Parts list: № Number Qty Name Options 1 R81777 1 Wear Ring 2 RE20345 1 Seal 3 R83575 1 O-Ring 4 R81864 1 Back-Up Ring 5 AH212091 1 Hydraulic Cylinder Kit BORE, (SUB FOR RE20429 AND RE31138 OR AH149842) Next page: 3160-20 LOAD CHECK PLUG AND ANTI-CAVITATION CHECK VALVE (BOOM SECTION) (SERIAL NO. -738468) [02K20] 3160-21 VALVE SECTION SEALS AND END PLATES (SERIAL NO. -738468) [02K21] 3160-22 THIRD FUNCTION SECTION (SERIAL NO. -738468) [02K22] 3160-22B THIRD FUNCTION VALVE (MANUAL CONTROL) (SERIAL NO. 738469-768251) [02K23] 3160-22D THIRD FUNCTION VALVE (MANUAL CONTROL) (SERIAL NO. 768252- ) [02L01] 3160-19A REPLACEMENT BOOM SECTION POSITION (SERIAL NO. -738468) [02K19] 3160-19 BOOM SECTION POSITIONER (SERIAL NO. -738468) (SEE REPLACEMENT BOOM SECTION POSITIONER) [02K18] 3160-18B REPLACEMENT BOOM SECTION (WITH OR WITHOUT RETURN-TO-DIG) (SERIAL NO. -738468) [02K16] 3160-18 BOOM SECTION (WITH OR WITHOUT RETURN-TO-DIG) (SERIAL NO. -738468) (SEE REPLACEMENT BOOM SECTION) [02K15] 3160-16 RELIEF VALVES (BUCKET SECTION) (WITH OR WITHOUT RETURN-TO-DIG) (SERIAL NO. -738468) [02K13]