CG137-08 and CG137-12 Generator Sets Caterpillar

Cylinder Head

Usage:

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Illustration 1	g03320518
(1) Large bolts (3/4 inch) (2) Small bolts (3/8 inch)

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Table 1
Specification for 300-5525 Cylinder Head Gp
Item	Qty	Part	Specification Description
Use any one of the following tightening procedure to tighten the bolts for the cylinder head:
Tighten bolt (19) through bolt (27) only after bolt (1) through bolt (18) have been given the final torque.
1	28	236-0484 Bolt	Use the following procedure in order to tighten the bolts for the cylinder head: 1. Before assembly, apply clean engine oil to the threads of the (3/4) bolts and the threads of (3/8) bolts. 2. Tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 270 ± 27 N·m (200 ± 20 lb ft). 3.Again, tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 450 ± 20 N·m (332 ± 15 lb ft). 4. Again, tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 450 ± 20 N·m (332 ± 15 lb ft). 5. Install the rocker arm groups. 6. Tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 270 ± 27 N·m (200 ± 20 lb ft). 7. Again, tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 450 ± 20 N·m (332 ± 15 lb ft) 8. Again, tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 450 ± 20 N·m (332 ± 15 lb ft). 9. Tighten bolt 19 through bolt 27 in the numerical sequence as shown in Illustration 1 to 43 ± 7 N·m (32 ± 5 lb ft).
1	06	234-9558 Bolt
2	18	0L-1352 Bolt
Alternate tightening procedure to tighten the bolts for the cylinder head:
-	-	-	Use the following procedure in order to tighten the bolts for the cylinder head: 1. Before assembly, apply molybdenum paste to the threads of the (3/4) bolts. 2. Tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 270 ± 27 N·m (200 ± 20 lb ft). 3.Again, tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 390 ± 10 N·m (288 ± 7 lb ft). 4. Again, tighten bolt 1 through bolt 14 in the numerical sequence as shown in Illustration 1 to 390 ± 10 N·m (288 ± 7 lb ft). 5. Install the rocker arm group. 6. Tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 270 ± 27 N·m (200 ± 20 lb ft). 7. Again, tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 390 ± 10 N·m (288 ± 7 lb ft) 8. Again, tighten bolt 15 through bolt 18 in the numerical sequence as shown in Illustration 1 to 390 ± 10 N·m (288 ± 7 lb ft). Before assembly, lubricate the threads of the (3/8) bolts with clean engine oil. 9. Tighten bolt 19 through bolt 27 in the numerical sequence as shown in Illustration 1 to 43 ± 7 N·m (32 ± 5 lb ft).

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Illustration 2	g03320519
Top view

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Table 2
Item	Qty	Part	Specification Description
3	2	4N-0932 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs. Installation depth (A) is 4.3 ± 0.8 mm (0.17 ± 0.03 inch).
4	2	5P-0063 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs. Installation depth (B) is 2.5 ± 0.8 mm (0.10 ± 0.03 inch).

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Illustration 3	g03320632

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Table 3
Item	Qty	Part	Specification Description
5	3	3B-0645 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs. Installation depth (H) is 4.5 ± 0.5 mm (0.18 ± 0.02 inch).
6	3	3B-0645 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs. Installation depth (J) is 2.0 ± 0.5 mm (0.08 ± 0.02 inch).
7	4	3B-0623 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs. Installation depth (K) is 0.8 ± 0.5 mm (0.03 ± 0.02 inch).
G	-	-	Height of the new cylinder head is 125.00 ± 0.25 mm (4.921 ± 0.010 inch).
8	4	3B-0623 Cup Plug	Apply, Loctite 11358 sealant to the bores in the cylinder head for the cup plugs.
9	4	109-0073 O-Ring Seal	Before assembly, lubricate the bore lightly with silicone compound.
10	4	213-7539 Adapter	Before assembly, apply Loctite C5A copper anti-seize to the threads. Torque to 95 ± 7 N·m (70 ± 5 lb ft).

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