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Farmall & IHC Tractors Discussion Forum
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460 Diesel Still Won't Start

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Ron Smith

06-07-2005 19:32:50




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I am still working on getting my neigbor"s 460 diesel started. It had not been started for several years. We have been pulling it without much luck. We replaced the filters and added some new fuel and octane booster. Did this based on some suggestions on this bb. The fuel screen was plugged up in the sediment bowl. We cleaned that up. We then had to clean out the primer bulb. The fuel was hanging up there. So, we now know we have good flow all of the way to the injector deal. If we remove the screw below where the fuel enters the injector deal, we have a good flow of fuel out of the screw hole. We then pulled it and it began to smoke. It did start and ran for all of about 15 or 20 seconds. When he stopped pulling, it died and that was it for this evening. After that, when we pull it, it wouldn"t even smoke. Might the injector system be plugged in somewhere? I pulled off an injector line and no fuel ran out. Not sure what to do next. I don"t know much about diesels. Seems like it might be stopped up still, possibly in the injector system. Does the injector system have a pump of some sort that runs off the engine or is timed off the engine? The way it is shaped, it seems that it may distribute the fuel that way-not sure. Any help or recommendations are appreciated.

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Hermit

06-08-2005 19:07:07




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
Bleed and re-bleed all filters and lines.



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Mike S 806/H

06-08-2005 08:21:32




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
A friend of mine has a 460 diesel, he has to take off the return line off to get it started, I guess there is a check valve that is bad, I think it threads in the bottom of the tank



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Lance R.

06-08-2005 20:38:10




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 Re: 460 Diesel Still Won't Start in reply to Mike S 806/H, 06-08-2005 08:21:32  
That check valve is a spring loaded one way valve that was used to keep fuel from running out the bottom of the tank if you had to diconnect the fuel return line. If that thing became plugged or needed to be replaced most guys didn't want the pay the bucks to replace it so they just put a cheap fitting into the bottom of the tank and attacked the return line back up. I replaced mine and I think it cost about $30 some dollars.

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ChadS

06-08-2005 07:56:58




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
There may be a screen, where the main fuel line hooks up to the injector pump, it is at the end of the fitting inside the pump. Most roosa master pumps have em, mite be plugged there?? The guys are right, fix those glow plugs, crack the fuel lines at the injectors, and turn the engine over, or pull it till you get solid fuel out those fittings. I had a Ford F-350 7.3D have the pump go out, and had to go thru all this.. sounds like you had fuel to one or two injectors, then it bled out from air coming out. If you dont get fuel to the injectors, after all that, you may look round for a new pump. maybe one off a combine? Chad

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Aces

06-08-2005 06:12:05




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
Ron the 460 is not supose to start with out the glow plugs. One thing that could have happened is the fuel return line got pluged if so it will never start, then that pump has a deliever valve if it is not working it will never start. As for the drive shaft braking, take the timing plate off the out side of the pump and turn the engine with the starter and see if the pump turns, the timing plate is the one with 2 screws in it. No need to pull or the tractor or the glow plugs untill you get good fuel out the line at the injestors. The return line to the tank as a check valve in it where it comes out the top of the pump make sure it is ok and fuel can flow through it.

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Allan in NE

06-08-2005 05:59:53




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
Ron,

You had 'er right to the gate, then stopped.

Those old diesels are a stinker to pull start because they need the pre-heat. Since this one hasn't run in a while, you are more than likely fighting both a cold cylinder situation and also air in the system.

Pull 'er again and this time keep a pullin' until she can run on her own so that she can purge the air in the system. If you see white smoke, that means you are getting fuel, so keep pullin'. She'll run.

Allan

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EricB

06-08-2005 04:38:29




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
Migraine brought up the point about preheating your glow plugs. I don't know about your model but a lot of tractors require preheating of the glow plugs. If so there should be a preheat button. Maybe someone else can comment on the 460



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migraine

06-07-2005 21:16:39




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 Re: 460 Diesel Still Won't Start in reply to Ron Smith, 06-07-2005 19:32:50  
I would loosen all the lines at the injectors and get fuel to each one and one by one tighten them up. But if you had smoke at first and now don't, you may have twisted the shaft off in the pump or lost some other parts in the pump. it will take a fair amount of pulling to get fuel up through the lines. They are a cold starting motor without the glow plugs helping you warm it up inside. migraine

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Ron Smith

06-08-2005 15:56:26




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 Re: 460 Diesel Still Won't Start in reply to migraine, 06-07-2005 21:16:39  
Thanks for the pointers. I will give it another try tonight. I will check the line where it enters the injector pump. Maybe there is another screen that is clogged there. Also, we will check to see if that return line is clear. We were looking at that line a little bit last night. I bet that the fuel is not making it through the retun line. The primer bulb is clear, but it won't prime. I guess the leathers are shot. We were using the glow plug switch when pulling and it seemed as if they were working. It has a new battery in it. Hope we didn't twist the shaft off. We'll try the other checks first.

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