In the last month I've tried pulling an injection pump from 2 separate 617 engines with no luck. I pulled one off of a 617 engine about a year ago with no problem and another one off of a 616 engine way back when. In the past I've removed the three 13mm nuts at the front of the pump and then slid the pump back and out. Could there have been some type of catastrophic engine failure on the last two engines that I tried which kept the pump from sliding out? The pumps would slide from side to side, but not out.

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'81 300SD