How do you refill such a model?
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The tanks are part of the air brake system, just moved from the original design location, under the frame, to the roof-top area, to make room for passenger service water tanks and bigger fuel capacity. The real ones get refilled by the locomotive's air compressor. The models don't need to be refilled.
@ns1001 posted:How do you refill such a model?
"Refill" with what?
What Lionel model? There's many BTO models with various configurations of tanks on top.
It doesn’t matter what specific Lionel model this is. The tanks on the top of the long hood are AIR TANKS, not fuel tanks. They don’t get “refilled” with anything but air from the on-board air compressor.
As Arthur pointed out above, the air reservoirs are up there to make room for larger fuel tanks and water tanks for those GP9s used in long-haul freight service or commuter passenger service.
Of course. It sounds like the poster cannot locate the exhaust holes? Or they don't even have the model and are just asking for the sake of asking
There is tons of info out on the web on real prototypes. These were know. As torpedo geeps or passenger geeps. Some nice shots of them pulling the new river train in chessie colors if you need some modern photos for reference.
Look at one of the Reagans videos' on refilling the Lionel GP9 engine with smoke fluid and he says to take the dynamic brake cluster off so you can access the smoke unit filler hole. With all the additional piping on top this becomes a real chore.
@Arthur P. Bloom posted:The tanks are part of the air brake system, just moved from the original design location, under the frame, to the roof-top area, to make room for passenger service water tanks and bigger fuel capacity. The real ones get refilled by the locomotive's air compressor. The models don't need to be refilled.
For air when in passenger mode. That’s what Lionel said. I had 2 on pre-order. I gave them up for a member.
@Bryant Dunivan 111417 posted:For air when in passenger mode.
Not all "passenger" GP's had torpedo tubes. The Burlington had steam generator equipped GP's without them.
Rusty
In Baltimore, we used to call the B&Os ones "torpedo boats". I do not recall seeing one mu'd with a u-boat, though. 
@ns1001 posted:Look at one of the Reagans videos' on refilling the Lionel GP9 engine with smoke fluid and he says to take the dynamic brake cluster off so you can access the smoke unit filler hole. With all the additional piping on top this becomes a real chore.
If you had made it clear in your first post that you were talking about smoke fluid, I think you would have gotten better answers. I, along with several others in this thread, thought you were talking about the real thing.
I have never understood why anyone would want a diesel to smoke, anyway. In the real world, a diesel emitting a lot of smoke had something wrong with the prime mover, and was a candidate for some serious shop work.
After many years dealing with Lionel Diesel smoke issues I finally figured it out. Now using the Lionel Cab-1L/Base1L command set and using smoke fluid in a needle applicator every thing works fine and that video I mentioned no longer is necessary.
