FILTER-ENGINE OIL 1R1808 - Caterpillar

Remove Rocker Arm Shaft Assemblies
ROCKER ARM SHAFT ASSEMBLY
1. Retaining bolts, clamps, and locks (four each head). 2. Fuel return manifold (one each head).1. Remove valve cover.2. Remove fuel return manifold retaining bolts (1). Remove the fuel return manifold (2).3. Remove the rocker arm shaft assembly (3). Remove push rods (4).
REMOVING ROCKER ARM SHAFT ASSEMBLY (Typical Example)
3. Rocker arm shaft assembly (one each head). 4. Push rods (eight each head).Install Rocker Arm Shaft Assemblies
1. Lubricate the cam followers, push rods, and rocker arm shaft assembly with engine oil (SAE 30).2. Install the push rods. Position the rocker arm shaft assembly and fuel return manifold on cylinder head.3. Install the fuel return manifold and rocker arm shaft assembly retaining bolts, clamps, and locks. Tighten bolts to 18 5 lb.ft. (2.5 0.7 mkg) and bend the locks.4. Adjust the intake valve clearance to .015 in. (0.38 mm) and the exhaust valve clearance to .025 in. (0.64 mm).5. Install valve cover. Install valve cover retaining bolts and tighten bolts to 120 24 lb.in. (138 28 cm.kg).Disassemble Rocker Arm Shaft Assembly
1. Remove retaining bolts and locks from each end of rocker arm shaft assembly and disassemble the rocker arm shaft assembly.
ROCKER ARM SHAFT ASSEMBLY DISASSEMBLED (Typical Example)
1. Rocker arm shaft. 2. Rivet. 3. Washers (eight). 4. Rocker arms (two per cylinder). 5. Adjusting screw. 6. Bracket. 7. Oil supply hole.Assemble Rocker Arm Shaft Assembly
1. The oil holes in shaft (1), arms (4) and bracket (6) must be clean and free of dirt or foreign material.2. Install adjusting screws (5) into rocker arms (4) so they extend .44 in. (11.2 mm) below arm. This will avoid forcing valves into piston crowns when rocker arm assembly is installed on cylinder head.3. Install arms (4) on shaft with washers (3) positioned as shown.
ROCKER ARM SHAFT ASSEMBLY (Typical Example)
1. Rocker arm shaft. 2. Rivet. 3. Washers (eight). 4. Rocker arms (two per cylinder). 5. Adjusting screw. 6. Bracket. 7. Oil supply hole.4. Position shaft (1) and arms (4) into bracket (6) so screws (5) are on the same side of bracket (6) as oil supply hole (7). Rivet (2) must be on top when shaft (1) is positioned into bracket (6). Later rocker arm shaft assemblies do not have rivet (2) but do have machined flats (8). The machined flats must be on top when shaft (1) is positioned into bracket (6).
LATER ROCKER ARM SHAFT ASSEMBLY
1. Rocker arm shaft. 6. Bracket. 8. Machined flats (four per shaft).