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  Frequently Asked Questions


Q: What is StrataPore™ media?
A: StrataPore is a synthetic media made exclusively by Cummins Filtration. It has high efficiency capabilities with exceptional dirt holding capacities.
Q: What is the recommended oil and filter change interval for your Combo Lube or Venturi Combo Lube Filters?
A: Cummins Filtration recommends changing your oil and filter by your engine manufacturer's recommendations.
Q: What is a by-pass filter?
A: A by-pass filter, not to be confused with a by-pass valve, is a high efficiency low flow filter which filters a small percent of the engine oil at one time. By-pass filters are very effective at removing the smaller wear-causing contaminates due to their high efficiency of filtering smaller contaminates. By-pass filters are always used in conjunction with a full flow filter.
Q: What is a full flow filter?
A: Full flow filters filter 100% of the oil which goes through the engine.
Q: Your catalog, under chapter Product Guide, mentions Lube Oil and Hydraulic filters' by-pass setting, what is this?
A: Each lube oil filter and hydraulic filter system is equipped with a by-pass valve to ensure that main components in the system are sufficiently lubricated, independent if oil is cold or filter is blocked by excessive contamination. The by-pass valve can be located in the filter or filter head. Depending on the OEM-manufacturer's specification, the setting of the by-pass valve can be different. The Cummins Filtration catalog lists the setting of this valve (14.7 PSI = 1 bar). If no setting is mentioned, no by-pass valve is mounted in the filter.
Q: Your Product Guide also mentions Lube Oil and Hydraulic filters' anti-drainback valve, what is this?
A: The anti-drainback valve is fitted in filters for applications where the risk exists that the filter is running empty. This situation has to be avoided. Otherwise wear will occur on the moving parts as these parts are not yet lubricated by oil.
Q: Can a by-pass filter have a by-pass valve?
A: No, by-pass filters do not require a by-pass valve. A by-pass valve is required in full-flow filtration to make sure that the engine gets lubrication when oil is cold or the filter is plugged. If oil is cold, by-pass filter will receive less oil flow and in case it is plugged, will not function anymore.
Q: What is the purpose of the hot melt beads on the outside of the element pack in lube applications?
A: The hot melt is applied to the surface of the element pack of lube filters to prevent the pleats from being pushed together when the element pack is subjected to fluid flow. Without hot melt being added to some applications, the pleats can be pushed together, resulting in short filter life due to the total surface of the media not being used for filtration.
Q: What's the difference between full-flow and by-pass lube filters?
A: A full flow oil filter is mounted in full-flow of oil, meaning all oil entering the engine is filtered. In full-flow filters, Cummins Filtration uses cellulose media (40 µm absolute) or upgraded media, such as StrataPore (25 µm absolute). A by-pass filter is mounted in the by-pass, so approximately 10% of the lube oil flow is passing through this filter. Cummins Filtration offers high efficiency "real depth filtration" by means of its stacked disc media. As average size of wear particles in engines are in the range of 5 to 30 µm, these particles cannot all be filtered out by the full-flow filter; since such filters would be too restrictive. Therefore, the use of a by-pass filter, such as Cummins Filtration's LF777 or Centrifugal filtration system, will keep oil cleaner and result in less wear on moving parts of engines.
Q: Should the sealing gasket on a lube filter be lubricated before installation?
A: Yes, Clean oil should be used to lubricate the sealing gasket before the filter is installed on the head. This will ease installation and prevent gasket damage. Installing a filter with a dry gasket can result in fluid leakage and engine failure. Note: Grease should never be used to lubricate the sealing gasket. This can result in leaks between the gasket and head during the service interval.
Q: How tight should a lube filter be installed?
A: Installation instructions on the side of the filter should be followed to properly install the filter. The sealing gasket should be lubricated with clean oil, the filter should then be screwed on until the gasket makes contact with the sealing surface on the head, and then the filter should be tightened the correct amount of turns as specified on the side of the filter.
Q: Does Cummins Filtration® offer Extended Service Lube Filters?
A: Yes, Cummins Filtration®'s LF9000 series of patented Venturi™, combination full flow/ by-pass filters are direct replacement for many OE filters.
Q: What are the keys to extending lube service intervals?
A: (1) Use oil designed for Extended Service Interval (ESI) applications    (2) Use oil analysis designed for ESI to establish and verify change intervals    (3) Consult your engine manufacturer for recommendations on oil change intervals    (4) Use lube filters designed for ESI applications


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