Inspect for a damaged R27564 O-ring on the poppet in the number 1 dump valve. If this does not correct the problem, then disassemble the valve and inspect for debris plugging the seat under the solenoid poppet and the orifice. Check for spool binding.
i had a 9600 do this same thing last year, overheating and reel wouldn't go down. the oring was cut

i had a 9600 do this same thing last year, overheating and reel wouldn't go down. the oring was cut
