PISTON 7D8361 - Caterpillar

Illustration 1 g03177828
Table 1
Specification for 248-5031 Cylinder Head Gp 378-7414 Cylinder Head Gp, and 396-9052 Cylinder Head Gp
Item Qty Part Specification Description
1 1 5B-7890 Pipe Plug Before assembly, apply Loctite C5A copper anti-seize to the threads.
2 6 131-0420 Cylinder Head Fastener Gp Before assembly, apply engine oil to cylinder head bolt threads.
Use the following procedure in order to tighten the cylinder head bolts. Refer to Illustration 1 for the tightening sequence:
1. Tighten bolt (1) through bolt (8) in the numerical sequence to 30 5 N m (22 4 lb ft).
2. Again tighten bolt (1) through bolt (8) in the numerical sequence to 270 35 N m (200 26 lb ft).
3. Again tighten bolt (1) through bolt (8) in the numerical sequence to 450 20 N m (332 15 lb ft).
4. Tighten two bolts (4) only after bolt 1 through bolt 8 have been given the final torque. Tighten two bolts (4) to 55 10 N m (41 7 lb ft).
3 2 131-0421 Cylinder Head Fastener Gp
4 2 5B-0213 Bolt
Illustration 2 g03181356
Table 2
Item Qty Part Specification Description
5 5 3B-0645 Cup Plug Apply high strength or high temperature anaerobic flange sealant to the bores for the cup plugs prior to the installation.
6 3 3B-0623 Cup Plug Apply high strength or high temperature anaerobic flange sealant to the bores for the cup plugs prior to the installation.
Installation depth (F) is 1.0 0.5 mm (0.04 0.02 inch).
7 2 191-6760 Valve Seat Insert During installation, valve seat inserts to be shrunk with reduced temperature.
8 1 4P-6925 Oil Sleeve During installation, oil sleeve to be shrunk with reduced temperature.
Installation depth is 16.50 1.00 mm (0.650 0.040 inch).
9 2 266-8718 Valve Seat Insert During installation, valve seat inserts to be shrunk with reduced temperature.
E 2 3B-0623 Cup Plug Installation depth of the cup plugs from the top surface of the cylinder head is 9.0 0.5 mm (0.35 0.02 inch).