a bearing seal for sealing {HEAD ~ the bearing assembly} from {TAIL ~ an exterior side} of the wheel half, and 
from
a bearing seal for sealing { HEAD ~ the bearing assembly } from { TAIL ~ an exterior side } of the wheel half , and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH