BUSHING 1389231 - Caterpillar

Use the following procedure for the 290-6884 Cylinder Head Fastener Gp.
Illustration 1 g00613300
Bolt tightening sequence
Note: Lubricate the bolts with clean engine oil prior to assembly.Note: Torque to yield bolts are one time use only, do not reuse the cylinder head bolts.Use the following procedure in order to tighten the cylinder head bolts:
Tighten bolt (1) through bolt (26) in a numerical sequence. Tighten the bolts to the following torque. ... 160 15 N m (118 11 lb ft)
Tighten bolt (1) through bolt (26) again in a numerical sequence. Tighten the bolts again to the following torque. ... 160 15 N m (118 11 lb ft)
Place a mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence. Rotate the bolts in the clockwise direction. ... 90 degrees (1/4 turn)
Loosen bolt (1) through bolt (26) until the washers are loose under the bolt heads.
Tighten bolt (1) through bolt (26) in a numerical sequence. Tighten the bolts to the following torque. ... 160 15 N m (118 11 lb ft)
Tighten bolt (1) through bolt (26) again in a numerical sequence. Tighten the bolts again to the following torque. ... 160 15 N m (118 11 lb ft)
Place a mark on bolt (1) through bolt (26). Rotate bolt (1) through bolt (26) in a numerical sequence. Rotate the bolts in the clockwise direction. ... 90 degrees (1/4 turn)
Tighten bolt (27) through bolt (31) in a numerical sequence. Tighten the bolts to the following torque. ... 28 7 N m ( 21 5 lb ft) (32) Plug (not shown) Thickness of new cylinder head ... 130.00 0.15 mm ( 5.118 0.006 inch)Note: The flatness of the cylinder head should be within 0.15 mm ( 0.006 inch). The flatness should also be a maximum of 0.05 mm ( 0.002 inch) for any 150.00 mm ( 5.906 inch) span.