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Power Systems

Eaton Direct-Ported STC Connectors Eliminate Oil Filter Fluid Leakage on Recreational Vehicles

“Direct porting the female STC® fitting into the manifold, instead of using adapters, has reduced the number of fittings in the hydraulic system and therefore possible leak points. Since 2008, we’ve been supplying the generator manufacturer with the new oil filter relocation kit concept using STC direct ports, and it has not experienced oil filter leakage since.”

Chad Flemming
Power Systems certified fluid power specialist and sales representative

Background

Over 30 million Snap-To-Connect (STC) fittings from Eaton have been sold for worldwide applications in which leak-free performance is a requirement. The robust threadless connector is a patented alternative to conventional threaded-type fittings commonly used in fluid power systems with working pressures up to 5,000 psi. Assembly does not require the use of wrenches or other special assembly tools. Connecting halves are simply pushed together. The result is reliable, leak-free connections—in a snap.

The high-pressure threadless connectors have helped Power Systems, an Eaton Premier Select distributor in Chanhassen, Minnesota, solve a weighty dilemma involving oil leakage in diesel generators used in RVs.

Challenge

The generator manufacturer called on Power Systems’ Chad Flemming, certified fluid power specialist and sales representative, to take a look at the generator’s oil filter, which was the source of hydraulic oil leaks that have caused warranty claims on some very costly RVs.

Flemming quickly saw that the oil filter was connected to the unit’s engine with a multitude of different hoses and adapters, and each connection was a potential leak point.

“The original position of the oil filter on the generator’s diesel engine posed many fluidconveyance routing challenges, resulting in fluid leakage,”Flemming says.

The generator manufacturer needed an immediate solution in order to continue to sell its products to the high-end, bigticket RV market.”

Solution

Flemming consulted Eaton’s Troy Hobot, area sales manager, and together they conceptualized an improved, screw-in, oil filter relocation kit solution that Power Systems could design and produce to virtually eliminate oil leakage near the engine.

The traditional method to connect the relocation kit to the engine would entail inserting threaded male connectors into female ports, which could result in potential leak points if the threaded connections aren’t properly assembled.

Thoughts quickly turned to Eaton’s threadless STC connectors that use a snap ring to connect the male with the female, which seals on an O-ring and results in a leak-free connection every time. In order to make the fluid conveyance solution complete, Eaton’s Aeroquip®FC699-06 hose would be used along with the male STC hose fittings.

To further safeguard against leakage and enhance fluid conveyance performance, Flemming and Hobot recommended direct porting STC connectors into the manifold of the oil filter relocation kit, which would eliminate the need for any type of adapter, thereby eliminating potential leak points altogether.

Results

The generator manufacturer quickly realized the problemsolving benefits of STC connectors and told Power Systems to move forward with the improved oil filter kit proposal.

Power Systems called on an outside machining source for a custom engineered and machined manifold for the oil filter that would incorporate female STC connector direct ports, which would connect to the mating male STC hose ends. The design proved to be a perfect fit, Flemming says.

“Direct porting the female STC fitting into the manifold, instead of using adapters, has reduced the number of fittings in the hydraulic system and therefore possible leak points.

“Since 2008, we’ve been supplying the generator manufacturer with the new oil filter relocation kit concept using STC direct ports, and it has not experienced oil filter leakage since.”

Power Systems’ success story demonstrates the flexibility of the STC product line, Hobot adds.

“The oil filter required size -06 STC female direct ports, and Power Systems and its machining source have invested in the necessary drills, assembly tools, and gauges to produce the direct ports. Their investment in equipment to manufacture the STC direct ports has paid off for all parties involved.

“STC’s flexibility makes it possible for distributors and machining suppliers to offer unique STC solutions for specific applications. As a result of the oil filter plumbing project, Power Systems has developed a solution that can be used on other applications as well.”