Disc & Drum Nissan Stanza II

DESCRIPTION

All service brake systems are hydraulically operated using a tandem master cylinder and vacuum power unit. All other models have front disc and rear drum brakes.

BLEEDING PROCEDURE

Bleed air according to the following procedure

1. Left Rear Cylinder --> Right Front Caliper --> Right Rear Cylinder --> Left Front Caliper

Connect a transparent vinyl tube to air bleeder valve of caliper of cylinder.

BRAKE PEDAL HEIGHT

1. Measure pedal height from pressure face of pedal pad to floor pan insulator, without carpet.
2. To adjust to specification shown in table, loosen brake booster input rod lock nut, and turn input rod to attain proper height. Tighten lock nut and adjust stoplight switch.

PEDAL HEIGHT SPECIFICATIONS

BRAKE PEDAL FREE PLAY

STOPLIGHT SWITCH & AUTOMATIC SPEED CONTROL DEVICE SWITCH

1. Both switches are located under dash panel at brake pedal. Adjust travel during pedal height adjustment. After obtaining correct pedal height, check clearance and position of switches.
2. To adjust, loosen lock nut and turn switch body. Clearance between brake pedal stopper rubber and threaded end of switch is .01-.04" (.3-1 mm) on all models. After adjustment, tighten lock nut.

Sentra & Stanza (Sedan)

Remove parking brake lever cover. Raise rear of vehicle and support. Rear wheels should lock at 11-13 notches with 44 lbs. (20 kg) force applied. Loosen lock nut and rotate adjuster until properly adjusted.

Stanza Wagon

Raise rear of vehicle and support. Rear wheels should lock at 11-17 clicks, on 2WD models, or 8-9 notches on 4WD models, with 44 lbs. (20 kg) force applied. If not, rotate adjuster (2WD models) or loosen or tighten nut (4WD models), until properly adjusted.

Pulsar NX

Remove parking brake lever cover. Raise rear of vehicle and support. Rear wheels should lock at 7-11 notches with 44 lbs. (20 kg) force applied. Loosen lock nut and rotate adjuster until properly adjusted.

HEIGHT SENSING PROPORTIONING VALVE

Note. There are two types used: adjustable and nonadjustable.

Adjustable Type

1. Slowly place 221 lbs. (100 kg) of weight over center of rear axle. Attach 2 pressure gauges, one to front brake and one to rear brake. Depress brake pedal until front brake reading is 711 psi (50 kg/cm 2 ). Rear brake reading should be 327-469 psi (23-33 kg/cm 2 ).
2. Depress brake pedal until front reading is 1422 psi (100 kg/cm 2 ). Rear brake reading should be 455-654 psi (32-46 kg/cm 2 ). If readings are not correct, increase spring tension to lower rear brake reading.

Air Tight Check

1. Start engine and run for 2 minutes. Turn engine off. Depress brake pedal several times. If brake pedal goes down further on first time, but slowly rises after that, go to step 2. If not, check for air leak.
2. Start engine. Depress brake pedal, and turn engine off. Hold brake pedal for 30 seconds. If there is no change in brake pedal height, power brake unit is air tight. If there is change, check for air leak.

Removal

1. Raise and support vehicle. Remove wheel and tire. 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 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 bolt, and depress brake pedal several times to seat pads.

Scheme 1

Scheme 2

Scheme 3

Scheme 4

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

To install, reverse removal procedure. Tighten caliper mount bolts, and bleed hydraulic system.

FRONT DISC BRAKE ROTOR

Note. For exploded views of hub assemblies, see NISSAN article in FRONT SUSPENSION section.

Removal & Installation (Pulsar NX, Sentra & Stanza)

Raise and support vehicle. Remove tire and wheel. Remove caliper, but do not disconnect brake hose. Wire caliper out of way. Remove rotor. To install, reverse removal procedure.

Removal (Pulsar NX & Sentra)

Raise and support vehicle. Remove rear tire and wheel. DO NOT lift at parallel links. Remove hub cap. Remove lock nut and washer. Remove brake drum. Remove snap ring from back side of brake drum. Using Adapter (J-25804-01), press bearing from brake drum.

Using Adapter (J-26082) and 3-ton press, install bearing in brake drum. Install snap ring. Apply multi-purpose grease to sealing lip. Install brake drum, washer and lock nut. Install lock nut and tighten to 137-159 ft. lbs. (186-216 N.m). Install hub cap.

Removal (Stanza 2WD)

1. Raise and support vehicle. Do not lift at parallel links. Remove rear wheel and tire. Release parking brake.
2. Remove hub cap, cotter pin, adjusting cap and wheel bearing nut. Remove brake drum with outer bearing and washer. Remove grease seal and inner wheel bearing.

1. Coat inner and outer wheel bearings with multipurpose grease, and place inner bearing in hub. Install new grease seal, coating sealing lips with grease. Install and tighten lock nut to 18-25 ft. lbs. (24-34 N.m). Loosen lock nut and retighten to 84-108 INCH lbs. (10-12 N.m), while rotating wheel.
2. Wheel bearing preload should be 3.1 lbs (1.4 kg) or less with new grease seal. With used grease seal, preload should be 2.4 lbs. (1.1 kg) or less. Install cotter pin and hub cap.

Removal (Stanza 4WD)

1. Raise rear of vehicle and support. Remove rear tire and wheel. Remove brake drum. Remove lock nut. Disconnect brake line from wheel cylinder. Disconnect parking brake cable. Using a piece of wood or brass drift and hammer, tap drive shaft to remove from knuckle.
2. Mark transverse link bolt positions for reassembly purposes. Remove all bolts. Remove rear knuckle assembly. Remove axle hub from steering knuckle. Remove backing plate and brake shoe assembly from knuckle. Remove outer bearing and grease seal. Remove inner bearing and grease seal. Remove snap rings. Remove bearing outer race.

1. Install inner snap ring. Press outer bearing race into knuckle. Install bearings and grease seals. Install backing plate and brake shoe assembly. Press hub into assembly.
2. With 5-ton pressure applied to assembly, measure bearing preload. Preload should be.4-4.0 lbs. (.2-1.8 kg). (Scheme 5) If not, replace bearings. To complete installation, reverse removal procedure. Tighten lock nut to 174-231 ft. lbs. (237-314 N.m).

Scheme 5

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

To install master cylinder, reverse removal procedure. Bleed hydraulic system and check pedal height.

1. Disconnect power unit push rod from brake pedal by removing clevis pin. Disconnect hydraulic lines from master cylinder and vacuum line from power brake unit.
2. Remove master cylinder mounting nuts and master cylinder. Remove nuts attaching power brake unit to pedal bracket (Van) or firewall (all others). Remove power brake unit.

Note. Output rod on Sentra, Stanza (Sedan) and 200SX is nonadjustable.

To install, reverse removal procedure. On all models except Sentra, apply 19.7 in. Hg. Check distance output rod extends from power housing. (Scheme 6) Distance should be.40-.41" (10.3-10.5 mm).

Scheme 6

CHECK VALVE REPLACEMENT

Check valve is located in vacuum line between intake manifold and power brake unit on firewall. To remove, disconnect retaining clip from firewall. Remove hose clamps, separate hoses from valve, and remove check valve. To install, reverse removal procedure.

Disassembly

1. Drain brake fluid from caliper body and clean exterior of caliper assembly. Remove pin bolts and separate caliper body from caliper mount.
2. Remove pad retainers and pads. Force piston(s) and dust seal(s) out of bore by applying low pressure compressed air to brake inlet.

Reassembly

1. Apply brake fluid to sliding portions of piston and caliper bore. Apply rubber grease to inside of dust seals. Install piston seal in bore. Install dust seal on piston and slide piston into caliper bore. Secure dust seal in piston groove and caliper groove.
2. Apply multipurpose grease to sub pin rubber bushing, main pin, and sub pin. Install seals, sub pin rubber bushing, sub pin, and main pin. Apply grease to disc pad-to-caliper mount contact portions. Install caliper mount to caliper body.
3. Install caliper assembly without pads or retainer to knuckle spindle. Install upper pin bolt. Install disc pads, shims, retainer and rotate caliper down into position. Install lower pin bolt. When caliper assembly is mounted on vehicle, turn rotor to ensure there is no excessive drag. Install front brake hose and bleed brake system.

Disassembly (All Models)

1. Raise and support vehicle. Remove rear wheel and tire. Remove brake drum. Remove parking brake rear cable. Remove retainer, anti-rattle spring, spring seat and pin from primary brake shoe. Remove return springs and primary shoe. Remove secondary brake shoe and on Stanza, remove adjuster assembly.
2. On Sentra models, remove toggle lever spring. Remove clip, washer, spacer and toggle pin. Separate toggle lever and shoe. On all models, note lining condition and location for proper installation.

Note. Minimum lining thickness is .059" (1.50 mm) for all models.

1. To install, reverse removal procedure. Using brake grease, lubricate all brake shoe sliding surfaces, adjuster nut and rod threads, shoe-to-adjuster contact points and shoe-to-wheel cylinder and anchor.
2. After installing brake shoes, set initial clearance between shoe and drum with adjuster. See INITIAL CLEARANCE SPECIFICATIONS table. After installation is complete, adjust final clearance between shoe and drum by operating parking brake several times.

INITIAL CLEARANCE SPECIFICATIONS

Scheme 7

Scheme 8

With rear brake linings removed, disconnect hydraulic line and 2 mount bolts. With wheel cylinder removed, remove dust covers, pistons, cups and spring.

Cleaning & Inspection

Clean all parts in brake fluid. Check cylinder bore and pistons for excessive wear or damage. If clearance between piston and cylinder is greater than .006" (.15 mm), replace necessary parts. Replace any torn or damaged rubber parts.

Note. Wheel cylinders are produced by 2 manufacturers, Nabco and Tokico. Parts are not interchangeable. Ensure repair kit matches wheel cylinder. Brake fluid must be DOT 3 or higher rated.

To reassemble, reverse disassembly procedure. Apply brake fluid to cylinder bore, pistons and piston cups. Install parts using fingers only to avoid damage to rubber components.

Remove reservoir caps and filters. Drain brake fluid from reservoir. Remove snap ring and stopper bolt. Withdraw stopper, primary piston assembly, secondary piston assembly and springs. (Scheme 9) Remove check valve plugs. Withdraw check valve assemblies.

Scheme 9

To reassemble, reverse disassembly procedure. Apply rubber grease to all rubber parts. To prevent damage, apply brake fluid to remaining parts when assembling.

POWER BRAKE UNIT

Manufacturer does not recommend disassembly of this unit. After air-tight and operational tests, if problem is determined to be in power brake unit, complete assembly must be replaced. Do not disassemble power brake unit.

Note. Determine whether source of problem is in power brake unit or check valve. Before reaching final conclusion, inspect check valve.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

DISC SPECIFICATIONS

DISC BRAKE ROTOR SPECIFICATIONS

DRUM SPECIFICATIONS

DRUM BRAKE SPECIFICATIONS