RAIL GP-ENGINE SUPPORT 7W3754 - Caterpillar

To prevent possible injury, do not use the starter to turn the flywheel. Hot engine components can cause burns. Allow additional time for the engine to cool before measuring valve clearance.
This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Note: Valve lash is measured between the rocker arm and the valve bridge. All measurements and adjustments must be made with the engine stopped and the valves fully closed.Valve Lash Check
An adjustment is not necessary if the measurement of the valve lash is in the acceptable range in Table 1.
Table 1
   Inlet Valves    Exhaust Valves    
Valve Lash (Stopped Engine)    
0.38 0.08 mm
(0.015 0.003 inch)    
0.81 0.080 mm
(0.032 0.003 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
Illustration 1 g01373511
Cylinder and valve location (A) Exhaust valves (B) Inlet valvesUse the following procedure to adjust the valve lash:
Put the No. 1 piston at the top center position on the compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Table 2
TC Compression Stroke    Inlet Valves    Exhaust Valves    
Valve Lash    
0.38 0.08 mm
(0.015 0.003 inch)    
0.81 0.080 mm
(0.032 0.003 inch)    
Cylinders     1-2-4     1-3-5    
Adjust the valve lash according to Table 2.
Lightly tap the