Case 550H Water Pump

I need to replace a water pump on my 2002 Case 550H. Anyone know how difficult this actually is? New to dozer repair but have worked on other equipment on the farm for a long time. Wasn't sure about timing chain and just how much tear down I was in for. It still runs and I can load it if need be but its in a good location to work on if I can replace it in the field. Thoughts ??????

Thanks in advance!!!

Case 550H Water Pump