LINK 4578551 - Caterpillar

Illustration 3 g00662258
Rocker arm shaft assembly
(1) Bolt
(2) Rocker Shaft
Remove all valve covers on the side of the engine with the camshaft that needs adjustment. Disconnect the ignition wiring from the ignition transformer and remove the ignition transformer. Loosen bolts (1) that hold rocker shaft (2) to the valve cover bases until all rocker arms are free from the valves. Note: The above procedure must be done before the camshaft drive gear is pulled off the camshaft taper.
Illustration 4 g00662269
Left rear
(3) Cover
(4) Speed/Timing sensor
Remove camshaft gear cover (3) from the rear of the engine. If the left rear camshaft gear must be removed, remove speed/timing sensor (4).
Illustration 5 g00662337
Rear gear group
(5) Gear (left camshaft drive)
(6) Idler gear
(7) Speed/Timing ring
(8) Gear (right camshaft drive)
(9) Washer
(10) Bolt
(11) Bolt
(12) Plate
To remove the left camshaft drive gear, remove bolt (10) and washer (9). Remove speed/timing ring (7) from the left camshaft.
To remove right camshaft drive gear, remove bolt (11) and plate (12) from the right camshaft.
Illustration 6 g00662446
Removing the camshaft drive gear
(A) 1P-0820 Hydraulic Puller
(12) 4W-4586 Plate
Use tooling (A) to remove camshaft drive gears (5) and (8).
Install the three 5H-1504 Hard Washers behind plate (12). This plate holds the camshaft drive gear on the camshaft. Install plate (12) and bolt (11) on the camshaft.
Do not apply more than 41,340 kPa (6,000 psi) of pressure to 1P-0820 Hydraulic Puller. 8B-7559 Adapters are rated at 5 ton each and 1P-0820 Hydraulic Puller is rated at 17 ton at 68,900 kPa (10,000 psi). If too much pressure is applied, the gear may be damaged.
Use the 8B-7559 Adapter and needed parts from the 8B-7548 Push-Puller Tool Group to install the 1P-0820 Hydraulic Puller on the camshaft drive gear. Apply 41,340 kPa (6,000 psi) to the puller and tap the screw until the camshaft drive gear is free of the camshaft taper. Remove the tooling and the camshaft drive gear from the camshaft.
Illustration 7 g00662447
Camshaft timing
(13) Timing pin
Remove timing pins (13) from the storage positions which are located under the rear camshaft covers on each side of the engine.
Turn the camshafts until timing pins (13) can be installed through timing holes and into the grooves (slots) in the camshaft.
Clean the taper of the camshaft and clean the tapered bore of the camshaft gear. Use a lint free cloth that is saturated with a solvent in order to remove any excess oil. Clean the parts again with a lint free alcohol wipe in order to remove any residue. If the alcohol wipe is dirty after cleaning the parts, clean the parts again with a clean lint free alcohol wipe. Repeat the cleaning until no residue is left on the alcohol wipe. Note: The taper of the camshaft and the tapered bore of the camshaft gear must be clean, dry, and free of residue.
Ensure that both camshafts have the pins in place.
Ensure that the flywheel has the pin in place.
Install the camshaft gears onto the camshafts and remove any backlash by rotating the gears in the