Part Number: 135W1246U1 (Seal) Part Number: 135W1246U2 (No description) Part Number: 135W1301-1 (Hinge, arm assy , lift drive, lr) Part Number: 135W1301-2 (Arm assy-hinge) Part Number: 135W1311-1 (Bushing) Part Number: 135W1316-1 (Bushing, clamp, up lift pdu, la) Part Number: 135W1321-1 (Tube ay) Part Number: 135W1321-2 (Tube ay) Part Number: 135W1321-3 (Tube assy-torque used on: 135w13) Part Number: 135W1321-4 (Tube assytorque used on 135w1310) Part Number: 135W1334-1 (Retainer) Part Number: 135W1336-1 (Spacer-clamp up) Part Number: 135W1340-1 (Arm assy) Part Number: 135W1340-2 (Arm assy)