A bearing support frame is disposed within {HEAD ~ a rear end portion} of {TAIL ~ a tractor front housing} having an open rear end 
A bearing support frame is disposed within { HEAD ~ a rear end portion } of { TAIL ~ a tractor front housing } having an open rear end
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH