What was found
FUEL IMBALANCE ON CLIMBOUT, GOT CENTER TANK RT PUMP LOW PRESSURE LIGHT. STARTED GETTING IMBALANCE BETWEEN MAIN TANK 1 & 2. OPENED CROSSFEED & NOTED NR 1 ENGINE BURNING OFF CENTER TANK & NR 2 STILL BURNING OFF NR 2 MAIN TANK FUEL WITH 2000 LB IN CENTER. ONCE CENTER FUEL EMPTY BURN WAS EVEN & FUEL USED FOR BOTH ENGINES WAS EVEN. TOTAL IMBALANCE BETWEEN 1 & 2 ABOUT 600 POUNDS. ACFT GROUNDED. PERFORMED CENTER TANK RIGHT PUMP PRIMING PROCEDURES IAW FIM 28-22, TASK 802. CENTER TANK RT BOOST PUMP, OPS CHECKS NORMAL.