HYDRAULIC AR 3265465 - Caterpillar

Illustration 1 g03005658
Typical exampleLubricate the threads and the underside of the head bolts with clean engine oil. Tighten the M15 bolts in the sequence that is shown in illustration 1 to the following torque. ... 130 N m (96 lb ft) Tighten the M12 bolts in the sequence that is shown in illustration 1 to the following torque. ... 65 N m (48 lb ft) Tighten the M15 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 90 degrees Tighten the M12 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 90 degrees Tighten the M15 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 70 degrees Tighten the M12 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 60 degreesMinimum thickness of cylinder head ... 90 mm (3.54330 inch)
Illustration 2 g02490336
Note: The maximum distortion of the bottom face of the cylinder head is given in table 1.
Table 1
Dimension    Maximum Permissible Distortion    
Width (A)    
0.05 mm (0.00197 inch)    
Length (B)    
0.05 mm (0.00197 inch)    
Diagonal Line (C)    
0.05 mm (0.00197 inch)    
Illustration 3 g02328933
Typical example (D) Valve guide height from the top of the valve guide to the valve spring seat ... 8.5 0.13 mm (0.335 0.0051 inch) (E) Outside diameter of the valve guides ... 12.950 to 12.985 mm (0.50984 to 0.51122 inch) (F) Length of the valve guides ... 56 mm (2.20472 inch) (G) Internal diameter of the valve guides ... 8.023 to 8.038 mm (0.31587 to 0.31646 inch) (H) Valve depths Inlet ... 0.3 to 0.7 mm (0.01181 to 0.02756 inch) The service limit for the depth of the inlet valve ... 0.9 mm (0.03543 inch) Exhaust ... 0.3 to 0.7 mm (0.01181 to 0.02756 inch) The service limit for the exhaust valve depth ... 1 mm (0.03937 inch)
Illustration 4 g02474819
Typical example (J) Diameter of the parent bore in the cylinder head ... 12.960 to 12.995 mm (0.51024 to 0.51161 inch) (K) Seat angle Inlet ... 59.5 degrees Exhaust ... 59.5 degrees
Illustration 5 g02847819
Typical example (L) Seat surface finish ... Ra 0.5 microns (M) Concentricity of valve seat to valve guide parent bore Maximum Total Indicated Reading (TIR) ... 0.05 mm (0.00197 inch)