CONNECTOR-PLUG 4G2544 - Caterpillar

Remove & Install Rocker Shaft Assembly & Push Rods
Start By:a. remove valve cover
Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.
The spark plug covers have been removed for photographic purposes only. It is not necessary to remove the spark plug covers for this procedure. 1. Remove six bolts and washers (1).2. Remove rocker shaft assembly (3). 3. Put identification marks on push rods (2) as to their location in the engine.4. Remove twelve push rods (2).5. Remove the O-ring seal from the rear rocker arm support bracket. The following steps are for the installation of the rocker shaft assembly and push rods. 6. Loosen twelve adjusting screws (4). This will prevent a bent valve or push rod during installation of rocker shaft assembly (3).7. Install twelve push rods (2). The O-ring seal in the rear support must be installed new each time the bolt is removed from the rear support bracket.8. Install rocker shaft assembly (3).
Make sure the dowels on each end of the rocker shaft assembly are in alignment with the holes in the cylinder head.
9. Put 6V-4876 Molykote Lubricanton all of bolts (1) except for bolt (10) that goes through the rear rocker arm support bracket. Install the bolts in the rocker shaft assembly.10. Tighten bolts (1) for the rocker shaft as follows:a. Tighten all the bolts in number sequence to a torque of 155 N m (115 lb ft).b. Tighten all the bolts again in number sequence to a torque of 250 17 N m (185 13 lb ft).c. Last, tighten bolts again in number sequence (hand tighten only) to a torque of 250 17 N m (185 13 lb ft).11. The assembled length of springs at both ends of rocker shaft must be 1.50 0.25 mm (.059 .010 in).Remove or install washers behind springs to change the assembled length of the springs.12. Make adjustments until the inlet valve clearance is 0.38 0.08 mm (.015 .003 in)and the exhaust valve clearance is 0.76 0.08 mm (.030 .003 in). See the topic "Valve Clearance Setting" in Testing & Adjusting. Tighten the locknuts for the adjusting screws (3) to a torque of 29 7 N m (21 5 lb ft).End By:a. install valve cover.Disassemble & Assemble Rocker Shaft Assembly
Start By:a. remove rocker shaft assembly and push rods
Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.
1. Remove O-ring seal (5). A replacement of the O-ring seal must be made each time the head bolt is removed from the rear support bracket.2. Remove retainer ring (1), washer (2), washer spring (3) and rocker arm (4). 3. Remove the pin from the rear support bracket with a hammer and punch. Remove rear support bracket (6).4. Remove remaining rocker arms (4), washers (2), springs (7), washer spring (3) and shaft brackets (8).5. Remove shaft plugs from each end of