CLAMP 3979056 - Caterpillar

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Install camshaft gear (6). Loosely install bolt (28) and washer (27) for the camshaft gear. Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install" for the correct procedure.
Install Tooling (B) through Hole (X) in camshaft gear (6) into the front housing.
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Ensure that the timing marks on gear (6), gear (16), gear (17) and gear (18) are in alignment.
Remove Tooling (B), Tooling (C), and Tooling (D).
When a 8.8 Graded bolt (28) is installed. Tighten the bolt to a torque of 95 N m (70 lb ft). When a 10.9 Graded bolt (28) is installed. Tighten the bolt to a torque of 120 N m (89 lb ft).
Use Tooling (E) in order to check the end play of the camshaft gear. Refer to Specifications, "Camshaft" for more information.
Use Tooling (E) in order to check the end play of the idler gears. Refer to Specifications, "Gear Group (Front)" and refer to Disassembly and Assembly, "Idler Gear - Remove and Install" for more information.
Use Tooling (E) in order to measure the backlash for gear (6), gear (16), gear (17) and gear (18). Refer to Specifications, "Gear Group (Front)" for more information.
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If necessary, follow Step 20.a through Step 20.c in order to assemble gear assembly (11).
Apply a small continuous bead of Tooling (F) to inner Surface (Z) of bearing (14). Place the inner race of bearing (14) onto a suitable support. Press the shaft of gear (15) into bearing (14) until the shoulder of the gear is against the bearing. Remove any excess bearing mount compound.
Install circlip (13) to gear (15).
Lightly lubricate bearing (14) and gear (15) with clean engine oil.
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Install gear assembly (11) to front housing (12). Ensure that the shaft of gear assembly (11) is correctly aligned with the bearing in front housing (12).
Install circlip (10) to front housing (12). Note: Ensure that the circlip is correctly located in the front housing.
Ensure that there is tactile backlash between the idler gear and the accessory drive gear.
If the right-hand side of the engine is equipped, with a hydraulic pump install the hydraulic pump. Refer to the OEM for the correct procedure.
Lightly lubricate a new O-ring seal (9) with Tooling (G). Install new O-ring seal (9) to plate (8). Install plate (8) to front housing (12).
Install bolts (7) to plate (8). Tighten the bolts to a torque of 16 N m (142 lb in).
Lubricate each gear with clean engine oil.
Failure to ensure that the crankshaft is positioned at 60 degrees after top dead center 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 60 degrees after top dead center.
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Ensure that guides (5) for the pushrods are correctly positioned on threaded inserts (4). Tighten threaded inserts (4) on all rocker arms (3). Tighten the threaded inserts to a torque of 30 N m