HEAD ASSEM. 9N0320 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Piston Ring Expander 1 Start By:
Remove the pistons and the connecting rods. Refer to Disassembly and Assembly, "Piston and Connecting Rods - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Make a temporary mark on the components of the piston and connecting rod assembly. This will ensure that the components of each piston and connecting rod assembly can be reinstalled in the original cylinder. Mark the underside of the piston on the front pin boss. Do not interchange components.
Illustration 1 g01244067
Illustration 2 g01253091
Typical example
Place the piston and connecting rod assembly on a suitable surface with the connecting rod upward. Use Tooling (A) in order to remove circlips (5). Note: Forged Marks (X) identify the front of the connecting rod assembly. The forged marks should be used for the purposes of orientation.
Remove piston pin (8) and connecting rod (6) from piston (4). Note: If the piston pin cannot be removed by hand, heat the piston to a temperature of 45 5 °C (113 9 °F). Do not use a torch to heat the piston. Note the orientation of the connecting rod and the piston.
Place the piston on a suitable surface with the crown upward. Use Tooling (B) in order to remove compression rings (1) and (2), and oil control ring (3) from piston (4). Note: Identify the position and orientation of compression rings (1) and (2), and oil control ring (3).
Illustration 3 g01244068
Remove bolts (12) and connecting rod cap (11) from connecting rod (6). Discard the bolts. Note: Fracture split connecting rods should not be left without the connecting rod caps installed. After the disassembly procedure for the piston and connecting rod is completed, carry out the assembly procedure and the installation procedure as soon as possible. Refer to Disassembly and Assembly, "Piston and Connecting Rods - Assemble" and Disassembly and Assembly, "Piston and Connecting Rods - Install".
Remove the lower half of connecting rod bearing (10) from connecting rod cap (11). Remove the upper half of connecting rod bearing (9) from connecting rod (6). Keep the connecting rod bearings together.
Removal of the piston pin bushing in the connecting rod must be carried out by personnel with the correct training. Also special machinery is required. For more information refer to your authorized Caterpillar dealer.
Inspect the connecting rod for wear or damage. If necessary, replace connecting rod (6) or replace bush (7) for the piston pin. Note: If the connecting rod or the bush for the piston pin are replaced, first identify the height grade of the connecting rod. Refer to Specifications, "Connecting Rods".
Repeat Step 1 through Step 7 in order to disassemble the remaining pistons and connecting rods.