steering column length

[Keith Clements]

Dear Each of You,

Richard Homersham is in the process of getting a steering column fixed up for his Jupiter project. To explain, on removing the inner column, it was discovered that it had been cut and welded. Finding this, has raised doubts as to whether the inner and outer columns are the correct length. The outer column appears to have been altered as well.

Does anyone have a steering column, Item Number 3031 in the attached scan from the parts catalogue, that can be readily measured with a tape measure. To the nearest 1/16th” (1.5 mm) will be good enough for our purpose.

I firmly believe that the overall length is important, because of gear shift lever movement – mainly into the reverse gate.

Any help with this request will be greatly appreciated.

All the best and thanks,

Mike A..

See this pdf for Item number referred to:

http://jowett.org/jowettnet/dt/parts/1952book/44.pdf

[Keith Clements]

Hi Mike,

Sorry I can’t help you and Richard. When I fitted the 5 speed floor shift box, I shortened my column up by about 3 to 4 inches to allow for a good driving position. Originally it might have been all right for the “Twiggy” types but for the more solidly built people, the stomach tends to foul the steering wheel, which is not ideal.

Kind regards,

Brian.

[Keith Clements]

Dear Mike, I don't have the dimension you ask for without doing some dismantling of the Jupiter which can be done of course if no one has one on the bench. It is all standard.The column shift is independent of the steering column itself so won't be affected by variations in the length of the steering column as regards to gear changing but any shortening of it more than about 1/2", would bring the gear lever too close to the steering wheel in the reverse gear position. Even as standard the gear lever is quite close to the steering wheel when in reverse. Brian's shortening of the steering column by a few inches would only be possible with a floor shift
Keep in touch, regards to all, Tony G.

[Keith Clements]

Dear Mike ,

I am sorry I cannot help you as there are no more Jupiter rack and pinnions so I am having to adapt a Morris 1000 unit so I will also have to make the column by trial and error but I am pleased to follow the thread

Best regards

Tom

[Keith Clements]

Hi Mike,
Sorry I have a few Jav columns lying around, but my spare Jup column is away with Drummond for refurb. Drums is busy with the Commonwealth games at present.

[Keith Clements]

Mike, The length of 3031 , the outer shaft, I do not think is critical as the inner shaft (3038) is fixed by the universal joint clamp pin and nothing else. If it was incorrect in relation to the inner shaft, the location of the horn slip ring(940) or the lower lock nut (3034) would be incorrect depending on where the tube was joined. The assembly is located on the body by U bolt 3040 and this would be affected by any mislocation of the scuttle in location to the steering rack. That distance is probably the most important. To measure I would suggest going from the chassis vertical plate that supports the suspension to the bulkhead and then from the bulkhead to the U bolt hole. This might change when all the doors are fitted and the mechanicals are put in due to flex in the chassis.

I do not know if Jowett made the SA steering assembly from other parts or if they were manufactured new. It may well be that they made from Javelin components! The SC was a modified assembly.

What is the nature of the problem that led you to this investigation?

[Srenner]

Hello:
From Jup 62.
Outside column: Distance from top of tube to top of threaded boss at the bottom is 28 1/16". Overall is 28 7/8".

Inner shaft: Overall is 35 1/8". From the top near the horn wire to top edge of horn slip ring is 12 5/16" . From bottom of slip ring to top of yoke is 19 3/4".

Cheers,
Scott

[RichardHomersham]

My thanks to everyone for their feedback on Mike's question on my behalf. It is much appreciated and another step forward on a rather long journey of discovery. Richard Homersham

[Mike Allfrey]

A special thank you to all who have responded to my request for the length of a Jupiter's steering column.

All the very best,

Mike Allfrey - E0SA42R