We have this apparent incongruity:

2) the copy of the service manual i saw said that the pump is to be serviced
every 1000hrs of use.....which if you calculate based on a 12hrs. processing
cycle 5day/wk.....comes to 3-4mo.

This statement is not accurate. Leica Microsystems Service Manual for the
Leica ASP 300 Tissue Processor recommends that the pump be serviced every
48 months. 

This may be resolvable. Could it not be that the 1000 hrs of use means use of the pump, which is of course, used only intermittently during the 12 hours schedule?


Terry L Marshall B.A.(Law), M.B.Ch.B., F.R.C.Path
Consultant Histopathologist
Rotherham General Hospital, Yorkshire
terry.marshall@rgh-tr.trent.nhs.uk