#### REMOVAL AND INSTALLATION

##### Sentra, 200SX, Altima and Maxima

If the wheel hub bearing assembly is removed, it must be replaced.

NOTE: If the vehicle is equipped with ABS, the sensor must be removed to protect the sensor and its wiring.

1. Raise and safely support the vehicle. Remove the rear wheel(s).
2. If equipped with disc brakes, perform the following procedures:
   1. Remove the brake caliper and hang it by a piece of wire.
   2. Remove the brake caliper support.
   3. Remove the disc brake pads.
   4. Remove the brake disc.
3. If equipped with drum brakes, perform the following procedures:
   1. Remove the brake drum.
   2. If necessary, remove the brake shoe assembly.
4. Remove the grease cap.
5. Remove the cotter pin, wheel bearing locknut, washer, and the wheel hub bearing assembly. A slide hammer may be needed to remove the hub bearing assembly.

   NOTE: The wheel hub bearing assembly is not repairable; it must be replaced when defective.

   To install:

   NOTE: If the vehicle is equipped with ABS, the sensor ring must be removed and installed on the new hub.

6. Install the wheel hub bearing assembly, the washer and the wheel bearing locknut. Torque the wheel bearing locknut to 138–188 ft. lbs. (187–255 Nm).
7. Verify that the wheel bearings operate smoothly.
8. Install a new cotter pin into the spindle to hold the wheel bearing locknut.
9. Install a dial micrometer to the rear wheel hub bearing assembly and check the axial end-play; it should be less than 0.0020 in. (0.05 mm).
10. Install the grease cap.
11. If removed, install the ABS sensor and its wiring.
12. Install the brake assembly and the wheels.

##### 240SX and 300ZX

Fig. 1:Exploded view of rear wheel bearing assembly — 240SX

1. Raise and support the rear of the vehicle and remove the rear wheels. Remove the cotter pin, adjusting cap and insulator.
2. Apply the parking brake firmly to hold the rear halfshaft while removing the wheel bearing locknut. Remove the wheel bearing locknut.
3. Unbolt the caliper and move it aside. Do not disconnect the hose from the caliper. Do not allow the caliper to hang by the hose; support the caliper with a length of wire or rest it on a suspension member. Remove the brake disc.
4. Separate the halfshaft from the axle housing by lightly tapping it. Cover the driveshaft boots with a shop towel to prevent damage.
5. Remove the 4 bolts on the rear of the axle housing and that hold the wheel bearing, flange, and hub to the axle housing. Remove the wheel bearing, flange, and hub assembly.
6. Press the wheel bearing from the axle hub.
7. Mount the hub in a vise and remove the inner race, using bearing puller tool ST30031000, or equivalent. Discard the inner race and grease seals.
8. Clean all parts in a suitable solvent. Check the wheel hub and axle housing for cracks, preferably using the dye penetrant method. Check the wheel bearing seating surface for roughness, seizure or other damage that may interfere with proper bearing function. Check the rubber bushing for wear.

   To install:

9. Place the hub on a block of wood and seat the inner race using a suitable drift. Be careful not to damage the grease seals during installation of the inner race.
10. Press the bearing into the hub using a suitable drift.
11. Mount the bearing/hub assembly to the axle housing and torque the mounting bolts to 58–72 ft. lbs. (78–98 Nm).
12. Lubricate the halfshaft splines. Properly align the splines and insert the halfshaft into the wheel hub.
13. Install the wheel bearing locknut and torque the nut to 152–203 ft. lbs. (206–275 Nm). Install the insulator and fit adjusting cap. Install a new cotter pin.
14. Check the axial end-play as follows before mounting the rear wheels. Mount a dial indicator so the stylus of the dial rests on the face of the hub and check the wheel bearing axial end-play by attempting to rock the wheel hub in and out. The end-play should be 0.0020 in. (0.05mm) or less.
15. Install the rotor and caliper assembly.
16. Mount the rear wheels and lower the vehicle.