MTFCA Forum

Not sure what other 1911-1912 cars these went on but from what I've seen it was only the Torpedo and some other open cars. I toyed with the idea of calling it "the Carrot" but wasn't sure anybody else calls it that...all of us who drive the later cars with the larger 2909 sediment bulb just refer to it as "the Potato" or the "Sweet Potato". But this one looks like a "Carrot" or "Okra" to me, sooo, what do you guys call it?

Let me know if there is any thing amiss...of course the next assembly will be that tank with this sediment bulb. Not sure why it's called a "sediment bulb" because there isn't much room for sediment to drop to and there is no screen like on the "potato" bulb to keep it out of the fuel line...so I think installing one of those "in tank" filters like I've got illustrated here would probably be a good idea.

I'm also not sure which way is off on the shut off valve 2907...usually when the handle points in the direction of the flow it is in the open position...if somebody knows which way is off and if I've got it positioned in the "on" position, that would be helpful, because then I could mark it on the drawing

Nice work again Martynn. I am not at all familiar with that style of sediment bulb, so these observations may not apply.

The standard drain petcock has a tapered thread to fit it wherever it is needed. Hence the washer you show is redundant. It would be needed if the tap had a parallel thread and a land up to which it is threaded.

Early petcocks did not have the spring, washer and split pin on the turn piece. Rather, there was a chamfered, stepped washer and slotted set screw to hold the same in place. When these taps wore, pressure on the taper became non existent, and they could easily turn themselves open, with disastrous results if it was a pan petcock.

Allan from down under.

I’m sure that all will agree with me that 2907 as shown is in the open position and both the 2908’s are closed
Alan

Hi Martynn

I'm not sure when the change to this one was, but the tank on my '11 is on the passenger's side and permanently attached. It's an August '11 car.

The handle should come off to the passenger side, not the top. The open position is with the handle hanging down. Although it seems as if it is wrong (typically an "open" position has the handle parallel to the line) although unlikely, in the arrangement of these, bumby roads and gravity could jiggle the weight of the handle down to the "closed" position. All the Model T gas valves were this way. The later sediment bulb also has the handle down for the open position.

: ^ )

Keith

Ok, Revision 1-B

Revision 1-C

Revision 1-D...it ocured to me that if the opening on the 1909-1910 was larger than I had originally thought, than maybe this one might just be also...it would figure that the more volume coming from the tank would apply enough pressure to force the fuel through the 1/4 inch valve and fuel line to the carburetor, by the sheer weight of the fuel flowing into the bulb since there is no pump to provide and maintain the flow.