C6.6 Engines for Caterpillar Built Machines Gear Group (Front) - Remove and Install Caterpillar


Gear Group (Front) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
(1)     9U-6198     Crankshaft Turning Tool     1    
(2)     9U-7336     Housing     1    
5P-7305 Engine Turning Tool     1    
B     230-6284     Timing Pin (Camshaft)     1    
C     136-4632     Timing Pin (Crankshaft)     1    
268-1966 Adapter     1    
( 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 front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install".
  2. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Dispose of all fluids according to local regulations and mandates.


Note: Either Tooling (A) can be used. Use the Tooling that is most suitable. Care must be taken in order to ensure that the fuel injection pump timing is not lost during the removal of the front gear group. Carefully follow the procedure in order to remove the gear group.

  1. Use Tooling (A) in order to 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".



    Illustration 1g01335379

    Typical example

  1. Install Tooling (B) through hole (X) in camshaft gear (1) into the front housing. Use Tooling (B) in order to lock the camshaft in the correct position. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston".



    Illustration 2g01335380

  1. Remove plug (4) from the cylinder block. Install Tooling (C) into hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston".

    Note: Do not use excessive force to install Tooling (C) . Do not use Tooling (C) to hold the crankshaft during repairs.




    Illustration 3g01337898

  1. Loosen nuts (6) on all rocker arms (7) . Unscrew adjusters (5) on all rocker arms (7) until all valves are fully closed.

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

  1. Apply sufficient pressure to fuel injection pump gear (3) in a counterclockwise direction in order to remove the backlash. Lock the fuel injection pump in this position. Refer to Disassembly and Assembly, "Fuel Pump Gear - Remove" for the correct procedure.



    Illustration 4g01335384

    Typical example

  1. Mark gears (1) , (2) and (3) in order to show alignment. Refer to Illustration 4.

    Note: Identification will ensure that the gears can be installed in the original alignment.

  1. Remove fuel pump gear (3) . Refer to Disassembly and Assembly, "Fuel Pump Gear - Remove and Install" for the correct procedure.

  1. Remove camshaft gear (1) . Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install".

  1. Remove idler gear (2) . Refer to Disassembly and Assembly, "Idler Gear - Remove and Install".

Installation Procedure

Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
B     230-6284     Timing Pin (Camshaft)     1    
C     136-4632     Timing Pin (Crankshaft)     1    
268-1966 Adapter     1    


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


Note: The fuel injection pump must remain locked until the procedure instructs you to unlock the fuel injection pump.

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



    Illustration 5g01335380

  1. If necessary, install Tooling (C) into hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston".

    Note: Do not use excessive force to install Tooling (C) . Do not use Tooling (C) to hold the crankshaft during repairs.

  1. Ensure that all of the components of the front gear group are clean and free from wear of damage. If necessary, replace any components that are worn or damaged.



    Illustration 6g01337904

  1. Install camshaft gear (1) . Loosely install bolt (6) and washer (5) for the camshaft gear. Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install" for more information.



    Illustration 7g01335379

    Typical example

  1. Install Tooling (B) through hole (X) in camshaft gear (1) into the front housing.



    Illustration 8g01337905

    Typical example




    Illustration 9g01335384

    Alignment of timing marks

  1. Install idler gear (2) . Ensure that the timing marks on gear (1) and gear (2) are in alignment and that the mesh of the gears is correct. Refer to Disassembly and Assembly, "Idler Gear - Remove and Install". Check the end play of the idler gear. Refer to Specifications, "Gear Group (Front)" and refer to Disassembly and Assembly, "Idler Gear - Remove and Install" for further information.

  1. Tighten bolt (6) for the camshaft gear to a torque of 95 N·m (70 lb ft). Check the end play of the camshaft gear. Refer to Specifications, "Camshaft" for more information.

  1. Ensure that the fuel injection pump is locked in the correct position. Refer to Disassembly and Assembly, "Fuel Injection Pump - Install".

  1. Install fuel injection pump gear (3) . Ensure that the timing marks on gear (2) and gear (3) are in alignment. See Illustration 9. Ensure that the mesh of the gears is correct. Refer to Disassembly and Assembly, "Fuel Injection Pump Gear - Install" for more information.

  1. Remove Tooling (B) and (C) . Install plug (4) into hole (Y) in the cylinder block. Refer to Illustration 5.



    Illustration 10g01335426

    Checking backlash

  1. Ensure that the backlash for gears (1) , (2) and (3) is within specified values. Refer to Specifications, "Gear Group (Front)" for further information.

  1. Lubricate each gear with clean engine oil.

  1. Adjust the engine valve lash. Refer to System Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".

End By:

  1. Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
  2. Install the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install".

Information System:

C6.6 Engines for Caterpillar Built Machines Front Cover - Remove and Install
770 and 772 Off-Highway Truck/Tractors Evaporator Coil - Remove and Install
C6.6 Engines for Caterpillar Built Machines Crankshaft Front Seal - Remove and Install
C6.6 Engines for Caterpillar Built Machines Vibration Damper and Pulley - Remove - Pulleys without Split Lock Rings
C6.6 Engines for Caterpillar Built Machines Vibration Damper and Pulley - Install - Pulley with Split Lock Rings
C6.6 Engines for Caterpillar Built Machines Vibration Damper and Pulley - Install - Pulleys without Split Lock Rings
C6.6 Engines for Caterpillar Built Machines Vibration Damper and Pulley - Remove - Pulley with Split Lock Rings
C6.6 Engines for Caterpillar Built Machines Flywheel Housing - Remove and Install - Wet Back End Housing
C6.6 Engines for Caterpillar Built Machines Flywheel Housing - Remove and Install - Standard Housing
C6.6 Engines for Caterpillar Built Machines Crankshaft Rear Seal - Install
C6.6 Engines for Caterpillar Built Machines Crankshaft Rear Seal - Remove
C6.6 Engines for Caterpillar Built Machines Flywheel - Install
C6.6 Engines for Caterpillar Built Machines Idler Gear - Remove
C6.6 Engines for Caterpillar Built Machines Idler Gear - Install
C6.6 Engines for Caterpillar Built Machines Housing (Front) - Remove
C6.6 Engines for Caterpillar Built Machines Housing (Front) - Install
C6.6 Engines for Caterpillar Built Machines Accessory Drive - Remove and Install
C6.6 Engines for Caterpillar Built Machines Crankcase Breather - Remove - Unfiltered Breather
C6.6 Engines for Caterpillar Built Machines Crankcase Breather - Remove - Filtered Breather
C6.6 Engines for Caterpillar Built Machines Crankcase Breather - Install - Unfiltered Breather
C6.6 Engines for Caterpillar Built Machines Crankcase Breather - Install - Filtered Breather
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover - Remove and Install - Composite Valve Mechanism Cover
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover Base - Remove and Install - Composite Valve Mechanism Cover Base
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover - Remove and Install