TUBE ASSEM. 9K4443 - Caterpillar

Remove & Install Pistons & Connecting Rods
Start By:a. remove cylinder head assembliesb. remove piston cooling tubes 1. Remove the carbon from the top inside of the cylinder liners.2. Turn the crankshaft until two pistons are at bottom center.3. Remove bearing caps (1) from the two connecting rods. Put pieces of rubber hose or tape on the threads of the connecting rod bolts as protection for the crankshaft. Put identification on each bearing cap so it will be installed on the correct connecting rod.
Typical Example4. Push the pistons up until the piston rings are clear of the cylinder liner. Remove pistons and connecting rods (2).
Do not turn the crankshaft while any of the connecting rods are in the engine without the caps installed. Do not damage the cooling tubes when the pistons are removed.
5. Do Steps 1 through 4 for the remainder of the pistons and connecting rods. The following steps are for the installation of the pistons and connecting rods. 6. Be sure that when the pistons and connecting rods are installed the flat surfaces of the connecting rods (2) are toward each other and the chamfered sides (1) are toward the crankshaft. 7. Put clean engine oil on the piston rings and cylinder liners.8. Put two pistons and connecting rods in position opposite each other in the correct bore of the block. Install pistons and connecting rods (3) with Tool (A).
Typical Example For more detail about checking bearing clearances and installation of connecting rod bearings, see Remove & Install Connecting Rod Bearings.9. Check the bearing clearances with Plastigage.10. Put 4C-5593 Thread Compound on the connecting rod bearing bolts. Install bearing caps (1) and nuts (4) finger tight. Make sure flat side of each cap is toward the other cap. The chamfered side must be toward the crankshaft. Tighten each nut to a torque of 80 8 N m (60 6 lb ft). Put a mark across the nuts and bolts. Tighten each nut 120 degrees more.
Do not use an impact wrench to tighten the nuts the additional 120 degrees.
11. Check the side clearance between two connecting rods on the same crankshaft journal. Clearance must be 0.28 to 0.84 mm (.011 to .033 in) for new rods.12. Do Steps 6 through 11 for the remainder of the pistons and connecting rods.End By:a. install piston cooling tubesb. install cylinder head assembliesDisassemble & Assemble Pistons & Connecting Rods
Start By:a. remove pistons and connecting rods 1. Remove bearings (3) from the connecting rod and connecting rod cap.2. Remove retainer ring (2) with Tool (A).3. Remove pin (1) and connecting rod (4) from the piston. 4. Remove the piston rings (5) from the piston with Tool (B). Clean the piston ring grooves on the pistons with an acceptable ring groove cleaning tool. See the topic "Use Of Piston Pin Bearing Removal & Installation Tools/eq, Special Instructions SMHS7295.5. Heat the connecting rod (4) in an oven to a temperature of 177-260 °C (350-500 °F). Never use a direct flame to