PIN-G.E.T. 1U0739 - Caterpillar

Illustration 1 g00290542
Table 1
Piston and rings    
Description     (1) Top ring     (2) Intermediate ring     (3) Oil control ring    
Width of groove in new piston    
5.160 0.010 mm (0.2030 0.0004 inch)    
5.160 0.010 mm (0.2030 0.0004 inch)    
8.050 0.500 mm (0.3169 0.0197 inch)    
Width of piston ring    
4.965 0.025 mm (0.1955 0.0010 inch)    
4.977 0.012 mm (0.1959 0.0005 inch)    
7.976 0.011 mm (0.3140 0.0004)    
Clearance between groove and piston ring    
0.160 to 0.230 mm (0.0063 to 0.0091 inch)    
0.161 to 0.205 mm (0.0063 to 0.0081 inch)    
0.053 to 0.095 mm (0.0021 to 0.0037 inch)    
End gap for the piston ring that is installed in
300 mm (11.8 inch) bore    
1.50 0.20 mm (0.059 0.008 inch)    
3.00 0.20 mm (0.118 0.008 inch)    
1.10 0.20 mm (0.043 0.008 inch)    
Installation     "UP-1" (1)     "UP-2" (2)     (3)    
( 1 ) The top ring must be installed with the "UP-1" mark toward the top of the piston.
( 2 ) The intermediate ring must be installed with the "UP-2" mark toward the top of the piston.
( 3 ) The oil control ring and the ring expander must be installed with the gaps 180 degrees across from each other. The white colored portion of the ring expander must be visible through the oil control ring gap.Bore in piston for pin ... 120.20 0.05 mm (4.732 0.002 inch)Diameter of piston pin ... 119.994 0.006 mm (4.7242 0.0002 inch)