WA450-2 Komatsu Wheel Loader

Our company is looking at purchasing some industrial real estate & in the deal is a WA450-2 Komatsu Wheel Loader, Ser # A25499. Can anyone tell me from the Ser # what year the unit is & the bucket capacity for a general purpose bucket. To me it looks like about a 4-yard machine. We are told that the loader has a blown head gasket on it. The machine represents a very small portion of the overall deal but if it all works out we would use it for mat'l handling with forks & snow removal etc..

Thanks, Metalman