Wikipedia says:
The KC-130J offers a 57,500-pound fuel offload capacity using wing and external tanks while in the air. The KC-130 is equipped with a removable 3,600-gallon aluminum fuel tank that is carried inside the cargo compartment providing additional fuel when required. The aircraft is ready to fuel fixed or rotary-wing aircraft using the standard probe and drogue.
Sorry about the pounds 57,000 lbs is 9,500 gal.