Parts catalog Lumbar Komatsu: 423-57-H0S37 Lumbar Support Kit Komatsu 42N-56-17780 LUMBAR KIT Komatsu 58E-57-00040 LUMBAR ASSEMBLY Komatsu 58E-57-10040 LUMBAR ASSEMBLY Komatsu AS159546 Lumbar Support Kit Komatsu AS203548 Lumbar Kit Komatsu AS203549 Lumbar Kit Komatsu BF4840 LUMBAR SUPPORT KIT Komatsu GJ1134012 Lumbar Kit Komatsu GJ1285346 Lumbar Kit Komatsu XA0145 LUMBAR SUPPORT KIT Komatsu XA2037 LUMBAR SUPPORT Komatsu XA5509 LUMBAR ASSEMBLY Komatsu XA5526 LUMBAR ASSEMBLY Komatsu :