self change gearbox

[pugsleyaddams]

has ayone any info. on my gearbox ?,
its made by 'self changing gears coventry'?.
thanks... /forums/images/graemlins/smirk.gif

 

[RobWales]

http://en.wikipedia.org/wiki/Self-Changing_Gears

 

[Bilgediver]

Sounds like it is a wilson epicyclic gearbox . The gears are probably engaged by contracting brake bands on the epicyclic carriers with a cam type operation. This is usually adjustable if the gears fail to fully engage or release.

Find a bus engineer retired... He'll know about these.

 

[coastwise]

I have a pair of these on my vessel - built like brick shithouses. Firm taken over by Twin Disc, now out of business I understand.
If you need parts or advice - try Graham Knight at GB Marine, Atherstone - 01827 718350

Paul

 

[NorthUp]

Got one here if you need another.....

 

[Latestarter1]

SCG marine gearboxes were not pre-selector boxes on the Wilson principal.

Very popular with MOD so spares available, try Woods of Crediton.

Like many British icons British Leyland was the end of them, Hawker Siddley did them no favors either.

Cummins purchased SCG, Onan, Newage etc in the mid 80's. When huge potential litigation was discoved on diesel railbuses to BR due to flawed gearbox design. When poison pill was discoved Cummins unloaded SCG to Alvis swiftly. Gearboxes replaced by Voith a huge cost.

SCG was still producing MOD spares until the sale to Alvis, so there must be plenty of spares around, just need the knowledge to go with it.

 

[Alicatt]

Back in the late 50's early 60's my father had an Armstrong Siddeley Saphire limousine with the Wilson pre selector gearbox, from what I remember it was reasonably quick and it was only the engine note changing that you knew it had changed gear, I remember my father demonstrating it to all and sundry, including, putting it into reverse at 50mph and the car slowing down then going backwards.

Wrong thread