Manitowoc ice machine issues with making ice.

[Alex T]

Looking at a Manitowoc ECS041AG that is not making ice, possibly could have had gas issue in the past. I have replaced the drier and capillary tube(same length and ID) vacced and weighed in the correct gas charge of 134a as stated on nameplate. suction pressure on startup is about 30psi and towards the end of the cycle around 20psi cycle time is about 12 minutes SST seems a bit high to me? by the end of cycle very little ice has been made just shells 1mm thick. no access for head pressure reading. looking for some advice as i haven't done much work on ice machines, Cheers.