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Old 08-19-2017, 05:27 PM   #1
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DT466 first start help needed

I was hoping someone could help. I did a in frame overhaul on a 1996 DT466. It's a mechanical engine, no electronics. I can't seem to get fuel to the injectors. I cracked the lines at the injectors and turned it over a whole bunch. And nothing. I did put a new filter on it and cleaned the strainer as well. When I push the primer thing, it does not get hard. Any suggestions? I'll attach a photo
Also, with the amount I turned it over I would expect the oil pressure gauge to register. But it hasn't yet. Maybe it has to run a bit first? Thanks, I have built many gas engines but this is my first diesel.
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Old 08-19-2017, 05:33 PM   #2
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Here is the photo:
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File Type: png untitled (10).png (629.8 KB, 12 views)
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Old 08-19-2017, 05:37 PM   #3
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You mentioned cracking the lines to bleed but you did not say if you got fuel delivery. Have you or not?

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Old 08-19-2017, 05:44 PM   #4
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No fuel delivery yet
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Old 08-19-2017, 06:02 PM   #5
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when you put in the new filters did you pre-fill them with fuel? same with oil filter ..it takes a long time to fill up both oil filters if they werent filled when you installed them.

if you loosen the pressure line coming from the primer pump to the main pump, you should be able to get fuel there.. until you get fuel there you wont have any up at the injectors. and it may be that your primer pump is just building up air pressure into the main pump making it tough to get any fuel. if that line is loosened it may make things easier to prime
-Christopher
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Old 08-19-2017, 06:10 PM   #6
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Yes all filters were filled.
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Old 08-19-2017, 06:13 PM   #7
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I know if my DT360 loses prime.. which it seems to liek to do. (and trhats without disassembly). i have to pump that primer pump quite a bit. (50X or more) to get fuel up.. and thats without it being torn down and rebuilt.
-Christopher
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Old 08-19-2017, 06:29 PM   #8
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I loosened the bleeder screw on the filter housing and fuel came out. Also I am getting a small amount of fuel on number 6 but no others.

I am not feeling good about cranking it over so much with no oil pressure. Hummm
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Old 08-19-2017, 07:05 PM   #9
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Quote:
Originally Posted by Clayton View Post
I loosened the bleeder screw on the filter housing and fuel came out. Also I am getting a small amount of fuel on number 6 but no others.

I am not feeling good about cranking it over so much with no oil pressure. Hummm
Trust your gut. Don't crank it until something is pushing fuel up to it. Some filter/separators have primer bulb- push 100 times. Some engines run lift pump 15 seconds on each key bump- no need to keep cranking. listen for whirr of lift pump.

I moved lift pump on my 5.9L cummins from sucking by engine to pushing in back by tank as injection pumps $$$ are expensive and can be fussy about pressure. Lift pump are happier pushing fuel.
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Old 08-19-2017, 07:17 PM   #10
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Quote:
Originally Posted by Clayton View Post
I loosened the bleeder screw on the filter housing and fuel came out. Also I am getting a small amount of fuel on number 6 but no others.

I am not feeling good about cranking it over so much with no oil pressure. Hummm

All but #6 aren't getting fuel so you still have air in there.

How long did this bus sit without running?

I forgot exactly what you rebuilt but what's that about? Did it go well or do you think it may have issues because of something you did?

You need a good plan of attack or your starter will be toast heating it up like this.

Get rid of the air and think well what's next? Old dirty fuel, better buy a lot of filters till you get it clean again.

Air filter good? Water in fuel? Drained that lately? Making steam is not a good thing in the cylinders if any moisture might be in there.
You might get lucky and get it going but sounds like a lot of maintenance ahead to get running good again.

I don't think you'll see oil pressure on the guage till there is some flow happening so not till it runs. Then it should settle down to whatever level of pressure it is supposed to be when the oils has warmed up and circulated and forcing air out of the system.

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