Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any 'hickups' (be sure to completely shut down the air compressor!). Check the isolation of the motor windings.
[pdf] Ingersoll Rand, Atlas Copco, Kaeser, CP (Chicago Pneumatic), and Sullair are globally recognized brands that have earned their reputation over years of reliable service. These companies offer top-quality screw air compressors that are optimized for energy efficiency, longevity, and performance.
[pdf] Technical Specifications — Oil Filter OL00962 Parameter Detail Part Number (PN) OL00962 Brand Jaguar Type Spin-on Oil Filter Application Jaguar Screw Air Compressors (e.g., EAS-22A, EAS-30A, 22–37 kW) Outer Diameter (OD) 93 mm Thread Size M26 × 1.5 Height 212 mm Filtration Precision 10–15 µm Filtration Efficiency ≥ 99.8% Service Life Approximately 2,000–3,000 hours Material.
[pdf] 
