Cab air-con blowing warm air. ~~~~~ 3603 cab A/c blowing warm air & freon pressure low. Found leakage at evaporator liquid & suction connector. Retightened the loose connection & reconducted leak test - OK. Proceeded to vacuum & charged freon to LP (85 Psi, HP 250 Psi). Cab diffuser temp. 13.2'C. Further monitor for 2 hrs & no abnormalities found.  Kana/Boopathy. 18/07/2020.