PIN-SPRING 1381645 - Caterpillar

Remove Rocker Shaft Assembly And Push Rods
Start By:a. remove valve cover 1. Use tool (A) to turn the crankshaft to release any pressure against the rocker arms.2. Use tool (B) to remove push rods (1). 3. Remove valve bridges (2). Put identification on the valve bridges as to their location for correct installation. 4. Remove bolts (3) and rocker shaft assembly (4).Install Rocker Shaft Assembly And Push Rods
1. Put rocker shaft assembly (1) in position on the engine. The tightening sequence in Step 2 is for 3408 engines only.2. Put clean engine oil on all the bolts that hold the rocker shaft assembly in position. Install bolts (2), (3), (4) and (5). Use the following procedure to tighten the bolts.a. Tighten bolts (2) through (5) in numerical sequence to 271 27 N m (200 20 lb.ft.).b. Tighten bolts (2) through (5) in numerical sequence to 447 20 N m (330 15 lb.ft.).c. Do Step 2b again to make sure all the bolts are tightened to the correct torque. The tightening sequence in Step 3 is for 3412 engines only.3. Put clean engine oil on all the bolts that hold the rocker shaft assemblies in position and install them on the rocker shaft assemblies. Use the following procedure to tighten the bolts.a. Tighten bolts (6) through (11) in numerical sequence to 270 25 N m (199 18 lb.ft.).b. Tighten bolts (6) through (11) in numerical sequence to 450 20 N m (332 15 lb.ft.).c. Do Step 3b again to make sure all the bolts are tightened to the correct torque. 4. Put clean engine oil on the valve bridge dowels. Install valve bridges (5) in their original position on the engine. Use the following procedure to adjust the bridges.a. Put clean SAE 40 engine oil on the lubrication passage of the bridge.b. Back off the adjusting screw. Press straight down on the top contact surface of the bridge with a force of 40 to 60 N (9 to 13 lb.).c. Turn the adjusting screw clockwise until the oil film in the lubrication passage of the valve bridge moves inward, indicating the adjusting screw has made contact with the valve stem.d. Turn the screw an additional 15° to 25° (1/3 of a flat on the hex nut), to equalizer clearance with the dowel.e. Hold the adjusting screw in this position, and tighten the locknut to a torque of 85 to 115 N m (65 to 85 lb.ft.). 5. Use tool (A) to make sure there will be no pressure against push rod (6) and the rocker arm. Use tool (B) to pull rocker arm away from the push rod. Put push rod (6) in position under the rocker arm. If the rocker arm can not be moved enough to put the push rod in position, turn the crankshaft with tool (A).6. Make an adjustment of the valves to have a clearance of .038 mm (.015 in.) for intake and 0.76 mm (.030