3406E On-Highway Engine Caterpillar

Pistons and Connecting Rods - Disassemble

Usage:

Disassembly Procedure

Show/hide table

Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-1861⁽¹⁾ or 139-9039⁽²⁾	Retaining Ring Pliers	1
B	7M-3978⁽³⁾ or 149-7179⁽⁴⁾	Ring Expander	1
B	7M-3978⁽³⁾ or 149-7179⁽⁴⁾	Ring Expander	1

Show/hide table

⁽¹⁾	Use with one-piece piston
⁽²⁾	Use with two-piece piston
⁽³⁾	Use with C-15 Engines
⁽⁴⁾	Use with C-16 Engines

Start By:

Remove the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and Connecting Rods - Remove" for the procedure.

Note: Mark the components of each piston and connecting rod assembly. The components must be reinstalled in the original location. Do not interchange components.

Show/hide table

NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

One-piece piston

Show/hide table




Illustration 1	g01033568

Remove bearings (5) from connecting rod (4) and connecting rod cap (6).
Use Tooling (A) to remove retaining ring (2).
Remove pin (3) and separate piston (1) from connecting rod (4).
Use Tooling (B) to remove the piston rings from piston (1).

Two-piece piston

Show/hide table




Illustration 2	g01033611

Remove bearings (16) from connecting rod (12) and connecting rod cap (17). Remove dowel (18) from connecting rod cap (17).
Use Tooling (A) to remove retaining ring (14).
Remove pin (15) and connecting rod (12) from the piston.
Use Tooling (B) to remove piston rings (7), (8), and (9) from the piston.
Separate piston crown (11) from piston skirt (13).

Note: Piston pin bearing (10) will be pushed out of connecting rod (12) during installation of the new bearing. Refer to Disassembly and Assembly, "Pistons and Connecting Rods - Assemble" for the procedure.