3054 Truck Engine Caterpillar


Crankshaft

Usage:

3054 6NR



Illustration 1g00295557

Crankshaft And Main Bearing Journals

Note: A crankshaft that was not originally induction hardened must be rehardened using a nitrocarburizing process or a nitriding process for 20 hours after it is remachined.

(1) Connecting rod bearing

(2) Top and bottom thrust washer thickness

Standard ... 2.26 to 2.31 mm (0.089 to 0.091 inch)
Oversize ... 2.45 to 2.50 mm (0.096 to 0.098 inch)

(3) Main bearing clearance

All bearings ... 0.057 to 0.117 mm (0.0022 to 0.0046 inch)
Bearing width
Center bearing ... 36.32 to 36.70 mm (1.430 to 1.445 inch)
All other bearings ... 31.62 to 31.88 mm (1.245 to 1.255 inch)
Thickness of the bearing at the center
All bearings ... 2.083 to 2.086 mm (0.0820 to 0.0821 inch)

(4) Crankshaft gear

(5) End play of the crankshaft ... 0.05 to 0.38 mm (0.002 to 0.015 inch)

Maximum permissible end play ... 0.51 mm (0.020 inch)

(6) Width of the connecting rod journal ... 40.35 to 40.42 mm (1.589 to 1.591 inch)

Connecting rod journal diameter of flange ... 133.27 to 133.37 mm (5.247 to 5.251 inch)

Depth of recess for connecting rod bearing ... 20.22 to 20.98 mm (0.796 to 0.826 inch)

Bore of recess for connecting rod bearing ... 46.96 to 46.99 mm (1.849 to 1.850 inch)

Tighten the caps for the main bearing journal to the following torque: ... 265 N·m (195 lb ft)

Main bearings are available for remachined journals with the following undersize dimensions: ... 0.25, 0.51 and 0.76 mm (0.010, 0.020 and 0.030 inch)

Tighten the retaining bolts of the crankshaft pulley (not shown) to the following torque: ... 115 N·m (85 lb ft)

Apply Locktite 2431 to the bolts of the crankshaft damper. Tighten the bolts (not shown) to the following torque:

M8 bolts ... 35 N·m (26 lb ft)
M12 bolts ... 75 N·m (55 lb ft)

Tighten the bolts of the rear oil seal housing to the cylinder block (not shown) to the following torque: ... 22 N·m (16 lb ft)

Tighten the bolts of the rear oil seal housing to the bridge (not shown) to the following torque:

M6 ... 13 N·m (115 lb in)
M8 ... 18 N·m (159 lb in)

Caterpillar Information System:

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