Bucket rollback position Bucket rollback position (2) B1 A1 b1 a1 P T Hydraulic circuit 76096WE56 When the pilot pressure is led to the port b1, the bucket spool moved to rollback position. Oil from the pump flows to the cylinder port B1 and oil from the cylinder flows into the tank passage through the cylinder port A1. 6-31 a2 T P a1 A1 B1 LS A2 B2 pst Dump Bucket oll back Floating Down R Up Boo m b1 A2 B2 b2