GUARD AS 6I8139 - Caterpillar

Start By:
Remove the electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove".
Remove the valve mechanism cover base. Refer to Disassembly and Assembly, "Valve Mechanism Cover Base - Remove and Install".
Remove the fuel transfer pump. Refer to Disassembly and Assembly, "Fuel Transfer Pump - Remove".
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.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Do not turn the crankshaft or the camshaft while the camshaft gear is removed. If the rear gear group is not correctly timed during installation, interference can occur between the pistons and the valves, resulting in damage to the engine.
Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".
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Remove cover (1).
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Remove bolts (2) and gear (3).
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Remove bolts (4), thrust plate (5), and adapter assembly (6).
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Use bolt (4) in order to remove sealing plate (7). Remove the O-ring seals.
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Remove elbow (8). Disconnect hose assembly (9).
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Remove elbow (11) and cover (10).
Disconnect harness assembly (12) and harness assembly (13).
Remove bracket (14).
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Remove bolts (15) and damper (16).
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Remove bolts (17). Remove sealing plate (18) and adapter assembly (19).
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Disconnect clip assembly (22) from the cylinder head. Remove tube assemblies (21).
Remove bracket (20).
Disconnect tube assembly (23) and remove tube assembly (24).
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Attach Tooling (A) and a suitable lifting device to cylinder head (25). Attach Tooling (B) to the side of cylinder head (25) that is near the turbocharger. The weight of cylinder head (25) is approximately 365 kg (800 lb).
Remove bolts (26) and bolts (27).
Remove cylinder head (25). Remove the gaskets, O-ring seals, and the spacer plate.