What's on your bench today?

[Moose McAlpine]

1 hour ago, Khriss said:

Brent Cross ?? Not far from me office then. K

Yep, just up the road from there. My old place was Watford near junction 19. Back here for now while i try to recoup money and move abroad.

 

Shame i don't have all my stuff here though.

[Khriss]

@Moose McAlpine bags more room in there, get some ceiling hangers. K

[bmp01]

12 hours ago, SpannerRat said:

The flywheel side is the PTO side on these, clutch bolts to the flywheel. The bearings looked ok when I slid the pot off for a peek.

Ok.

All the torque through one crank web and shaft then. Still a bit odd (for it to spin). Also I dont see how it gets to be so far out, should have stopped running long before then. Or did it have some bad event during its last run ?

 

[SpannerRat]

Ok.
All the torque through one crank web and shaft then. Still a bit odd (for it to spin). Also I dont see how it gets to be so far out, should have stopped running long before then. Or did it have some bad event during its last run ?
 

I don’t know the history of the machine unfortunately. Crankshaft is out and all looks fine. Can’t see any damage.
Thinking may be the wrong crank, can’t find any reference to the number 4159 031 1600 A so no further forward.

[bmp01]

21 minutes ago, SpannerRat said:

I don’t know the history of the machine unfortunately. Crankshaft is out and all looks fine. Can’t see any damage.
Thinking may be the wrong crank, can’t find any reference to the number 4159 031 1600 A so no further forward.
 

I wrote in my previous reply 'bet its a parts bin issue' then deleted it as it sounded disrespectful ??

 

Oh well, if the crank fits and there's nothing wrong with it you can always have a go at fitting a flywheel without a key,  use your other machine as an example for where the flywheel should be. Been there, done that,  haven't we Mr Spud  ?

[openspaceman]

3 hours ago, bmp01 said:

Oh well, if the crank fits and there's nothing wrong with it you can always have a go at fitting a flywheel without a key,  use your other machine as an example for where the flywheel should be. Been there, done that,  haven't we Mr Spud  ?

I've been debating trying this on a stihk where the flywheel key has sheared but not felt courageous enough yet.

 

I'm guessing one must mark TDC and whatever advance it needs, assemble it and then use a strobe to check how close you get.

[Toad]

9 hours ago, openspaceman said:

I've been debating trying this on a stihk where the flywheel key has sheared but not felt courageous enough yet.

 

I'm guessing one must mark TDC and whatever advance it needs, assemble it and then use a strobe to check how close you get.

I did it on the huztl/farmertec 372 I built after shearing the key. I marked the flywheel and crank with a sharpie so I could see when they were aligned and made sure both surfaces were nice and clean. Worked OK.

[bmp01]

10 hours ago, openspaceman said:

I've been debating trying this on a stihk where the flywheel key has sheared but not felt courageous enough yet.

 

I'm guessing one must mark TDC and whatever advance it needs, assemble it and then use a strobe to check how close you get.

In my case a 395XP. Same thing sheared the key, didnt clean the taper, doh.

If you get lucky, there is just enough evidence of where the key was - so trial assemble like that to sort your alignment (use a piston stop and mark the outside of flywheel to some feature on the housing...or coil). If you're unlucky (no evidence) you need a machine to copy or as you say use a strobe and trial and error.

Disassemble. Use fine lapping paste to mate the two surfaces. Clean thoroughly. Repeat as necessary. Assemble dry or with loctite, epoxy, Devcon, JB Weld, what ever takes your fancy and dependant on how ripped up the surface is. Take care not to shift the flywheel as the nut is torqued up. DO torque the nut up.

 

I'm not inventor of any of this procedure - it's pretty common place for the US modders to want timing beyond the half a key mod. And of course Mr Spud here has fixed many a machine without resorting to new flywheel.

 

 

 

 

[Khriss]

My bench today saw this finished , used to make hundreds of these when I was a kid and visiting Elvington near York , made me think can I still manage the fiddley bits with 50 yr plus eyes and white fingered hands ?? * gets airbrush out *  K

Edited September 14, 2020 by Khriss
Diorama entitled ' Which way to the nearest pub ' in memory of Nick Mills who drove his mates 1944 'Hellcat ' tank destroyer to the pub in Essex !

[Khriss]

And the real thing at Elvington near York,    parked up at the back where all the amazing historic planes from 100  years of the RAF are - was dads favourite place  when he was retired and ill . He was RAF Military Police . K

 

 

 

 

Edited September 14, 2020 by Khriss
120mm rifled gun scored longest distance kill in Gulf wars at @8 Km !