A worm and gear drive unit 1 wherein one of said walls includes a plate detachably secured thereto providing {TAIL ~ a portion} of {HEAD ~ such wall} and wherein one of the lands on said hub is journalled for rotation in said plate 
A worm and gear drive unit 1 wherein one of said walls includes a plate detachably secured thereto providing { TAIL ~ a portion } of { HEAD ~ such wall } and wherein one of the lands on said hub is journalled for rotation in said plate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH