6638043 Volvo.Penta Piston

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Purge the air from the air tanks. Refer to Disassembly and Assembly, "Air Tanks (Brake) - Purge" for the Machine System.
Personal injury can result from removing hoses or fittings in a pressure system.Failure to relieve pressure can cause personal injury.Do not remove or disconnect hoses or fittings until all pressure in the air system has been relieved.
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: Install caps and plugs on all openings in order to prevent dirt or debris from entering the system. Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will prevent dirt from entering the internal mechanism.
Position a suitable container below the radiator in order to contain the coolant for storage or for disposal. Drain the coolant from the radiator to a level below the air compressor. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
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Label all of the hose assemblies and the tube assemblies for installation purposes. Disconnect hose assemblies (1), (2), and (4) from air compressor (5). Disconnect tube assembly (3) from air compressor (5) .
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Disconnect hose assembly (8) from air compressor (5). Disconnect tube assemblies (6) and (9) from air compressor (5) .
Remove three bolts (7) and the hard washers that hold air compressor (5) to the engine. Use two people in order to remove air compressor (5) and the gasket from the engine. The weight of the air compressor is 24 kg (53 lb).Note: Refer to Air Compressor, REG00914, "Disassembly and Assembly" for the correct procedure to disassemble the air compressor and assemble the air compressor.Installation Procedure
Note: Check all of the O-ring seals and the components for wear or for damage. Replace the components, if necessary. Lubricate all of the O-ring seals lightly with the lubricant that is being sealed. Clean all of the components with a cloth that is free of loose material (lint).
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Install a new gasket on air compressor (5). Use two people in order to position air compressor (5) on the engine, as shown. The weight of the air compressor is 24 kg (53 lb). Install three bolts (7) and the hard washers that hold air compressor (5) to the engine.
Connect tube assemblies (6) and (9) to air compressor (5). Connect hose assembly (8) to air compressor (5) .
Illustration 4 g00712816
Connect tube assembly (3) to air compressor (5). Connect hose assemblies (1), (2), and (4) to air compressor (5) .
Fill the radiator with coolant to the correct level. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".