Because these parts move every time the compressor "loads" or "unloads," they are subject to high-cycle fatigue and wear. Common issues include:
The , conversely, is a study in fatigue resistance. A compressor cycles thousands of times a day. If the spring is too stiff, it creates excessive wear on the guide; if it is too soft, it fails to retract the pin quickly enough. In ammonia service, springs are susceptible to stress corrosion cracking. A snapped spring coil can travel downstream, lodging in a port and rendering the unloader useless. mycom compressor lift pin and spring
This is the "return" mechanism. Once hydraulic oil pressure is released from the unloader cylinder, the spring pushes the lift pin back down, allowing the suction valve to close and the cylinder to resume normal compression. Why They Fail: Common Symptoms Because these parts move every time the compressor
To ensure optimal performance and extend the lifespan of the Mycom compressor lift pin and spring: If the spring is too stiff, it creates
Acting as a mechanical plunger, the lift pin is pushed upward by the unloader piston. When engaged, it physically lifts the suction valve plate off its seat.
⚠️ Failure of a lift pin or spring can lead to slide valve jamming, which may cause severe internal damage to the compressor rotor housing. Replace at every major overhaul or if any wear is detected.