Subaru Robin PKX201 - Manual (Page 49)

Trash Pumps - PKX Service
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28. Replace the correct amount of shim(s). As noted
earlier it will be necessary to replace with the
same amount that was taken off.
25. After the back plate has been tightened, replace the
two bolts that hold the pump housing to the frame.
26 When replacing the mechanical seal. Putting some
liquid detergent on the seal and crankshaft will ease
installation.
27. Push the seal into place. Using two thumbs will also
make it easier. If the pump back plate was removed
it will be easier to install the seal before mounting the
back plate to the engine.