C3.3B Tier 4 Interim and EU Stage 3A Engines for Caterpillar Built Machines – Rocker Shaft and Push Rod – Remove and Install

Removal Procedure

Start By:

1. Remove valve mechanism cover.

Note: Refer to Specification UENR0995 "Engine Design" for non-specified engine Torque Values.

Illustration 1	g02795549

1. Remove bolts (3) and tube assembly (4) .

2. Remove bolts (2) and brackets (1) .

Illustration 2	g02795551

3. Remove bolts (6) from rocker shaft assembly (5) .

4. Remove rocker shaft assembly (5) from cylinder head (8) .

5. Place an identification mark on pushrods (7) in order to show the location. Remove pushrods (7) from cylinder head (8) .

   Note: Identification will ensure that the pushrods can be reinstalled in the original positions. Do not interchange the positions of used pushrods.

6. Remove valve bridge arms (9) .

Installation Procedure

1. Install rocker shaft assembly (5) and pushrods (7) in the reverse order of removal.

   1. For the C3.3B Install bolts (6) and tighten to a torque of 49 to 55 N·m (37 to 41 lb ft).

   2. For the C2.6 Install bolts (6) and tighten to a torque of 24 to 27 N·m (18 ± 20 lb ft).

   3. Position brackets (1) and install bolts (2) and tighten bolts (2) to a torque of 24 to 27 N·m (18 to 20 lb ft) .

2. Position tube assembly (4) and install bolts (3) and tighten bolts (3) to a torque of 9.8 to 11.2 N·m (87 to 100 lb in).

3. Adjust the inlet valve lash and the exhaust valve lash to 0.13 to 0.17 mm (0.005 to 0.007 inch). Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".