四柱液压机施压时的故障基本上主要分为两种原因，一是阀的问题，二是压力不顺畅塞泵的问题。
Problems with 1. valves
When the equipment is working, the pressure adjustment pilot valve leaks too much, causing the safety relief valve to be in a normally open state, and the oil pressure cannot rise, which may lead to spring damage, poor sealing in the valve plate, or poor quality, causing the small hole of the safety relief valve to be unobstructed, or blocking the valve core and not acting.
Solution, timely maintenance, replacement of spring, sealing, processing valve impurities, to achieve a series of normal action.
Second, the pressure is not smooth plug pump problem
The pump itself is equipped with serious wear and tear, oil leakage, sliding shoes falling off, etc. These accidents must be repaired by professional personnel. The grinding oil pan should be ground with a flat plate, sealed, and the sliding shoes should be replaced. The hydraulic spring in the pump is damaged, the spring should be replaced, and the small piston should be stuck in grinding.
Professional four-column hydraulic press production and manufacturing personnel, must be professional, judgment ability and professional knowledge and processing techniques to judge accurately, targeted and effective solution.