MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MG Y Type - YA accelerator trunnion.

Here is my accelerator cable ready to affix to the pedal shaft - but the WSM diagram shows the cable sheath with a threaded end, which I don't have, and a typical simple trunnion. Can anyone advise whether the "threaded end" piece is available anywhere? - I like the principle of securing the sheath, and adjustable.
I know ... I'm overthinking it ...
PS - have seen the 2017 comments in the archives - very helpful if I can't find a threaded end piece.

Yours,
John.

J P Hall

hi John
trying to remember how that goes - actually that's not quite true, I don't know at all-- is there a thread in the toeboard or does something just butt up against it----
William Revit

Hi All,
Here is an image of the end of my cable. (YT not Y but I think the same)
It is taken from the engine bay side of the fire-wall (toe-board), and there is a thread in the fitment there.

The brass ferrule just slides onto the cable.
I can't tell you anything about the thread, except that its outside diameter is 6.3 mm, so I guess that is 1/4 inch as best I can measure it.
I suggest you could remove the cable, and try a few threads, probably BSF since the BA 0 is smaller than this. Then off to a bike shop to see if you can match it.

hope this is a help.

regards KGM
(The picture was taken on its side, from over the RH wing. but now seems to be rotated?)


K G Mills

Hi again,
just a PS

A thought on threads. It could be a CEI.

I'd be trying the local bike shop. Those guys are usually quite helpful.
You can find these things on the web of course (isn't everything) Try searching "cable adjusters"

cheers KGM
K G Mills

Willy and KG - it looks as though maybe the arrangement differs between saloon and tourer - the abutment bracket in Keith's picture is entirely different to the YA, so perhaps only the YT had the threaded adjuster? It may also be that the cable securing clamp or trunnion is not the same between saloon and tourer. Someone with both, like Paul B or Tony S, may pop up with clarification I hope.
John.
J P Hall

Hi John ,
I really don't think there is any difference YT to Y in this regard.
What I'll do, is
1. photograph my accelerator pedal assembly, (it is the same as yours),
2. find an image of the little cable adjuster which goes on the engine bay side, not at the top of the accelerator pedal shaft, (This is the bit you referred to as "Threaded end")
and
3. get an image of the little fitment used to locate the cable in the accelerator pedal shaft.

Watch this space. P4obably tomorrow.

regards Kevin Mills
K G Mills

Hi John
here is bad weather, snow ;-(
i went in my garage for you
and took a some pictures
my car was rebuild as i got it
and it was a original car i think

there is no thread in the engine bay
the cable is sitting between the trunnion
and a screw clamps it

i hope it will help you




FT Franz

Hi John
Mine is a YA and is the same as Franz' car on the engine side .
Where it attaches to the top of the pedal the little cross bolt on mine has a hole through it and the inner cable pushes through that hole before it is tightened up . Got to admit it was a hell of a fiddle to get it through.
Cheers John B
J K Bowman

Hi John,
Franz's images are good, though I think he has an after market adjuster on the end of his cable in the engine bay.

There seems no other difference between my YT and his YA.

So here's my tuppence worth in the pdf attached.
(Yup, I am an insomniac.)

cheers KGM
PS John B
I identify with the remark about it being a bit of a fiddle to assemble.

K G Mills

That's tremendous help thanks Kevin & Franz. So on the engine bay side, the flat plate looks the same; Kevin's adjuster rod looks to screw in there, whereas the YA just has a (presumably screwed in) piece to receive the end of the outer sleeve. No doubt it's possible to instal the adjuster rod in the YA/YB - if you can find one.
I also notice Kevin (thanks for all your detail) you have the same convoluted bracket arrangement to set the accelerator pedal in the best position relative to the side trim panel.
Franz, you need to go to bed now.
John.


J P Hall

John
Found this--1/4" CEI is cycle thread so would be 26tpi -AND ,your lucky day 1/4" BSF is 26 as well so you'd be in with a good chance of it fitting to your threaded firewall I reckon

https://www.classicbikespares.com.au/product/cable-adjuster-1-4-cei-x-1-1-2/
William Revit

Hello William,
great work to find this adjuster in Oz. And as you say, the thread being CEI is probably more or less interchangeable with BSF anyway if need be. I reckon John appreciates your find.

And to John.
I have a "spare" trunnion, actually the one I photographed for that pdf I posted.
You are welcome to it if you want it.
It isn't exactly what the WSM shows, but it can be fitted with a little bit of work. It would only cost me a stamp.

cheers Kevin M
K G Mills

Willy, you're a bloody marvel, mate! Well done - I'll be calling them on Monday and ordering a couple ( I never order 1 of anything!).
Kevin I need to check my box o' bits, because I have a feeling I might have that type of trunnion setup; but I'll let you know either way - thanks for the offer.
That probably wraps this thread up for now, but so good to exchange views like this, especially with photos.
Cheers all.
John.
J P Hall

John,

Attached are photos of the accelerator cable fitted to YB0952. I believe it is original. The outer flex sheath simply slides into the nipple on the firewall and the adaptor on the carb throttle arm. Neither end is threaded. [I have upgraded the engine with twin 1 1/2 " H4 SU's, manifolds, air cleaners and valve cover per TF1250 but the original YB cable works just fine.]

I agree with you that the two-part bracket arrangement to set the accelerator pedal is a convoluted mess.

Perhaps Franz can design a system whereby the two parts fit positively together, ensuring proper side clearance for the pedal shaft and that the holes for the shaft are perfectly aligned. I find one or the other bracket always twists as I tighten it down, causing the shaft to bind up. Franz I will be happy to work with you on this.

Rocky





Rodney C "Rocky" von Dullen

Hello Rocky
i don't understand what you mean.
maybe it is because of my bad english

why don't you make a little drawing or a picture so that I can understand you?


one thing to show what is possible today
the bracket for the leaf spring in the rear are certainly rusty on many cars because the dirt that sits in there promotes rust. I designed a 3D part, had it laser cut and edged and it fit on the mm

if you can work with freecad you can design and print it or you sent it to a cutter shop, like this it is possible to make parts you can t get
and i am not a professional i am a medical doctor

today i printed the letters for my original like number plate for my MG TA (nearly ready)
i love my printer ;-)





FT Franz

Hi all,
seems there is clearly a bit of variation in the cable adjuster looking at Franz's pictures and Rocky's.

But here for fun I have put William's cable adjuster over the diagram in the WSM, with acknowledgements to LTBY's.
Clearly, the WSM voted for a threaded barrel adjuster at least for some of the Y's.

And the adjuster is a much more convenient way to fine tune the cable length than doing it at the accelerator pedal rod.
I didn't have a lot of probs with the mounting bracket(s). It went together just fine. Lucky I guess.

cheers Kevin M
K G Mills

Hi all,
Seems I learnt something more today.
Pesky bikie friends tell me that modern barrel adjusters can come disguised in mufti. but still be threaded and still be adjusters. The adjustable bit is apparently shrouded in a slightly enlarged cap. Which makes manual adjustment easier. Pictures show assembled and dis-assembled adjuster. Maybe that's what Franz has, but it doesn't look likely. I just don't know, though cables in my experience are usually fitted with adjusters..
As to the mounting brackets. I didn't have a problem assembling mine. Guess I was lucky.


cheers Kevin M
K G Mills

J P Hall

You have way too much length of cable at the pedal.

To be 100% original, on Y, Y/T and YB, the cable sheath butts up into the guide on the engine side and the inner cable only passes through the bulkhead into a gripper fit holder. Log into the BBS and search the archive thread on Accelerator Pedal PinchBolt Arrangement (yes the thread is PinchBolt not Pinch Bolt).

If you contact Willem Van Der Veer he may still be able to get hold of the 9mm holders. You need one of these to sit inside the holes on the pedal shaft and the sideways movement of the gripper is eliminated by the cable passing through the gripper which is secured in place by a grub screw.

Anything else is NOT original.

I think this answers your question if I understand the picture correctly.

Paul
Paul Barrow

Paul - acknowledged, the pic was taken before everything was set up properly, and I've since put in a new cable which operates smoothly. I did say I had read the archives and found them useful - just looking for ideas about possibly incorporating the threaded adjuster. Willem VdeV is a good idea.
Kevin, your pictures will certainly help others down the track too, so thank you.
John.
J P Hall

It's easy to make the cable clamp for the pedal end.

Remove the terminal from a spark plug & drill a cross hole in the centre to suit the cable size - screw a 2BA into the terminal & fit to the pedal.

Slide the cable through the pedal slot, through the cross hole & tighten the 2BA screw - job done.

Now go and make a spare one and keep it in your "roadside rescue" toolbox. Someone (maybe even you) will thank you one day.

BTW Rocky - your fitting bolt on the manifold is on the wrong side of the bracket - should be on the engine side - see image attached of YA & YT slotted fitting bolt position. Fitting it the way you have it, actually leads to the bolt unscrewing and being lost, leaving you with no throttle on the side of the road.

Safety Fast

Tony Slattery
The Classic Workshop
Black Mountain QLD
Australia





A L SLATTERY

Hi Tony, I think you mean 4BA. (?)
But what a clever idea.
However since there isn't a lot of meat in the spark plug cap, (they are waisted usually) and of brass, your recommendation of carrying a spare is also a good idea,

regards KGM
K G Mills

This thread was discussed between 31/03/2022 and 07/04/2022

MG MG Y Type index

This thread is from the archives. Join the live MG MG Y Type BBS now