BH65 CONTROL VALVE Parts group BH65 B20000 CONTROL VALVE B21000 CONTROL VALVE [COMPONENT PARTS] B21200 SWING SPOOL SECTION [COMPONENT PARTS] B21300 BOOM SPOOL SECTION [COMPONENT PARTS] B21500 STABILIZER SPOOL SECTION [COMPONENT PARTS B21600 DIPPERSTICK SPOOL SECTION [COMPONENT PART B21700 BUCKET SPOOL SECTION [COMPONENT PARTS] sale parts diagram catalog online construction equipment excavator tractor