What is the rear wheel bearing nut tightening procedure?

First tighten to 25–34 N·m (2.5–3.5 kg-m, 18–25 ft-lb), then return the nut to 0 torque with 0 mm (0 in) end play, then retighten to 9–12 N·m (0.9–1.2 kg-m, 6.5–8.7 ft-lb), and adjust wheel bearing preload per the Preload Adjustment procedure.

Which parts must not be reused when servicing the rear axle hub?

The grease seal and the cotter pin are both marked 'must not be reused'. The document also states to replace the grease seal at every disassembly even if it appears good.

When should the rear wheel bearing be replaced?

When the race, cage, or roller surfaces make noise, or are cracked, pitted, worn, rough, or out-of-round, replace the bearing assembly.

How should the brake drum be inspected?

Check the drum for cracks with magnetic exploration or a dyeing test; replace if necessary, and refer to Section BR for further inspection.

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Nissan Micra Rear Axle Exploded Diagram - Wheel Bearing Torque Specs (RA-2)

Exploded view of rear axle with brake drum, bearings, seals and torque specs

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Exploded parts diagram of rear axle showing brake drum, wheel bearings, grease seals and axle tube with removal and inspection notes.

AI caption October 2005 · Photo 271 of 412

This is page RA-2 of a factory service manual section covering the rear axle, uploaded to a 1990 Nissan Micra gallery. The top of the page presents an exploded parts diagram of the rear drum brake hub assembly, labeling the grease seal (must not be reused), inside and outside wheel bearings, brake drum with wheel hub, bearing washer, wheel bearing nut, adjusting cap, cotter pin (must not be reused), hub cap (grease inner side), axle tube, and wheel nut. Torque specifications are given: wheel nuts 98–118 N·m (10.0–12.0 kg-m, 72–87 ft-lb); wheel bearing nut first tightening torque 25–34 N·m (2.5–3.5 kg-m, 18–25 ft-lb), then loosened to 0 with 0 mm end play, then retightened to 9–12 N·m (0.9–1.2 kg-m, 6.5–8.7 ft-lb), with a note to adjust wheel bearing preload per the Preload Adjustment procedure. The Removal section shows driving out the inside and outside wheel bearing outer races with a drift and hammer. The Inspection section gives criteria for replacing the wheel bearing (noise, cracks, pitting, wear), checking the brake drum for cracks via magnetic or dye testing (refer to Section BR), inspecting the axle tube threads and spindle surfaces, and replacing the grease seal at every disassembly.

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Frequently asked questions

What is the wheel nut torque specification shown in this diagram?: 98–118 N·m (10.0–12.0 kg-m, 72–87 ft-lb).
What is the rear wheel bearing nut tightening procedure?: First tighten to 25–34 N·m (2.5–3.5 kg-m, 18–25 ft-lb), then return the nut to 0 torque with 0 mm (0 in) end play, then retighten to 9–12 N·m (0.9–1.2 kg-m, 6.5–8.7 ft-lb), and adjust wheel bearing preload per the Preload Adjustment procedure.
Which parts must not be reused when servicing the rear axle hub?: The grease seal and the cotter pin are both marked 'must not be reused'. The document also states to replace the grease seal at every disassembly even if it appears good.
When should the rear wheel bearing be replaced?: When the race, cage, or roller surfaces make noise, or are cracked, pitted, worn, rough, or out-of-round, replace the bearing assembly.
How should the brake drum be inspected?: Check the drum for cracks with magnetic exploration or a dyeing test; replace if necessary, and refer to Section BR for further inspection.