Tanker blade failure

submersible fuel pump failure; if vane pump relief valve is not closed. Due to a foreign body (broken shrapnel, etc.) between the relief valve stuck in the valve and valve seat, causing the fluid inside the loop always do and can not flow in the diesel pump manufacturers, repairs should remove the spool valve to clear foreign body; if Because the pump with the rotor blades and the shrapnel long do high-speed operation, due to fatigue and wear, fracture, resulting in vane pump discharge increases, even when serious loss of pumping action, the pump should be cleared of debris and repair damaged leaves, shrapnel, re-installed after replacing the new; and vane pump and gas separator combined with the surface of the pump pad breakdown or anti-loaded, can also cause vane pump high-pressure chamber communicates with the low pressure chamber, resulting in the loss of the oil discharge vane pump function; if vane pump loose rotor and the rotor shaft, causing the shaft idle, then repair or replace the rotor blades need to pump.