fuel dispenser blade failure

Vane pump failure; if the vane pump relief valve can not be closed. Due to a foreign body (broken shrapnel, etc.) stuck in between the relief valve spool and valve seat, causing the oil inside the loop always do and can not flow in the pump, repairs should remove the valve, remove the foreign body seat; if Because the pump with the rotor blades and the shrapnel long do high-speed operation, will wear due to fatigue, fracture, leading to vent vane pump increases, even when serious loss of pumping action, the hand gasoline pump should be clear debris and repair damaged leaves, shrapnel, re-install the new replacement; and vane pump and oil separator pad bonding surface of pump breakdown or anti-loaded, can also cause the vane pump high-pressure chamber communicates with the low pressure chamber, resulting in the loss of the fuel transfer hand pump drain; if vane pump loose rotor and the rotor shaft, causing the shaft idle, this time in need of replacement repair rotor or vane pump.