21739021 Volvo.Penta Pipe

1. Release pressure in the air system by opening the two valves on the bottom of the air tank. The air tank is located behind the rear bumper.
At operating temperature, the engine coolant is hot and under pressure. Steam can cause personal injury. Drain the coolant only after the engine has been stopped and the fill cap is cool enough to touch with your bare hand. Remove the fill cap from the radiator slowly to relieve pressure. Cooling system conditioner contains alkali. Avoid contact with the skin and eyes to avoid personal injury.
2. Drain the coolant from the engine into a suitable container for storage or disposal. See the Operation & maintenance manual for the correct draining procedure. Some of the engine compartment components have been removed for better photo illustration. 3. Disconnect tube assemblies (2) and (8) from the air compressor.4. Disconnect tube assemblies (3) and (6) from the air compressor.5. Disconnect two hose assemblies (1) and (5) from the governor.6. Disconnect hose assembly (7) from the air compressor.7. Remove the clip and hose assembly (10) at the air compressor.8. Remove bolt and clip (11) from the breather pipe.9. Fasten a lifting strap and a hoist to the air compressor.10. Remove bolt (9) and washer at the rear of the air compressor 11. Remove two bolts (4) and washers that hold the air compressor to the front housing.12. Remove the air compressor and gasket from the front housing. The weight of the air compressor is 26 Kg (57 lb).13. Remove the nut and washer that hold the drive gear to the air compressor. Remove the drive gear. The following steps are for the installation of the air compressor.14. Check the condition of the gasket used between the air compressor and front housing. If the gasket is damaged, use a new part for replacement.15. Put the drive gear in position on the air compressor, and install the washer and nut that hold it. Tighten the nut to a torque of 160 15 N m (120 11 lb ft).16. Put the gasket in position on the air compressor. Fasten a lifting strap and a hoist to the air compressor. Put the compressor in position in the front housing. Install three bolts (4) and (9) and washers that hold the compressor to the front housing.17. Install two bolts (4) and washers that hold the air compressor to the front housing. First, tighten the bolts finger tight; then tighten the bolts to a torque of 55 10 N m (41 7 lb ft).18. Install bolt (9) and washer at the rear of the air compressor. Tighten the bolts to a torque of 55 10 N m (41 7 lb ft).19. Install bolt and clip (11) for the breather pipe.20. Install the clip and hose assembly (10) at the air compressor.21. Install hose assembly (7) to the air compressor.22. Install two hose assemblies (1) and (5) to the governor.23. Install tube assemblies (3) and (6) to the air compressor.24. Install tube assemblies (2) and (8) to the air compressor.25. Fill the cooling system. Refer to the "Operation & Maintenance Manual" for the proper procedure to fill the cooling system.