Cold weather got me - where to find manuals?

I recently acquired a D5C (9DL00614) for work around the ranch and failed to verify the antifreeze protection level before winter. After returning from a few weeks away from home, I began to check things out and found the radiator very low. When refilling the coolant, it seemed to be taking a lot of fluid and then I noticed coolant coming through the crankcase vent. Doesn't sound good at all.... I anticipate this being some expensive 'experience'. :Banghead

So - before I begin opening the engine up (3046 - 5xk02075 arr 6I3537) I would like to find parts and service manuals for this machine and would like some input on where to get these books at a reasonable price.

Hope you all have a great 2017!

Cold weather got me - where to find manuals?