Vacuum Transmitting Valve (VTV)
Air should be restricted and flow with difficulty when blowing from side "A" to "B" (as marked on valve). See Figure. Air should flow easily when blowing from side "B" to "A". Replace VTV if a problem is found.
Air should be restricted and flow with difficulty when blowing from side "A" to "B" (as marked on valve). See Figure. Air should flow easily when blowing from side "B" to "A". Replace VTV if a problem is found.