Lubricating Louet pulleys

I am assisting a friend with a Louet Octado mechanicel dobby loom. The loom has 8 shafts, but has only had 4 shafts operating for 8 to 10 years. Now shafts 5 to 8 have been put into service and two of these shafts are failing to return completely after being used. There are no obstructions and the problem appears to be that the pulleys are not moving freely when not being pulled directly. They are placed so close together on the axle that I cannot see whether the pulleys rotate on this axle, or if they perhaps have bearings that need lubrication. Help, please.