Steve, here is a list of all the filter numbers for the TC40D and 45D. The original numbers are in black with superceding numbers in blue. Note that the engine oil filter is the same number you got. Also, the HST filter and hydraulic filter are grey in color and don't have any number on them. The engine oil filter is white with the correct number stamped on the case.
TC40/45 Boomer Filters (HST)
HST filter --SBA340500770 <font color="blue"> SBA340500890 </font>
Hyd filter --SBA340500850 <font color="blue"> SBA340500920 </font>
Fuel filter (kit) --SBA360700071 <font color="blue"> SBA360720020 </font>
Air (outer) --86549700 <font color="blue"> 87300778 </font>
Air (inner) --86549701
Eng Oil --SBA86546618
Hope this helps. /forums/images/graemlins/smile.gif