Subaru Robin PKX201 - Manual (Page 64)

Semi Trash Pumps - PKX Service
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14. Remove the shim(s) from the crankshaft. Count the
number that is used and replace with the same
amount. Should the impeller or volute be replaced
as new parts, it will become necessary to re-shim
according to the re-shimming guide located in the
service manual.
13. The seal has two sides. Make sure that you do not
install this side towards the stationary seal in the
back plate. The colored bars must face the impeller.
15. Placing some liquid (water and liquid detergent) on
the crankshaft. This will create slippery surfaces to
help in removal.
16. Using two screwdrivers pry the seal outward evenly.
Should this prove to not work it will become
necessary to remove the backing plate and push out
from the backside. See step 22 for explanation.