C7.1 Industrial Engine Pistons and Connecting Rods - Remove Caterpillar


Pistons and Connecting Rods - Remove
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1.1. Removal Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
A(1)  9U-6198  Crankshaft Turning Tool 
A(2)  9U-7336  Housing 
5P-7305 Engine Turning Tool 
8S-2269  Ridge Reamer 
227-4390  E12 Torx Socket 
(1) The Crankshaft Turning Tool is used on the front pulley.
(2) This Tool is used in the aperture for the electric starting motor.

Start By:

  1. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove" for the correct procedure.

  2. Remove the piston cooling jets. Refer to Disassembly and Assembly, "Piston Cooling Jets - Remove and Install" for the correct procedure.

Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


  1. Use Tooling (A) to rotate the crankshaft until the crank pin is at the bottom center position.

  2. Use Tooling (B) to remove the carbon ridge from the top inside surface of the cylinder bore.


    Illustration 1g01341291

  3. The connecting rod and the connecting rod cap should have an etched number in Position (X) on the side. The number on the connecting rod and the connecting rod cap must match. Ensure that connecting rod (1) and connecting rod cap (2) are marked for the correct location. If necessary, make a temporary mark on the connecting rod and the connecting rod cap in order to identify the cylinder number.

    Note: Do not stamp the connecting rod assembly. Stamping or punching the connecting rod assembly could cause the connecting rod to fracture.

  4. Use Tooling (C) to remove bolts (3). Remove connecting rod cap (2) from connecting rod (1).


    Illustration 2g02013134

  5. Carefully push piston (4) and the connecting rod out of the cylinder bore. Lift piston (4) out of the top of the cylinder block.

    Note: Do not push on the fracture split surfaces of the connecting rod as damage may result.

  6. Repeat Step 1 through Step 5 for the remaining pistons and connecting rods.

    Note: Fracture split connecting rods should not be left without the connecting rod caps installed. Temporarily install connecting rod cap (2) and bolts (3) to connecting rod (1) when the assembly is out of the engine. Ensure that the etched number on connecting rod cap matches the etched number on connecting rod . Ensure the correct orientation of the connecting rod cap . The locating tab for the upper bearing shell and the lower bearing shell should be on the same side. Tighten bolts (3) to a torque of 20 N·m (177 lb in).

Information System:

C7.1 Industrial Engine Pistons and Connecting Rods - Install
C7.1 Industrial Engine Pistons and Connecting Rods - Disassemble
C7.1 Industrial Engine Pistons and Connecting Rods - Assemble
C7.1 Industrial Engine Piston Cooling Jets - Remove and Install
C7.1 Industrial Engine Lifter Group - Remove and Install - Hydraulic Lifter Group
C7.1 Industrial Engine Inlet Manifold Temperature Sensor - Remove and Install
C7.1 Industrial Engine Inlet and Exhaust Valves - Remove and Install
C7.1 Industrial Engine Inlet and Exhaust Valve Springs - Remove and Install
C7.1 Industrial Engine Inlet Air Control - Remove - NRS Inlet Air Mixer
C7.1 Industrial Engine Inlet Air Control - Install - NRS Inlet Air Mixer
C7.1 Engines for Caterpillar Built Machines Ignition Coil (ARD) - Remove and Install - Clean Emissions Module
C7.1 Industrial Engine Idler Pulley - Remove and Install - Grooved Idler Pulley
C7.1 Industrial Engine Pressure Sensor (Cooled Exhaust Gas) - Remove and Install - Differential Pressure Sensor
C7.1 Industrial Engine Rear Power Take-Off (RPTO) - Install
C7.1 Industrial Engine Rear Power Take-Off (RPTO) - Remove
C7.1 Industrial Engine Refrigerant Compressor - Remove and Install
C7.1 Industrial Engine Relay (ARD Nozzle Heater) - Remove and Install - Clean Emissions Module
C7.1 Industrial Engine Rocker Shaft - Assemble
C7.1 Industrial Engine Rocker Shaft - Disassemble
C7.1 Industrial Engine Rocker Shaft and Pushrod - Install
C7.1 Industrial Engine Rocker Shaft and Pushrod - Remove
C7.1 Industrial Engine Soot Antenna - Remove and Install
C7.1 Industrial Engine Temperature Sensor (DPF) - Remove and Install - Temperature Sensor (DPF) and Flame Detection Sensor
C7.1 Industrial Engine Temperature Sensor (Cooled Exhaust Gas) - Remove and Install