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timing injection fuel pump on dexta

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donaldcantin

07-02-2007 09:22:36

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Hi, we have a 1963 3 cyl ford dexta. Engine was rebuilt two years ago. Last fall, we were unable to start it. (cold start was more and more difficult) One os us had the idea of checking if timing was ok. He found that it was'nt good and fix it. But never worked. We try every possibility and still not worked. I founded yesterday that the indication on the fly wheel (TDC , SPILL 20 and SPILL 26) are not good. TDC (top death center) on the fly wheel is about 1 inch downway after the explosion (both valve closed)(I have inserted a straw inside the cylinder using the injector hole in the head and watch it moved). So using the straw i've located the reel TDC and marked the fly wheel then i've marked the location of spill 26. We've adjusted the injection pump with these new mark. But it still not working. Engine's cough one or two time but not more. I've tryed several adjustment around my new spill 26 and it doesn't worked too. We bleed the pump and everythings fine. I don't know what to do more.

Is it possible that TDC is at the bottom of cylinder??? Is it possible that the reference line on the injection pump are bad? We followed the procedure described in the owners manual. Manual tells to use spill 26 and the bottom line on the injection pump. I have tryed spill 26 with both line (bottom and top) I have a spill 20 indication on the flywheel but it's never mentionned in the book.

Please help

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Capp

07-02-2007 22:37:06

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Re: timing injection fuel pump on dexta in reply to donaldcantin, 07-02-2007 09:22:36

Donald,
You said,"Engine was rebuilt two years ago." How did it do for those two years? If it ran fine then it didn't jump time. These tractors have gears in the front cover and when you get them in time, they stay in. The only way you could have gotten her out of time is by taking the injector pump off and when putting it back on you didn't get the marks lined up right. You said, "He found out it wasn't good, then fix it," How did he fix it? You need to describe to us more about, how it ran before, then what happened when it quit? Did anyone take anything off of it? And if they did what? Have you been using either to start her? I hope not, because you may have done some damage to your engine.
I believe if it were me and after reading what you have said about all the wrong spill marks on the flywheel, I'd take the front cover off the motor and make sure all the timing marks line up, then you'll know. It's a little bit of work, but it sounds like that's all you have been doing for a while, this will solve the problem of the timing. Then if it doesn't start you may have bigger problems, I sure hope you didn't put the easy start to her, if you did you may have cracked a piston. Let us know how you come along with your problem.
Regards
Capp

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donaldcantin

07-03-2007 05:51:05

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Re: timing injection fuel pump on dexta in reply to Capp, 07-02-2007 22:37:06

Hi, I must say that after the rebuild, it works very fine during 1 summer. But cold start was becoming more and more difficult. The owner, decided to check timing. He discoverd that the marks didn't line up and tough it was the problem ( but remember, i said that the flywheel is not properly align) so he lined up all the marks. (by doing that, he put out of order all the setting). I'm pretty sure i've located correctly the TDC and SPILL 26 mark and after reading all post here, i'm asking myself if it's possible that the problem came from the injector or because of the owner who used ... ether ... shhh, not my fault. I'm just family and visit him 3-4 times a year. I'm pretty sure piston have not craked, compression is still very good. and since the rebuild he worked only 100 hours.

This is why i'd like to know if the TDC (top death center) is when the piston is at the bottom compression stroke or at top? I've supposed it's up and line my things whit it... but if it's down. During the lining process, i've made the engine turn backward... and the pump too.

thanks

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Capp

07-03-2007 21:30:45

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Re: timing injection fuel pump on dexta in reply to donaldcantin, 07-03-2007 05:51:05

Donald, TDC is on the top. But if your flywheel wasn't put on right then all the spill marks won't tell you a darn thing. Do yourself a favor and have a look at all the timing marks under the front cover. If you do it this way, you start by taking the valve cover off, then the rocker arm assembly, you don't want to make a mistake and damage a piston or a valve, then take the front end off your tractor, radiator and the whole nine yards to get to the front cover then take it off, then take the idler gear off, now turn the crankshaft gear timing mark straight up or vertical, then turn the cam shaft timing mark toward the center of the idler gear shaft, then the injector pump's timing mark points to the center of the idler gear shaft, you may need apply pressure to the injector pump to hold it in alignment, now install the idler gear so that the three timing marks on the gear align with the timing marks on the crankshaft, camshaft and injection pump drive gears, the engine will be in proper time now. Tighten the idler gear and you should be ready to start putting everything back together. I know this is a lot of work, but you will know if your tractor is in time for sure. Let me know how you come along on your project.
Regards
Capp

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woodache

07-02-2007 17:19:07

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What happened is Re:timing injection fuel pump on dexta in reply to donaldcantin, 07-02-2007 09:22:36

What happened is when it was overhauled someone got the flywheel off of the correct position. These flywheels will go on in any of the six positions but only one is right. The hole in the crank and the extra hole in the flywheel HAS to line up.

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Bob

07-02-2007 09:42:50

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Re: timing injection fuel pump on dexta in reply to donaldcantin, 07-02-2007 09:22:36

Which cylinder are you considering to be #1?

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donaldcantin

07-02-2007 10:00:12

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Re: timing injection fuel pump on dexta in reply to Bob, 07-02-2007 09:42:50

# 1 is the nearest to the radiator. front to rear as described in the owner manual.

thanks

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donaldcantin

07-02-2007 09:23:56

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Re: timing injection fuel pump on dexta in reply to donaldcantin, 07-02-2007 09:22:36

i'm a french canadian so if you don't understand something don't hesitate to ask question. thanks

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