Per our conversation, service/repairs were under $500.00, tax/shipping pushed the final price to $515.10. HD 1591 137151 (X2) WITH SPRINGS 280-21 Cleaned (standard - included). Performed service. Seal heads rebuilt, or replaced as needed. Shims inspected and replaced as needed. Shaft inspected/polished, or replaced as needed. Replaced functional seals. Refilled with fresh oil. Set nitrogen pressure to spec. R16 clicks out. TIWI