Pedals missing

[Davidppp]

Hello all.

Can anyone venture an opinion as to the feasibility of adapting Jav pedals?

Fabricating new ones from scratch looks a challenge...

Kind regards
David

[Keith Clements]

Be very careful with the brake pedal. After coming back from scrutineering for Marathon, Wally Dale's Rochdale Jupiter needed its pedal welded after an emergency stop outside Buckingham Palace.

Have them crack tested.

If you have big feet and long legs you can probably put more force on the pedal than it was designed for.

[Mike Allfrey]

Just spotted this topic.

I think the brake and clutch pedals were made from cast steel. That assumption was made because those on E0 SA 42R feature the Staffordshire knot in relief, the trademark of the famous foundry. I am reasonably confident that they were not forgings.

I have wondered about the state of those pedals, and I tend to be gentle on braking.

Also important is maintaining the arc of the portion that passes through the toe-board.

Regards,

Mike Allfrey.

[PJGD]

It should be beneficial to use a Girling brake booster in the system; that way the pedal effort required to achieve a given rate of retardation will be significantly less than for the standard unboosted system.

However, while a boosted system is probably a good upgrade to make to a Jupiter in regular use on modern roads, I have not figured out how to apply the booster that I have to my Jupiter. The booster probably needs to be mounted directly to the chassis so that there are no pipes subject to flexing and potential failure, but there are few convenient places to mount such a bulky item. Another conversion that it would be convenient to do at the same time as adding a booster would be to arrange for a split braking system with dual circuits, either split front and back, or possibly diagonally. But this safety-inspired conversion will require a new push-style master cylinder, and where does the booster go in such a system? Just on the front brakes circuit; or two boosters; one on each circuit? I need to speak with my ex-Girling colleagues for guidance. . .

Philip

[Forumadmin]

http://jowett.org/jowettnet/dt/tech/jac ... 31_IMG.JPG
Javelin vacuum brake mod on Amy's XMG

[PJGD]

Thanks Keith for that photo.
I assume that the Girling booster is attached via a fabricated bracket to the body footwell, and that the body is solidly bolted to the frame so that there is no relative motion and brake pipe flexing? Also, it is still a single-circuit system with the original pull-type master cylinder.

Philip

[Keith Clements]

It is on a bracket on the bulkhead. Put on there in the 1960s I think. Very reliable and makes braking considerably easier.