Charging Problems

Sounds like you might have a bit of poop in the fill valve. I would check the probe first and if isn't blocked you will need to disassemble the fill valve. It is fairly basic. Make sure the airtube is totally empty by dry firing, unscrew the valve assembly, disassemble it, clean all the parts and replace any damaged Orings and reassemble.
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View attachment 1525669779_14991256785aefdf9311d687.33789825_Coyote-full-rifle-Rev08.pdfThis schematic may help.