3406E On-Highway Engine Caterpillar


Pistons and Connecting Rods - Disassemble

Usage:

3406E 1MM

Disassembly Procedure

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

  1. 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.


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


One-piece piston



    Illustration 1g01033568

  1. Remove bearings (5) from connecting rod (4) and connecting rod cap (6).

  2. Use Tooling (A) to remove retaining ring (2).

  3. Remove pin (3) and separate piston (1) from connecting rod (4).

  4. Use Tooling (B) to remove the piston rings from piston (1).

Two-piece piston



    Illustration 2g01033611

  1. Remove bearings (16) from connecting rod (12) and connecting rod cap (17). Remove dowel (18) from connecting rod cap (17).

  2. Use Tooling (A) to remove retaining ring (14).

  3. Remove pin (15) and connecting rod (12) from the piston.

  4. Use Tooling (B) to remove piston rings (7), (8), and (9) from the piston.

  5. 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.

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