FO IGNORES FUELER'S ADVICE WHICH RESULTS IN A FUEL SPILL ON THE RAMP.

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THE CAPT ADVISED AND DIRECTED ME TO ORDER 'FULL FUEL' FOR OUR ACFT. HE FURTHER STATED THAT 1750 LBS PER SIDE WOULD BE SUFFICIENT. I ORDERED FUEL FROM THE FUELER; AND SPECIFIED FULL FUEL. THE CAPACITY OF THE TANKS WAS 3800 LBS. WHILE THE FUELER WAS FILLING THE TANKS HE ADVISED ME THAT TO HIS KNOWLEDGE THE ACFT COULD ONLY TAKE 1750 LBS PER SIDE BEFORE IT OVERFLOWED OUT THE FUEL DUMP VALVE. I TOLD HIM TO CONTINUE TO 1800 LBS PER SIDE AFTER STOPPING AT AROUND 1700 LBS A SIDE. HE CONTINUED; AND APPROX 3 GALLONS OF FUEL SPILLED OUT THE DUMP VALVE. AT THE FIRST SIGN OF FUEL COMING OUT OF THE DUMP VALVE; I TOLD HIM TO STOP. THE FUEL WAS IN A PUDDLE ON THE R SIDE OF THE ACFT. THE FLT TO BE FLOWN WAS A DEADHEAD WITH NO PAX. WE STARTED THE L ENG; AND TAXIED ON 1 ENG UNTIL WELL CLR OF THE RAMP; AND THEN STARTED THE R ENG. THE FLT TERMINATED WITHOUT INCIDENT. THERE WAS NO ACTION TO MY KNOWLEDGE TAKEN. THE CREW; INCLUDING MYSELF; WERE TIRED AND I DID NOT REALIZE THAT THE FUEL WOULD OVERFLOW AT THAT SETTING. THE FUEL WAS PUMPED AT 45 PSI AND IT SHOULD HAVE BEEN LOWERED TO 5-10 PSI AFTER REACHING 1700 LBS PER SIDE. THIS PARTICULAR FUEL TRUCK DID NOT HAVE ANY SETTING OTHER THAN 45 PSI. THE FUELER WAS MAD AND SAID HE WAS GOING TO FILE AN INCIDENT RPT. THIS WAS ONLY LEARNED BY MYSELF LATER IN THE DAY AFTER TALKING TO ONE OF THE OTHER PLTS WHO REMAINED AFTER OUR PLANE DISEMBARKED.