Frecuencias de Muestreo CAT
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40 Maintenance Section Lubricant Specifications i 0092 1956 S·O·S Oil Analysis SMCS Code: 1000;1300;1348;7000;7542 C aterpillar rec om m end s the us e of the S · O · S oi l anal ysis prog r am i n o r d erto m on i t orthe c ond i t i on of your eq ui pm ent .The S · O · S oilanal ysi s p rog r am w i l l co m p lem en t your p reven tive m ai ntenance p r og ram . Obtaining S·O·S Oil Samples B efore you obtai n an S · O · S oilsam ple, op er at e t he m ac hi ne unti l t he oilis w ar m an d t he oilis w ell circu l at ed . Th en ob tai n the S · O · S oilsa m p le. I n or der to ob t ai n a g oo d oi l sam p le,do nottake t he oil sa m ple f rom t he d r ai n strea m . Th e d rain stream m e t ho d can allow a st r ea m of dir t y o il f r om t he b ot t om of the co m p ar t m e nt to contam i na t e t he sam ple. Li kew i se, never dip an oi lsa m p le from an oilc on t ai ne r or p ou r a sam p le f rom a us ed filter. NOTICE Do not use the same vacuum sampling pump for ex- tracting oil samples that is used for extracting coolant samples. A small residue of either type sample may remain in the pump and may cause a false positive analysis for the sample being taken. Always use a designated pump for oil sampling and a designated pump for coolant sampling. Failure to do so may cause a false analysis which could lead to customer and dealer concerns. Th er e are tw o w ays t o obtai n S · O · S oilsam p les. The f oll ow ing m et hod s are li st ed in t he or d er t hat is p r ef er r ed: • U se an in-l i ne sa m p li ng va lve f or p r essu r i ze d oi l syst em s. • U se a sam p li ng g un t ha tis i ns erted into the su m p . U se of t he i n -line sa m p li ng va lve is t he p r ef err ed m ethod . Thi s m ethod p rovid es sam p les thatar e less likel y t o b e co nt am i na t ed . W he ne ver you ob t ai n t he sam p l es, ob t ai n the sam p les from t he sam e p oi nt . Th i s m ak es t he sam ples m or e r ep res en tati ve of t he oil t hat i s i n t he syst em . I n or d er to ob t ain an oilsa m p le f r om t he en gine co m p artm e nt , i t m a y b e ne ce ssar y t o i nc rease t he en g i ne 's sp ee d . N or m al ly, t he oi lsa m p le is t ake n at l ow i d l e.I f t he f l ow rat e i s t oo low , incr ea se eng ine sp ee d to hi g h i d le in ord er to ob t ai n the oilsam p le. I n- line sam p li ng val ves ca nn ot be use d on nonp r essurized oil syst em s su ch as dif f er entials an d final d rives.U se of t he sam p li ng g un is t he p referred m e t ho d f or no np r ess urized oil system s. R eferto t he O p er at ion and M a inten an ce M a nu al, “ M ai nten an ce Interval Sched ule” f or the p r op er i nt erval. The S · O · S oil an al ysi s is c om p osed of four basic t est s: • W ea r m e t al an al ysi s • Inf r ared anal ysi s f or oi l condit i on • Test s f or co nt am i nat ion of t he oi lb y f uel,by w a t er, an d / or b y a nti f r eeze • P arti cle C ou nt f or hyd raul ics, t r ansm issi ons and ot he r ge ar c om p art m en ts C o n su l t yo ur C a t er p i ll ar D ealer for com p l et e i nf orm ation an d as si st an ce ab ou t the S · O · S oil an al ysi s p r og r am . i00 941 697 Sampli ng Interval and Locati on of Sampling Valve SMCS Code: 1000;7000;7542 Take the oilsam p les as cl ose as possible t o the stand ard i n terva l s.In or d er t o r eceive t h e f ull va lue f rom S · O · S oi l an alysis, you m u st es t ab lish a co nsi st en t t rend of data.In order to est ab li sh a p erti ne nt hi st ory of d at a, p erform consist en toil sam plings t ha t are even ly spaced.
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Transcript of Frecuencias de Muestreo CAT
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40Maintenance SectionLubricant Specifications
i00921956
SOS Oil AnalysisSMCS Code: 1000; 1300; 1348; 7000; 7542
Caterpillar recommends the use of the SOS oilanalysis program in order to monitor the condition ofyour equipment. The SOS oil analysis program willcomplement your preventive maintenance program.
Obtaining SOS Oil SamplesBefore you obtain an SOS oil sample, operate themachine until the oil is warm and the oil is wellcirculated. Then obtain the SOS oil sample.
In order to obtain a good oil sample, do not takethe oil sample from the drain stream. The drainstream method can allow a stream of dirty oil fromthe bottom of the compartment to contaminate thesample. Likewise, never dip an oil sample from anoil container or pour a sample from a used filter.
NOTICEDo not use the same vacuum sampling pump for ex-tracting oil samples that is used for extracting coolantsamples.
A small residue of either type sample may remain inthe pump and may cause a false positive analysis forthe sample being taken.
Always use a designated pump for oil sampling and adesignated pump for coolant sampling.
Failure to do so may cause a false analysis whichcould lead to customer and dealer concerns.
There are two ways to obtain SOS oil samples.The following methods are listed in the order thatis preferred:
Use an in-line sampling valve for pressurized oilsystems.
Use a sampling gun that is inserted into the sump.
Use of the in-line sampling valve is the preferredmethod. This method provides samples that areless likely to be contaminated. Whenever you obtainthe samples, obtain the samples from the samepoint. This makes the samples more representativeof the oil that is in the system.
In order to obtain an oil sample from the enginecompartment, it may be necessary to increase theengine's speed. Normally, the oil sample is taken atlow idle. If the flow rate is too low, increase enginespeed to high idle in order to obtain the oil sample.
In-line sampling valves cannot be used onnonpressurized oil systems such as differentialsand final drives. Use of the sampling gun is thepreferred method for nonpressurized oil systems.
Refer to the Operation and Maintenance Manual,Maintenance Interval Schedule for the properinterval.
The SOS oil analysis is composed of four basictests:
Wear metal analysis
Infrared analysis for oil condition
Tests for contamination of the oil by fuel, by water,and/or by antifreeze
Particle Count for hydraulics, transmissions andother gear compartments
Consult your Caterpillar Dealer for completeinformation and assistance about the SOS oilanalysis program.
i00941697
Sampling Interval and Locationof Sampling ValveSMCS Code: 1000; 7000; 7542
Take the oil samples as close as possible to thestandard intervals. In order to receive the fullvalue from SOS oil analysis, you must establisha consistent trend of data. In order to establisha pertinent history of data, perform consistent oilsamplings that are evenly spaced.
Mobil
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41Maintenance Section
Lubricant Specifications
Table 14
Compartment Recommended Oil ChangeInterval
Recommended SamplingInterval
Sampling Valve Oil Type
Engine 250 Hours 250 Hours Yes DEO
Transmission 1000 Hours 500 Hours Yes TDTO
Hydraulics 2000 Hours 500 Hours Yes HYDO
Differential andFinal Drive
2000 Hours 500 Hours No TDTO
Consult your Caterpillar dealer for completeinformation and assistance in establishing an SOSprogram for your equipment.
More Frequent SOS SamplingImproves Life Cycle ManagementTraditionally, the suggested SOS samplingintervals have been at each oil change, 250hours for engines, or every 500 hours for all othercompartments. However in severe applications,more frequent oil sampling is recommended. If themachine is operated under a high load and/or hightemperature condition, sample all compartments atevery 250 hours of operation.
ApplicationStudies have revealed that obtaining oil samples atevery 500 hours is too long a time interval in someapplications in order to predict potential failuremodes. A sampling interval at every 250 hoursprovides more data between oil change intervals.More data increases the chance for detecting apotential failure.
Determining Optimum Oil ChangeIntervals
Sampling the compartments at every 250 hoursprovides information for oil condition and for oilperformance. This information is used to determinethe optimum usable life of a particular oil. Also,more points of data will allow closer monitoringof component wear rates. Close monitoring alsoallows you to obtain the maximum use of the oil.For detailed information on extending oil changeintervals, please contact your Caterpillar dealer.
Optimizing Component Life CycleAn increase in the number of oil samples providesa better definition of the trends in data between oilchange intervals. More oil samples will allow you toclosely monitor wear patterns of components. Thisaction will ensure that the full life of the componentsare achieved.
The standard interval that is used between SOSoil samples is 250 hours for all Caterpillar engines.While 500 hour intervals remain acceptable fornonengine compartments, these intervals are notnecessarily optimum. If the machine is operatedunder a high load and/or high temperaturecondition, sample all compartments at the 250 hourinterval.
