Choke / Throttle Knob - Same ?

[Ironhorse]

I have some how acquired a threaded knob with the standard front not the CST stainless front. Sorry for the pics, not the best I know. Hard to see but the inner portion of the knob is threaded. Knob heighth measures 1'' front of face to the back. Much shorter than the slip on radio knobs but looks quite similar. Is the knob the same as used for the manual throttle and the manual choke? Not sure where I got it from, have parted a couple trucks and made several parts buys from time to time. Can any one tell me if they are inter-changeable?

[LockDoc]

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I can't tell from the pictures. Does it have a set screw also? I know that the wiper/washer & the throttle knobs both have set screws, but the choke knob may screw on.

LockDoc

[Ironhorse]

Leon, no set screw as the washer knob has. Was not aware the choke know had a set screw? As mentioned, hard to see in my less than professional pics but it does have internal threads.

[LockDoc]

Originally Posted by Ironhorse

Leon, no set screw as the washer knob has. Was not aware the choke know had a set screw? As mentioned, hard to see in my less than professional pics but it does have internal threads.

You may have misread my post. I don't know for sure if the choke knob had a set screw but I know the throttle knobs did, so if it doesn't have a set screw it can't be a throttle knob....

LockDoc

[Ironhorse]

Well with it having no set screw I would say that the knob is neither the w/s washer knob or a throttle knob. That leaves the choke knob only since it has no shaft like the H/L knob. Thanks for the info Leon.

[LockDoc]

Originally Posted by Ironhorse

Well with it having no set screw I would say that the knob is neither the w/s washer knob or a throttle knob. That leaves the choke knob only since it has no shaft like the H/L knob. Thanks for the info Leon.

No problem. Just for information in the thread, even though the throttle knobs and W/W knobs both have set screws they are different lengths. The throttle knobs are longer.

LockDoc

[sboris]

I know my choke knob is threaded. The knob itself threads onto the shaft. No set screw.

[LockDoc]

Originally Posted by sboris

I know my choke knob is threaded. The knob itself threads onto the shaft. No set screw.

That's what I thought Shawn but I was too lazy to go out to the '67 and confirm it.... .. Thanks.

LockDoc

[leddzepp]

Choke knob and Manual throttle knob. Note the differences.

[leddzepp]

Uno mas. The threaded shaft on the manual throttle is a larger diameter then the one on the choke.

[LockDoc]

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Neither of the manual throttle assemblies I have, have threaded knobs, they both use set screws as shown it the picture. I am using a W/W knob for one of them. You can see how much shorter it is. The coarse threads on the shafts are for fine tuning the throttle setting. You can screw the knob in or out to change the setting of the RPM slightly. Zepp, If your throttle knob has a set screw I'm betting it doesn't have threads either.... I don't see a set screw in either picture but it may be hidden.

The second picture is of the choke cable. In the picture you can see two small flats on the shaft. That is so you can hold the cable to unscrew the knob. I use needle nose pliers to hold it.

LockDoc

[leddzepp]

It has a set screw, and from the appearance it looks threaded to me. I've never examined it that close or tried to remove it. It is original so it is probably not threaded as you state.

[Ironhorse]

Thanks for all the replies and the good info. Always something to learn on these trucks and this board is the place to do it for sure. Much appreciated the info and the pics.