SPRING AS-GAS 3788424 - Caterpillar

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If necessary, install Tooling (D) into Hole (W) in the cylinder block. Use Tooling (D) 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 (D). Do not use Tooling (D) 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 (6). Loosely install bolt (11) and washer (10) for the camshaft gear. Refer to Disassembly and Assembly, "Camshaft Gear" for more information.
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Install Tooling (B) through Hole (X) in camshaft gear (6) into the front housing.
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Alignment of timing marks
Install idler gear (7). Ensure that the timing marks on gear (6), gear (7), gear (8) and gear (9) are in alignment and that the mesh of the gears is correct.
Refer to Disassembly and Assembly, "Idler Gear" for the correct procedure.
Use Tooling (F) in order to check the end play of the idler gear. Refer to Specifications, "Gear Group (Front)" and refer to Disassembly and Assembly, "Idler Gear" for further information.
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Ensure that the fuel injection pump is locked in the correct position. Refer to Disassembly and Assembly, "Fuel Injection Pump" for the correct procedure.
Remove Tooling (B) and Tooling (C) .
When bolt (11) is a 8.8 Grade. Tighten bolt (11) for camshaft gear (6) to a torque of 95 N m (70 lb ft).When bolt (11) is a 10.9 Grade. Tighten bolt (11) to a torque of 120 N m (89 lb ft).
Use Tooling (F) in order to check the end play of the camshaft gear. Refer to Specifications, "Camshaft" for more information.
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Use Tooling (F) in order to measure the backlash for gear (6), gear (7), gear (8) and gear (9). Refer to Specifications, "Gear Group (Front)" for further information.
Lubricate each gear with clean lubricating engine oil.
If necessary, 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" for the correct procedure. If necessary, use Tooling (D) in order to lock the crankshaft so that number one piston is at top dead center on the compression stroke.
Remove Tooling (D) .
Failure to ensure that the crankshaft is positioned at the safe position will result in interference between the pistons and the valves. Interference between the pistons and the valves will result in damage to the engine.
Use Tooling (A) in order to rotate the crankshaft in a clockwise direction and position the crankshaft at the safe position. Refer to System Operation, Testing and Adjusting, "Position the Valve Mechanism Before Maintenance Procedures" for the correct procedure.
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Ensure that the guides (5) for the pushrods are correctly positioned on the threaded inserts (4). Use Tooling (E) in order to