1) failure to attend to this in a timely manner can wreck a whole lot more than the PTO itself. If done in time, there is an extra case installed between PTO & hydraulic pump and some tranny fluid hydraulic lines installed to lubricate the PTO. If not in time, you lose power steering and radiator fan cooling for the engine/tranny. Worst case I've heard of monitoring the CC Yahoo group is ~$30,000 total wreckage. Its an easy check. You can look for the red
mid-case between the red Chelsea PTO
and the hydraulic pump(s). The brass fittin below is part of the hydraulic line feed to/from the "Wet" PTO assembly's middle case. If you have that & the 1/4" hydraulic lines you are good to go.
2) There are multiple PTO setups CC used. Some rigs had two PTO's, one on each side of the tranny to power separate pumps, usually one for steering and one for radiator fan motor. Some used a double pump off a single PTO. My rig has the double pump (tho not a CC rig). Just takes a quick inspection on a creeper to see what you've got in each CC case.
3) If you need the PTO wet kit, the PTO model# & serial#off the name plate and a photo like the above are useful (#'s are needed). The link to JD above is a good one, another source for parts that sold a lot of wet kits is Berendsen Fluid Power's Sacramento office, 916-372-0550. The PTO manuals are all available online. The one for the 267 model of PTO on my rig (fairly common) is here
and here is the Parts List link
; if you print it you can omit all the non-Allison installation pages as they are no use to motorhomers.