Oil pressure does not rise
Tanabe VLHH-64A / 74A, v-type air-cooled 3-stage reciprocating compressor
Possible cause
Reverse rotation, clogged oil filter or screen, low oil, air in oil, worn bearings
What to do
Manufacturer's manual, p. 32Correct rotation, clean filter/screen, top up, bleed air, replace bearings
See the assembly on the 3D model
Other Tanabe VLHH-64A / 74A faults
Abnormal sound around the cylinderForeign matter, worn cylinder or rings, bad head gasket, damaged valveAbnormal sound in the crankcaseWorn bearings, pin bushing or rod metal, loose rod boltHigh delivery air temperatureLeaking delivery valve or seat gasket, carbon on valves, poor coolingHeavy carbon on valvesExcess oil, wrong or old oilPressure does not risePipe leaks, damaged valves, worn rings, blocked suction filter, unloader faultHigh oil consumptionWorn rings, piston or cylinder, too much oilExcessive vibrationMisalignment, loose bolts, worn bearingsBelt slipsBelt tension too lowOverheatingFan belt loose, clogged coolerEmulsified lubricating oilHumid room, drain not purged often enough
From the manufacturer's manual “EM-20-5 INSTRUCTION MANUAL FOR TANABE AIR COMPRESSOR TYPE VLHH”. Check against the original on board before work.