HOSE AS 3086028 - Caterpillar

Illustration 1 g03334417
The tightening sequence
Illustration 2 g03334432
Head bolts
(A) 270 degrees
(B) 225 degrees
Table 1
Bolt Torque Specifications
Callout Quantity Part Specification Description
Lubricate the threads and the underside of the head bolts with clean engine oil.
- 10 - Tighten the bolts in the sequence that is shown in Illustration 1 to the following torque. 50 N m (37 lb ft)
- 10 - Tighten the bolts in the sequence again to the following torque. 100 N m (74 lb ft)
The head bolts require an additional torque turn procedure. The bolts numbered (1, 3, and 4) are the three long cylinder head bolts. All of the other cylinder bolts are short bolts. The tightening sequence is shown in Illustration 1
- 7 - Place an index mark on the top of each bolt head. Tighten the short bolts for the additional amount of 225 degrees (B). Refer to Illustration 2.
- 3 - Place an index mark on the top of each bolt head. Tighten the long bolts for the additional amount of 270 degrees (A). Refer to Illustration 2.
Illustration 3 g03334654
Cylinder head
Table 2
Cylinder Head Specifications Refer to Illustration 3
Callout Quantity Dimension Specification Description
- - - Thickness of the cylinder head 117.95 to 118.05 mm (4.643 to 4.647 inch)
- - - Minimum thickness of cylinder head 117.20 mm (4.614 inch)
Dimension The Maximum Distortion of the Cylinder Head
Width (C) 0.03 mm (0.0018 inch)
Height (D) 0.05 mm (0.0019 inch)
Diagonal Line (E) 0.05 mm (0.0019 inch)
Width (F) 0.03 mm (0.0018 inch)