GE H301 Series Operating Manual page 125

Situation
Compressor will not rotate
Cylinder noise or knock
Frame noise or knock
Cylinder or frame vibration
Low oil supply pressure
Temperature
Potential common causes
• Cylinders gas pressure loaded
• Piston end clearance improper, piston hitting head-end
head or crank-end head
• Foreign, incompressible material in cylinder
• Mechanical seizure in running gear (crankshaft, bearings,
connecting rod, crosshead, packing/piston rod, piston)
• Piston loose on rod
• Piston end clearance improper, piston hitting head end
head or crank end head
• Loose crosshead balance weight
• Damaged crosshead or excessive clearance
• Loose crosshead pin or pin caps
• Loose packing case or false head
• Broken or leaking valves
• Worn or damaged piston rings
• Valve improperly seated or damaged seat gasket
– Loose VVCP Jam Nut
– Loose or broken VVCP piston
• Loose crosshead pin or pin caps
• Loose or worn main, crank pin or crosshead bearings
• Knock coming from cylinder end
• Damaged crosshead
• Loose crosshead balance weight
– Excess crosshead to guide clearance
– Excessively high crankcase oil level
• Improper lube oil selection
• Discharge bottle wedges loose or improperly adjusted
• Compressor frame to cylinder or crosshead guide
mounting bolts loose
• Bottle/piping acoustical pulsations
• Drive train misalignment
• Excessive crosshead guide clearance (crosshead slap)
• Inadequate support of compressor skid to foundation
• Loose bolts connecting skid to foundation
– Mechanical problems with driver
– Unequal reciprocating balance weight on opposing
throws
• Low oil level
• Oil pump failure
• Oil pulsations from excessively cold oil
• Oil pressure regulating valve improperly adjusted
• Oil filter element – dirty, restricted, or collapsed
• Defective pressure gauge
• Oil foaming - high oil level being struck by counterweights
• Internal running gear leakage - excessive bearing
clearance
• Mechanical defects in compressor frame
• Temperature control valve temperature incorrect
• Improperly installed or stuck
H301/302 HSR Compressors | Rev. 2.2 | 115