Hello all, I know that this post has aged a lot, but it helped me, and I just wanted to post this for others who might have the same issue with their Little Giant APCP-1700 - I think I just had some kind of a security screw in hole #5 - mine looked much different than yours - it's hard to tell after I drilled into it - could have just been full of gunk because it looks mostly like a normal phillips head, but I'm guessing that it might have had some kind of standoff in the middle or something. I drilled just into it just enough to be able to thread a drywall screw into it and pull it out. Thanks for posting all of these updates with the pics
@JamesW that helped a lot in fixing my pump.
RESULT: I was able to get the pump going. I didn't have much luck getting it to run at first - upon inspection, the impeller could manually turn freely, the air hole didn't look to be plugged (I blew it out with canned air just to be sure), but when I dropped it in a bucket of water and gave it electricity, the motor just hummed with no action. I rotated it around quite a bit to let all of the little air bubble seep out - still nothing...after jacking with it for a bit and almost giving up, I used my finger to very carefully give the impeller a nudge, and BAM!, it fired up and blew water at me like it was brand new.
! UPDATE (EDIT)
I may still have some work to do - I ran the pump in a bucket of water for a bit to circulate, and when I came back after 20 min or so, there was no activity - I'm guessing the thermal switch (or whatever) may have kicked it off...I manually reset the float a few times, heard it humming again, and I had to help the impeller get started again by turning it a few revolutions with my finger. It's running again for now, but I'll keep troubleshooting it to see what I come up with.
I suppose it could be random... it just fit too perfectly and was wedged in the hole like it was pounded down into it...
Once again... thanks for your help
