FAN AS 1852639 - Caterpillar

Removal Procedure
Start By:
Remove the engine. Refer to Disassembly and Assembly, "Engine - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
The engine should be mounted on a suitable stand and placed in the inverted position.
Remove the rockershaft and pushrods. Refer to Disassembly and Assembly, "Rocker shaft and Pushrod - Remove".
Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove".
Illustration 1 g01340531
Remove thrust washer (1) from the cylinder block. Do not remove dowel (2) from the cylinder block unless the dowel is damaged. Note: The thrust washer has two Slots (X).
Illustration 2 g01616234
Do not damage the lobes or the bearings when the camshaft is removed or installed.
Carefully remove camshaft (3) from the cylinder block.
If necessary, remove key (4) from camshaft (3). Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Clean the camshaft and the thrust washer. Inspect the camshaft and the thrust washer for wear and for damage. Refer to Specifications, "Camshaft" for more information. Replace any worn components or any damaged components.
Clean the camshaft bearing in the cylinder block. Inspect the camshaft bearing for wear and for damage. Refer to Specifications, "Camshaft Bearings" for more information. If necessary, replace the camshaft bearing. Refer to Disassembly and Assembly, "Camshaft Bearing - Remove and Install".
It is strongly recommended that all lifters should be replaced when a new camshaft is installed.
Inspect the lifters for wear and for damage. Refer to Specifications, "Lifter Group" for more information. Replace any worn lifters or any damaged lifters. Refer to Disassembly and Assembly, "Lifter Group - Remove and install".
Illustration 3 g01616234
If necessary, install a new key (4) into camshaft (3).
Lubricate the bearing surfaces of camshaft (3) and lubricate the lobes of the camshaft with clean engine oil.
Do not damage the lobes or the bearings when the camshaft is removed or installed.
Carefully install camshaft (3) into the cylinder block.
Illustration 4 g01167327
Lubricate the thrust washer with clean engine oil. Align slot (X) in thrust washer (1) with dowel (2) in the cylinder block. Install thrust washer (1) into the recess in the cylinder block. Note: The thrust washer has two Slots (X).
Install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install".
Install the rockershaft and pushrods. Refer to Disassembly and Assembly, "Rocker shaft and Pushrod - Install". End By:
Install the engine. Refer to Disassembly and Assembly, "Engine - Remove".