V-5, V-7, Sanden and 7SEU Style Oil Level Check
In V-5, V-7, Sanden and 7SEU style compressors, the oil cannot be checked where the manifold lines attach to the compressor. In order to properly check the oil for the gpd replacement V-5, V-7, Sanden, 7SEU compressors, you must remove the oil fill bolt located on the compressor housing. The bolt is shown here in the photo below:
The proper amount of oil for the compressor can be found on the side of the compressor. Please note that attempting to check the oil level from the manifold connection will not result in a correct measurement. The only way to properly check the oil is to drain the compressor completely through the oil fill bolt as shown above.