#1. Open hood.
#2. Disconnect and remove battery.
#3. Remove weather seal from false bulk head = blue line in attached picture #A.
#4. Remove four access panel screws = red dots in attached picture #A.
#5. Remove access panel = pink line in attached picture #A.
#6. Remove the silver processor box from bracket and lay it back on the bezel.
#7. Remove the three hoses where they pass through bulk head.
#8. Trace the aux pump wire to the plug and disconnect it.
#9. Remove the wire from mono valve.
#10. Remove two 10mm bolts holding mono valve, you may need pliers to hold the bottom nut unit.
#11. Remove the upper hose from the mono valve.
#12. Remove the water feed hose going through false bulk head to aux pump.
#13. Remove the two 8mm bolts supporting the aux pump isolation bracket.
#14. Remove the pump and mono valve assembly as a unit, use great care.
#15. Note orientation of aux pump to mono valve.
#16. Remove aux pump from mono valve.
#17. Remove aux pump isolation bracket from old unit and install on new unit.
#18. Install new aux pump to mono valve with correct orientation.
Reverse order # 14. - #1. and you are done.

Mine was nasty; it took two hours in the shop with all correct tools.
I hope yours is easy.
Have a great day.

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