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