An oil filling device includes an oil filling funnel, {HEAD ~ an extendable tube assembly}, {TAIL ~ a direction adjustment assembly}, and a coupling assembly 
An oil filling device includes an oil filling funnel , { HEAD ~ an extendable tube assembly } , { TAIL ~ a direction adjustment assembly } , and a coupling assembly
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH