PLUG 2051258 - Caterpillar

(1) Locknut. Tighten locknut to a torque of ... 25 7 N m (18 5 lb ft)(2) Valve rocker arm assembly.(3) Valve clearance (with engine stopped). Intake valves ... 0.38 mm (.015 in)Exhaust valves ... 0.64 mm (.025 in) After setting valve clearance, tighten adjusting screw locknut to a torque of 25 7 N m (18 5 lb ft). Then, recheck the valve clearance.(4) Rocker arm shaft. Diameter of shaft (new) ... 30.000 0.010 mm (1.1811 .0004 in)(5) Valve bridge assembly.Bridge Installation Instructions: a. Lubricate bridge dowel, bridge bore and top pad of bridge with engine oil.b. Install bridge assembly on bridge dowel.c. While firmly pressing [0.5 to 4.5 kg (1 to 10 lb)] straight down on the bridge pad, turn the adjusting screw clockwise until contact is made with the valve stem.d. Turn the screw clockwise and additional 45° (1/8 turn) to straighten the dowel in the guide and compensate for slack in the threads.e. Hold the adjusting screw in this position and tighten the locknut to a torque of 25 7 N m (18 5 lb ft).(6) Lifter group shaft. Diameter of shaft (new) ... 20.000 0.010 mm (.7874 .0004 in)Bore diameter in body of valve lifter assembly ... 20.050 0.015 mm (.7894 .0006 in)(7) Valve lifter assembly.