Insufficient pressure pump overhaul

No oil pump overhaul, if they are dirt clogged oil filter, oil filter should be washable. The case of the oil used for too long, because the sediment adhering to the inlet valve on the The resulting valve does not close together, should be replaced with a new release of oil or old  oil expeller  and clean the inlet valve. If an insufficient amount of oil in the tank, add enough oil to the tank can be,If the vacuum pump in the minors, you can pull out the small piston, and then injected into the oil pressure.
Inadequate maintenance of pump pressure, if there is dirt or poor sealing valve, be washable after grinding, so close together. If an inlet valve plug and oil press Seat poor contact can also be washable after grinding, so close together. If an oil press oil out of the valve plug and seat causing poor contact or tighten oil spills, Progress can grind oil press  oil equipment  plug and seat, so close together or tighten the plug. The case of the small piston and pump wear after the gap is too large, should be replaced with new pumps.