BUSHING 2126694 - Caterpillar

Remove Rocker Shaft And Push Rods
START BY:a) remove valve covers 1. Use tool (A) and remove fuel lines (1).2. Cap all fuel line openings. 3. Remove bolts (2) and rocker shaft (3) from the cylinder head. 4. Remove push rods (4) from the cylinder head.5. Remove bridges (5) from the cylinder head.Install Rocker Shafts And Push Rods
1. Put clean engine oil on the dowels, inside diameter of bridges (1) and on the top pads of the bridges.2. Install bridges (1) on the dowels of the cylinder head. Keep pressure by hand on bridges (1) and turn the adjustment screw clockwise until contact is made with valve stem. Turn the screw an extra 20° to 30°. This will make the dowel straight in the guide and make compensation for gap (slack) in the threads. Hold adjustment screw in this position and tighten the locknut to a torque of 28 4 N m (22 3 lb.ft.). 3. Install push rods (2) as shown. 4. Put rocker shaft (3) in position on the push rods and the bridges.5. 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 270 25 N m (200 20 lb.ft.). Start with the bolt in center of rocker shaft. Tighten bolts again to a torque of 450 20 N m (330 15 lb.ft.). Tighten bolts again by hand to 450 20 N m (330 15 lb.ft.).6. Make adjustment of valves to get a clearance of 0.38 mm (.015 in.) for intake, and 0.76 mm (.030 in.) for exhaust. Tighten the locknuts to a torque of 28 4 N m (22 3 lb.ft.) and check valve clearance again.
Do not cause damage to the O-ring seals on the inner fuel lines.
7. Use tooling (A) and install inner fuel lines (5) and tighten them to a torque of 40 7 N m (30 5 lb.ft.).