#3551,AUTO COUPLER AIR LEAKAGE ~~~~~ #3551,Electrical coupler B side Air le     Found the above mention fault due to leakage from piston. Checked by Siani/Koh/Din/Haslan. 12/07/20 Not: 2178718 raise to RSW for assistance. Replace A & B electrical coupler shaft seal set.Function check coupler ok and clean electrical pin. Done by Zulq/Din/Haslan/RSW staff. 13/07/20