Thanks for the quick reply Chuck! Your "Curtis" tip was just what I needed!
My dealer only has an X720 on-display. I wonder if I can see this oil filter you are talking about on the X720 there? I will stop by tomorrow morning and take a look. I recall seeing one on the tractor before. It did not seem to be in a bad place like the 2305 oil filter is. However, if memory serves me well it was sideways. I remember spilling fluid all over the place trying to change a sideways mounted oil filter on my 1999 Ford Ranger!!! Maybe spilled hot oil is an acceptable price to pay for not busting a filter if you run over a stick in the yard??
The rest of this is about the cab... call it payback for the help you all have given me so far! (THANKS).
Based on what you said I looked up Curtis and called them at 800-343-7676. Their technical support representative was extremely helpful! I am not going to give him credit by name because I did not ask his permission to post what he said on the Internet. If you don't believe me call him yourself...
He confirmed his company makes the cab John Deere sells for the X749. John Deere sells the X749 cab direct. A 2305 cab is available from Curtis.
He also confirmed the hard cab they sell for the X749 is a certified ROPS for the X749. It doesn't offer a "rollbar ROPS" like the 2000 series, but the structure itself will protect the operator in a rollover situation just the same with or without windows installed.
The doors can be completely removed rather easily. The front and rear glass tilts open at the base and also can be removed, but it is more work than the doors.
The X749 standard 40A alternator is sufficient for all optional accessories which include front lights, heater blower, strobe light and front windshield wiper. The switch/fuse box makes for a cleaner install, but is not required.
Curtis claims the heater is 20,000 BTU. John Deere claims it is 15,000 BTU. I think both are right because it depends on coolant temperature passing through it. I don't think 5,000 BTU makes that much difference.
He recommended against the exterior mirrors because it can be hard to find a place to mount them on the cab. Personally, I do not think they are necessary and would get busted off on a tree or something. I also have not sat in the cab and driven the tractor without them.
-Bill
Saint Louis, Missouri