TUBE A 6B4974 - Caterpillar

Removal Procedure
Do not disconnect the air lines until the air pressure in the system is at zero. If hose is disconnected under pressure it can cause personal injury.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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.
Ensure that the No. 1 cylinder is at the top center compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Remove the air pressure from the air tank.
Drain the coolant from the cooling system into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
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Disconnect tube assembly (1), tube assembly (2), tube assembly (3), and tube assembly (4).
Remove clamp assembly (5).
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Attach a suitable lifting device onto air compressor (6). The weight of air compressor (6) is approximately 32 kg (70 lb).
Illustration 3 g01356872
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Remove bolts (9) and cover (10). Ensure that the timing mark on the crankshaft of the compressor is positioned between the timing marks on the housing for the compressor. Reinstall cover (10) and bolts (9). Remove bolts (7). Remove bracket (8).
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Remove bolts (11). Remove the air compressor and the O-ring seal from the engine. Installation Procedure
Ensure that the No. 1 cylinder is at the top center compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Illustration 6 g01356660Note: Check the O-ring seal for wear or for damage. If necessary, replace the O-ring seal.
Attach a suitable lifting device onto air compressor (6). The weight of air compressor (6) is approximately 32 kg (70 lb). Position the O-ring seal and air compressor (6) onto the engine.
Illustration 7 g01356874
Install bolts (11).
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Remove bolts (9) and cover (10). Ensure that the timing mark on the crankshaft of the compressor is positioned between the timing marks on the housing for the compressor. Install cover (10) and bolts (9). Install bracket (8). Install bolts (7).
Illustration 10 g01356642Note: Removal of the timing pin is necessary prior to connecting tube assembly (4).
Connect tube assembly (4), tube assembly (3), tube assembly (2), and tube assembly (1).
Install clamp assembly (5).
Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change.".