ALTERNATOR GP 4N7079 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures. This maintenance is to be performed at the interval specified in the Maintenance Schedule. Before proceeding with this maintenance, perform all previous maintenance interval requirements.Scheduled Oil Sampling (S O S)
Obtain Sample
To compliment a good preventive maintenance program, Caterpillar recommends using S O S at regular scheduled intervals to monitor the condition of your engine and engine oil to help determine the maintenance requirements of your engine.Normal test results from the oil samples will be used to develop a "baseline" which will be used as a basis for determining the oil change interval for your engine, giving you the ultimate time between oil changes without the risk of engine damage.Each oil sample should be taken when the oil is warm and well mixed to ensure that the sample is representative of the oil in the crankcase. There are several methods used to obtain S O S samples from Caterpillar diesel engines.* Use a sampling gun inserted into the sump.* Use a sampling valve installed for samples.* Use the drain stream method when changing oil.The sample valve should be flushed with oil coming out of the crankcase to rinse the dirt and debris from the valve.Caterpillar recommends the first two methods. However, if these methods are not possible, then use a drain stream method when changing the oil.If the drain stream method is used to obtain the oil sample, take the sample after some oil has drained and before the final drain oil stream. The oil at the beginning or end of the drain stream is not mixed well enough to be representative of circulating oil in the compartment and may carry debris that can give false S O s analysis results.Refer to How to Take a Good Oil Sample, PEHP6001 for a step-by-step explanation if using this method of sampling oil. Contact your Caterpillar dealer for information and assistance in establishing the S O S program for your engine and application.If the engine crankcase oil has reached its condemning limits as established by the oil analysis program before the established oil drain interval, refer to the topic, Engine Oil and Filters in this publication to replace the crankcase and/or auxiliary system oil.Oil Drain Intervals
It is essential that an S O S analysis be performed on a regular basis to analyze oil condition before modifying oil change intervals can be considered. Due to manufacturing tolerances, engine application and maintenance variations, all engines do not consume fuel and oil at the same rate. Some history of fuel and oil consumed for each engine (or group of engines) in a similar application must be established. For a group of engines, determine the average fuel consumption and add oil rate.For more information on establishing oil change intervals for specific engines and applications, see your Caterpillar dealer.Engine Oil and Filters
Oil and Filter Change Interval
Use the chart below to establish