I have a late production MF40 that is difficult to find parts for. The casting numbers on components are 1 number off what shows in the parts manual. (not the revision number) The rear Body casting number is 1869963M1 with RB2 stamped just underneath. This is a 21 spline pump with the Pressure control valve instead of the cartridge style relief. The filter is faced down. I wanted to order a seal kit but cannot determine the correct one.
The other option would be to convert it to the cartridge style by replacing the block and standpipe or brazing closed the unused ports in the original pressure control valve block. Any suggestions would be appreciated.