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Tractor Talk Discussion Forum

4010 JD bogging after rebuilt Injector pump installed

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mdeisenhauer

11-20-2023 08:54:54




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As the subject states, I recently installed a rebuilt injector pump on my 4010 JD and it's running, but lacks significant power.

What I've done so far, previously I was having a reoccurring issue where the tractor would run for 20 mins and then die, I could prime the low pressure pump and it would run again for 20 mins and then die again. (Note, when it was running, it was running strong) With help from this forum, I was told the drive ring was deteriorating and needed to be rebuilt.

So I sent my pump to a shop in NE for rebuild. I installed it at TDC with the timing marks lined up and the oil pump arrow pointing towards the block. I bled the injectors and it started right up. But when revving the engine, it coughs and sputters like it has half the power it used to have. I've tried clocking the injector pump both directions and it's basically acting the same, low power and smoking more than it used to prior to the rebuild.

Any ideas on what I need to do to get it running right?

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rrlund

11-20-2023 09:53:04




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to mdeisenhauer, 11-20-2023 08:54:54  

Not much chance that lightening will strike twice in the same place, but somebody on the Oliver forum had the same issue with an 1850. What it was was, when he hooked up the stop cable, he didn't have the lever on the injector pump down far enough. When he pushed the knob in, the lever wasn't going all the way down. He loosened the screw, pushed it down, re tightened it and that fixed it.



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tim s

11-21-2023 05:27:15




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to rrlund, 11-20-2023 09:53:04  
rrlund post has a good chance of what the issue is..I have seen this many times.



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Bob Bancroft

11-20-2023 09:43:57




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to mdeisenhauer, 11-20-2023 08:54:54  
I had a power issue shortly after installing a different engine, with new filters, in my combine. Turned out to be a restriction in the line coming from the tank.



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Dieseltech

11-20-2023 09:16:19




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to mdeisenhauer, 11-20-2023 08:54:54  
CLEAN the RETURN line across the injector tops. Broken pump flex ring bits will plug that line and cause injection pump trouble. This can be confirmed by running until engine begins to fail, then quickly loose the pump timing cover. If engine speeds up/runs OK WITH the fuel leak but slows/dies with cover tight, it's confirmed the RETURN side is restricted/plugged. Also, the EARLY 4AF/5AF pumps are timed at 10 degrees BTDC. The LATE UPDATED 1AJ pumps are timed at 8 degrees BTDC. The original 3010 and 4010 pumps had no speed advance like the 20 series had, but lots were updated years ago.

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Dieseltech

11-20-2023 09:20:38




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to Dieseltech, 11-20-2023 09:16:19  
Timing correction, the EARLY 3010 is 10 degrees, the 4010 4AF/11AF pumps 14 degrees.



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VicS

11-20-2023 09:01:50




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 Re: 4010 JD bogging after rebuilt Injector pump installed in reply to mdeisenhauer, 11-20-2023 08:54:54  
You times it at tdc. Think its time about 13 deg. Before.



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