{TAIL ~ The direction adjustment assembly} is mounted to the coupling assembly that is attachable to an oil filling hole of {HEAD ~ an engine} 
{ TAIL ~ The direction adjustment assembly } is mounted to the coupling assembly that is attachable to an oil filling hole of { HEAD ~ an engine }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD