FRAME AR-UNDERCARRIAGE 2291898 - Caterpillar

Illustration 6 g00700079
Make sure that Dimple (X) on top of the piston is oriented toward the center of the cylinder block when the piston is installed. Carefully lower the piston and connecting rod into the cylinder liner. Observe the installation of the piston and connecting rod at the top and bottom. Make sure that there are no points of interference.
Do not use excessive force in order to move the piston into the cylinder liner. Piston ring breakage may occur.
Gently tap the piston with a rubber mallet in order to move the piston rings away from the piston ring compressor and into the cylinder liner. The movement should occur with little force. Lower the piston and connecting rod close to the crankshaft. Allow enough clearance for installation of the connecting rod bearing.If the piston will not move into the cylinder liner, remove the piston and the connecting rod. Inspect the piston and the piston rings.Note: The clips for the connecting rod bearing may not be reused. Ensure that the connecting rod bearing is assembled with new clips and that the clips are secure in the connecting rod bearing. The clip must not protrude from the back of the connecting rod bearing.
Liberally coat the inner diameter of the connecting rod bearing and the outer diameter of the crankshaft journal with clean engine oil. Use the clips to assemble both halves of the connecting rod bearing at the correct position on the journal. Make sure that the clips are secure. Refer to Specifications, "Connecting Rod" for more information.
Remove the towels from the connecting rod. Ensure that debris or residue from the towels cannot contaminate the engine.
Use a cloth that is dampened with clean engine oil to apply a light coat of oil onto the outer diameter of the connecting rod bearing.
Make sure that the connecting rod is aligned with the crankshaft. Slowly lower the connecting rod onto the connecting rod bearing.
It is very important that the dowel in the connecting rod bearing is inserted into the slot in the connecting rod. If the dowel is not inserted into the slot, damage to the engine will occur.
Rotate the connecting rod bearing until the dowel in the connecting rod bearing is inserted into the slot in the connecting rod. The connecting rod bearing must be moved away from the back of the slot in the connecting rod in order to allow a clearance of 0.5 mm (0.02 inch) between the dowel and the rear of the slot. Once the connecting rod is in place on the connecting rod bearing, the crankshaft will need to be rotated in order to allow the connecting rod cap to be assembled to the connecting rod. The gap between the slot in the connecting rod and the locating dowel must be verified for proper clearance of 0.5 mm (0.02 inch).Note: Always control the length of the connecting rod bolts. The length of a new bolt is 245 0.1 mm (9.6 0.004 inch). This distance is measured from