Rebuilding a Facet 40133 fuel pump.
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- čas přidán 15. 06. 2020
- Typically used on 4kw generators, these are a reliable pump and can be easily rebuilt.
TLDR (and this is an update, don't remember if I touched on this in the video): There's a filter not included by default with the 40133(e), but it works fine with the model of pump. There's a large gasket supplied for the base in the kit, and it's an exact replacement for the original.
There is not a gasket supplied for the top of the shuttle. But it turns out, the pump runs fine without it. - Zábava
This pump design was first produced by Bendix Corp and was acquired by facet a couple of decades ago. There are possibly dozens of models that have been used in aircraft engines, Jaguar and Land Rover cars, all sorts of US cars and tractors. New ones are available that are now manufactured in China. (You can buy a Bendix label to stick on your Facet(?) branded pump to make it look original.The design is simple and very reliable. I had one on my Cessna so you can be sure they are reliable. Just about all parts are interchangeable but the spring determines the fuel pressure. Most operate between 2 and 6.5 PSI. Most typical engines with carburetors are happy with around 4 psi.
The carburetor usually has the filter shown in the video. It is a 'service item' and expected to be replaced or cleaned periodically. Car owners and mechanics rarely know this so do nothing until the pump fails to deliver enough fuel as the filter becomes clogged. Modern gasoline supplies tend to be very clean but ... They often contain ethanol which will destroy the edge of the rubber seal and begin to leak if the particles don't clog the filter first.
Any small aircraft parts or service supplier will carry the service kit. The pumps have to be serviced regularly per FAA regulations. But their price is always high due to the cost of all the paperwork and certification involved in making and installing parts in aircraft.
I have found the Pegasus Auto racing Supplies carry the parts individually and are priced lower than the aircraft equivalent. Facet (nee Bendix) fuel pumps were used extensively in Cobras, Ferrari, Alfa Romeo and many other race cars and motorcycles that are now considered historic and I'm very happy that Pegasus sell these parts so I can keep my old cars running. Oh, even boat engines have used this pump.
Sadly we have become a nation of component re placers. Mechanics don't dissemble and repair. They just install a new whatever. Engine, gearbox, computer, fuel pump, etc. As such finding the internal components is all but impossible without buying a complete pump. If anyone finds a source for the internal pump parts please list it here.
my boy is wicked smart
Thanks. Glad you enjoyed.
I forgot to mention. The easy way to reinstall the spring clip that holds the valve in place is to put the spring in first, slightly below where the ends will go into the two holes that secure it. Then install the valve. Hold it down with your finger tip and with a pair of needle nose pliers pull the ends of the clip up into the holes. Simple.
After reassembly the pump can be quickly tested by jumping 12V across the connections (assuming it is a 12V pump). The polarity is stamped into one of the two mounting brackets. These pumps were available in both positive and negative ground and also for 24V applications.
Oh, and BTW. Bendix was a US company so the dimensions are best measured in Imperial units, not metric.
cool video
Wouldn't that o-ring seal the plunger to the body preventing the pump from leaking if the pump was run in a parallel application for an electric and mechanical pump? The poppet valves prevent back flow during operation as the pump is allowed some inefficiency, but there is no perfect seal between the plunger and the plunger tube when the pump is turned off, right?
There is no mechanical pump parallel this one on this application. With enough fuel pressure on the outlet side of the 40133, it's entirely possible to have fuel go back. The pump works in a way, that if there is an upstream carb inlet float valve that's closed, the pump will not overpressure the line and force fuel past. But the pump can and does lift fuel, some 9 ft vertically. It's pressure range is very specific. And if there was a pump that did not allow for backflow when the carb valve closed, I wouldn't want it. It would push past the closed carb valve and flood the area.
The 40133 is not part of a kind of parallel pumping as you described. What you are proposing is novel and unique, afaiaa {however, reading it's application in aircraft uses, it occurs to me that you may be referencing that}. In which case, I suggest you add a fuel solenoid to the inlet side of the 40133, to completely shut-off backflow that could occur if the pump was de-energized.
Can you tell me where you bought the rebuild kit,thank you
Probably aircraft spruce. I didn't see your message until now, sorry. Didn't have notifications properly set-up.
Facet.......Faucet is on the seenk
How do you know if its bad? I have a Onan 4kw generator with one of these and it works fine till I start the RV then it dumps fuel out the carburetor. Could this be a bad electric fuel pump?
it also will dump gas out of the generator carburetor without the generator running as soon as the RV starts
@@briangriffin5563 sounds like you have a float sticking, or a needle and seat problem. Or it just needs to have the proper adjustment for float height. Hopefully this helps you.
Yep. Generally if the float valve is stuck or the float is bad, either one can cause that float valve to stick open. 99% a modern fuels problem causing it.
However, knowing that these Onans were slung underneath sometimes, and that if you hypothetically pressurized the pump's fuel inlet enough, fuel would slip past the pump's poppet valves to the outlet...
I'm wondering if, instead of it being a siphoning issue, your pump pickup inlet feed was changed from the neutral pressure pick-up tube that goes down 3/4 of the way into the main motorhome fuel tank, over to T-ing off the outlet of the electric pump inside the fuel tank. In which case, the pressure and volume coming out of the tank electric pump, every time you run your main engine, would push past the poppet valves in the Facet 40133, and also be enough pressure to force your generator carb fuel float valve open. That would flood your gen carb, spilling gasoline, everytime you ran your main engine.
This flooding would also occur, if someone added an inline electric pump aftermarket, and somehow it's outlet was T'd to go both to your engine and your generator, when it should only go to the generator.
Sounds like someone attempted a repair due to old cracked fuel line hoses or a dead main tank electric fuel pump, and routed the outlet incorrectly.