http://www.benscycle.net/index.php?main_page=product_info&products_id=2208&zenid=9c37f34df5f32080bbeabc70046ba6d4 Comes with spare seals.
SJS have a range of Shimano hub spares.. http://www.sjscycles.co.uk/category-Shimano-Hub-Cones-and-Seals-422.htm
Shimano page (so you can find the part # for the seals): http://cycle.shimano-eu.com/catalog/cycle/products/component.jsp?PRODUCT%3C%3Eprd_id=845524441770734&FOLDER%3C%3Efolder_id=2534374302049867&ASSORTMENT%3C%3East_id=1408474395181667&bmUID=1201771348105
You might need to visit the Jap site to get exploded view for 7600 hubs, here is the 7710s: http://cycle.shimano-eu.com/media/techdocs/content/cycle/EV/bikecomponents/HB/EV-HB-7710-R-1729_v1_m56577569830611823.pdf
HTH
@hippy started
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http://www.benscycle.net/index.php?main_page=product_info&products_id=2208&zenid=9c37f34df5f32080bbeabc70046ba6d4
Comes with spare seals.
SJS have a range of Shimano hub spares..
http://www.sjscycles.co.uk/category-Shimano-Hub-Cones-and-Seals-422.htm
Shimano page (so you can find the part # for the seals):
http://cycle.shimano-eu.com/catalog/cycle/products/component.jsp?PRODUCT%3C%3Eprd_id=845524441770734&FOLDER%3C%3Efolder_id=2534374302049867&ASSORTMENT%3C%3East_id=1408474395181667&bmUID=1201771348105
You might need to visit the Jap site to get exploded view for 7600 hubs, here is the 7710s:
http://cycle.shimano-eu.com/media/techdocs/content/cycle/EV/bikecomponents/HB/EV-HB-7710-R-1729_v1_m56577569830611823.pdf
HTH