Author Topic: Sludge traps and pistons  (Read 2155 times)

Offline PDMiller

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Re: Sludge traps and pistons
« Reply #45 on: 25.10. 2018 08:06 »
Sometimes in life you just know how something is going to be and I would have bet my a£$e that there wouldn't be a ball bearing, and of course there wasn't,or a spring either. What was there was a long grub screw going nearly to the bottom of the hole and partially blocking the drilling through to the main bearing. 
Looks like your A65 mod might've been done John as the hole seems to have been enlarged to about 5/16" meaning there's no step to act as a seat. There's no spring or ball either but that's just par for the course.
I'm wondering what rhymes with mittens *whistle*.Maybe we could re write the whole song using motorbike components *smiley4*

Offline Swarfcut

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Re: Sludge traps and pistons
« Reply #46 on: 25.10. 2018 08:52 »
 Pete ...Well done for keeping at it.  As a bit of light relief, a little ditty.

           Crankshafts and pistons, oil pumps and gaskets,

           Bikes that you buy, delivered in baskets,

           Bent frames and forks with rusty old springs,

           These are a few of my favourite things.

            There you are GB, see what else gets added.


         Swarfy.

Offline PDMiller

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Re: Sludge traps and pistons
« Reply #47 on: 25.10. 2018 10:48 »
Swarfy! I'm impressed at your artistic talent. A man who can write lyrics and fix motorbikes must be a rare thing. Any chance of a YouTube video with a live performance? 😎

Offline Topdad

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Re: Sludge traps and pistons
« Reply #48 on: 25.10. 2018 11:28 »
next verse ,not as good but .....

boring bars, inline reamers with bushes and bearings,

pistons that fit and camshafts that spin

these are a few of my favorite things
" rules are made for the guidance of wise men and the blind obediance of fools"
United Kingdom

Offline Swarfcut

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Re: Sludge traps and pistons
« Reply #49 on: 25.10. 2018 12:46 »
   Sorry folks, bit busy for YouTube. Doing the North Face of the Eiger later today.

   Topdad is on the money, just needs a little addition...

    Boring bars, reamers,  bushes and bearings,

    Pistons that fit, old  fibreglass fairings,

     Camshafts that spin, to give the old bike some wings,

     These are a few of my favourite things.

     Swarfy.

Online Greybeard

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Re: Sludge traps and pistons
« Reply #50 on: 25.10. 2018 13:05 »
Pete, I am so very sorry about this *red* ! Maybe this forum needs a poetry/song section. Admin, would you be so kind as to split and move all this silliness to the Off Topic folder. Ta.

Offline Topdad

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Re: Sludge traps and pistons
« Reply #51 on: 25.10. 2018 14:21 »
Boo hiss ! Ok I'll go stand in the corner  *sad* *sad*
" rules are made for the guidance of wise men and the blind obediance of fools"
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Offline PDMiller

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Re: Sludge traps and pistons
« Reply #52 on: 25.10. 2018 16:57 »
Genuine Smith's chronometric tachometer,
Nice Moore and Wright old imperial micrometer.
I phone up the dealer and his till goes KERCHING,
These are a few........................

I've been humming that b£**&y tune all day. *whistle*

Maybe Greybeard had let the genie out of the bottle. So much frustrated talent. Men in sheds doing oily things but dreaming of fame and fortune  *yeah*


Offline Swarfcut

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Re: Sludge traps and pistons
« Reply #53 on: 25.10. 2018 17:19 »
 Pete, back to reality.

   Just compared Julian's pukka conversion with what you have.  Yours looks a good copy. The pump output feeds into the crankcase as normal. The grub screw you found blocking the oilway means no supply to the roller bearing, as we would expect. The threaded bar, if it is hollow, would mean an oilway leading down to  the extra hole in the crankcase, where the oil could be fed by some means to the end of the crank. If your arrangement is the same as Julian's, there should be a similar oilway drilled from this junction to the pressure relief valve, which is isolated from the back of the roller bearing by the blanking grub screw.
  If I am right, you are a good way towards finishing this conversion, and also have a means of checking the oil pressure by a gauge plumbed in where the small blanking plug enters that junction.

   Nice addition to the song.....
 

  Swarfy.

Offline PDMiller

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Re: Sludge traps and pistons
« Reply #54 on: 25.10. 2018 18:39 »
Yes that sounds exactly right. There is a drilling from the relief valve housing to what I think is a dowel hole in the crankcase, the threaded pipe from the pump discharge side leads to the same hole. as you say the blanking plug on the drilling leading to this hole would make a take off for a pressure gauge. the only thing that's missing is whatever takes oil to the end of the crankshaft.
I've blanked off all the extra drillings including the one in the crankshaft in a way that they could be returned to this state if need be in the future should I come across the crankshaft feed arrangement.
Still searching for the A65 anti sumping mod, I'm fairly sure it's been done but they left out the ball and spring.

Stripped the oil pump today and nothing broken, worn out, or missing  *wave* *loveit*. Also the new pistons and sludge trap blanking plugs arrived. All is well in my little corner of geordie land tonight. Tomorrow may be different. :!

Online groily

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Re: Sludge traps and pistons
« Reply #55 on: 03.03. 2019 17:59 »
No poetry here (sorry!), and not the oily bits either this time - but jeez - all sorts of things can happen when cranks are full of shite  . . . here's one small element of the rebuild requirementof a major let-go on a Trihard twin  . . . 'just cruisin' along at 55mph I was  . . . and then this happened'  . . . Crank, rods, barrel, all sorts of sundries, and this. Bloody hell.
Bill

Offline Swarfcut

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Re: Sludge traps and pistons
« Reply #56 on: 03.03. 2019 18:36 »
Ignition System

 Magneto... Typical

 Exploded Diagram Showing Major Components.

   In the style of Haynes..." Reassembly is simply the reversal of the dismantling procedure."

 Swarfy.


 Additional.... How are the rider's vital parts?    Looks  a very  spectacular way to have a bad day.!

Online groily

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Re: Sludge traps and pistons
« Reply #57 on: 03.03. 2019 21:53 »
Nice one Swarfy!

Owner's vitals intact (- according to his wife, after close inspection). Pain is concentrated in the lower regions nonetheless - of the pocket.
Spectacular demolition job, indeed it is. Just glad it's not mine!
Bill