KAMA 454 engine dies when warm...
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bjr
Veteran Member
I've posted this before, but I don't know if Jinma and Kama systems are the same. Get rid of that POS fuel valve on the bottom of the tank and put a regular 1/4" needle valve. Those OEM valves have very small and easily plugged orifices and don't let any fuel get to the pump. That was one of the very first Mods I did when I assembled my crate tractor. I'm surpised that there hasn't been anyone else notice how small those valve orifices are. bjr
Bob Rooks
Elite Member
Have you checked for diesel bugs, and that small sintered filter in the fuel tank connection?
Smalljobs
Gold Member
Is there a way to measure fuel pressure when "normal" and then again around the time when it begins to quit?
Bob Rooks
Elite Member
Yes. You can purchase a digital min-max pressure gauge complete with sending unit for around $450.00. Check the Omega Pressure catalogue for your choice.
Or, you can install a dash mounted Murphy Switchgage and wire it for a light or buzzer for close on rise or close on fall (you pick the setpoints). About $85.00.
Or, you can just install a simple dash mounted pressure gauge like an oil pressure gauge, and just keep your eye on it. About $25.00.
Or, you can install a dash mounted Murphy Switchgage and wire it for a light or buzzer for close on rise or close on fall (you pick the setpoints). About $85.00.
Or, you can just install a simple dash mounted pressure gauge like an oil pressure gauge, and just keep your eye on it. About $25.00.
Ive checked the fuel bowl under the tank and its full.....as well as the upgraded fuel filter that is inline with the bowl and the injector pump. When it dies next time, Ill pull one of the injector lines and see if fuel is coming out of the pump. I thought I tried this before, but dont remember the results. I also have tried priming it when it dies and doesnt do anything. Seems temp related. Double checking and will most likley just replace all the fuel lines again. Thanks...
Diamondpilot
Super Star Member
- Joined
- Jan 18, 2007
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- Daleville, IN
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- Jinma 254/284 Ford 861 Powermaster at work
What is this upgraded filter? If you have fine filter prior to the injector pump and are relying on gravity from the tank to keep it full? That may be your problem right there. I could see the filter going dry then refilling via gravity while you fiddle with it then the whole process happening all over again.
At this point its very important to tell us the whole story? Why the upgraded filter? Not just you but a lot of the time we get bits and pieces and then we find out "oh yea I just did _________" and now it will not run. All this after 2 weeks and 45 post later.
Chris
At this point its very important to tell us the whole story? Why the upgraded filter? Not just you but a lot of the time we get bits and pieces and then we find out "oh yea I just did _________" and now it will not run. All this after 2 weeks and 45 post later.
Chris
Bob Rooks
Elite Member
Chris is right.
In fact, you can run completely out of fuel and the sediment bowl will still appear to be full. If you checked your fuel lines once then they are still probably OK.
I had similar symptoms, see here: Chinese Tractor Owners Association - CTOA Forums - Tractor/Dozer Engines - TY395 engine stalls.
In fact, you can run completely out of fuel and the sediment bowl will still appear to be full. If you checked your fuel lines once then they are still probably OK.
I had similar symptoms, see here: Chinese Tractor Owners Association - CTOA Forums - Tractor/Dozer Engines - TY395 engine stalls.
Diamondpilot
Super Star Member
- Joined
- Jan 18, 2007
- Messages
- 16,316
- Location
- Daleville, IN
- Tractor
- Jinma 254/284 Ford 861 Powermaster at work
Take that filter out of the loop for a test run. Should be easy to do since its just using hoses and clamps. I have a gut feeling that is the problem right there. Maybe the filter is full of bugs or something like Bob said.
Sorry if I came off harsh before but my goal is jut to get your machine running.
One other thought is when you have the hoses off to bypass the filter make sure they are clear and not soft inside. Many hoses are not rated for diesel and especially a bio mix. They will soften and gum up the works.
I also don't like how the hose from the filter to the pump is routed. It runs lower than the filter then back up to the pump requiring it to suck fuel. I has been doing all right but the system is designed to run by good old gravity and the way that hose is ran and the position of the filter may be causing problems also. Have you simply tried filling the tank up 100%? I worked on a Case Dozer for a neighbor that had the same symptom and I guess the injector pump was getting weak and when he was working on a incline it could not pull fuel up hill. By filling the tank it would work fine. I guess the extra push from the larger head of fuel gave it the pressure needed. Ended up putting a cheap $20 electric fuel pump on it right at the tank which is mounted behind the operators seat to push fuel to the injector pump.
Chris
Sorry if I came off harsh before but my goal is jut to get your machine running.
One other thought is when you have the hoses off to bypass the filter make sure they are clear and not soft inside. Many hoses are not rated for diesel and especially a bio mix. They will soften and gum up the works.
I also don't like how the hose from the filter to the pump is routed. It runs lower than the filter then back up to the pump requiring it to suck fuel. I has been doing all right but the system is designed to run by good old gravity and the way that hose is ran and the position of the filter may be causing problems also. Have you simply tried filling the tank up 100%? I worked on a Case Dozer for a neighbor that had the same symptom and I guess the injector pump was getting weak and when he was working on a incline it could not pull fuel up hill. By filling the tank it would work fine. I guess the extra push from the larger head of fuel gave it the pressure needed. Ended up putting a cheap $20 electric fuel pump on it right at the tank which is mounted behind the operators seat to push fuel to the injector pump.
Chris
