HOUSING- 1006553 - Caterpillar

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shorten component life.
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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. Refer to System Operation, Testing and Adjusting, "Finding Top Center Position for No.1 Piston" for the correct procedure.
Ensure that Tooling (B) is installed into Hole (X) in camshaft gear (3).
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.
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Clean idler gear (4) and inspect the idler gear for wear and damage. Refer to Specifications, "Gear Group (Front)" for more information. If necessary, replace the idler gear.
Clean hub (9) and inspect the hub for wear and damage. Refer to Specifications, "Gear Group (Front)" for more information. If necessary, replace the hub.
Lubricate hub (9) with clean engine oil. Install hub (9) into the recess in the front housing. Ensure that oil Hole (Z) is position as shown in the Illustration 4.
Install idler gear (4) onto hub (9). Ensure that the timing marks are toward the front of the idler gear.
Align the timing mark on idler gear (4) with the timing mark on camshaft gear (3), fuel injection pump gear (10) and crankshaft gear (11). Refer to the Illustration 5. Install the assembly of idler gear (4) to hub (9).
Clean plate (8) and inspect the plate for wear and damage. If necessary, replace the plate.
Lubricate plate (8) with clean engine oil. Align the holes in plate (8) with the holes in hub (9). Install the plate in the original orientation. Note: Ensure that the identification mark TOP is upward.
Install bolts (7). Tighten the bolts to a torque of 44 N m (32 lb ft).
Remove Tooling (A), Tooling (B), and Tooling (C). Note: Ensure that timing marks are aligned, before removing the Tooling (A), Tooling (B) and Tooling (C).
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Position a new O-ring seal (1) onto plug (2). Install the plug to the cylinder block and tighten the plug to a torque of 21 N m (186 lb in).
Use Tooling (E) in order to check the end play for the idler gear. Refer to Specifications, "Gear Group (Front)" for more information.
Use Tooling (E) in order to check the backlash between the idler gear and the camshaft gear. Refer to Specifications, "Gear Group (Front)" for more information.
Use Tooling (E) in order to check the backlash between the idler gear and the crankshaft gear. Refer to Specifications, "Gear Group (Front)" for more information.
Use Tooling (E) in order to check the backlash between the idler gear and the fuel injection pump gear. Refer to Specifications, "Gear Group (Front)" for more information.
Lightly lubricate all of the gears with clean engine oil.
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Rotate the crankshaft in a clockwise direction and position the crankshaft at 60 degrees after top dead center. Refer to System Operation, Testing and Adjusting, "Position the Valve Mechanism Before Maintenance