3539 & 3540 IMDC: TC reported both cab w ~~~~~ 3539 & 3540 IMDC: TC reported both cab wiper washer tank no water.(TP)  3539 water leaking from wiper tank sight glass. Wiper tank isolated. #3540 water tank leak. OPS 20 raised to follow-up when spares are available.  Irwan Masop 45013 To changeout 3539 wiper water tank sight glass & 3540 water tank.  3539 replaced wiper tank sight glass. Function check - OK. No leak was detected. #3540 replaced damaged water tank sight glass 'O'-ring. Function test - OK. No leak was detected.  Sarma/Sugu/Anand/Lee PT/Shafie 45013