima)

1. With one person inside vehicle, set rear axle load to 1323 lbs. (595 kg) with weight in trunk. Using 2 pressure gauges, attach one to front brake bleeder and one to rear brake bleeder. Bleed air from front and rear bleeders.
2. Depress brake pedal until front brake pressure reading is 711 psi (50 kg/cm 2 ). Check rear brake pressure. See LSV PRESSURE SPECIFICATIONS table. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Check rear brake pressure. Refer to LSV PRESSURE SPECIFICATIONS table. CAUTION: Check rear brake pressure 2 seconds after front brake pressure reaches specified value.
3. If readings are not as indicated, adjust sensor spring length by turning adjusting bolt. (Scheme 2) Repeat test, and recheck pressure. If pressure cannot be adjusted to specification, replace dual LSV assembly.

LSV PRESSURE SPECIFICATIONS

Scheme 2

Pressure Adjustment (Pathfinder & Pickup)

1. Ensure vehicle is in unladen condition. Have one person sit in driver's seat. To stabilize suspension deflection, have one person sit on rear of vehicle, and then get out of vehicle slowly.
2. Attach a lever to LSV stopper bolt. (Scheme 3) Adjust spring length to about 7.44" (189 mm). Using 2 pressure gauges, attach one to front brake bleeder and one to rear brake bleeder.
3. Bleed air from front and rear bleeders. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Check rear brake pressure. See LSV PRESSURE SPECIFICATIONS table.
4. Slowly set a 221-lb. (100 kg) weight on rear of vehicle by axle center. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Ensure rear brake pressure reading is as specified. See LSV PRESSURE SPECIFICATIONS table. If pressure readings are not as specified, adjust spring bracket. (Scheme 3) Repeat test.

Scheme 3

PARKING BRAKE

Note. For rear drum-in-disc brake type on Pathfinder and 300ZX, adjust parking brake shoe clearance before adjusting parking brake control. See PARKING BRAKE SHOES .

Adjustment (Except Pathfinder & Pickup)

1. Remove parking brake lever cover. Raise and support rear of vehicle. Pull up on parking brake lever using force of 44 lbs. (20 kg). Rear wheels should lock at appropriate lever stroke. Refer to «PARKING BRAKE LEVER STROKE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. Adjust parking brake using adjusting nut located beside or below parking brake lever. After releasing lever, ensure rear wheels rotate freely, and no slack should be present at rear cables.

PARKING BRAKE LEVER STROKE SPECIFICATIONS

Adjustment (Pathfinder & Pickup With Rear Drum Brake)

1. Raise and support rear of vehicle. Apply parking brake with 44-lb. (20 kg) force. Check lever stroke. Refer to the «PARKING BRAKE LEVER STROKE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. Use adjusting nut to adjust equalizer link until rear wheels are locked. Release parking brake. Ensure rear wheels turn freely. After adjustment, brakes should operate smoothly without noise or drag.

1. Set shoe adjustment assembly so clearance between brake drum inside diameter and brake shoes outside diameter is as specified. See «BRAKE SHOE INSTALLATION CLEARANCE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. After brake drum installation, depress brake pedal to center shoes. Check pedal travel. Rotate brake drum to verify free movement.

BRAKE SHOE INSTALLATION CLEARANCE SPECIFICATIONS

Clearance Adjustment

1. Both switches are located below dash panel, at brake pedal bracket. Adjust brake pedal height. See «BRAKE PEDAL HEIGHT & FREE PLAY»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. Check clearance and position of switches. Clearance between brake pedal stopper rubber and threaded end of switch should be .01-.04" (.3-1 mm). To adjust, loosen lock nut, and turn switch body. After adjustment, tighten lock nut.

Note. If pressure cannot be adjusted to specifications, replace entire valve assembly.

1. With one person inside vehicle, set rear axle load to 1323 lbs. (595 kg) with weight in trunk. Using 2 pressure gauges, attach one to front brake bleeder and one to rear brake bleeder. Bleed air from front and rear bleeders.
2. Depress brake pedal until front brake pressure reading is 711 psi (50 kg/cm 2 ). Check rear brake pressure. See LSV PRESSURE SPECIFICATIONS table. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Check rear brake pressure. Refer to the LSV PRESSURE SPECIFICATIONS table. CAUTION: Check rear brake pressure 2 seconds after front brake pressure reaches specified value.
3. If readings are not as indicated, adjust sensor spring length by turning adjusting bolt. (Scheme 2) Repeat test, and recheck pressure. If pressure cannot be adjusted to specification, replace dual LSV assembly.

LSV PRESSURE SPECIFICATIONS

1. Ensure vehicle is in unladen condition. Have one person sit in driver's seat. To stabilize suspension deflection, have one person sit on rear of vehicle, and then get out of vehicle slowly.
2. Attach a lever to LSV stopper bolt. (Scheme 3) Adjust spring length to about 7.44" (189 mm). Using 2 pressure gauges, attach one to front brake bleeder and one to rear brake bleeder.
3. Bleed air from front and rear bleeders. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Check rear brake pressure. See LSV PRESSURE SPECIFICATIONS table.
4. Slowly set a 221-lb. (100 kg) weight on rear of vehicle by axle center. Depress brake pedal until front brake pressure reading is 1422 psi (100 kg/cm 2 ). Ensure rear brake pressure reading is as specified. See LSV PRESSURE SPECIFICATIONS table. If pressure readings are not as specified, adjust spring bracket. (Scheme 3) Repeat test.

POWER BRAKE UNIT

DO NOT disassemble power brake unit. After air-tight and operational tests, if problem is determined to be in power brake unit, replace complete assembly.

Note. Determine whether source of problem is in power brake unit or check valve. ALWAYS inspect check valve.

Air-Tight Check

1. Start and operate engine for 2 minutes. Turn engine off. Depress brake pedal several times. If brake pedal height rises gradually on successive pedal depressions, go to next step. If pedal does not rise on successive pumps, check for air leak.
2. Start engine. Depress brake pedal, and turn engine off. Hold brake pedal down for 30 seconds. If there is no change in brake pedal height, power brake unit is air tight. If pedal height changes, check for air leak.

Operational Check

With engine off, depress brake pedal several times until pedal height no longer changes. Press and hold brake pedal down. Start engine. If pedal goes down slightly, power brake unit is okay. If pedal does not move, check for air leak.

* PLEASE READ THIS FIRST *

Note. When removing or installing components, refer to appropriate illustration for exploded view of specific assembly. (Scheme 5)-20.

Removal (Maxima, Pathfinder, Pickup, NX, Sentra, Stanza & 240SX)

1. Raise and support front of vehicle. Remove wheel assembly. Remove bottom guide pin. Rotate caliper body upward on guide pin.
2. Remove pad retainers, shims and brake pads. Note pad condition and location for proper installation (if reusable). Minimum pad thickness is .08" (2.0 mm) for all models.

Installation

1. Clean piston and area around lock and guide pins. Install inner pad. Seat piston by placing lever through opening in caliper body, and pushing piston into bore. Apply brake grease to pad retainer points on caliper assembly. Install outer pad and shims.
2. Install pad retainers. Rotate caliper body down into original position. Install lower lock pin. Tighten bolts to specification, and depress brake pedal several times to seat pads. See «TORQUE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) at end of article.

Removal & Installation (300ZX)

1. Raise and support vehicle. Remove front wheel assembly. Remove pad pin clip, pad pins and cross spring. Remove pads and pad shims.
2. Note location and condition of pads for proper installation (if reusable). Minimum pad thickness is .08" (2.0 mm). To install, reverse removal procedure. DO NOT damage dust seal or allow oil on rotor.

Removal

Raise and support front of vehicle. Remove wheel assembly. Disconnect and plug brake line from caliper. Remove caliper mount bolts. Remove caliper assembly.

To install, reverse removal procedure. Tighten caliper mount bolts to specification. See TORQUE SPECIFICATIONS at end of article. Bleed hydraulic system. See BLEEDING BRAKE SYSTEM .

FRONT BRAKE ROTOR

Note. For exploded views of hub assemblies, See appropriate FRONT SUSPENSION article in the SUSPENSION Section.

Removal & Installation (Maxima, NX, Sentra, Stanza, 240SX & 300ZX)

Raise and support vehicle. Remove wheel assembly. Remove caliper, but DO NOT disconnect brake hose. See FRONT BRAKE CALIPER . Wire caliper aside. Remove rotor from hub. To install, reverse removal procedure.

Removal (Pathfinder 2WD & Pickup 2WD)

1. Remove caliper. See «FRONT BRAKE CALIPER»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) . Remove hub dust cap without damaging "O" ring. Remove "O" ring, cotter pin, adjusting cap and lock nut. Remove hub and rotor assembly from spindle without dropping outer bearing and washer.
2. Remove washer, outer bearing, inner grease seal, inner wheel bearing and hub-to-rotor bolts. Separate hub from rotor.

1. To install, reverse removal procedure. Coat wheel bearings and inside hub with wheel bearing grease. Install new inner grease seal.
2. Tighten hub-to-rotor bolts evenly, and adjust wheel bearings. Tighten wheel bearing lock nut. See «TORQUE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) at end of article. Bleed hydraulic system. See «BLEEDING BRAKE SYSTEM»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .

Removal (Pathfinder 4WD & Pickup 4WD)

Raise and support vehicle. Remove wheel assembly. Remove caliper, but DO NOT disconnect hydraulic line. See FRONT BRAKE CALIPER . Hang caliper from frame with wire. Remove locking hub. See LOCKING HUBS article in the DRIVE AXLES Section. Remove wheel bearing lock nut. Remove hub, with rotor attached, from knuckle.

1. Install and tighten hub-to-rotor bolts. Install wheel hub and knuckle in reverse order of removal. Pack cavity of knuckle with wheel bearing grease, and coat all bearings.
2. Rotate hub to seat bearings. Tighten wheel bearing lock nut. See «TORQUE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) at end of article. Bend lock washer lip up into a lock nut groove. Install spindle assembly, and tighten suspension components. Ensure axle shaft end play is .004-.012" (.1-.3 mm).
3. Adjust axle shaft end play with proper thickness snap ring. Mount and tighten caliper bolts. Bleed hydraulic system. See «BLEEDING BRAKE SYSTEM»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .

Removal (Maxima, NX, Pathfinder, Pickup, Sentra, Stanza & 240SX)

1. Raise and support rear of vehicle. Remove rear wheel assembly. Release parking brake. Remove parking brake cable retainer (if equipped). Remove lower pin bolts, lock spring and pad retainer spring (if equipped).
2. Rotate caliper upward. Remove pads and pad shims. Note location and condition of pads for proper installation (if reusable). Minimum pad thickness is .08" (2.0 mm).

1. To install, reverse removal procedure. Clean area around pin bolts and piston end. DO NOT damage piston boot. On Maxima, NX, Sentra, Stanza and 240SX, retract piston into cylinder body by turning it clockwise.
2. On all models, apply silicone brake grease to caliper sliding surfaces and pad contact area on mounting support.

1. Raise and support rear of vehicle. Remove rear wheel assembly. Release parking brake. Remove pad pin clip, pad pin and cross spring. Remove pads and pad shims.
2. Note location and condition of pads for proper installation (if reusable). Minimum pad thickness is .08" (2.0 mm). To install, reverse removal procedure. DO NOT damage dust seal or allow oil on rotor.

Remove rear wheel assembly. Disconnect hydraulic line from caliper, and plug openings. Disconnect parking brake cable and stay (if equipped). Remove caliper mount bolts, and remove caliper assembly.

To install, reverse removal procedure. Install and tighten hydraulic line and caliper mount bolts to specification. Refer to TORQUE SPECIFICATIONS at end of article. Bleed hydraulic system. See BLEEDING BRAKE SYSTEM .

Remove caliper. See REAR BRAKE CALIPER . Remove rotor from axle flange. If rotor is difficult to remove, install 2 bolts in rotor, and gradually tighten to remove rotor.

1. To install, reverse removal procedure. Before installing on Pathfinder SE and 300ZX, adjust parking brake shoe clearance. See «PARKING BRAKE SHOES»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. After installation is complete, adjust clearance between pad and rotor by depressing pedal until pedal stroke is constant.

Removal (Maxima, NX, Pathfinder, Pickup, Sentra & Stanza)

Raise and support vehicle. Remove rear wheel assembly. Remove drum. Remove brake shoe return springs. Remove adjuster and shoes as an assembly. Separate adjuster and shoes. Remove remaining components, and mark for installation reference.

1. To install, reverse removal procedure. Apply Lubriplate to backing plate bosses, adjuster assembly threads and parking brake lever pin.
2. Before installing drum, adjust brake shoe clearance. See «REAR BRAKE SHOE CLEARANCE»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) . After installation is complete, depress brake pedal to center shoes, and check pedal travel. Rotate brake drum to ensure free movement.

Disconnect electrical wiring at cylinder reservoir. Disconnect and plug hydraulic lines at master cylinder. Drain fluid from reservoir. Remove cylinder mounting nuts, and remove master cylinder.

To install, reverse removal procedure. Bleed hydraulic system. See BLEEDING BRAKE SYSTEM . Check pedal height. Refer to BRAKE PEDAL HEIGHT & FREE PLAY .

Remove master cylinder. See MASTER CYLINDER . Disconnect power unit push rod from brake pedal by removing clevis pin. Disconnect vacuum line from power brake unit. Remove power brake unit-to-firewall nuts. Remove power brake unit.

To install, reverse removal procedure. Before installing master cylinder, adjust booster output push rod. Refer to POWER BRAKE UNIT OUTPUT ROD .

Removal & Installation

1. Check valve is located in vacuum line between intake manifold and power brake unit. To remove, disconnect retaining clip from firewall (if equipped). Remove hose clamps, separate hoses from valve, and remove check valve.
2. Inspect check valve to ensure air flows in direction of intake manifold only. If air flows both ways or does not flow at all, replace check valve. To install, reverse removal procedure.

Removal (Pathfinder With Drum-In-Disc Rear Brake & 300ZX)

1. Raise and support vehicle. Remove rear wheel(s). Remove rear disc brake calipers and rotors. Refer to «REAR BRAKE CALIPER»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) and «REAR BRAKE ROTOR»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) .
2. Remove retainers, anti-rattle springs and spring seats. Remove return springs and adjusting screw spring. Remove shoes, guide plate, strut, strut spring and adjuster. DO NOT damage parking brake cable when separating shoes.

1. To install, reverse removal procedure. Apply brake grease to contact areas. After installation is complete, remove adjuster hole plug. (Scheme 4)
2. Ensure parking brake lever is released. Using a screwdriver, rotate adjuster wheel until parking brake shoes contact drum. (Scheme 4) Return adjuster wheel 7-8 latches. Install hole plug. Ensure shoes do not drag on rotor drum.

Scheme 4

Removal (Pathfinder & Pickup)

1. Raise and support vehicle. Remove rear wheel assembly. Remove brake drum. Disconnect parking brake cable and hydraulic brake line from backing plate. Remove 4 backing plate-to-rear axle case nuts.
2. Using Rear Axle Adapter (KV4010000) and Slide Hammer (ST36230000), pull out axle shaft assembly along with backing plate assembly. Remove oil seal from rear axle case. Discard oil seal. Using screwdriver, straighten lock washer, and secure lock nut on rear axle case side of backing plate.
3. Position axle shaft in vise using Rear Axle Adapter (KV40101000). Using Lock Nut Remover (ST38020000), remove bearing lock nut. Using hydraulic press and Bearing Puller (HT72480000), withdraw wheel bearing, bearing cage and backing plate.
4. On models with disc brake, press bearing outboard inner race using Bearing Puller (HT72480000) and Adapter (J22912-01). On all models, remove grease seal in bearing cage and discard.

Inspection

Check axle shaft for straightness, cracks, damage, wear or distortion. Check bearing for axial end play and wear or damage.

1. To install, reverse removal procedure. Install new oil seal in bearing cage, and lubricate cavity between seal lips. Place faced side of lock nut on washer side. Tighten lock nut specification. See «TORQUE SPECIFICATIONS»(/nissan/stanza/iii-1990-1992/remont/mechanical-hydraulic/#disc-drum) at end of article. Ensure washer lip fits in nut groove.
2. After installation, bend up locking tab on new bearing lock washer. Apply wheel bearing grease to wheel bearing and recess of axle case end. Apply gear oil to axle spline, and apply grease to seal surface before installing axle shaft. Use Shaft Guide (ST37840000) when installing axle shaft.

Note. When installing axle shaft, adjust axial end play by applying case end shims. When servicing one axle only, axial end play is .0008-.0059" (.020-.150 mm). When servicing both axles, end play is .012-.035" (.30-.90 mm) on first axle (right or left) and .0008-.0059" (.020-.150 mm) on second axle.

OVERHAUL

Note. Overhaul procedures are not available from manufacturer. Refer to appropriate illustration for exploded view of specific assembly. (Scheme 5)through (Scheme 21).

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Note. DO NOT separate caliper halves on 300ZX front disc brake caliper. Pistons and seals can be removed with caliper halves connected.

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Note. DO NOT separate caliper halves on 300ZX rear disc brake caliper. Pistons and seals can be removed with caliper halves connected.

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

DISC BRAKE SPECIFICATIONS

DISC BRAKE SPECIFICATIONS

DRUM BRAKE SPECIFICATIONS

DRUM BRAKE SPECIFICATIONS

See also:
• BRAKE LINE BLEEDING SEQUENCE