TUBE AS 2414707 - Caterpillar

Test Preparation
Park the machine on a smooth, level surface.
Place the transmission in the NEUTRAL position.
Engage the parking brake.
Stop the engine.
Place blocks in front of the wheels and behind the wheels.
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Move the steering frame lock in the LOCKED position.
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Lift and hold knob (1) for 5 seconds to release pressure oil in the hydraulic accumulator.
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Slowly remove hydraulic tank filler cap (2) to relieve any pressure in the hydraulic tank.Reference: For additional information about the release of hydraulic oil pressure, refer to Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.Test Procedure
Illustration 4 g06279994Note: Only perform a bottle sample when the system pressures are below 3450 kPa (500 psi). Prepare all equipment used to sample oil and protect the equipment from contamination.
Operate the machine for a few minutes before obtaining the oil sample. Operate the hydraulic controls to mix the hydraulic oil thoroughly for a more accurate sample.
The S.O.S oil sample port may be located on the brake cooler base. Use the sampling valve to obtain a sample of hydraulic oil.If the hydraulic system is not equipped with a sample valve, obtaining an oil sample will require a vacuum pump or an equivalent.Reference: Refer to Special Publication, PEHP6001, "How To Take A Good Oil Sample" for more information about obtaining an oil sample.
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Sample bottle package
Open the 169-8373 Sample Bottle package. Remove the sampling probe tube from the bag.
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Probe holder and probe
Insert the open sampling probe tube into and through the 162-8873 Sample Bottle Probe Holder counter bored end. Pull the probe tube all the way through the holder until the sampling needle seats in the holder.
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Remove the sampling bottle from the package. Install the cap with two holes onto the bottle. Install the probe tube into one of the holes in the cap.
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Return the assembled bottle and return the probe back into the package to prevent contamination.
Exercise the machine until the system oil to be sampled is up to normal operating temperature or at a minimum of 50 °C (120 °F).
Park the machine on level ground. Lower all the attachments. Engage the parking brake.
Set the engine at low idle. Make sure that all systems are in safe positions. Refer to the Operation and Maintenance Manual.
Remove the dust cover from the S O S valve.
Clean the S O S valve with a clean 162-5791 Lint Free Shop Towel.
Purge the S O S valve by pressing the 8T-9208 Purge Probe onto the S O S valve. Purge a minimum of one sample bottle of oil or more. More than one sample may be required to ensure all the dead volume of the fluid is purged and the sampling nipple is internally cleaned.
Properly dispose of the purged oil.
Remove the prepared sample bottle from the package.
Rinse the sample bottle and rinse the probe tube with the system oil. Rinse the bottle by filling the bottle half full with the system oil.
Shake the sample bottle vigorously for several seconds.
Then empty the