The USDA Agricultural Research Service requires maintenance repair of a 600 kW Caterpillar Model C18 diesel generator at the North Central Agricultural Research Laboratory in Brookings, SD. The work includes replacing air filters, crankcase breather filter, coolant hose/lines heater, wiring harness unit injector, and valve cover base, plus valve adjustments and fan bearing hub reconditioning. This acquisition is a total small business set-aside under NAICS 811310 with a $12.5 million size standard. Quotations are being requested through this combined synopsis/solicitation.