PRE-LUBER MARINE GAS AND DIESEL ENGINE PRIMING ACCESSORY PUMPS AND BOAT PARTS

Recently completed testing by an independent testing facility with support from a leading bearing manufacturer has confirmed what experts at SAE and McDonnell Douglas Transportation Dept. have been saying for years. Most of the mechanical wear in an engine occurs during engine start-up. Oil pressure's non-existent during the critical high stress, high torque, first seconds of start-up.

Two identical engines were tested; one with a Pre-luber system, the other without, The Pre-luber equipped engine showed less scuffing and up to 53% of the bearing wear was eliminated in the engine equipped with the Pre-luber system.

Pre-luber Reduces Wear
Mechanical Wear - The removal of metal that occurs when engine parts are temporarily devoid of lubrication and metal meets metal.
Studies by SAE and McDonnell Douglas indicate that the majority of this wear occurs at start-up.

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(Fig.1)

Bearing in motion (at left) shows oil separating surface. The parts virtually ride on a thin film of oil. Bearing with engine shut off (right) shows metal to metal contact.

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Running Stop Normal Preluber
Start Start
(Fig. 2)

Polished bearing surface magnified approximately 10,000 times.

In Fig. 2A oil pressure forces the bearing apart, metal to metal contact cannot take place. However, when an engine is shut off the film of oil collapses and metal to metal contact occurs. (Fig. 2B). When you next start the engine, you tear off the peaks of metal, which are then.are carried away in the oil. (Fig. 2C).This is how a part is worn out. The Pre-luber system eliminates the metal to metal wear by automatically oil pressurizing the entire engine before it is started. (Fig. 2D).

Abrasive Wear - Contamination of the oil causes abrasion which results in scratching the bearing surfaces.
The contamination comes from three main sources: combustion by-products, atmospheric dust and mechanical wear debris, (graphically depicted below).

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Engine under normal operating condition.

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Mechanical wear debris is virtually eliminated in engines equipped with a Pre-Luber system.

The best way to prevent abrasive wear is to eliminate the abrasives that cause the wear. Pre-luber eliminates the hard metal oxides produced by mechanical wear, which reduces oil contamination and abrasive wear.