1991 F150 overflowing rear tank - F150online Forums
I have a 1991 F150 and the rear tank keeps overflowing. It looks like there is gas being pumped from the front tank into the rear. I have a 5.0L V8 and what I have read in the forums is that my issue is probably with the tank selector valve. Looking at my specific truck it doesnt seem to have one of these. The fuel lines just come together in a T fitting. Is there any other possible location?? Thanks If your truck does not have a selector valve, it has a shuttle valve in the Fuel Delivery Module in each tank. This is essentially a pilot-operated check valve which allows fuel to return to the tank only when the pump for that tank is running. If the rear tank is overflowing the shuttle valve for the rear FDM is stuck open. AFAIK the shuttle valve is not available as a service part, you will need to replace the entire FDM. 1996 F-150 XLT, reg. cab 6.5' box, 4.9 I6. E4OD w/ B&M alum sump, auxiliary cooler and external filter, Addco 1" sway-bars F&R, Bilstein shocks, 16 x 8 AR Bajas w/255/70-16s, Line-X spray in liner, hinged tonneau, Reese hitch and electric brake controller, VDO tranny and engine oil temp gages, stainless pushbar, Hella 550 fog and driving lights, Hella backup/work lights, 3.73 Trac-Lok w/ an alum. diff. cover with cap support screws, PFC "Z" brake pads, high flow cat with a 2.5" cat back with a FM 70 muffler.
Pilot Operated Check Valve - Bookshelf
Introduction to hydraulics and pneumatics
These are also manufactured as stackable valves. 5.4.1 Pilot-operated Check Valves A pilot-operated check valve is similar to a check valve with rated ...Fluid Power Engineering
5.4.4 Pilot-Operated Check Valves with External Drain Ports An additional external drain port (Y), allows the annulus area of the pilot piston (4) to be ...Fluid power with microprocessor control, an introduction
2.3 PILOT-OPERATED CHECK VALVES Pilot-operated check valves (Fig. 2.2) are similar to check valves but have a hydraulic or pneumatic pilot piston which ...Hydraulics and pneumatics, a technician's and engineer's guide
A check valve is also included in the tank return to prevent fluid being sucked out of the tank when the pump is turned off. Pilot-operated check valves The ...Oil hydraulic systems, principles and maintenance
Check valves can be direct acting or pilot operated. A pilot operated version ... Figure 6.2 shows a pilot operated check valve. It consists of a valve body ...Detect Articles Directory
Pilot Operated Check Valves
These pilot operated check valves. operate as a direct check valve but can. also be opened ... The amount of pilot pressure. required to open the valve is stated as ...
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