2006/01/23 Caterpillar

Engine:

G3304 (S/N: N4F1-UP; 37Y1-UP)

G3306 (S/N: JCA1-UP; CNR1-UP; G6X1-UP; 07Y1-UP)

Description of Change: The clearance between the ends of the piston rings after installation has changed. The above listed service module is affected by this change. Update your manual in order to reflect the change.

Adaptable To:

(1) 4P-2656 Piston Ring (Top ring)

When a new piston ring is installed in a cylinder liner with a bore size of 120.650 mm (4.7500 inch), the clearance between the ends of the piston ring is the following value. ... 0.62 ± 0.19 mm (0.024 ± 0.008 inch)

(2) 110-8722 Piston Ring (Intermediate ring)

When a new piston ring is installed in a cylinder liner with a bore size of 120.650 mm (4.7500 inch), the clearance between the ends of the piston ring is the following value. ... 0.62 ± 0.19 mm (0.024 ± 0.008 inch)

(3) 4P-2658 Piston Ring (Oil control ring)

When a new piston ring is installed in a cylinder liner with a bore size of 120.650 mm (4.7500 inch), the clearance between the ends of the piston ring is the following value. ... 0.57 ± 0.19 mm (0.022 ± 0.008 inch)

The clearance between the ends of the piston rings increases when the cylinder liner bore size increases.

The increase in the clearance between the ends of the piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore size is the following value. ... 0.08 mm (0.003 inch)