C7.1 Industrial Engine Idler Gear - Remove Caterpillar


Idler Gear - Remove
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1.1. Removal Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
364-9107  Fuel Injection Pump Timing Pin  
230-6284  Timing Pin (Camshaft) 
136-4632  Timing Pin (Crankshaft) 
268-1966 Adapter 
298-5564  T40 Torx Socket 

Start By:

  1. Remove the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install" for the correct procedure.

  2. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure.

Note: Care must be taken in order to ensure that the fuel injection pump timing is not lost during the removal of the idler gear. Carefully follow the procedure in order to remove the fuel pump gear.


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.




    Illustration 1g01994555


    Illustration 2g01994553

  1. Rotate the crankshaft so that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston" for the correct procedure.

  2. Remove plug (2) from the cylinder block and remove O-ring seal (1) from the plug.

  3. Ensure that Tooling (C) is installed in Hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position.

  4. Ensure that Tooling (B) is installed into Hole (X) in camshaft gear (3). Use Tooling (B) in order to lock the camshaft in the correct position.

    Note: Ensure that the gears are marked in order to show alignment. Refer to Illustration 2.

  5. Use Tooling (A) in order to lock the fuel injection pump gear in the correct position. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove" for the correct procedure.


    Illustration 3g01994556

  6. Use Tooling (D) in order to loosen threaded inserts (5) on all rocker arms (6). Unscrew threaded inserts (5) on all rocker arms (6) until all valves are fully closed.

    Note: Failure to ensure that ALL threaded inserts are fully unscrewed can result in contact between the valves and pistons.



    Illustration 4g01994576


    Illustration 5g01994557

  7. Mark plate (8) in order to show orientation.

    Note: Identification will ensure that the plate can be installed in the original orientation.

  8. Remove bolts (7).

  9. Remove plate (8).

  10. Remove the assembly of idler gear (4).

  11. Remove hub (9) from the recess in the front housing.

Information System:

C7.1 Industrial Engine Idler Gear - Install
C7.1 Industrial Engine Housing (Front) - Remove
C7.1 Industrial Engine Housing (Front) - Remove - Heavy Duty Housing (Front)
C7.1 Industrial Engine Housing (Front) - Install
C7.1 Industrial Engine Housing (Front) - Install - Heavy Duty Housing (Front)
C7.1 Industrial Engine Glow Plugs - Remove and Install
C7.1 Industrial Engine Gear Group (Front) - Remove and Install
C7.1 Industrial Engine Gear Group (Front) - Remove and Install - Heavy Duty Gear Group (Front)
C7.1 Industrial Engine Fuel Pump (ARD) - Remove and Install
C7.1 Industrial Engine Fuel Manifold (Rail) - Remove and Install
C7.1 Industrial Engine Fuel Injection Pump Gear - Remove
C7.1 Industrial Engine Fuel Injection Pump Gear - Install
C7.1 Industrial Engine Idler Pulley - Remove and Install - Flat Idler Pulley
C7.1 Industrial Engine Idler Pulley - Remove and Install - Grooved Idler Pulley
C7.1 Engines for Caterpillar Built Machines Ignition Coil (ARD) - Remove and Install - Clean Emissions Module
C7.1 Industrial Engine Inlet Air Control - Install - NRS Inlet Air Mixer
C7.1 Industrial Engine Inlet Air Control - Remove - NRS Inlet Air Mixer
C7.1 Industrial Engine Inlet and Exhaust Valve Springs - Remove and Install
C7.1 Industrial Engine Inlet and Exhaust Valves - Remove and Install
C7.1 Industrial Engine Inlet Manifold Temperature Sensor - Remove and Install
C7.1 Industrial Engine Lifter Group - Remove and Install - Hydraulic Lifter Group
C7.1 Industrial Engine Piston Cooling Jets - Remove and Install
C7.1 Industrial Engine Pistons and Connecting Rods - Assemble
C7.1 Industrial Engine Pistons and Connecting Rods - Disassemble