Sampling lube oil systems

Sampling Methods – Main Points

· Always use a new sample bottle and length of tubing for each sample taken. Never re-use a bottle or sample tubing for reasons of potential cross contamination.  

· Initially ensure that the machine to be sampled is brought to operating temperature prior to sampling (usually about 15 minutes), if the machine is not operating continuously, this will ensure that any contamination present within the oil/system will be suspended evenly throughout the system and be representative of the overall condition. Samples taken from machines that have not been working are not representative as any contamination present may have gravitated down to the bottom of the sump/reservoir.

· If the machinery has to be switched off to extract the sample ensure that the sample is taken within 15 minutes of the shutdown to ensure the oil is representative.  

 

· All samples should always be taken in the same manner and from the same sample point, regardless of who is drawing the sample from the machine.

· If possible sample before the filter to obtain an accurate insight to actual contamination levels within the system.

· Always ensure any oil that has spilled onto the floor or surrounding area is cleaned up and disposed of in environmentally friendly manner.

Sample Drain Valve Method

Ensure the machine has been working for at least 15 minutes just prior to taking sample.

· With a lint-free cloth clean around the sample drain valve area to ensure no external contamination is drawn into the sample.

· Open the sample drain valve and regulate the flow of oil by letting the oil flow for 5 seconds into a waste container, this removes any debris that may have collected in the sample valve.

· After 5-10 seconds of flow draw the oil into the bottle filling it to at least 50% full.  Close the sample valve.

· Replace the bottle cap immediately and shake the bottle to ‘clean’ the bottle with the oil you are sampling.  

· Discard this oil into a safe waste container and then remove the bottle cap and place under the sample drain valve.  

· Open the drain valve again and draw more oil into the bottle. Once the bottle is 90% full remove from the pump and replace the cap IMMEDIATELY

· Complete sample form with sampled machines’ details  

Sample Pump Method  

Ensure the machine has been working for at least 15 minutes just prior to taking sample.

· With a lint-free cloth clean around the dipstick/filler cap area to ensure no external contamination is drawn into the sample.

· Using the bottle and PUMP system – simply push the tubing into the oil via the dip-stick hole or filler cap and draw the oil into the bottle filling it to at least 50% full.  

· Replace the cap immediately and shake the bottle to ‘clean’ the bottle with the oil you are sampling.  

· Discard this oil into a safe waste container and then re-attach the bottle to the vacuum pump.  

· Pull vacuum on the pump to draw more oil into the bottle. Once the bottle is 90% full remove from the pump and replace the cap IMMEDIATELY

· Complete sample form with sampled machines’ details  

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