3406 INDUSTRIAL & MARINE ENGINES Caterpillar


Cylinder Head

Usage:

Large bolts (3/4 inch). Put engine oil on all bolt threads and tighten the bolts in the following step sequence:

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

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

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

4. Install the rocker arm shafts (1) for the engine valves.

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

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

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

8. Tighten the twelve small bolts (2) to ... 32 ± 5 lb. ft.(43 ± 7 N·m)

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

(3) Torque for twelve studs in cylinder head ... 20 ± 3 lb. ft.(25 ± 4 N·m)

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

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