MOUNT 1G2771 - Caterpillar

Camshaft Timing
Camshaft Timing Check
Remove the rear camshaft inspection cover from the side of the engine.
Put the No. 1 piston at the top center position on the compression stroke. Refer to Finding the Top Center Position for the No. 1 Piston.
With the No. 1 piston on the compression stroke, install the crankshaft timing pin. After you install the crankshaft timing pin, remove the camshaft timing pin from the camshaft timing pin's storage positions.
Illustration 1 g01194239
Installation of camshaft timing pin
(1) Camshaft timing pin
(2) Camshaft
Install camshaft timing pin (1) through the timing pin hole and into the hole in camshaft (2). In order for the engine to be timed correctly, the camshaft timing pins must fit into the holes in both of the camshafts.
If both of the timing pins cannot be installed into the holes in the camshafts, the engine is not in time and the camshaft position must be adjusted. Refer to Timing Adjustment of the Camshaft. Timing Adjustment of the Camshaft
Note: Before you make any timing adjustments, the timing must be checked in order to determine whether any adjustment is necessary. Refer to the section Camshaft Timing Check for this procedure.If the Camshaft Timing Check procedure indicates that the camshaft is not in time with the crankshaft, the camshaft drive gear must be removed and the camshaft must be rotated. Perform steps 1 through 9 if adjustment of the camshaft is necessary.
Put the No. 1 cylinder in the top center position on the compression stroke and install the crankshaft timing pin. Remove all of the valve covers.
Illustration 2 g01447105
Rocker arm shaft (typical example)
(1) Bolts
(2) Rocker arm shaft
Loosen bolts (1) that hold rocker arm shaft (2) in place, until all of the rocker arms are free from the valve bridges.
Illustration 3 g01194242
Rear end of the engine (typical example)
(3) Camshaft drive gear covers
Remove the crankshaft timing pin