CIRCUIT BREAKER 2864746 - Caterpillar

Table 2
C6.4    
   Inlet Valves    Exhaust Valves    
Valve Lash (Stopped Engine)    
0.25 mm (0.010 inch)    
0.40 mm (0.016 inch)    
TC Compression Stroke     1-2-4     1-3-5    
TC Exhaust Stroke (1)     3-5-6     2-4-6    
Firing Order     1-5-3-6-2-4 (2)    
( 1 ) 360° from TC compression stroke
( 2 ) The No. 1 cylinder is at the front of the engine.If the measurement is not within this range, an adjustment is necessary. Refer to "Valve Lash Adjustment" for the proper procedure.Valve Lash Adjustment
Use the following procedure to adjust the valve lash.
Illustration 2 g01425959
Valve lash
Ensure that the No. 1 piston is at the top center position on the compression stroke.
Table 3
C4.2    
TC Compression Stroke    Inlet Valves    Exhaust Valves    
Valve Lash    
0.25 mm (0.010 inch)    
0.40 mm (0.016 inch)    
Cylinders     1-2     1-3    
Table 4
C6.4    
TC Compression Stroke    Inlet Valves    Exhaust Valves    
Valve Lash    
0.25 mm (0.010 inch)    
0.40 mm (0.016 inch)    
Cylinders     1-2-4     1-3-5    
Adjust the valve lash according to Table 3 for C4.2 engines or Table 4 for C6.4 engines.
Loosen the adjustment locknut (3) .
Place the appropriate feeler gauge between rocker arm and the valve bridge. Then, turn the adjustment screw (4) in a clockwise direction. Slide the feeler gauge between the rocker arm and the valve bridge. Continue turning the adjustment screw (4) until a slight drag is felt on the feeler gauge. Remove the feeler gauge.
Tighten the adjustment locknut (3) to a torque of 4 1 N m (35 9 lb in). Do not allow the adjustment screw (4) to turn while you are tightening the adjustment locknut (3). Recheck the valve lash after tightening the adjustment locknut (3) .
Rotate the engine for 360 degrees in the direction of engine rotation. This will put the No. 6 piston at the top center position on the compression stroke.
Table 5
C4.2    
TC Exhaust Stroke    Inlet Valves    Exhaust Valves    
Valve Lash    
0.25 mm (0.010 inch)    
0.40 mm (0.016 inch)    
Cylinders     3-4     2-4    
Table 6
C6.4    
TC Exhaust Stroke    Inlet Valves    Exhaust Valves    
Valve Lash    
0.25 mm (0.010 inch)    
0.40 mm (0.016 inch)    
Cylinders     3-5-6     2-4-6    
Adjust the valve lash according to Table 5 for C4.2 engines or Table 6 for C6.4 engines.
Loosen the adjustment locknut (3) .
Place the appropriate feeler gauge between rocker arm and the valve bridge. Then, turn the adjustment screw (4) in a clockwise direction. Slide the feeler gauge between the rocker arm and the valve bridge. Continue turning the adjustment screw until a slight drag is felt on the feeler gauge. Remove the feeler gauge.
Tighten the adjustment locknut (3) to a torque of 4 1 N m (35 9 lb in). Do not allow the adjustment screw (4) to turn while you are tightening the adjustment locknut