Vane pump common troubleshooting - pump noise is too large 1. Suction port or filter part of the blockage 2. Suction joints are not tight, there is air into the 3. Suction port height is too large, low fuel tank 4. Pumps and associated Axis is not coaxial or loose 5. Loose screws 6. Hydraulic oil viscosity is too large, suction port through the flow of small filter capacity 7. Stator inner surface of the hair 8. Stator sucking the inner surface of the wear 9. Individual leaves are not flexible Or install the anti 1. Remove the dirt, so that the suction pipe unobstructed 2. Strengthen the seal, tighten the connector 3. Lower the height of the suction port, to the fuel tank 4. Re-install, so that the coaxial, tighten the connector 5. Appropriate tightening 6. Replace the viscosity of the hydraulic oil, replace the flow capacity of the larger filter 7. Polished stator inner surface 8. The stator into the flip 9. Check one by one, reloading, inflexible blade reassembly