BOLT 9Y7037 - Caterpillar

Illustration 1 g01338264
Typical example
(1) CrankshaftThe maximum end play of the crankshaft ... 0.51 mm (0.0201 inch) (2) Thrust washersStandard 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 gearMaximum 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.
Illustration 2 g01338265Note: Refer to illustration 2 to use table 1.
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 75.905 mm to 75.926 mm (2.9884 inch to 2.9892 inch) 75.651 mm to 75.672 mm (2.9784 inch to 2.9792 inch) 75.397 mm to 75.418 mm (2.9684 inch to 2.9692 inch)
2 63.216 mm to 63.236 mm (2.4888 inch to 2.4896 inch) 62.962 mm to 62.982 mm (2.4788 inch to 2.4796 inch) 62.708 mm to 62.728 mm (2.4688 inch to 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
9 4.36 mm to 4.60 mm (0.1717 inch to 0.1811 inch) N/A N/A Refer to table 2 for the maximum run out of the crankshaft journals.
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 Specifications, "Connecting Rod Bearing Journal" for more information on the connecting rod bearing journals and connecting rod bearings.Refer to Specifications, "Main Bearing Journal" for information on the main bearing journals and for information on the main bearings.