Blue Bird Coachworks 450 LXi, Owner'S Manual

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450 LXi Owner Manual 5-3 Engine Maintenance
Rev. “C”
~ 5-3-27 ~
Pour an additional 4 L (4 qt) of oil into the crankcase. Start the engine and run the engine enough to ensure that the
lubrication system is fi lled. Inspect the engine for oil leaks.
Stop the engine and allow enough time for the oil to drain into the crankcase.
Check the oil level on the oil level gauge. If the oil level is not at the calibrated “FULL” mark, fi ll the crankcase to the
calibrated “FULL” mark. Record the amount of oil that was added. The additional oil and the 40 L (42 qt) of oil that was in
the crankcase is the oil capacity of the lubrication system. Record the oil capacity of the lubrication system for future oil
changes.
7.
8.
9.
5-3.33 Engine Oil Sample - Obtain
In addition to a good preventative maintenance program, Caterpillar recommends using S•O•S oil analysis at regularly
scheduled intervals in order to monitor the condition of the engine and the maintenance requirements of the engine S•O•S
oil analysis provides infrared analysis, which is required for determining nitration and oxidation levels.
5-3.33.1 Obtain the Sample and the Analysis
Before you take the oil sample, complete the Label, PEEP5031 for identifi cation of the sample. In order to help obtain the
most accurate analysis, provide the following information:
Engine model
Service hours on the engine
The number of hours that have accumulated since the last oil change
The amount of oil that has been added since the last oil change
To ensure that the sample is representative of the oil in the crankcase, obtain a warm, well mixed oil sample.
To avoid contamination of the oil samples, the tools and the supplies that are used for obtaining oil samples must be clean.
Caterpillar recommends using the sampling valve in order to obtain oil samples. The quality and the consistency of the
samples are better when the sampling valve is used. The location of the sampling valve allows oil that is fl owing under
pressure to be obtained during normal engine operation.
The 169-8373 Fluid Sampling Bottle is recommended for use with the sampling valve. The fl uid sampling bottle includes the
part that is needed for obtaining oil samples. Instructions are also provided.
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If the engine is not equipped with a sampling valve, use the 1U-5718 Vacuum Pump. The pump is designed to accept
sampling bottles. Disposable tubing must be attached to the pump for insertion into the sump.
NOTICE: Always use a designated pump for oil sampling, and use a separate designated pump for coolant
sampling. Using the same pump for both types of samples may contaminate the samples that are being drawn. This
contaminate may cause a false analysis and an incorrect interpretation that could lead to concerns by both dealers
and customers.
WARNING!!
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components
to contact the skin.
NOTICE: Do not crank the engine for more than 30 seconds. Allow the starting motor to cool for two minutes
before cranking again.