1. Too much noise while the equipment is operating.
- Check for loose flywheel, clamps, belt, cooler, belt guard, pulley or other accessories then just tighten all the loose ends.
- The oil in the crankcase is not enough. Check the bearings if there are any damages and add more oil.
- If the mounting of the compressor floor is loose then just tighten the compressor’s bolt and replace the vibration pads for better results.
- The valve plate and the piston are coming in contact. Remove the head of the compressor cylinder and check for foreign objects above the piston. Before putting back the head, add a gasket.
- The crankcase is damaged. It could be replaced or repaired.
- The crank end plays too much. Proper adjustment and shimming is needed.
2. In case the compressor will not function.
- There might be no electrical power. Just turn the power on and then reset by pushing the reset button.
- Check if there is enough oil. If needed, replace the oil.
- Check of the cut-in pressure of the tank, if it is below then the pressure switch needs to be replaced with another with cut-in in a lower PSI level.
3. If the knock has similar cycle as the RPM.
- Check the rod bearings used as connection and replace the rod.
- Inspect the main bearings and then replace.
- If the flywheel is loose, tighten it.
4. If the problem is the occurrence of knock during the compressor’s loading time then try these.
- Check the rod bearings used as connection and replace the rod.
- Inspect the wrist pin and the bearings before replacing the assembly of the piston.
- The rod nut that is used for connection might be loose, just tighten.
5. In case your compressor is consuming too much oil.
- The air that is injected inside must be restricted then the filter must be cleaned or replaced.
- If the oil is leaking, you need to tighten the bolts or the gasket needs replacing.
- The piston rings are worn out then it must be replaced with new ones.
- If the viscosity of oil used is the wrong kind then drain the oil content and replace with oil that has the proper viscosity required by the unit.
- If there is too much tilting in the compressor then it must be level. Vibration pads could also be used as an aid.
- If the cylinder is scored then it needs a new one.