3640 cab duplex gauge MR at zero. brake ~~~~~ 3640 cab duplex gauge MR at zero. brake pressure ok. check Pressure at CG Test point and cab MR test point with digital    pressure gauge, air pressure pres found MR duplex gauge faulty, replace and function test Air compressor cut in 8.7b, cut out 10.3b, CT 1min20s and air leak test 0.3b/5min. S/N: Na Notification:2535467 Done by:Jack/Sani Date:24/10/2023