A third circumferentially extending groove 76 is formed in {HEAD ~ the inner surface} 60 of {TAIL ~ the sleeve} 14 at a level between the passages 74 and the second groove 68 so as to accommodate a first radial lip seal 78 
A third circumferentially extending groove 76 is formed in { HEAD ~ the inner surface } 60 of { TAIL ~ the sleeve } 14 at a level between the passages 74 and the second groove 68 so as to accommodate a first radial lip seal 78
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH