BOOT 3D8336 - Caterpillar

Remove Camshafts
Start By:a. remove rocker shaft assemblies and push rodsb. remove service meter and rear coverc. remove governord. remove magneto drive 1. Remove all access covers (1) from the sides of the engine. 2. Push valve lifters (2) up away from the camshaft into the cylinder head assemblies, and hold the lifters in position. An O-ring seal can be used to hold the valve lifters up. 3. Remove the bolts and cover (3) from both sides of the front drive housing.
Use the 8B7561 Step Plate of tooling (A) to prevent damage to the end of the camshaft during removal of drive gear (4).
6. Use tooling (A) to remove drive gear (4) from the end of the camshaft on each side of the engine. It may be necessary to hit the end of the screw, part of 8B7548 Push-Puller in tooling (A), to loosen drive gear (4) from the taper on the camshaft. Remove the drive gears from the flywheel housing. 7. Remove bolts (6) and washer (5) from the end of the camshaft on each side of the engine.
Typical Example8. Install tooling (B) on each end of rear camshaft (8). Tooling (C) can be installed on the flywheel housing to remove the camshafts from the rear of the engine, or it can be installed on the front drive housing to remove the camshafts from the front of the engine.9. Install tooling (C) on the flywheel housing.10. Install tooling (D) on one end of tooling (B).11. Pull the camshafts out while rotating them with tooling (D). Pull the camshafts out of the engine until a hoist can be fastened to them. Remove front camshaft (7) and rear camshaft (8) as a unit from the engine. The weight of the 3512 Engine camshaft unit is approximately 63 kg (139 lb). The weight of the 3516 Engine camshaft unit is approximately 82 kg (181 lb). 12. Remove bolts (9). Separate the camshafts, and remove spacer (10).13. If necessary, remove the dowel from the end of the front camshaft.Install Camshafts
Typical Example1. Position tooling (C) on the flywheel housing. Install the bolts that hold it. Do not tighten the bolts at this time.2. Install tool (B) on the end of front camshaft (7).3. Install front camshaft (7) in the engine until tool (B) is located in the first camshaft bearing.4. Rotate the camshaft and tighten the bolts that hold tooling (C) to the flywheel housing.5. Rotate the camshaft and install it until the end of the camshaft is just out of tooling (C).
Typical Example
Typical Example6. If dowel (11) was removed from the front camshaft, install the dowel in the front camshaft. Install the dowel until the end of the dowel is 22.0 0.5 mm (.87 .02 in) from the end surface of the camshaft. Make sure the camshafts are installed respective to the marks (rear L.H., rear R.H.) on the ends of the camshafts.7. Fasten a hoist to rear camshaft (8). Install spacer (10) and rear camshaft (8) on front camshaft