STV32 3-POINT LINKAGE/DRAWBAR/HITCH Parts group STV32 K12001 TOP LINK [EXCEPT [G]] K12002 TOP LINK [G] K13000 LOWER LINK K15000 LIFT ROD L12000 DRAWBAR [EXCEPT [G]] L14000 FRONT HITCH L16000 PTO SHAFT PROTECTOR sale parts diagram catalog online construction equipment excavator tractor