The overflow pressure pneumatic valve system completely and will not come up

the overflow pressure pneumatic valve system completely and will not come up the reason is mainly manifested in the following points, big oil pump motor to analyze:
:
(1) the main aerodynamic damping valve core hole blocking, such as assembly of main pneumatic valve core is not clean, oil had dirty or assembled with sundry;
(2) the poor quality of assembly, assembly precision is poor, when it is assembled between the pneumatic valve clearance adjustment is not good, the main pneumatic valve core is stuck in the open position, assembly quality is poor;
(3) the main pneumatic valve core is reset spring break or bend, which main pneumatic valve core cannot be reset.
the solution:
(1) open the new pneumatic valve damping hole cleaning and assembly;
(2) filter or replace the oil;
3. Tighten the pneumatic valve cover fastening screw to replace the broken spring.
the reason: the forerunner pneumatic valve failure.
(1) reset spring break or not loaded,
2) cone pneumatic valve or ball not installed,
(3) pneumatic valve cone fracture.
the solution: replace the damaged parts or repair parts, the forerunner of pneumatic valve returned to normal work.
the reason: remote control solenoid pneumatic valve without electricity, Normally open type or pneumatic valve jammed.
the solution: check the power supply circuit, check whether the plug in; Such as normal, may be slippery pneumatic valve jammed, should repair or replace the failure parts.
reasons: hydraulic pump failure.
1. Hydraulic pump join key fall off or rolling;
2. Ask gap between sliding surfaces too;
3. Vane pump vane in the rotor slot card;
4 blades and rotor; way
(5) leaf spring because of the high frequency cycle load, fatigue deformation or broken.
the solution:
(1) change or new join key, and replacement key way;
(2) fitting clearance between the sliding surfaces;
3. Remove the cleaning vane pump;
(4) to correct the wrong direction;
5. Replace the broken spring.
the reason: in and out of the oil outlet upside.
the solution: come here.