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Thread: 9A saddle disassembly
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14th January 2010, 07:25 PM #1
Product designer retired
- Join Date
- Nov 2006
- Location
- Heidelberg, Victoria
- Age
- 80
- Posts
- 2,237
9A saddle disassembly
I'm getting close to the end of my Hercus restoration.
I'm now up to the saddle. What traps lie in wait for the unwary?
It's pretty obvious the hand wheel is secured with a tapered pin, that should be easy. It also appears the half nuts are held in place with a couple of locknuts, and I've been warned to look out for flying springs.
What holds the half nut lever in place? It's not obvious.
Any advice would be appreciated.
Ken
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14th January 2010, 08:26 PM #2
Mechanical Butcher
- Join Date
- Oct 2004
- Location
- Southern Highlands NSW
- Posts
- 911
There's a good illustrated description here:
<http://www.steammachine.com/hercus/>
Jordan
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14th January 2010, 08:30 PM #3
Senior Member
- Join Date
- Jul 2007
- Location
- Melbourne
- Posts
- 115
Hi Ken,
The screw in the centre of the clutch knob is LEFT HANDED THREAD.
The half nut handle is retained by a grub screw with pressure spring from underneath.
The studs that hold the rack pinion and cross feed gear are fixed with grub screws.
The worm nut unscrews after the key is released.
Taper pins hold on the handwheel and idler gear selector.
Just remember how the rest is taken apart, particularly the clutch.
Be careful not to hit the studs too hard, as I have found the steel to be soft. Use a full width drift to resist bruising.
It is quit easy really, just use common sense.
Have fun,
Peter
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15th January 2010, 08:31 PM #4
Product designer retired
- Join Date
- Nov 2006
- Location
- Heidelberg, Victoria
- Age
- 80
- Posts
- 2,237
Nadroj,
Thanks for sad tale of "You paid $2000 for what". I read that story some time ago, and my heart sank.
It is unbelievable what some firms think they can get away with. I've been in touch with the author and it seems that all is ok now.
Brittleheart,
As usual, your instructions are concise from a man who obviously knows from past experience, you have got me out of trouble in the recent past for which I'm grateful. So as not to get ahead of myself, I'll repaint the gearbox, and assemble it before moving on.
Thanks all,
Ken