Scott 1000 TP should fit right in it, that’s what the Ralph Wood ones (which are modified MGs) use.
My first Motor Guard was the new type with no screen. The demonstrating machine had the old type with the screen. The first time I changed the toilet paper I didnt see the screen stuck to the paper. The demo machine had a gear pump. When I turned on the pump I tripped the circuitbreaker for a row of flea market vendors.
One bad thing about the San Jose California models is they were designed to seal inside the core when most toilet paper had a 1 1/2 inch core
I normally use Great Value 1000 from Walmart. Its a little smaller than Scott 1000. Dont have to unroll as much. I set up a Flat head Ford V8 canister filter to take a full roll of 4 1/2 inch diameter Scott 1000. They origionally used Cotton. I have half a roll of VIVA paper towels in it now.
I was thinking of buying one of these filters but decided not to as the cdn dollar took a tumble and I do have two of the later M100's, how many does a guy really need? The seller sold all of them, don't remember exactly, but it was 25-30 or so units.
The San Jose California Motor Guards were pretty much useless unless you can find 1 1/2 inch core toilet paper. You might be able to save your used toilet paper cores split them and put them inside the bigger toilet paper cores.
Grand auto parts was trying to get rid of the screen types by charging 12 something for them. I was catching hell at the flea market. I was selling the later models for 29.95. It was I can get Motor Guards at Grand auto parts for 12 something. I thought they were bsing me. Motor Guard didnt like under pricing them. I was paying 19.95 as a dealer. The retired Boeing engineer told me how much it cost to make them with hose and fittings. About 7 bucks.
I liked the design of the Motor Guard a lot cleaner to service. Frantz was trying to sue them out of business. They were the only ones safe to use for compressed air. They went broke selling oil filters The bs stories about toilet paper breaking down in motor oil didnt help. They at first liked me selling them. When I asked them to send me 100 with no coating that was the last straw. Occasionally the coating will fail. The origional oil filters had no coating. Some Motor Guard enthusiasts remove the coating with carburetor cleaner. I havent had problems except with some gasoline filters. Ran a Toyota over 200.000 miles on gasoline. The coating lasted about a month with gasoline on the Farmall H. One customer sent me a picture of one on a transmission. He dealt with it. Probably carb cleaner. The filters were designed to use toilet paper not the expensive elements. Another problem.
The Australian Jackmaster is the best oil filter .you can buy new. Hopefully they can compete with the inferior but biggest name in toilet paper filters. The Frantz. I had to have one. Drilled out the orifice and used a Perma Cool universal 189sandwich adapter on the Pontiac Torrent.
I moved away from splitting used tp cores to used spent tape rolls, most electrical, hockey tape rolls are 1-1/2" inside diameter, peel off the outside of the roll for an interference fit, it's highly technical work...lol.
When those were new Motor Guard was in San Jose California. Motor Guard started in 1961. They were designed when all toilet paper had a 1 1/2 inch core. The good paper was 2 ply. 1 ply was loose wound.
The flat washer you put in the bottom of the Motor Guard M 30 is the toilet paper core seal. If it isnt a tight fit it will stick to the used paper and will be pulled out. Its a vacuum seal like my teeth.
