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Case Tractors Discussion Forum
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Does diesel injector pump need priming

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Jim Gundlach

06-04-2005 09:08:02




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I just replaced the fuel line and fuel filter on my diesel 530. I started it up and it ran for a little while then acted like it ran out of fuel. Now it does not start. I did put fuel in the tank and I did turn it on. I read in the archives of this list that the injector pump was self priming, I'm wondering if I got air in the system that I need to bleed out. Anyone else have difficulty starting after changing fuel filters or messing with the fuel lines?

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Kelly Mt

06-04-2005 11:29:13




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-04-2005 09:08:02  
Your pump may be self priming but I've always had to crack an injector line at the injector to get them started. Do you see any white smoke while cranking? That will tell you if you are getting fuel. Some engines only need one line cracked others require all of them to get fuel to move the air out. PK



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Jim Gundlach

06-04-2005 13:17:06




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 Re: Does diesel injector pump need priming in reply to Kelly Mt, 06-04-2005 11:29:13  
No white smoke, I'll first try cracking one and cranking till I get fuel coming out. Many Thanks. Jim Gundlach



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Jim Gundlach

06-04-2005 14:21:40




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-04-2005 13:17:06  
Just popping one line to one injector does not seem to be enough. I've got to chagre the battery for a while then I will try popping all four. Jim Gundlach



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Jim Gundlach

06-04-2005 15:53:07




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-04-2005 14:21:40  
I pulled all four lines off the injectors, cranked until each was shooting a quick solid jet. Reattached the lines and still can't get it to start. I really don't know what to try next.



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big orange

06-04-2005 17:22:04




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-04-2005 15:53:07  
You need to leave them hooked to the injectors and just loosen till fuel comes out around the nut.You might have burnt the starter.



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Jim Gundlach

06-07-2005 18:34:09




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 Re: Does diesel injector pump need priming in reply to big orange, 06-04-2005 17:22:04  
Had a change to spend some time on the Case, the starter problem is one of poor wiring. The DPO (Damned Previous Owner) had previously burned the wire from the switch to the starter and when he replaced it he simply wraped a new wire around part of the old one. It was not making connection. I will be replacing all the wiring soon. Good news is starter works fine when the wires make good contact.

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Jim Gundlach

06-04-2005 17:50:21




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 Re: Does diesel injector pump need priming in reply to big orange, 06-04-2005 17:22:04  
Did I mess up the injectors too? Or do I just re-bleed after I get the starter working? Again, Thanks



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big orange

06-05-2005 13:35:19




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-04-2005 17:50:21  
Just rebleed.



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Jim Gundlach

06-05-2005 18:56:41




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 Re: Does diesel injector pump need priming in reply to big orange, 06-05-2005 13:35:19  
That is a relief. Thanks.



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Dan WV

06-10-2005 22:02:40




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 Re: Does diesel injector pump need priming in reply to Jim Gundlach, 06-05-2005 18:56:41  
Did you get it fixed ?
Im having the same problem.
New filters, Drained and cleaned tank,New hand pump.
I must be doing something wrong.
When I use the hand pump I see air bubbles in the bowl. Is this normal?
I can get fuel to the injectors but now cant get it to fire exept with either.
Any help from anyone????? Thanks Dan



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