Low compressor capacity or inability to pull down system

Broken connecting rods or pistons - Replace connecting rods and pistons

Blown valve plate or cylinder head gasket - Replace compressor

Leaky valve plates or worm valve seats - Replace valve plate or gasket

Leaky or broken suction valves - Replace valve plate assembly

.Pressure is low between suction and interstage. - Check for problems in low stage heads

Pressure is low between interstage and discharge -Check for problems in high stage..