Tecnico Profesional

Marine Analyst Service Handbook

Caterpillar Service Training

January 2004 - 6th Edition

January 2004 LEBV4830-05

This book contains a list of formulas and terms for use by a qualified Caterpillar Marine Analyst. Many of the formulas are “Rules of Thumb” but they do provide guidance in their respective areas. These formulas are generally accepted in the marine field. This book isintended as an aid to the Marine Analyst and NOT a replacement for professional ship design personnel.

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Table of Contents
Engine Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Boat Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 2-1 Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Lubrication Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Fuel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18 Cooling Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Driveline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Mounting and Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-90 Marine Engines Sea Trial Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Control Systems . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Conversion Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Index . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 10-87

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Engine Performance
Application Guidelines
Knowledge of the engine’s operating requirements is essential to establish a proper match of engine rating to boat operating requirements. To help determine the acceptability of a rating for a particular boat’s application, the following parameters should be considered: 1. Time at fullthrottle 2. Annual operating hours 3. Propeller match

Time at Full Throttle
Time at full throttle is the amount of time the engine is operated at rated rpm without load cycling during a normal duty cycle. This is normally specified in terms of percent of total cycle time or in minutes per hour.

Annual Operating Hours
The annual operation hours are based on the accumulated service meter units*during a 12-month period.

Propeller Match
The propeller must be sized to allow the engine to operate slightly above rated rpm under the boat’s most severe load conditions: full fuel and water tanks, stores aboard for extended voyaging, and adverse sea conditions.
*Clock hours are the same as Service Meter Units on all Caterpillar Engines using electric service meters. Some Caterpillar Engines(D399, D398, D379 and earlier engines) used service meters which “counted” engine revolutions. One service meter unit on those engines, corresponds to a clock hour only when the engine is operating at rated speed (rpm). The ratio between clock hours and service meter units is proportional to engine speed.

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Ratings
Ratings are statements of the engines’ power and speed capability underspecified load conditions. The Caterpillar rating system simply matches engines to particular applications. It consists of the following standard ratings.

Continuous A Rating
For heavy-duty service in ocean-going displacement hulls such as freighters, tugboats, bottom-drag trawlers, and deep river towboats when the engine is operated at rated load and speed up to 100% of the time without...