Page 323 - Reciprocating Compressors Operation Maintenance

308 Reciprocating Compressors: Operation and Maintenance

TABLE 5-1
TROUBLESHOOTING CHART

The Problem ^
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The Causes tt
System demand exceeds rating *
Discharge pressure above rating * • • •
Untoader setting incorrect * *
Intake pipe restricted, too small, too long • •
Intake filter clogged . * .
Valves worn or broken * • * • * *
Valves not seated in cylinder * • * •
Valves incorrectly located • * • «
Gaskets leak • • * *
. .
Unloader or control defective * . »
System leakage excessive *
Piston rings worn, stuck, or broken * • * * * •
Cylinder (piston) worn or scored • • • • * *
Belts slipping •

Speed too high * * »
V-belt or other misalignment •
Pulley or flywheel loose •
Motor rotor loose on shaft •
Foundation bolts loose •
.
Foundation uneven — unit rocks
Piston to head clearance too small .
Crankshaft end play too great •
Piston or piston nut loose •
Bearings need adjustment or renewal * *
. *
Liquid carryover *
Oil feed excessive • • • *
Oil level too high • •
Lubrication inadequate • • • * • * *
Oil viscosity incorrect * • •
Intercooler vibrating •