NUT 8D3992 - Caterpillar

Illustration 1 g03111558
Table 1
Specification for 172-0834 Cylinder Head
Item Qty Part Specification Description
1 6 131-0420 Cylinder Head Fastener Gp Use the following procedure in order to tighten the cylinder head bolts:
Refer to Illustration 1for the tightening sequence:
1. Before assembly, coat the threads with engine oil.
2. Tighten bolt (1) through bolt (8) in the numerical sequence to 30 5 N m (22 4 lb ft).
3. Tighten bolt (1) through bolt (8) in the numerical sequence to 200 15 N m (148 11 lb ft).
4. Again, tighten bolt (1) through bolt (8) in the numerical sequence to 200 15 N m (148 11 lb ft).
5. Turn bolt (1) through bolt (8) in the numerical sequence to an angle of 180 5 degrees.
6. Tighten two bolts (3) only after bolt (1) through bolt (8) have been given the final torque. Tighten two bolts (3) to 55 10 N m (41 7 lb ft).
2 2 131-0421 Cylinder Head Fastener Gp
3 2 5B-0213 Bolt
Illustration 2 g03086686
Table 2
Item Qty Part Specification Description
4 5 3B-0645 Cup Plug Before assembly, apply high strength or high temperature Anaerobic Flange Sealant to the bores.
5 2 130-2608 Valve Seat Insert During installation, shrunk the valve seat insert with reduced temperature (Reference temperature : −60° C (−76° F)) and press the insert into the cylinder heads counterbore.
6 2 130-2607 Valve Seat Insert During installation, shrunk the valve seat insert with reduced temperature (Reference temperature : −60° C (−76° F)) and press the insert into the cylinder heads counterbore.
7 3 3B-0623 Cup Plug Before assembly, apply high strength or high temperature Anaerobic Flange Sealant to the bores.
Installation depth (D) is 1.0 0.5 mm (0.04 0.02 inch).
8 2 3B-0623 Cup Plug Before assembly, apply high strength or high temperature Anaerobic Flange Sealant to the bores.
Installation depth (C) is 9.0 0.5 mm (0.35 0.02 inch).