3054E Industrial Engine Caterpillar

Crankshaft - Steel Crankshaft

Usage:

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Illustration 1	g00992214
The crankshaft for the four cylinder engine

(1) Crankshaft for the four cylinder engine

The maximum end play of the crankshaft ... 0.51 mm (0.0201 inch)

(2) Thrust washers

Standard thickness ... 2.26 mm to 2.31 mm (0.089 inch to 0.091 inch)

Oversize thickness ... 2.45 mm to 2.50 mm (0.097 inch to 0.098 inch)

(3) The crankshaft gear

Maximum permissible temperature of the gear for installation on the crankshaft ... 180 °C (356 °F)

Note: The timing mark is toward the outside of the crankshaft when the gear is installed on the crankshaft.

Note: All new turbocharged engines and turbocharged aftercooled engines have crankshafts that are nitrocarburised. The crankshaft can also be nitrided for 20 hours, if the nitrocarburised process is not available. After a crankshaft has been machined, the crankshaft must be rehardened. Inspect the crankshaft for cracks before machining and after machining. Naturally aspirated engines have induction hardened crankshafts.

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Illustration 2	g01017233
The 1104 engine crankshaft

Note: Refer to illustration 2 to use table 1.

The four cylinder engine.

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Table 1
The undersize diameter of the Crankshaft Journals
NUMBER	0.25 mm (0.010 inch)	0.51 mm (0.020 inch)	0.76 mm (0.030 inch)
1	75.909 mm (2.9885 inch) to 75.930 mm (2.9894 inch)	75.649 mm (2.9783 inch) to 75.670 mm (2.9791 inch)	75.399 mm (2.9685 inch) to 75.420 mm (2.9693 inch)
2	63.220 mm (2.4890 inch) to 63.240 mm (2.4898 inch)	62.960 mm (2.4787 inch) to 62.982 mm (2.4796 inch)	62.708 mm (2.4688 inch) to 62.728 mm (2.4696 inch)
3	39.47 mm (1.5539 inch)maximum	N/A	N/A
4	37.44 mm (1.4740 inch)maximum	N/A	N/A
5	44.68 mm (1.7591 inch)maximum	N/A	N/A
6	40.55 mm (1.5965 inch)maximum	N/A	N/A
7	Do not machine this diameter.	N/A	N/A
8	3.68 mm (0.1449 inch) to 3.96 mm (0.1559 inch)	N/A	N/A

Refer to table 2 for the maximum run out of the crankshaft journals.

The maximum difference in value between one crankshaft journal and the next crankshaft journal ... 0.10 mm (0.0039 inch)

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Table 2
Journal	Excessive run out
(1)	Mounting
(2)	0.08 mm (0.0031 inch)
(3)	0.15 mm (0.0059 inch)
(4)	0.08 mm (0.0031 inch)
(5)	Mounting

Refer to the Specifications Module, "Connecting Rod Bearing Journal" topic for more information on the connecting rod bearing journals and connecting rod bearings.

Refer to the Specifications Module, "Main Bearing Journal" topic for information on the main bearing journals and for information on the main bearings.