3406C DIESEL TRUCK ENGINE Caterpillar


Cylinder Head

Usage:

(1) Large bolts (3/4 inch). Put 6V4876 Molycoat on all bolt threads and under all bolt heads. Tighten the bolts in the following step sequence:

1. Tighten bolts from 1 through 20 in number sequence to ... 270 ± 25 N·m (200 ± 20 lb ft)

2. Tighten bolts from 1 through 20 in number sequence to ... 450 ± 20 N·m (330 ± 15 lb ft)

3. Tighten bolts from 1 through 20 in number sequence again to ... 450 ± 20 N·m (330 ± 15 lb ft)

4. Install the rocker arm shafts for the engine valves.

5. Tighten bolts from 21 through 26 in number sequence to ... 270 ± 25 N·m (200 ± 20 lb ft)

6. Tighten bolts from 21 through 26 in number sequence to ... 450 ± 20 N·m (330 ± 15 lb ft)

7. Tighten bolts from 21 through 26 in number sequence again to ... 450 ± 20 N·m (330 ± 15 lb ft)

8. Tighten the twelve small bolts (2) to ... 45 ± 7 N·m (33 ± 5 lb ft)

(2) Small bolts (3/8 inch). See Step 8 above.

(3) Torque for twelve studs in cylinder head ... 30 ± 5 N·m (22 ± 4 lb ft)

(4) Thickness of cylinder head (new) ... 112.78 ± 0.25 mm (4.440 ± .010 in)

Minimum permissible thickness of cylinder head ... 111.51 mm (4.390 in)

(5) Torque for six studs that hold fuel line adapter locks ... 30 ± 5 N·m (22 ± 4 lb ft)

NOTE: Flatness of the cylinder head should be within 0.13 mm (.005 in) total, and a maximum of 0.03 mm (.001 in) for any 76.2 mm (3.00 in) span.

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