What was found
AFTER ENGINE START AT THE GATE, NUMBER 2 ENG HYDRAULIC PRESS LOW ILLUMINATED, AND STAYED ILLUMINATED. GROUNDED - YES. CHECKED PUMP DEPRESSURIZING C/B FOUND IN, CHECKED CANNON PLUG ON PUMP OR DRY MOTORED NR 2 ENG. VERIFIED NO PRESSURE AND LOW PRESS LT STAYED ON FOR ENG 2 PUMP. ALSO NOTICED PUMP VERY HOT TO THE TOUCH. REMOVED & REPLACED NR 1 EDP REF B737-800 AMM 29-11-11/401, CASE DRAIN FILTER CHECK VALVE REF CFM56-7 PBM 71-00-02 FIG 21-1, CASE DRAIN FILTER UNION REF PBM 71-00-02 FIG 20-2, QUICK DISCONNECT CASE DRAIN HOSE REF PBM 71-00-02 FIG 21-1. OP CHECKS GOOD. NO LEAKS FOUND.