RING-LOCK 8G1259 - Caterpillar

Install the camshaft timing pins (1) through the timing pin holes and into the holes in the camshaft (2). In order for the engine to be timed correctly, the camshaft timing pins must fit into the holes in the camshafts.
If both of the timing pins (1) cannot be installed into the holes in the camshaft, 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. Steps 1 through 8 should be used if adjustment of the camshaft is necessary.
Put the No. 1 cylinder in the Top Center Position of the compression stroke and install the crankshaft timing pin. Remove all of the valve covers.
Illustration 2 g00557720
Loosening Rocker Arm Shafts (Typical Example) (1) Bolts (2) Rocker arm shaft
Loosen bolts (1) that hold rocker arm shafts (2) in place, until all of the rocker arms are free from the valve bridges.
Illustration 3 g00688186
Rear End Of The Engine (Typical Example) (3) Camshaft drive gear covers
Remove the crankshaft timing pin and camshaft drive gear cover (3) from the rear housing.
Illustration 4 g00604062
Camshaft Drive Gear (4) Camshaft drive gear (5) Bolts (6) Bolt (7) Washer (8) Plate
Loosen the camshaft drive gears (4) by using the following procedure:
Use a 6V-6080 Torque Multiplier and a 5P-1748 Socket and loosen bolt (6) .
Remove bolt (6) and washer (7). Remove bolts (5) and plate (8) .
Refer to the illustration in Figure 4. Put washer (7) between the camshaft and plate (8). Install bolt (6) finger tight.
Install bolts (5) finger tight.
Sudden movement of camshaft drive gear can occur when the camshaft drive gear is pulled off the taper of the camshaft. To prevent possibly personal injury, be sure that the bolt is installed (finger tight) to restrict the movement of the camshaft drive gear when the camshaft drive gear is pulled off of the taper of the camshaft.
Tighten bolts (5) evenly in order to pull camshaft drive gear (4) off the taper of the camshaft.
Fasten a hoist