Engine/gearbox alignment FH

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Martin K
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Re: Engine/gearbox alignment FH

Post by Martin K »

Morning Mick

Many thanks for the pic - very helpful.

I note that in both your and other pics of that FERC/gearbox squeeze, your mounting nut has no washer under it. Mine has a whopper! About 2/2.5mm thick. I think I’ll have to remove it and put something smaller/nothing on instead to help open out a space.

I’ll keep you posted…

Martin
Mick D
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Re: Engine/gearbox alignment FH

Post by Mick D »

Hi Martin

As you will see from the 'FH' photo, I have no washer on the plate to frame stud on that side either, that's how it was when I disassembled it.

Regards Mick
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paul.jameson
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Re: Engine/gearbox alignment FH

Post by paul.jameson »

You do not need any washer under that nut, because that side engine plate has the flat on the hole to stop the stud turning. So you put the stud through the hole and screw the nut on by hand such that the stud doesn't protrude. Then you tighten it up by putting a nut and washer on the other end of the stud.

When you adjust the primary chain you work from the other side of the bike so you don't need to touch the nut behind the primary chaincase - even if you could get at it easily, which you can't.
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
Martin K
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Re: Engine/gearbox alignment FH

Post by Martin K »

I’ve removed the thick washers leaving a nicely comfortable 2-3mm gap between PCC/FERC and the gearbox amounts.

With PCC back on, it still requires tightening to ‘pull’ it all into line (ie it doesn’t all slickly align, but hey - what’s 0.5mm between friends?).

The clutch basket still hits the inside of the PCC outer. I’ve tried to attach a short vid (not sure if that’s allowed - I’ll find out!) showing quite a wobble on its bearing. It seems to be the reason why it catches, that play is enough to make a connection - at speed that might be disastrous? Is that a) normal (the clutch plates take up the slack etc) b) abnormal - get new needles into the brass cage quick).

Thoughts welcome

Thanks

Martin
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Mick D
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Re: Engine/gearbox alignment FH

Post by Mick D »

Hi Martin

Getting there :D

Fit the clutch plates etc. and see what you've got.

Regards Mick
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paul.jameson
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Re: Engine/gearbox alignment FH

Post by paul.jameson »

As Mick says, try the clutch plates and see if that causes the basket to miss the chaincase. If it doesn't, get another of the 6 hole washer for the bolts which hold the clutch basket on and fit it between the clutch sprocket and the basket. That will move the basket out by the thickness of the washer. I have to have an extra one on my Healey to deal with the same problem.
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
Mick D
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Re: Engine/gearbox alignment FH

Post by Mick D »

paul.jameson wrote: Fri Jul 22, 2022 8:18 pm That will move the basket out by the thickness of the washer.
Err! isn't that in the wrong direction, it's hitting the outer PCC.

Maybe explore moving the PCCs out by shimming the attachment to the frame through stud?

Regards Mick
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paul.jameson
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Re: Engine/gearbox alignment FH

Post by paul.jameson »

As the clutch basket is outside the outer primary chaincase, the extra washer moves it further out, so further away from touching the outer chaincase.
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
Mick D
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Re: Engine/gearbox alignment FH

Post by Mick D »

:oops: :oops: :oops:

You are, of course correct - reminder to self, think Ariel before replying.

Martin, please ignore me

Regards Mick
Martin K
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Re: Engine/gearbox alignment FH

Post by Martin K »

Thanks Mick, Paul

With clutch all fitted, there is less wobble, but still some there.

If I could be really cheeky and ask - would anyone with an FH (or I guess any GB gearbox/clutch combo) with the clutch dome currently off be able to give their clutch basket a good old wiggle and let me know if there is any movement (ie ‘they all do that, sir’) or, have I got wear in those pesky rollers allowing an unusual amount of loose movement. I get a perceptible 0.2- 0.5m movement as it ‘rocks’ on its bearing.

Thanks

Martin
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