COVER AS 2658496 - Caterpillar

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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" for the correct procedure.
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If necessary, install Tooling (C) into Hole (W) 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" for the correct procedure. Note: Do not use excessive force to install Tooling (C). Do not use Tooling (C) to hold the crankshaft during repairs.
Ensure that all of the components of the front gear group are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
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Install camshaft gear (7). Loosely install bolt (11) and washer (10) for the camshaft gear. Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install" for the correct procedure.
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Install Tooling (B) through Hole (X) in camshaft gear (7) into the front housing.
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Alignment of timing marks
Install idler gear (8). 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 the correct procedure.
Install fuel pump gear (9). Refer to Disassembly and Assembly, "Fuel Pump Gear - Remove and Install" for the correct procedure.
Ensure that the timing marks on gear (7), gear (8), and gear (9) are in alignment. Refer to Illustration 9.
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Remove Tooling (B) and Tooling (C).
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When a 8.8 Graded bolt (11) is installed. Tighten the bolt to a torque of 95 N m (70 lb ft). When a 10.9 Graded bolt (11) is installed. Tighten the bolt to a torque of 120 N m (89 lb ft).
Check the end play of the camshaft gear. Refer to Specifications, "Camshaft" for more information.
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Use Tooling (E) in order to measure the backlash for gear (7), gear (8), and gear (9). Refer to Specifications, "Gear Group (Front)" for more information.
Lubricate each gear with clean lubricating engine oil.
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Use Tooling (F) in order to check the valve lash. Refer to System Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust". If necessary, use Tooling (F) and Tooling (D) to adjust the valve lash. Refer to System Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure.
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Install a new O-ring seal (1) to plug (2). Install the plug into Hole (W) in the cylinder block. Tighten plug (2) to a torque of 21 N m (186 lb in). End By:
Install the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install" for the correct procedure.
Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure.