NUT 4L1250 - Caterpillar

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-0510 Driver Group 1
Illustration 1 g01004555
Oil holes
Illustration 2 g01004558Note: Make sure that the sleeve bearing and the bore of the rocker arm are thoroughly clean.
The sleeve bearing and the rocker arm have oil supply holes. The holes must be aligned when the bearing is installed in the rocker arm. Align the joint of the bearing toward the top of the rocker arm. Align the oil hole in the bearing with the oil hole in the rocker arm. Use Tooling (A) to install the sleeve bearing in rocker arm (2).After the bearing is installed, measure the bore of the bearing. The bore must be 45.056 0.015 mm (1.7740 0.0006 inch).
Align the scribe mark on socket (3) with the scribe mark on rocker arm (2). Press socket (3) fully into rocker arm (2).
Illustration 3 g01004562
Place retaining ring (7) on button (5). Install button (5) in socket (3).
Install adjustment screw (4) and the nut on rocker arm (2).
Illustration 4 g06155582
If the dowel was removed from shaft (1), install a new dowel. The dowel must project 6.0 mm (0.24 inch) above the surface of shaft (1).
Coat the bearings of rocker arms (2) and coat shaft (1) with clean engine oil. Install rocker arms (2) on shaft (1).End By:
Install the rocker shaft assemblies. Refer to Disassembly and Assembly, "Rocker Shaft and Push Rods - Install".