First, I’m no motor head but trying to learn: I’m posting an attachment to see if I can get validation the overhaul manual, for a Case Skid Steer engine 688, is the same 688 engine as my 1988 R4TL? I’m in the US and R4s was never sold here and getting information on parts, and especially parts, very difficult. A company in Houston carries engine parts outlined in this manual. Would I be safe ordering parts for my engine from this company?