Shimano disc brake system question

david baker

2009-09-15

I have this type of brake:
http://bike.shimano.com/publish/content/global_cycle/en/us/index/products/mountain/deore_xt/product.-code-BL-M775.-type-.html
On the right lever if I have not used it in, say a couple of minutes, while riding it has resistance to being actuated. Once actuated it works fine as long as you keep using it. I feel like it needs lube somewhere but I can't find any maintenance stuff at the shimano website other than bleeding it.
Does anyone know what to do or can you point me to some directions for maintenance?