Abnormal noise in the crankcase
Tanabe LSHC-20B/30A/40A, two-stage air-cooled reciprocating air compressor (emergency / service air)
Possible cause
Worn main or rod bearing, loose connecting rod bolt
What to do
Manufacturer's manual, p. 27Replace or adjust bearings, retighten rod bolts to 480 kgf·cm
See the assembly on the 3D model
Other Tanabe LSHC-20B/30A/40A faults
Abnormal noise from the cylinderForeign matter in cylinder, worn cylinder/piston, too thin head gasket, broken valve plate or spring, worn piston pin bushHigh delivery air temperatureLeaking delivery valve, faulty valve seat gasket, carbon on valves, poor coolingHeavy carbon on valvesHigh oil consumption, wrong oil level or poor oilPressure does not risePipe leak, damaged valve or dirt on seat, worn piston ringsOil pressure does not increaseLow oil, worn bearing metal, reverse rotationHigh oil consumptionWorn piston/cylinder or rings, oil above H markExcessive vibrationLoose bolts or flywheel, weak foundationPiston seizureDust entering the cylinderV-belt slippingSeized piston or bearing, belt too slack
From the manufacturer's manual “EM-20-4 INSTRUCTION MANUAL FOR TANABE AIR COMPRESSOR TYPE LSHC”. Check against the original on board before work.