COMPRESSOR- 2003914 - Caterpillar

1. Remove nuts (1), cover (2), and the gasket. 2. Remove four bolts (3) and automatic timing advance (4). Remove O-ring seals from the automatic timing advance. 3. Remove gear (6) from fuel injection pump camshaft (5). Install Automatic Timing Advance 1272-012 1. Remove the plug from the timing pin hole in the fuel injection pump housing, and install Tool (A) in the timing pin hole.2. Install two 7/16" -20 NF x 4" long bolts in fuel injection pump camshaft (1). Slowly rotate the fuel injection pump until Tool (A) goes into the groove in the fuel injection pump camshaft. Remove the bolts from the camshaft. 3. Put No. 1 piston at the top center compression position (TC) with the following procedure:a. Remove plug (3), timing bolt (4) and cover (2) from the flywheel housing. b. Install Tool (B) in the flywheel housing. Use Tool (B) to slowly rotate the engine in the direction of normal rotation (counterclockwise as seen from the flywheel end of the engine) until timing bolt (4) can be installed in the flywheel housing and into the hole in the flywheel. c. Remove the valve cover from the valve cover base. Check to see if both rocker arms (5) for the No. 1 cylinder can be moved backward and forward. The No. 1 piston is at the top center compression position (TC) when the timing bolt is installed in the flywheel and both rocker arms for the No. 1 cylinder can be moved backward and forward. If both rocker arms cannot be moved, the No. 1 piston is not at the top center compression position (TC). Remove the timing bolt from the flywheel and rotate the engine in the direction of normal rotation (counterclockwise as seen from the flywheel end of the engine) one full turn 360 degrees, and install the timing bolt again.4. Remove the timing bolt, and use Tool (B) to rotate the engine in the opposite direction of normal rotation (clockwise as seen from the flywheel end of the engine) a minimum of 30 degrees. 5. Put gear (6) in position on the fuel injection pump camshaft. 6. Put two O-ring seals (8) in position on automatic timing advance (7).7. Put automatic timing advance in position on the fuel injection pump camshaft, and install the four bolts. Tighten the bolts to a torque of 3 N m (27 lb in).8. Use Tool (B) and slowly rotate the engine in the direction of normal rotation until the timing bolt can be installed in the flywheel. 9. Tighten the bolts that hold the automatic timing advance to the fuel injection pump camshaft to a torque of 55 7 N m (41 5 lb ft).10. Remove Tool (A) from the fuel injection pump housing, and remove the timing bolt from the flywheel.11. Check the timing as follows:a. Rotate the engine in the direction of normal rotation (counterclockwise as seen from the flywheel end of the engine) two full turns, and install Tool