FITTING GP-HYDRAULIC 5089815 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Ring Expander 1 Start By:
Remove the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and Connecting Rods - Remove" for the correct procedure.
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. Make a temporary mark will ensure that the components of each piston and connecting rod assembly can be reinstalled in the original cylinder. Mark the front of the piston and the front of the connecting rod. Do not interchange components.
Illustration 1 g01311807
Place the piston and connecting rod assembly on a suitable surface with the connecting rod upward. Use Tooling (A) in order to remove retaining rings (4).
Remove piston pin (3) and connecting rod (1) from piston (2). 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.
Illustration 2 g03341230
Illustration 3 g01311809
Place the piston on a suitable surface with the crown upward. Use Tooling (B) in order to remove compression rings (5) and (6), and oil control ring (7) from piston (2). Note: Identify the orientation of the piston rings for installation.
Illustration 4 g01311837
Remove nuts (11) and connecting rod cap (10) from connecting rod (1).
Remove the lower half of connecting rod bearing (9) from connecting rod cap (10). Remove the upper half of connecting rod bearing (8) from connecting rod (1). Keep the bearing shells 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 Cat dealer.
Inspect the connecting rod for wear or damage. If necessary, replace the connecting rod or replace the bush for the piston pin.