Throttle spring arrangement

[RobHomewood]

I am struggling to understand how the throttle spring arrangment should work as the parts book doesnt show the spring or where the other end of eth spring would eb attached. My car is a adaptation between a '39 14 and a '47 16 engine and I have no throttle spring anchor arm fitted at all but have found 2 possibles [img][url=http://s172.photobucket.com/user/RobHom ... w.jpg.html][IMG]http://i172.photobucket.com/albums/w27/ ... q3uicw.jpg[/img]- one of which I am guessing may be ‘39 14 version Part No 56898 and the other the 47 16 (Part No 07038)?

Could anyone send me photos of the proper arrangement on the '39 14 or the '47 16 please so that I can work out what is missing and where? The Spring anchor arm should be on the pivoting rod connector fixed to the manifold just under the carburettor shield.
Many thanks

[luli]

The following picture will give you the general idea:

[RobHomewood]

Thanks for yoru reply Luli- I wish my engine compartment were that clean and smart!
Two questions- the throttle spring seems to be going off towards the bulkhead - what does it connect to there?
and it looks as though your anchor arm for the throttle spring may be cranked or offset - is there a particular reason for that?
Rob

[luli]

Mhmm... I wish it was mine. Actually, The photo refers to the most expensive Rover restoration ever: http://www.rover-forum.thersr.co.uk/vie ... &hilit=DHC . Sorry for not being able to answer your new questions, but it may answer the original one.

[47p2]

This is from a 1947 16hp

[TonyG]

Rob,

my car used to have this arrangement when it was still fitted with a single carb back in 1980s. However, I'm pretty certain that it used to operate as follows:

There is a bracket bolted at one end under a bell housing bolt and the other end has a small hole for the spring. This bracket is about 2.5" long and tapered at the small end. The spring then goes to another, similar but smaller, bracket that you can see on the picture from Luli. The reason that this appears cranked is that the hole through which the throttle passes is slightly oversize. This allows the small bracket to be slid along to adjust the spring tension. The tension of the spring pulls the bracket so it grips the rod.

Hope that helps.

Tony.

[RobHomewood]

OK thanks for that advice. I have tried to set up my spring as described but found that the holed bracket which is supposed to fit over the throttle rod just slips down the rod when the spring is attached - even without road vibration. It may be that the hole is too large becasue the bracket is not correct. At the other end I could find no sign of any fixing bracket for the spring (possibly because this is a '39 car) and so I fitted the smaller bracket I had under the bolt of the clamp on the accelorator rod. After initially slipping becasue the clamp wasn't tight enough this arrangement seemed to work OK with the two springs (the original being on the accelorator rod on the bulkhead.
However it would be better if the carburettor were not sticking and therefore needing this extra spring to return the throttle after accelerating! I shall contune to discuss this with the carburettor refurbisher.

[Phil - Nottingham]

This shows the carb bracket with the small hole that the linkage rod spring hooks into. If you need one of the actual rods I will have to take a photo but I have just locked up now so it may not be till Tuesday

[Phil - Nottingham]

The arrangement works very well as long as the hole is not oval or the rod is not grooved and the lever is in the correct position. It hooks into a downward extension of the carb throttle lever

I can post a pic if you cannot find the car anchorage

[RobHomewood]

Thanks Phil. I would appreciate a pic if you would. I have neglected the car for a month whilst doing building works but can now go and visit here again!
Rob