John Deere AT199930 Seal Kit Assembly

The John Deere AT199930 seal kit is engineered for hydraulic pump and main valve sealing restoration on PowerTech 4045 series diesel engines. The kit comprises precision-molded elastomeric seals, O-rings, and backup rings designed to withstand high-pressure hydraulic fluid environments and extreme temperature cycles. It serves as a direct replacement for OEM part numbers AT199930, AT199931, AT170052, and AT170053. Primary applications include John Deere 310E, 310K, 310SK, 315SE, 325K backhoe loaders and 210L, 435 wheel loaders equipped with 4045 power units. The assembly ensures leak-free operation and maintains system pressure integrity under heavy-duty construction and agricultural workloads.