I spent my life around the mechanical cat, I'm in the back of the short bus when it comes to these new 11 year old engines. There are some common problems that a Fuel Check Valve on Cat 3406e may face. If this happens, the engine will not get enough fuel. 10 for two "O" rings plus about an hour of my time.
If you don't know where is the fuel check valve located on Cat 3406e, it will be impossible for you to deal with that. If this component fails to give support to the engine by maintaining enough fuel pressure then you will understand by turning on the ignition. So is the fuel pressure regulator valve, the same thing as the fuel return bypass valve? Here we find both images that will help you to locate the fuel check valve. In order to troubleshoot a Cat 3406e gas engine issue, it is important to first determine where the fuel check valve is located. There are some more symptoms of a faulty fuel check valve on Cat 3406e. The fuel rail or filter is located near the air compressor of the Cat 3406 engine. I shopped around and got ours for under $40. Bottom gears from a stand still, all the clean smooth power I want. Cat c7 fuel pressure check valve. The fuel check valve is a small, circular device that prevents fuel from flowing backward through the engine. The Transfer pump must have a safety Valve in it incase the fuel filter gets blocked or there is another restriction in the system between the pump itself and the tank. Shim it up and then the valve in the filer base is controlling fuel pressure. How to Tell if Fuel Check Valve Is Faulty on Cat 3406e?
Tank vents all good. So, knowing the exact location of this component is a must before you start working on it. Working in a tight RV engine compartment, it's easy to see how a mechanic could cross thread or overtighten as was our case. The first test is to check the pressure in the fuel system. Fuel pressure regulator valve changed 3x. The air bleed screw is the one on the left side of the filter base and face out towards you. Another 6NZ fuel preasure ?? | Page 2. Low pressure can also be related to a faulty lift pump or clogged filters. We hope the question 'where is the fuel check valve location on cat 3406e' gets its answer. Where Is The Fuel Check Valve Location On Cat 3406e? If the pressure is low, it means that the fuel check valve is faulty. But I called around and the consensus is that if the sensor and pedal ( complete) is changed then no, no need to calibrate. The second check valve is located on the right side of the base facing the firewall. If this component is not working properly, fuel will leak into the engine, and the engine will not start.
After 10+ hours truckin, the same, all good. Check valves are relatively inexpensive. Why Do You Need to Locate Fuel Check Valve On Cat 3406e? This is a component of your fuel system that prevents fuel from going from the tank to the engine. If any of these symptoms you find in Cat 3406e, you have to locate it and then try fixing the problem. If your engine is not starting, you may have a faulty fuel check valve. There is a lack of information about the location of the fuel check valve on a Cat 3406 engine. Cat c15 fuel system schematic. We think then will help you.
It is known that the fuel check valve is located near the top of the engine in an area known as the fuel rail. Now the reason they are being shimmed is CAT has a weak spring in them allowing fuel to bypass internally in the fuel transfer pump. What is the relationship between the spring in the transfer pump and the pressure regulator valve? Fuel temps can easily reach 150*F by the end of the day in the summer monthsTom'o Thanks this. If you search for it there, you must find it. Cat c15 fuel check valve location diagram. As I recently found out, some CATs don't have a fuel return line. If you talk about Cat 3406e then you will find the same problem here too. One day " my" unresolved problem will also be behind me. If I'm off the throttle for 5+ seconds, ( coasting down a grade, rounding a curve to get on a big road, etc). Low fuel pressure can damage the injection pump over an extended period. There are some opinions that it is located on the base of the fuel filter in the Cat 3406e engine. Always use CAT filters. If the fuel check valve becomes blocked, the engine will not start.
Mike, Most diesels have a check valve to keep pressure at specs for the main injector pump. Good time to "overhaul" the manual primer pump too (if you have one). Open to ideas if you've got one. This device is prone to face troubles. CAT said zero blow by on injector seats and O rings when they ( under my platinum warranty) swapped out all 6 injectors trying to resolve my issue. Many times we see the engine not starting, not generating enough power, and even suddenly stopping working. It's driving me insane. The check valve is usually located on the side of the Bosch injection pump or in our case with the 2 cycle Detroit, located where the fuel returns to the tank. Very easy to check pressure. The red marks on both images are indicating the fuel filter.
This is universal, and the same is true for Cat engines too. Since fuel pressure is increased by shimming the spring in the transfer pump. Divider and divertor valves changed. All sensors replaced. Zero blockage in exhaust. In order to determine if your fuel check valve is faulty, you will need to keep eye on these things. Let's try finding its location and know some important things about it. The problem I've seen is this also increases the flow of fuel through the cylinder head and causes the fuel to pick up more heat. As a result, It will fail to start. Throttle positioning sensor was never calibrated was told not needed. A faulty fuel check valve will lead to excess fuel entrance into the engine and cause it to misfire. Cat 3406e Fuel Check Valve Problems. I can put foot to floor through all 18 gears and no issues.
The engine with a problematic fuel check valve will not be able to generate enough power. The Valve in the transfer pump is a safety valve as the return Valve in the filter head is the one that "Should" control Fuel pressure. Coolant temps climb, fan comes on and no way can I get RPM's above 1500 as it feels like I'm gonna rip the crank out with the vibrations and low power. This is only used when trying to prime the fuel system. But if the sensor "only" is changed then yes, it should be calibrated but the guy's at CAT say it won't make a huge difference.. Gonna get it done anyway, gotta get to the bottom of this. This valve only functions when the primer pump is used. Cat Return Check Valve January 08, 2016, 04:34:52 pm Quote from: mike leary - January 08, 2016, 03:44:18 pm Great news! Another 6NZ fuel preasure?? After the truck sits a few days, the same, smoooth running. But to locate the exact position, you need to know what is fuel rail and where it is located. Fuel pressure great.
If faulty, it can cause the pressure to drop or if cracked (like ours), allow air to enter the fuel system. Fuel supply lines new. Besides giving you the location direction, we tried to help you by giving related information on this component. But otherwise, I'd swear I was running out of fuel or timing is being thrown out. That was the way to locate the fuel check valve on a Cat 3406e. Another symptom of a faulty fuel check valve on Cat 3406e is not generating enough power. Another thing you can do to understand its problem. Both wiring harness replaced. The most common problem of a Cat 3406e fuel check valve is pressure controlling inability.
There are some common problems with a fuel check valve. Let's see what are the problems, their symptoms, and how to fix them. Any time I'm off the throttle 5+ seconds all is Good thereafter for usually the next 5 to 15 seconds of regular throttling. These problems are universal and these are true for all types of engines.
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