Pistons and Connecting Rods

TM 9-2320-312-24-2

Truck Engine

Disassembly and Assembly Section

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Pistons and Connecting Rods

- Remove

SMCS Code: 1225-011

Removal Procedure

Start By:

a. Remove the cylinder head. Refer to Disassembly

and Assembly, "Cylinder Head - Remove".

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b. Remove the engine oil pump. Refer to

Illustration 210

Disassembly and Assembly, "Engine Oil Pump -

1. Remove bolt (1) and piston cooling jet (2) from

Remove".

each cylinder.

c. Remove the piston cooling jets. Refer to

Disassembly and Assembly, "Piston Cooling Jets

Installation Procedure

- Remove and Install".

NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened

component life.

Note: For information on reusability of the pistons,

refer to the following list.

Guideline For Reusable Parts And Salvage

Operations, SEBF8049, "Pistons"

Guideline For Reusable Parts And Salvage

Operations, SEBF8290, "Visual Inspection of

Two-Piece Pistons"

Tool Operating Manual, NEHS0775, "Using the

186-0137 Piston Ring Gauge on Steel Crown,

Two-Piece Pistons used in 3126 and 3126B

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Engines"

Illustration 211

Note: For information on reusability of the connecting

1. Position piston cooling jet (2) in the cylinder

rods, refer to the following list.

block. Ensure that piston cooling jet (2) is seated

properly. Hold piston cooling jet (2) and install

Guideline For Reusable Parts And Salvage

bolt (1) in each cylinder. Tighten the bolt to a

Operations, SEBF8063, "Visual Inspection of

torque of 28 7 Nm (21 5 lb ft).

Connecting Rods"

End By:

Guideline For Reusable Parts And Salvage

Operations, SEBF8064, "Salvage of Non-Serrated

a. Install the engine oil pump. Refer to Disassembly

Connecting Rods"

and Assembly, "Engine Oil Pump - Install".

Note: For information on reusability of the piston

pins, refer to the following list.

Guideline For Reusable Parts And Salvage

Operations, SEBF8051, "Piston Pins and Retaining

Rings"