Volvo Engine Piping and Lubrication System

Volvo Engine Piping and Lubrication System

Piping

Fuel Line Installation

Fuel lines that are connected to the engine may not be of metal or have metal reinforcements. Metal can cause fuel leakages as static electricity may creep through the it and cause holes in the fuel line. The fuel lines must be run so that fuel is not heated by Volvo diesel engine heat radiation. Refer to the technical data for the engine concerned for maximum fuel temperatures. The lines must be run as straight as possible without sharp bends. Make sure the lines are protected from mechanical wear and that they are securely fastened to avoid vibration damage. It is important that there are no leaks on either the suction or return line installations. Use approved materials in the fuel lines that tolerate biodiesel (FAME) such as:

Rubber

- Fluoro rubber FPM

Plastic

- Polyamide 6, PA6

- Polyamide 11, PA11

- Polyoxymethylene, POM

- Polyethylene MDPE or HDPE

Other approved materials are Teflon, Nylon and Viton (FPM). We recommend the use of flexible fuel hoses between the engine and fuel pipes. These must always be used if the engine is installed on flexible engine mounts. The fuel lines must have a sufficient inner diameter in relation to the pipe length so as not to exceed maximum permissible pressure drop. Refer to the technical date for the engine concerned in the Sales Support Tool, Partner Network. The fuel return line must be run to the upper part of the fuel tank and may not be connected to the suction line. The return line must always discharge below tank minimum fuel level.

D9, D11, D13 and D16 engines are delivered with hose connections in the following standard dimensions:

- Suction hose from tank; 3/8'' or 9.5 mm

- Return hose to tank; 1/4'' or 6.35 mm

Nipples for male connections with the following imperial threads are supplied as options:

- Supply: NPSF 3/8''

- Return: NPSF 1/4''

Volvo Penta can provide information regarding approved fuel hoses available for connection between the engine and fuel pipes or between the engine and tank.

Lubrication System

General

Engine oil is a common name for lubricating oils intended for use in internal combustion engines. No intrusions or changes may be made to the engine lubricating oil system other than with Volvo Penta approved accessories. Engine oil comprises base oils and various additives. It must meet the following requirements:

Good lubrication qualities

The main function of engine oil is to reduce friction and wear by creating a durable, protective film between the moving parts of an engine. High temperatures in cylinders and bearings place especially high demands on the oil film.

Good resistance to oxidation

This is necessary for reliable function, as oxidation easily occurs at high temperatures and causes damage e.g. through resin layers on vital engine parts.

Good detergent qualities

Harmful coatings are avoided, as soot and other combustion deposits are held in suspension by a dispersing agent added to the oil. Detergents also help to keep engine parts clean.

Corrosion protection

Engine oil must protect cylinder liner surfaces, bearings and other components against corrosion that would otherwise easily occur because of the moisture and acids formed during fuel combustion.

Anti-foaming characteristics

Oil that splashes around in the crank case forms a foam of air bubbles that can prevent lubrication if they are allowed to reach lubrication points. Anti-foaming agents make sure that the bubbles burst when they reach the surface in the oil bath.

Low temperature characteristics

The oil must have characteristics suitable for low temperatures in order to prevent cold start wear and to ensure that the engine starts without problem at low temperatures.

Heat conductivity

The oil must be able to carry heat away from hot engine components.

Sealing characteristics

An engine requires high compression to provide maximum power. One of the functions of engine oil is to form a sealing film between the pistons and the cylinder walls.

Suitability for all operational conditions

Engine oil requirements vary depending on the type of engine and its operational conditions.