Cryostat service manual

Select "Equipment," and then "Categories," "C," and then on the third page, select "Cryostats." The HM520/525 is the first one (it might say "Microm" or "Thermo," or "Richard-Allan" - all the same instrument).
I don't know if there is a service manual there. What is the problem you are having? Ask the question in that forum, please

Thanks Ross.  Doesn't seem to be a service manual in there.  No problem as such, just looking at doing a PM service and wanted to make sure I checked all the boxes and if there were any passwords or service counters to be reset.  I'm familiar with Leica models and Microm microtomes but not these.