HELPED ANOTHER EE SET AND SECURE JIB ON BOOM. ILL FITTING SIDE MOUNT BRACKET FOR JIB. OTHER EE SAID PULLING HINGE PINS WOULD LOOSEN IT UP ENOUGHTO PULL JIB INTO MOUNT BRACKET, THEN WE LOOSENED MOUNT BRACKET SPACER BOLT, PULLED MOUNT BRACKET RETAINING PIN TO GET PLAY SPACER, SHOOK THE JIB MANUALLY AND THEN IT FELL. I RODE IT DOWN.