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pull cable knob question
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Sat Nov 21, 2020 12:34 am    Post subject: pull cable knob question Reply with quote



I need to fit cables to these knobs on my instrument panel. That is not really the problem. The question is how should I go about securing the cable/knob to the panel.

I only want some small discreet chrome bezels but I don't know where to find them. I will also need some means of securing the cable steadily to the panel and I am not having much luck there either.

Am I wasting my time trying to get all the bits together ?

Perhaps I need to hand the cables over to "speedy cables" or suchlike and have them sort it out.?
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Penman



Joined: 23 Nov 2007
Posts: 4335
Location: Lancashire

PostPosted: Sat Nov 21, 2020 12:44 am    Post subject: Reply with quote

Hi
Can we see pictures from side on without the panel?
I'm assuming they have a threaded outer.
A thin nut that fits the thread could have the hexagon turned off and then a slot cut across one face, this is fitted on the side of the panel we can see.
Many bezels look like that, then you just need another nut on the back of the panel.
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Peter_L



Joined: 10 Apr 2008
Posts: 2613
Location: New Brunswick. Canada.

PostPosted: Sat Nov 21, 2020 1:43 am    Post subject: Reply with quote

If it were me (Capital I.. Capital F) I would leave this detail to the experts (Your Quote).... I doubt that anyone (PCE).. will even give it a second thought that this was nothing more than what they see........ With so many details in life, the trials, tribulations, sleepless nights, go unobserved... it is what you see, it is never the hard work and stress that went before... You are doing a great job Ray.. made harder by the current COVID... I read all your posts..... Stay Safe and Take Care...... Peter...
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MVPeters



Joined: 28 Aug 2008
Posts: 757
Location: Northern MA, USA

PostPosted: Sat Nov 21, 2020 1:59 am    Post subject: Reply with quote

Ray
You might look at generic choke cables, such as this or similar:

https://www.ebay.co.uk/itm/Classic-Car-Universal-Choke-Cable-Pull-Twist-Lock-60-Long-mini-kit-car-BMC/193556849830?hash=item2d10e324a6:g:3vQAAOSwrQ5b9nYC

or

https://www.ebay.com/itm/Quality-Universal-Replacement-Push-Pull-Choke-Cable-Inner-60-Conduit-USA/363035347666?hash=item548697cad2:g:zXAAAOSwIw1b18J8

Find one with an appropriate bezel, cut the outer to length & substitute your inner cable.
& you end up with a spare cable, useful for cleaning out drain tubes etc..!
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Sat Nov 21, 2020 10:03 am    Post subject: Reply with quote

Thank you Guys.

I have probably been looking in the wrong place.

Some good ideas.

Cheers, Ray.


Last edited by Ray White on Sat Nov 21, 2020 11:15 am; edited 1 time in total
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Sat Nov 21, 2020 11:13 am    Post subject: Reply with quote

I think this is the sort of thing I have been looking for:



Trouble is it looks too "1960's /1970's Triumph" for me.
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Sat Nov 21, 2020 1:37 pm    Post subject: Reply with quote

Here are the original TC cables. They are ALL different.!



1) The choke pull cable.



2) The starter pull cable.



3) The slow running twist cable.



What I have established is that the small chrome bezel to the dash side is an integral part of the threaded cable outer which is D shaped to fit the hole in the dash panel. ( Obvious really. ) and the assembly is held with a spring washer and half nut.

1) The choke cable is the worst condition of the three. It is stuck open but I might eventually be able to free it off. It has a groove in the solid first section which all choke cables seem to have but I can't remember what it's purpose is. The bezel is reasonable.

2) The starter cable operates freely and but the bezel part showing is rusty. This outer has a piece of brass tubing which I suppose acts as a stiffener. The cable would need to be shortened to meet the bulkhead mounterd pull switch.

3) The slow running adjuster is the best condition of them all with no rust although is sans a spring washer. It is an interesting cable that moves in and out as you twist the knurled knob (as opposed to pulling it).

Unfortunately, the knobs are black and won't come off. I want to replace them with these:

.

I need to be very careful with the original knobs because although they don't necessarily fit in with my plans for the dashboard they are in reasonable shape and are like gold dust to anyone who is striving for originality. If only I could remove the knobs without damaging them!

The other option is to paint them but from past experience I don't think that a good outcome is very likely.

I could send the cables away to be restored/replaced but the originality will likely be lost....
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alastairq



Joined: 14 Oct 2016
Posts: 1541
Location: East Yorkshire

PostPosted: Sat Nov 21, 2020 3:52 pm    Post subject: Reply with quote

Re-choke cable? The groove may be something to do with the pull-twist-thus-locking system?

Old Fords' choke cable often were simple pull-on device, without a locking system [but, not all]....
Hence why the FSOC gave away patent choke cable locks...AKA nicely engraved clothes pegs..to hold choke cables out whilst driving...

Will it be possible to get some bezels and bolts turned up for yourself?
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Sat Nov 21, 2020 4:48 pm    Post subject: Reply with quote

alastairq wrote:
Re-choke cable? The groove may be something to do with the pull-twist-thus-locking system?

Old Fords' choke cable often were simple pull-on device, without a locking system [but, not all]....
Hence why the FSOC gave away patent choke cable locks...AKA nicely engraved clothes pegs..to hold choke cables out whilst driving...

Will it be possible to get some bezels and bolts turned up for yourself?


I think what I will do for the choke and throttle cables is remove the old inners and replace them with new (generic) ones. If I can remove the modern knobs I can insert the new inners into the original outers with my cream knobs on.

With regard to the bezels (which as I mentioned are an integral part of the outers) the choke one looks O.K. and I can clean up/chrome finish the tired throttle bezel.

The slow running cable is more involved but fortunately I can unscrew the knurled knob. I will be cutting a suitable thread into the new cream plastic knob and fit it instead.

As the bezel on the slow running adjuster is in good condition, that should be job done.
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Tue Nov 24, 2020 8:30 pm    Post subject: Reply with quote

I have decided that Peter L has the better plan. I have spoken to Speedy Cables in Wales and subsequently sent them the starter and choke cables and the new knobs. They will make a much better job of it than me.

I will modify the slow running cable myself as it just needs the knobs changing over. Nothing is ever straight forward though is it?.

Just to be awkward, the knurled knob thread on the cable is 5/16" x 26 t.p.i. which is BSC (cycle) so I have had to buy a set of taps to cut a thread in the plastic knob. I attempted to heat the cable and melt a thread into the knob but it was not a success. I will also need a 7.2mm drill which, with luck, I might have.

If not I will have to buy one of those as well!
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Miken



Joined: 24 Dec 2012
Posts: 386

PostPosted: Tue Nov 24, 2020 11:50 pm    Post subject: Reply with quote

Ray White wrote:


Just to be awkward, the knurled knob thread on the cable is 5/16" x 26 t.p.i. which is BSC (cycle) so I have had to buy a set of taps to cut a thread in the plastic knob.



Or BSB (brass) , i would have thought (as its not a bike).
55 degree thread angle instead of 60.
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Ray White



Joined: 02 Dec 2014
Posts: 4215
Location: Derby

PostPosted: Wed Nov 25, 2020 1:18 am    Post subject: Reply with quote

Miken wrote:
Ray White wrote:


Just to be awkward, the knurled knob thread on the cable is 5/16" x 26 t.p.i. which is BSC (cycle) so I have had to buy a set of taps to cut a thread in the plastic knob.



Or BSB (brass) , i would have thought (as its not a bike).
55 degree thread angle instead of 60.


I do hope not as I have just ordered some BSCy taps!
I considered BSB but it's not brass.

Another thought that crossed my mind is that light weight cables were most frequently used on bicycles and motor bikes and considering MG construction owes much to bike manufacturing practices I was led down that road (so to speak).

I don't expect it will matter that much so long as I can tap a thread in the plastic good enough to screw onto the end of the cable. Perhaps if it is a tight fit then so much the better. Confused
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