3408B and 3408C Industrial and Marine Engines Caterpillar

Illustration 1	g01405020

Use the following procedure to tighten the nut (1) :

1. Tighten the nut to 290 ± 10 N·m (210 ± 7 lb ft).

2. Tap the nut with a hammer.

3. Again tighten the nut to 290 ± 10 N·m (210 ± 7 lb ft).

(2) Lubricate the bore of the O-ring seal with clean engine oil or glycerin.

Note: If the slots of the locknut (3) are not in alignment, increase the torque of the locknut.

(3) Torque for locknut ... 108 ± 7 N·m (80 ± 5 lb ft)

(4) Torque for taperlock studs ... 30 ± 5 N·m (22 ± 4 lb ft)

(A) Distance from the end of the housing to the inner bearing ... 6.6 ± 0.5 mm (0.26 ± 0.02 inch)

(5) Lubricate the sealing lip of the lip type seal with the lubricant that is being sealed.