The vane pump can't suck oil and the pressure can't get up, how to solve it?

1. Causes

(1) The amount of oil is not enough, the oil level is too low, or the oil suction pipe is blocked by sundries;

(2) The click speed is too low (less than 500r/min), or the steering is reversed;

(3) The oil viscosity is too high, and the oil absorption resistance increases;

(4) The matching gap between the blade and the rotor slot is too small, making it inflexible for the blade to move in the slot;

(5) The oil distribution plate is in poor contact with the shell, so that the high and low pressure oils communicate with each other;

(6) The pump body has casting defects such as sand grains and shrinkage cavities, so that high and low pressure oil can communicate with each other;

2. The solution

(1) Check the oil level, add enough oil, and eliminate impurities and dirt in the oil suction pipeline;

(2) Check the rotation direction and speed of the click or replace the motor;

(3) Use No. 20 mechanical oil or special hydraulic oil with appropriate viscosity;

(4) Re-grind the blades to maintain a proper fit clearance;

(5) Regrind the two contact planes of the oil distribution plate, and the parallelism should be kept within 0.005mm;

(6) Replace the pump body with a new one.