COVER AS 3531964 - Caterpillar

3304 Engine Shown1. Remove bolts (1) and the washers that hold rocker shaft assembly (2) in position.2. Remove rocker shaft assembly (2). Remove the O-ring seal from the rear rocker arm support bracket.3. Put identification marks on push rods (3) as to their location in the engine. Remove the push rods.Install Rocker Shaft Assembly & Push Rods
3304 Engine Shown1. Install push rods (1). Make sure they are in their original location in the engine and in position in the valve filters.
Loosen the adjusting screws on the rocker arms. This will prevent a bent valve or push rod during installation of the rocker shaft assembly.
2. Install a new O-ring seal in the rear rocker arm support bracket. Put 4C-5593 Thread Compound on all of the bolts that hold the rocker shaft assembly in position except for the bolt that goes through the rear rocker arm support bracket.3. Put rocker shaft assembly (2) in position on the engine. Make sure the dowels in the support brackets are in alignment with the dowel holes in the cylinder head. Make sure the rocker arms are engaged with the push rods.4. Install the bolts and washers that hold the rocker shaft assembly in position, and tighten them until they are finger tight.
3304 Engine Sequence
3306 Engine Sequence5. Tighten the bolts that hold the rocker shaft as follows: a. Tighten the bolts in number sequence to a torque of 156 N m (115 lb ft).b. Tighten the bolts in number sequence to a torque of 250 17 N m (185 13 lb ft).c. Tighten the bolts again in number sequence to a torque of 250 17 N m (185 13 lb ft).6. See the topic "Valve Clearance Setting" in the Systems Operation Testing & Adjusting Manual. Make an adjustment to the valves so the inlet valves have 0.38 mm (.015 in) clearance and the exhaust valves have 0.64 mm (.025 in) clearance.End By:a. install valve cover