HARNESS AS 2299765 - Caterpillar

1. Remove bolts (1) and lift shaft (2) and the rocker arms off the valve cover base and the push rods. 2. Remove push rods (3) from the valve lifters and valve cover base. Identify the push rods to allow for reassembly in their original locations. 3. Remove bridge assemblies (4) from the dowels.Install Rocker Shaft Assemblies & Push Rods
Also see the topic "Bridge Adjustment", in the Systems Operation/Testing & Adjusting Manual, Form No. SENR5596, for additional information.
Typical Example1. Loosen the adjustment nuts and screws (1) on valve bridges (2).2. Put clean engine oil on the bridge dowels, the inside diameter of valve bridges (2) and on the top pad of the valve bridge. Install valve bridges (2) on the bridge dowels as shown.3. While bridges (2) are pushed straight down with a force of 5 to 45 N (1 to 10 lb.) on the top contact surface, turn adjustment screw (1) until it makes contact with the valve stem. Turn screw (1) another 1/31/2 20°to 30° ( to hex on nut). This will straighten the dowel in the guide and compensate for clearance (slack) in the threads.4. Hold adjustment screw (1) in position, and tighten the nut around screw (1) to a torque of 30 4 N m (22 3 lb. ft.).
Typical Example
Install the push rods in their original location in the engine.
5. Put clean engine oil on the push rods and in the lifter cups for the push rods. Put push rods (3) in position in the valve lifters.
Make sure the crankshaft and camshafts are in time with each other and that adjustment screws (5) are turned all the way out before the rocker shaft bolts are tightened or damage to the valves or pistons can be the result. Refer to the topic "Install Camshafts" in this module.
Typical Example6. Put the rocker arms and shaft (4) in position on the valve cover base. Make sure the rocker shafts and push rods are in alignment, and install the bolts to hold shaft (4). Tighten the bolts to a torque of 120 20 N m (90 15 lb. ft.).7. Make an adjustment to the bridges. See the topic "Bridge Adjustment" in Systems Operation/Testing & Adjusting Manual for further information.8. Adjust the valve lash for the intake and exhaust valves and set the injection pump timing. See the topic "Valve Lash Adjustment", in the Systems Operation/Testing & Adjusting Manual, Form No. SENR5596, for additional information.9. Tighten the adjusting screw locknuts on the rocker arms to a torque of 70 15 N m (50 11 lb. ft.).End By:a. install valve covers