SPOOL-SHACKLE 1438698 - Caterpillar

1. Install the connecting rod (4) in the piston with the bearing tab groove (slot) (1) on the same side as the cutout (depression) (3) on the head of the piston.2. Install piston pin (2) and retaining rings (5) in piston.3. When old pistons are to be used, clean the piston grooves with an acceptable piston groove cleaning tool. 4. Install the spring for the oil ring. Install the oil ring with tool (A). The gap in the ring must be approximately 180° from the oil ring spring connections.5. The two compression rings have marks "UP-1" and "UP-2". The rings must be installed with these marks toward the top of the piston with "UP-1" as the top ring. After installation of all three piston rings, put piston rings in position so gaps in rings are 120° apart. Compression rings that do not have identification can be installed either way.6. To check the clearance between the piston ring grooves and rings, see SPECIFICATIONS.7. See SPECIFICATIONS to check the clearance between the ends of the piston rings (end gap).end by:a) install pistons