12/16 Assembly description
Bosch Rexroth AG, SB23, SB33, EHR23, EHR33, RE 66133-10-R/05.2013
Versions with Rx and X ports that have a counterbore for an O-ring and do not
have a continuous bore through the valve housing, must also be provided with an
O-ring. The O-ring to be used depends on the bore diameter.