There's not much to it, really. All you have to do is drain out the old and refill it with new. If you have been keeping up with your other maintainence that's about it. If you haven't then I suggest you give the projector a good going-over.... Otherwise all you should have to do is give it an extra-good cleaneing, check the belts and replace them if you have to. Give it a "function check" and you're done.
If you want to you can take the back off and clean out the oil sump and strainer by hand. If you've been keeping up on maintanence that's not too critical.
Funny... as easy as it is to do this stuff, it's the least kept up part of the projector in a lot of booths. Hell, I'm lucky to even find oil in HALF the projectors I look at!

My suggestion is to simply save it up in a 4-5 gallon container. (That's a lotta Simplex oil changes. I don't know how many, but a guess would be about 40.) When the container gets full, then take it to a local gas station, etc. and have them dispose of it properly. In my town, the local fire dept. will set up a collection once a month where you can drop it off to them. Maybe there's something like that in your town.
Mark the container, so no one thinks it's "good" oil, and uses it again.
A guy I know used to dump his old car oil into his oil tank for the furnace. He would pour in a quart, wait a few days, pour in another, etc. He said that it would clog the nozzle if 5 quarts tried to go through at once, but with only a quart every few days, it was OK.
As someone who changes the oil on his vehicles every 2-3000 miles, I dont understand why the projector oil cant be changed with some regularity. I'm a stickler for correct oil levels in everything that I own.
(The Holmes uses a grease pack, and is checked far more often than the manual suggests)
My big RCA TP-66 Telecine projector is the only one that I own that needs an oil change now and then. The oil is absolutely level with the mark on the sight-glass before I begin using it. I learned this after the TV station bought a new "66" in 1980, their first, and never checked the oil levels after the tech set it up at the delivery time. They had to replace the intermittent suddenly less than 6 months after the purchase, and I remember the unit costing around 12,000 bucks!
My "66" pair are from the late '60's, had regular maintenance, and are still running perfectly after many thousand hours of running time.
My uncle Bill Broome, got me started doing proper maintenance on my mechanical toys. Oil in the cars is never allowed to get very dark before I change it. Bill is now in his 90's and his 1960's truck purrs with over 250,000 miles on the original engine.
Please remember my Uncle Bill. He is battling cancer now.
How often do Century and Simplex (for example) recommend the oil changes? This should be logged the way xenon lamp changes are done.
-Mike
I'm suprised they were still available new in the '80's.
A few years back I saw one for sale at a hamfest flea market. It had a $100 price tag on it, but alas I don't think it ever got a new home. I was tempted!!
With the right lens, one of those would be great to have at home!
Since this is not a 16mm site, I wont drone on too long about "candy gauge".. 
The TP-66's that we got in 1980 were in fact brand new. I remember them because I signed the waybill from RCA in Deptford, NJ. Maybe they were new old stock...figures if this is true, we were a struggling UHF indie...
We replaced a pair of TP-6's that were well-used when we got them in 1976. We referred to them as the "chompers" We damaged more film during the 4 years of use than I care to remember.
After the replacement, I informed the film distributors that we had new equipment. Suddenly, we started getting something that until then was unheard of....new prints
!!
As for the lens issue, a pair of Bell & Howell 1.5" lenses are good, except that with the 5 bladed shutters, the image is a bid dim.
I got this pair for the cost of moving them out of the building and loading them on my ugly truck ($0.) There will soon be another one in my garage. I'm thankful for a cement floor!

Thanks for the link. Actually, the TP that I am getting this weekend is of the same vintage as the one in your link--right down to the old RCA badge.
At least I dont have to drive to Dallas to get it!
I will be doing major maintenance on it when I get it home. I got a manual from a film-tech reader along with some old GWTW footage a few months back.
If it interests anybody, I am restoring an old multiplexer so that I can run 2 TP's and a slide projector on the one camera. The camera is just a Vidicon, but works well enough for me to transfer some home movies for friends...at sound speed... Pic does not smear!
Can you record on 3/4"? I've got some great 16mm B-Westerns.... 
------------------
Better Projection Pays!
I have a Sony 2850 3/4" boat anchor that will be in running order within a few months. I can handle VHS-Hi-Fi, Beta Hi-Fi, and 3/4" Lo-Fi. Before I do anything, I will be getting a new (for me) camera to use that I can run with the chroma turned off. I HATE color fringing on B/W goodies.
Rory
Sounds good! Maybe we can work up a deal when you get there? Right now, I've got el-cheapo VHS copies of nearly everything I have in 16mm - you know, the $2 stuff that you can get off the shelf at K-mart and such... But I wouldn't mind having some of my originals xnsfred.
------------------
Better Projection Pays!
I had a chance to grab one of those RCA telecine projectors for $250, but passed. Apparently they're difficult to convert for use as conventional projectors and I don't have space for one, anyway. (I have no need for a film-chain in my house.)
Do you have the original 3-tube camera that's as big as the projector?
Three years ago, I got 1 TP in Nashville from a TV production company when they ripped it out after they stopped doing 16mm work. When I arrived to pick it up, they asked me if I wanted a camera to go with it. Naturally, I said "why not!" and was given a TK-28 camera with the built-in multiplexer, slide projector, and monitor. Somebody brought out a big cardboard box full of papers and small parts and stuck it in the seat of the truck. (When I got home, I found that the box contained the manuals, set-up slides, and 3 spare NEW tubes for the camera!)
The guys at the business helped load the monsters in the truck, and I drove the 300 miles back home.
Here's the bad part:
After spending countless hours and weekends wiring and adjusting the beast, we had a big sync module failure. THEN a bar module died. I forgot to mention that the camera had not been run for almost 2 years before I got it.
THEN we found that we could not get parts from RCA for this thing, and we had access to nothing that we needed for repairs.
I did get to transfer about 30 hours of film before we lost the Chroma modules. After that, I copied a few B/W films, but the video was starting to smear.
----------
We installed the beast at a friends warehouse so there was plenty of room for it and the projector.
----------
We made the decision to scrap the thing after almost a year of begging for modules from friends in TV. We got several spares mods, but could never get the smear out of the video image, so we SCRAPPED (Aaraugh!
) the camera/multiplexer/slide projector!
Here's the good part:
I sold the 3 new tubes, set-up slides, time-base corrector, slide unit, mirrors, and manuals on the net for more than it cost me in vehicle wear, gas, and irritation on the trip to Nashville and back to Asheville. Made $$ on the deal!
About 6 months ago, a local station pulled their TP pair, and an RCA stand-alone multiplexer, slide projector, and gave one projector, and the 'plexer, and slide unit to me to haul. These are currently set-up in my garage along with the TP that I got in Nashville.
I hated destroying the camera, but we couldn't do anything else!
The 2 projectors are clean and in good condition. I have tweeked them and they are gentle on film. I've transferred some 60 year old B/W silent home movies on them with no problems. The image is rock steady.
The one that I will get this weekend is older, but is currently running as a stand-alone "viewer." There's a small speaker and amp installed on it, and it works fine. I love free things!
I promise not to continuously corrupt this site with sucky video, NTSC systems, and 16mm. 
Does that tell you enough, Scott?
Good luck with fixing the old TV's - there's a guy in Indianopolis (his name his name is Jeff Lendaro - an engineer at RCA/Thompson) who is one of the biggest restorers and collectors of old TV's in the country. I'll stick with fixing the old shortwave/ham communications receivers.
Jeff
I've got a 1961 RCA color TV with the round tube that works. I got it in 1975 as junk and put a new kine in it.
Some film-Tech subject, eh?
Seriously, how often should I change the oil in the intermittent and the RCA 1040 gear box?
Since we all know that Simplex leaks oil... How much leaking is TOO MUCH?
I have a lot of theatres call me up and say that the projector leaks oil and they all want me to come and fix it. I just tell them that unless it's gushing oil that they shouldn't worry about it . (There WERE a couple that were bad enough to fix, however.)
I tell them to go get some of those "EZ-Foil" cookie sheets and put them on the floor. Everybody always looks at me like I have three heads when I say that.
What's the consensus on this?
Keep the interior of the machine clean, and oil off the film. Oil on film causes visible "oil mottle", sticking of the film during unwinding, holding of dirt particles, and can actually leach the oil-soluble dyes out of the film (usually seen as tiny green spots in dark scenes).
------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Aaron