Ruston Hornsby gearbox

[Jeremy G]

Can anyone help me identify this gearbox please as I have a problem? This is on a 2VSH.

[Jen-in-Wellies]

Welcome to the forum. Good pictures. The experts here like pictures! Any clue as to what the problem is?

[Jeremy G]

It sounds like it might a bearing, got noisier now.

[Tony Brooks]

Judging by the apparent polishing on the face of the nut around the output shaft, I would guess it might be the reverse brake band needs adjusting - but it is only a guess and I have no RH experience.

3 minutes ago, Jeremy G said:

It sounds like it might a bearing, got noisier now.

Are you 100% sure that you have the correct handed prop on. If those planet wheel gearboxes are run in reverse for long periods, the planet gear bearings and the gears themselves are liable to wear and get noisy - again from basic principles. However, all such gearboxes tend to be a bit noisy in reverse.

[MtB]

16 minutes ago, Tony Brooks said:

Are you 100% sure that you have the correct handed prop on. If those planet wheel gearboxes are run in reverse for long periods, the planet gear bearings and the gears themselves are liable to wear and get noisy - again from basic principles. However, all such gearboxes tend to be a bit noisy in reverse.

 

The difference in noise between ahead and astern would answer the question. No matter how much or little wear there is, I'd expect astern to be noisier than ahead. So if the OP's gearbox sounds quieter in reverse than ahead, you've probably nailed it and the wrong hand blade is on it.

 

Also, I notice most really old vintage engines like this run anticlockwise viewed from astern, so if a more common RH blade is on it, reverse would have to be engaged to make it go forwards. 

 

 

 

[David Mack]

22 minutes ago, MtB said:

Also, I notice most really old vintage engines like this run anticlockwise viewed from astern,

if they have a reduction box fitted. Those with straight through boxes presumably run clockwise.

[MtB]

5 minutes ago, David Mack said:

if they have a reduction box fitted. Those with straight through boxes presumably run clockwise.

 

Nope. All my engines rotate anticlockwise. 

 

 

No hang on, I think the kelvins are clockwise!

 

 

[BEngo]

All the Kelvin  models J and K I have seen are clockwise from the rear, requiring a Right Hand blade.  I believe you could have them anti-clockwise to special order.

 

N

[Jeremy G]

2 hours ago, David Mack said:

if they have a reduction box fitted. Those with straight through boxes presumably run clockwise.

Viewed from astern the flywheel (which is at the front of the engine) runs anti-clockwise and it has a RH prop, what does this mean? Until recently astern was much noisier now little difference.

[Tony Brooks]

I am fairly sure no gears are involved in ahead yet it has become noisy in ahead, then it sounds as if an output shaft bearing is playing up. That could be between gearbox and reduction box or reduction box bearings. I suppose there is oil in the reduction box

[Jeremy G]

Yes. Plenty of oil in the reduction box and oil from the engine goes into the other box and there’s plenty thrown around.