VALVE GP-MAIN CONTROL 1540541 - Caterpillar

Illustration 2 g00707096
Front gear group ( 3116 and 3126 Engines) (1) Camshaft gear (2) Timing marks (3) Camshaft idler gear (4) Crankshaft gear (5) Idler gear (6) Oil pump gear The basis for the correct fuel injection timing and the valve mechanism operation is determined by the alignment of the timing for the front gear group. Align timing marks (2) on camshaft idler gear (3) with the holes on camshaft gear (1) and crankshaft gear (4). This alignment is required in order to provide the correct relationship between the piston movement and the valve movement.Crankshaft Positions for Valve Lash Setting
Table 1
Valve Lash Setting For 3114, 3116, and 3126    
Valves     Dimension of Gauge    
Inlet    
0.38 0.08 mm (0.015 0.003 inch)    
Exhaust    
0.64 0.08 mm (0.025 0.003 inch)    
Table 2
3114 Crankshaft Positions for Valve Lash Setting    
The rotation of the crankshaft is viewed from the flywheel end.    
Rotation     Counterclockwise    
Check and Adjust with No. 1 Piston On this Stroke. (1)     Top Center Compression Stroke (2)    
Injectors     3-4    
Inlet Valves     1-2    
Exhaust Valves     1-3    
Check and Adjust with No. 1 Piston On this Stroke.     Top Center Exhaust Stroke    
Injectors     1-2    
Inlet Valves     3-4    
Exhaust Valves     2-4    
Firing Order     1-3-4-2    
( 1 ) Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for more