Shop Electrical Supplies Online at Crescent Electric Supply Company. Serving the electrical, construction, commercial, industrial, utility and datacomm…. JACK WILL NOT OPERATE WITH JACK VALVE OPEN AND PUMP VALVE IN PUMP POSITION – Continued Bleed hydraulic system ( para 6-10 ) . 13. JACK LEAKS AROUND CYLINDER…. 4 . lexible hydraulic tube and auger for…