AIR COMPRESSOR GP 4P0676 - Caterpillar

Remove Pistons
start by:a) remove cylinder headb) remove oil pump1. Remove the carbon ridge from top inside surface of cylinder liners.2. Turn the crankshaft until two pistons are at bottom center. 3. Remove the nuts (1) and the bearing caps. Push the rod and pistons up until rings are away from the liners. 4. Remove pistons (2) and connecting rods from cylinder liners.5. Do Steps 1 through 4 for remainder of the pistons.Install Pistons
1. Put clean engine oil on piston rings, connecting rod bearings and cylinder liners. 2. Use compressor (A) to install pistons in cylinder liners. Be sure the numbers on connecting rods are on the opposite side from the camshaft.3. Install the bearing caps on connecting rods with number on side of bearing caps on the same side, and same number as on connecting rod. 4. Put 2P2506 Thread Lubricant on the connecting rod bolts. Install the nuts and tighten to a torque of 60 6 lb. ft. (80 8 N m). Put a mark on nuts and cap. Tighten an extra 120° 5° from the mark.end by:a) install oil pumpb) install cylinder headDisassemble And Assemble Pistons
start by:a) remove pistons 1. Remove bearings (2) from the connecting rod and connecting rod cap.2. Remove retainer ring (1). Remove piston pin (3) from the piston and connecting rod. 3. Use tool (A) to remove the piston rings (4) from the piston. 4. Heat the connecting rod to a temperature of 350°-400°F (176-204°C). Put connecting rod (6)