Sherwood makes both Major and Minor maintenance/repair kits for many of their pumps. Thes kits have more parts than a simple Impeller Kit and can be generalized as follows: Minor Kits usually include the Seal Assembly, an O-ring or Gasket, and the Impeller. They may also contain additional minor parts such as keys and retaining rings. Major Kits usually contain all of the internal components of the pump, except the shaft (although #18655 and #19354 do include the shaft). For the exact contents of a specific kit, please contact us. The following kits cover too many pumps to fit in the Table, below: Minor Repair Kit #23972 --- P173, P1711, P1712, P1716B, P1719, P1719F, P1722B, P1727FB, P1730F, P1731F Minor Repair Kit #23976 --- G3, G4, G5, G5-1, G7, G7B, G8, G26, G45-1, G45-2, G46, G50, G55-2, G56, G85, H85, K90, L10, L10B, L80, L90, M71 Minor Repair Kit #23979 --- G1, G2, G15, G20, G21, G22, G30-2, G30-2B, G95-1, G9901, G9902, G9903, H10, J70, K75, K75B Major Repair Kit #12252 --- L9930G, M10210G, N10410G, N10510G, P10610G, P10700G, Q10770G, R10955G Major Repair Kit #12665 --- G1, G2, G15, G20, G21, G22, G30-2, G30-2B, G95-1, G9901, G9902, G9903, H10, J70, K75, K75B Major Repair Kits #12794 and #23977 --- G3, G4, G5, G5-1, G7, G7B, G8, G26, G45-1, G45-2, G46, G50, G55-2, G56, G85, H-85, K90, L10, L10B, L80, L90, M71 Major Repair Kit #23974 --- P173 P1711, P1712, P1716B, P1719, P1719F, P1722B, P1727FB, P1730F, P1731F