To compliment a good preventive maintenance program, Caterpillar recommends using S»OS at regular scheduled intervals to monitor the condition and maintenance requirements
of your engine.
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 two methods recommended to obtain S»OS samples from the engine crankcase.
1. Use the sampling valve installed on the engine for samples 2. Use a sampling gun inserted into the sump.
Caterpillar recommends using one of these methods. If either of these methods are not possible, then use a drain stream method when changing oil.
NOTE: When using the drain stream to obtain the oil sample, do not sample from the first or final drain stream. The oil at the beginning or end of the drain stream is not mixed well
enough to be representative of the oil in the crankcase.
SOS INTERVAL CHART Compartment
Interval Engine Crankcase
Every 250 Hours or at Oil Change
1. Engine Oil and Filter
NOTICE The vehicle must be parked on a level surface to perform this maintenance procedure.
Change Oil Refer to the Lubricant Specifications section of this manual for the recommended oil to use
for this engine. As the oil cools, suspended waste particles will settle on the bottom of the crankcase or oil
pan and will not be removed with the draining oil. Drain the crankcase with the oil warm and the engine stopped to allow for the draining of waste particles that are suspended in
Failure to follow this recommended procedure would result in these waste particles being recirculated through your engine lubrication system with the new oil.
1. After the engine has been run at normal operating
water temperature, STOP the engine. Remove the crankcase drain plug and allow the oil to drain.
An oil sample for S«0«S Scheduled Oil Sampling analysis should have been obtained from the S«0«S valve or by a sample from the crankcase drain at this time.
2. Install the crankcase drain plug and tighten it to 50
±10lbft 70±14N -m .
Use a 2P8250 Filter Wrench to remove the oil filter and optional bypass filter if equipped.