Testing (On Vehicle): Regulator
NOTE:
The test is performed only with a known good compressor.
- Deflate system through service valve and disconnect line at pressure regulator valve. Install test gauge on regulator valve high pressure line fitting. Inflate system through service valve to maximum available pressure.
- If pressure is less than 140 psi, start engine to assist in pressure build-up. Test gauge should register a steady pressure between 100-130 psi. Check regulated pressure by momentarily depressing valve core on test gauge. Observe gauge reading. If pressure is now below 100 psi or in excess of 130 psi, replace regulator assembly.