CORE AS 0854974 - Caterpillar

preparatory steps: a) remove valve liftersb) remove timing gear cover1. Rotate the crankshaft until the "C" mark on the crankshaft gear (1) is aligned with the "C" mark on the camshaft gear (2).2. Mark the mating teeth of the accessory drive shaft gear and idler gear at location (A). Mark the mating teeth of idler gear and camshaft gear at location "B". This will insure proper fuel injection pump camshaft timing during installation of camshaft.3. Remove the camshaft retaining bolts (3), lock, and thrust washer.4. Slide the camshaft and gear out of the cylinder block.Install Camshaft
1. Thoroughly lubricate the lobes and bearing journals of the camshaft with clean SAE 30 engine oil.2. Install the camshaft in the cylinder block with timing marks aligned on the accessory drive shaft gear, idler gear, camshaft gear, and crankshaft gear.3. Install the camshaft retaining bolts, lock, and thrust washer. If any of the above four timing gears have been replaced, it will be necessary to time the accessory drive shaft. See REMOVE AND INSTALL FUEL INJECTION PUMP HOUSING AND GOVERNOR AS A UNIT.concluding steps: a) install timing gear coverb) install valve lifters