2013 Bobcat T870 goes into limp mode with multiple attached

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RickII

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Joined
Jun 20, 2020
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3
1. Bogs down and almost dies whenever you start the mulcher high flow hydraulics, and we always start mulcher at low engine RPM then slowly raise to full RPM.
2. Whenever you raise the arms up with the mulcher on full speed, the eng RPM increases. Whenever you lower the arms with the mulcher full speed, the eng RPM goes down.
3. According to a guy who works for me from time to time there was a large uplift pump that would pull fuel out of the tank into the filter, was strapped to the fuel filter when we got it, wasn't original. He removed and replaced with Bobcat OEM uplift pump, which is much smaller and mounted to chassis. He thought it was something the previous owner just threw on there to get by with, thinking maybe the original pump broke or something. But could it have been because it needed more fuel flow?
Could all the above point to a fuel starvation problem to the injector pump that may be causing the code issues when mulcher is attached?
 

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