SETSCREW-SOCKET 0951280 - Caterpillar

Remove Rocker Shafts And Push Rods
start by: a) remove valve covers
MARINE ENGINE1. Remove valve cover bases (2).
INDUSTRIAL ENGINE2. Remove inner fuel lines (1). Install protection caps on all fuel line openings.
MARINE ENGINE3. Remove three bolts (3) that hold rocker shaft assembly to cylinder head.4. Remove rocker shaft assembly (4).
INDUSTRIAL ENGINE5. Remove push rods (5) from valve lifters.6. Remove bridges (6) from dowels in cylinder head.Install Rocker Shafts And Push Rods
1. Put clean engine oil on the dowels for the bridges.
MARINE ENGINE2. Install the bridges (1) on dowels. Keep pressure by hand on the bridges and turn the adjustment screw clockwise until contact is made with valve stem. Turn the screw an extra 20° to 30°. This will make dowel straight in guide and make compensation for gap (slack) in the threads. Hold adjustment screw in this position and tighten locknut to a torque of 22 3 lb.ft. (28 4 N m).
INDUSTRIAL ENGINE
MARINE ENGINE3. Install the push rods (3).4. Install rocker shaft assembly (2).
INDUSTRIAL ENGINE5. Put clean engine oil on threads of cylinder head bolts. Install the bolts (4) that hold rocker shaft assembly and tighten the three bolts first to a torque of 200 20 lb.ft. (270 25 N m). Start with the bolt in center of rocker shaft. Tighten bolts again to a torque of 330 15 lb.ft. (450 20 N m). Tighten bolts again by hand to 330 15 lb.ft. (450 20 N m).6. Install inner fuel lines (5). Use tool (A) to tighten the fuel line nuts to a torque of 30 5 lb.ft. (40 7 N m).
Do not cause damage to the O-ring seals on the inner fuel lines.
7. Make adjustment of valves to get a clearance of .015 in. (0.38 mm) for intake, and .030 in. (0.76 mm) for exhaust.8. Install valve cover bases.end by:a) install valve covers