I'm looking at a used 1979 1845. Not very familiar with this brand. Anybody know how the parking brake system on this machine works. The current owner said it has never worked. Is this the pin style found on some of them or is this a hydraulic system or ? ? Any other particulars to check out? Overall machine looks pretty good, diesel, hand control(appears to need some adjusting, wants to creep), 2220 hrs, good paint. Mostly just curious as to what expense I might be looking at to get the parking brake in operation. Any insight will be appreciated. Frank