Ford 6600 injector pump

I'm at witts end. I've replaced the injector pump with a rebuilt one. Bled the fuel system numerous times. Still have the same problem. The tractor will start and runs great. But after sits for a day or more it won't start. I've cracked the bleed plug on top of the filter and get fuel as soon as I work the pump handle. No air just fuel. Have to crank the engine for a long time and it will start and run fine. I can restart it at eny time without a problem. Only after it sits for overnight or so that it won't start. WHAT IS MY PROBLEM?
 
You either have a lift pump pressure problem, or maybe a sticky rack inside the pump. Did you check the lift pump pressure like I suggested in your prior post?

If you have good lift pump pressure, suspect a sticky rack internal to the pump. To check, with reference to the image linked below, remove cover #91 and parts 87 and 88 (2 each). Grab one of the 4 plunger collars # 19 and tickle the rack #18 back and forth a little while you crank. If that makes all the difference, report this info to the folks who rebuilt your pump. Just tickle this rack, don't force it all one way or the other. Once the engine fires off, take your fingers off the rack.

One more note: If the pump has anti-tamper lock wire on the cover bolts #93, you'll likely void any warranty you might have on the pump.
Injection pump
 
No, The injector pump went out so I replaced it. The system just does not hold the prime after a day or so. The Diesel shop wheere I got the rebuilt pump from says I must have an air leak some where. But have no fuel leaks.
 
Sounds like the problem is with your reman pump then. Did you try either of my most recent suggestions?

If you don't want to pull the rack cover off, try starting it in the morning after you push in the excess fuel button. If it takes right off then, it's about got to be a sticky rack issue.
 
What excess fuel button are you talking about? There is a fuel return line that connects onto the top of the injector pump and runs to the injectors and back to the fuel tank. It's bolted on with what I call a Banjo bolt. Could one of these lines be leaking air. There are 2 of these Banjo bolts, 1 is the one I mentioned and the other bolts the oil overflow onto pump oil tank. Wonder if these Banjo bolts are the same?
 
This new rebuilt injector pump looses its prime after 24-36 hours. I'm told that there is an air leak that causes this. It would have to be from the small plastic lines that connect to the injectors, the near top of the injector pump and the fuel tank. There is what I call a Banjo bolt that connects these lines on to pump. There is no fuel leak when the engine is running or at any time. Do you have any ideas on what is causing this problem?
 
Locate the shutoff lever shaft on the pump. This lever pivots around the excess fuel button. Said button is also discussed and shown in the owner's manual.

An air leak in the return line is not going to cause the problem you are having.
 

Excess fuel (cold start) button is located in the end of the fuel shutoff control

mvphoto89918.jpg


To operate the button the shutoff lever must be in the run position (full forward) and hand throttle lever at lease 1/4 open
On a cold start I like to open the throttle 3/4 or more and then idle the engine back to around 1000 rpm once the engine starts to fire up, once it's warmed up some I'll idle it the rest of the way down
 

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