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 11-04-2008, 21:04 Post: 157668
kkocher13



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 Need help with my Mt 372

I just bought a Mitsubishi MT 372. It wasn't running, so I went through the motions to try and get it to start. It had not fuel so I bled the system and I'm 99% sure its getting fuel now, because I get a rich diesel smelling whit smoke out of the exhaust pipe. However I can't get it to fire. I pull the glow plugs out of the block and run 12 volts (from a battery charger) to them and they light, but when I put them back into the block they don't seem to to get hot. I would love to get this thing running without going to a dealer, does anyone have any ideas. It might crank a little slow, but I put Jumper cables from my truck on it so I'm pretty sure that should be enough juice. Any suggestions????






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 11-06-2008, 09:12 Post: 157702
kthompson



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 Need help with my Mt 372

Without the jumper battery will it turn over? If so does the second battery speed it up? Just trying to be sure the battery in it is not so dead it is still hurting you.

Do you have any way to test if current is getting to the glow plugs? Are you sure you are engaging the glow plugs?

Any reason given to you or history on why it was not running?

Have you checked to be sure the air intake is open, no insect or rodent nests?

Not a question you asked but have you checked the fluids for water? Engine oil and transmission? It probably would be good to replace them to begin with along with filters. You don't want to pump trash.

Glow plus and starting fluid are not good combos. If all else fails, I still find a good pull works. There are those who will say should never be needed or used. If you do, you be sure you have two drivers who know what to expect and are very careful. kt






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 11-06-2008, 15:58 Post: 157719
kkocher13



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 Need help with my Mt 372

got a new battery today will hook it up tomorrow and try it. The glow plugs were working, but I had to by pass the switch, which unfortunately was not working. Still no fire though. I'm going to check the fluids this weekend and see what they look like. I feel like the engine isn't turning fast enough, so hopefully a new battery will help.
The person I bought it from said it ran, but sat for 2-3 years and then wouldn't start. I'm going to really give it a good once over for fluids this weekend. I'll let you know what I find, but let me know if you have any more advice.






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 11-06-2008, 16:16 Post: 157721
kthompson



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 Need help with my Mt 372

If I read it correctly it was out of fuel and your put NEW fuel in it. Have you check to be sure there is no water in the fuel? No gelled fuel either? It would still be smart to replace fuel filter.

Hope you well. There are much better minds on this than mind, sure they will chime in. kt






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 11-06-2008, 16:19 Post: 157722
kthompson



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 Need help with my Mt 372

The safety switches I have seen don't let the engine turn over. Guess it is possible you could have one that cuts off the fuel. But you are getting fuel into the cylinder it sounds like.

Some one may holler safety and ok, if I was able to do so safely, I would give it a slow pull. It seems an engine that sits for a while can just be a pain to fire the first time. kt






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 11-07-2008, 07:51 Post: 157731
candoarms



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 Need help with my Mt 372

Kkocher13,

As Kthompson pointed out, I believe you'll need to go through your tractor from top to bottom.

If the tractor was out of fuel before it went into long-term storage, look for "gunk-n-stuff" in the fuel tank, fuel lines, fuel filter, injectors, and injector pump. Also, be sure to inspect the air intake system from one end to the other. Lastly, take a good look at the exhaust system to be sure you don't have a blockage in there somewhere. All of these things can foul up the diesel combustion process.

A thorough cleaning of the fuel system is certainly called for here. Look for rust in the fuel tank while you're at it. (The fuel tank was empty....this is very bad news.)

If you haven't yet tried running a bottle of Sea Foam through the fuel system, that might be a good idea. Sea Foam is a very good product. It will dissolve any solids left behind from the dried diesel fuel.......but it may also plug your fuel filter, and even the injectors, when the gunk finally lets loose. (See the link below.)

You could have quite a project on your hands, but with a little determination and elbow grease, you might have yourself a real good machine when you're done.

Joel






Link:   Sea Foam - Diesel Treatment 

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 11-07-2008, 09:50 Post: 157734
kkocher13



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 Need help with my Mt 372

I've got fuel all the way up to the injectors, however I don't know if the injectors are dirty. Are they easy to clean and what should i use to clean them. I'm probably just going to take off all the lines and clean everything. I have a rich white smoke coming out of the exhaust. So it leads me to believe fuel is getting into the system, but I don't know if its dripping in because of a sticky injector or being sprayed. I only removed the air cleaner so far I need to take off the whole plenum and check for blockages. Same with the exhaust pipe. Hopefully If I put some good time into it, I can have it running by the end of this weekend.
Also, If I would try to pull start, what gear should I use, Hi or low, and do I need to use the glow plugs at all.






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 11-07-2008, 10:17 Post: 157735
candoarms



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 Need help with my Mt 372

Kkocher13,

Try using a product like Sea Foam (there are many others to choose from) to clean the injectors. Just follow the instructions at the link I posted earlier.

You may have to physically remove the injectors if you find that the fuel tank is full of gunk-n-stuff.

If you attempt to pull-start the tractor, put it in 4th gear and be ready to depress both the clutch and the brakes as soon as it fires. If you attempt to pull-start it in any lower gear, the rear wheels will just slide.

Joel






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 11-07-2008, 10:26 Post: 157736
Murf



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 Need help with my Mt 372

I wouldn't suggest touching the injectors, they're not really a "user serviceable" part.

You are correct, if you have white smoke coming from the exhaust when you crank it over you have fuel in the cylinders. The white smoke is indicative of fuel that is burning, but just barely, sort of the equivalent of smoldering.

This means the engine is not achieving a "stoichiometric" mixture (a big word meaning the right ratio of fuel to air to support combustion).

This is caused by one (or more) of three things, a) you aren't getting enough fuel, or as you touched on, it's coming in one big spurt instead of a fine spray, or b) the engine is not enough air, likely from cranking too slow, or c) the engine is not achieving enough compression cause proper ignition.

Start with the easiest, cranking speed, not necessarily caused by just a weak battery either, a starter on the way out can crank too slow but still appear to be working, this though will cause the starter to draw too many amps, a multi-meter will easily diagnose this.

Next try to bypass the tractors fuel system, spray WD-40 (and lots of it) straight down the intake while cranking it over, if it lights up on that and continues to run, the problem is cranking speed. If it starts on WD-40 but dies when you stop spraying, the problem is in the fuel system.

Best of luck.






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 11-07-2008, 11:13 Post: 157737
kkocher13



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 Need help with my Mt 372

As far as starters go, how many amps should they draw? And if it is drawing to many amps whats my next course of action. New or rebuilt?






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Discussion Boards > Active Subjects > Messages as Posted > Mitsubishi Forum

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