I agree with everything but the method of attaching the spring on the
manifold bellcrank shaft. My car (145519) came with a small teardrop
shaped bracket that fits on the shaft under* the bellcrank.
The other end is attached to a similar, but elongated bracket , which
goes on the transverse relay rod between the ball joint and the lock
nut on the firewall end.
The Moss catalog shows the latter bracket in the illustration for the
BN1-BN2 throttle linkages as well as the spring, but the manifold end
bracket is just shown as an undefined attachment to the bellcrank
It should be very simple to fabricate one.
* The drawing shows it on top of the bellcrank, but it fits better
On Jun 16, 2004, at 3:34 AM, John Harper wrote:
> Sorry but I have to disagree with you here. Yes there are return
> springs on the actual carburettor spindles as you describe but in
> addition there is the extension spring (1B 2711) that runs fore and
> aft more or less alongside the forward and aft link that goes between
> the bell crank on the exhaust manifold and the body bell crank on LHD
> cars and the cross shaft on RHD cars.
> The front spring loop goes though the manifold bell crank pin and
> doubles as a method of holding the bell crank spring washer in place
> and compressed. Some owners fit a split pin here as on page C/2 of the
> workshop manual and then fit the spring through the head of the split
> pin but this arrangement does not seem quite right. A split pin is
> called up in the parts list but it is likely that this is a hang over
> from the A90 Atlantic list.
> The rear of the spring fits through a small right angle bracket (1B
> 2714) which is fitted under the lock nut of the rear ball joint where
> it is attached to the forward and aft rod.
> Incidentally the diagram on page C/4 has always been wrong. Very early
> on it was realised that ball joints were only safe when in tension and
> the arrangement was changed but the manual never got corrected.
> All the best.
>> Tim -
>> H4 and H6 carbs have the throttle return spring
>> wrapped around the throttle shaft itself - so AH 100
>> and 100Ms don't have your typical throttle return
>> spring (as you describe). If your car has a throttle
>> return spring connected any where else other than
>> being wrapped around the throttle shaft, it's not
>> original (not a big deal, I have a non-standard
>> throttle return spring on my car... many 100 owners
>> '53 BN1 '64 BJ8
>> --- timothy bolish <firstname.lastname@example.org> wrote:
>>> Hi, Can somebody tell me were the proper placement
>>> of the throttle return
>>> spring goes on a 100-4 and I guess the 100-4M is the
>>> same. I know the one
>>> end goes on the horizontal shaft next to the
>>> bellcrank by the firewall but I
>>> have seen the other end go many places. Where is the
>>> proper place.