SPIDER ASSEM. 6N4252 - Caterpillar

Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 390-1131 Timing Pin (Crankshaft) 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that all components are clean and free from damage. If necessary, replace any components that are worn or damaged.
If Tooling (A) is not installed, install Tooling (A). Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Remove" for the correct procedure.
Illustration 1 g02942696
Illustration 2 g02942756
If necessary, install dowel (7) (not shown).
Apply clean engine oil to wear caps (3). Install the wear caps to the valve stems. Note: If the wear caps were previously used, the wear caps must be installed in the original location.
Apply clean engine oil to both ends of push rods (5). Install the push rods into the cylinder head. Note: If the push rods have previously been used, the push rods must be installed in the original location.Note: Ensure that the push rods are seated in the cups of the lifters
Position rocker shaft assembly (4) onto the cylinder head.
Install bolts (6) to rocker shaft assembly (4). Tighten the bolts in the numerical sequence that is shown in Illustration 2 to a torque of 10 N m (89 lb in). Note: Ensure that the rocker arms are seated in the cups of the push rods.Note: Ensure that the wear caps are not displaced from the valve stems when the rocker shaft assembly is installed.
Illustration 3 g02942738
Remove Tooling (A) from the cylinder block.
Install new O-ring seal (1) onto plug (2).
Install plug (2) into Position (Z) in the cylinder block. Tighten the plug to a torque of 30 N m (266 lb in). End By:
Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure.