Patent ID: 8893841

Claim:
A work vehicle comprising: a vehicle engine configured to propel the vehicle; a vehicle cooling system having a vehicle engine cooling section configured to cool the vehicle engine and an auxiliary section configured to heat or cool the vehicle, the vehicle engine cooling section and the auxiliary section each comprising an inlet port and an outlet port, the auxiliary section inlet port fluidly coupled to the vehicle engine cooling section outlet port and the auxiliary section outlet port fluidly coupled to the vehicle engine cooling section inlet port, wherein the auxiliary section comprises a check valve fluidly coupled between the auxiliary section inlet port and the auxiliary section outlet port, the check valve being configured to enable fluid to flow through the auxiliary section from the auxiliary section inlet port to the auxiliary section outlet port, and to inhibit fluid from flowing through the auxiliary section from the auxiliary section outlet port to the auxiliary section inlet port; a service pack supported on the vehicle and including a service pack engine operable independently of operation of the vehicle engine, the service pack including a service pack cooling system having a service pack engine cooling section with an inlet port and an outlet port, the service pack cooling system configured to cool the service pack engine; and a cooling system interface comprising a first interface fluidly coupling the service pack engine cooling section outlet port to the vehicle engine cooling section inlet port to allow fluid to flow from the service pack cooling system to the vehicle cooling system and the cooling system interface comprising a second interface fluidly coupling a first portion of the auxiliary section to the service pack engine cooling section inlet port to enable fluid to flow from the vehicle cooling system to the service pack cooling system, the first portion of the auxiliary section comprising a conduit coupling the auxiliary section inlet port to the check valve; wherein the second interface comprises a regulating device configured to regulate the pressure of fluid flowing from the vehicle cooling system to the service pack cooling system and to permit the vehicle cooling system and the service pack cooling system to operate at different pressures, and wherein the second interface comprises a first conduit coupled between the first portion of the auxiliary section and an inlet of the regulating device, and a second conduit coupled between an outlet of the regulating device and a service pack cooling system inlet port, wherein the first conduit and the second conduit operate at different pressures.