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48 YORK INTERNATIONAL
TABLE 2 – OPERATING ANALYSIS CHART (Continued)
RESULTS POSSIBLE CAUSE REMEDY
6. SYMPTOM: USUALLY HIGH OIL PRESSURE DEVELOPS WHEN OIL PUMP RUNS
Unusually high oil pressure is displayed High oil pressure. Trans- Replace low or high oil pressure
when the oil pressure display key is ducer defective. Relief transducer. Adjust external relief
pressed when the oil pump is running. valve is misadjusted. valve.
7. SYMPTOM: OIL PUMP VIBRATES OR IS NOISY
Oil pump vibrates or is extremely noisy Misalignment of pump or Correct condition or replace faulty
with some oil pressure when pressing
Mounting bolts loose.
part.
OIL PRESSURE display key.
Bent shaft.
Worn pump parts.
NOTE: When oil pump is run without Oil not reaching pump Check oil supply and oil piping.
an oil supply it will vibrate and suction inlet in sufficient
become extremely noisy. quantity.
8. SYMPTOM: OIL PRESSURE GRADUALLY DECREASES (Noted by Observation of Daily Log Sheets)
Oil pressure (noted when pressing OIL Oil filter is dirty. Change oil filter.
PRESSURE display key) drops to 70%
of oil pressure when compressor was Extreme bearing wear. Inspect compressor.
originally started.
9. SYMPTOM: OIL PRESSURE SYSTEM CEASES TO RETURN AN OIL/REFRIGERANT SAMPLE
Oil refrigerant return not functioning. Filter-drier in oil return Replace old filter-drier with new.
system dirty.
Jet or orifice of oil return Remove jet, inspect for dirt. Remove
jet clogged. dirt using solvent and replace.
10. SYMPTOM: OIL PUMP FAILS TO DELIVER OIL PRESSURE
No oil pressure registers when pressing Faulty oil pressure Replace oil pressure transducer.
OIL PRESSURE display key when oil
transducer
pump runs.
Faulty wiring/connectors.
11. SYMPTOM: REDUCED OIL PUMP CAPACITY
Oil pump pumping capacity. Excessive end clearance Inspect and replace worn parts.
pump.
Other worn pump parts.
Partially blocked oil supply Check oil inlet for blockage.
inlet.