Crankshaft play end and maximum tolerance

freefly103 · Jun 17, 2016

See this video:

https://www.youtube.com/watch?v=ZRXKC9Yxfug

Its not a stuck crank nut, but the principle and process is the same.

Matt Spencer · Jun 17, 2016

Alternately use a SIX POINT socket , 1/2 ( or 3/4 ) Drive ,

Crankshaft play end and maximum tolerance

and a mallet

and get a baboon like in the video to PUSH the BAR securely , while you clout it .
a Good RING SPANNER would be o.k. ,
Untill youd used a hammer on it .
Pays to maintain a set of ASSEMBLY Tools , and use older ones when inflicting brute force , as theyll stretch .

PROBLEM is Going To Be LOCKING the Shaft . If youve Got a Big 12 or 15 in cresent , itll Go On the Hex Alt. shaft though .
Then Youll Need SIX Hands .

or grind a bit of the hex to fit a existing C spanner

So you tend to use the Od Boot , scrap iron , Piece of lumber etc , as Props , or to BOOT the SPANNER .

pierodn · Jun 17, 2016

Hi.
I have already removed the rotor nut and the trotor steel bush and key!!!!!
I asked some advice for the gearbox mainshaft that doesnt turn circular but retort.
Please, read my precedent question.
Ciao
Piero

Matt Spencer · Jun 17, 2016

Oh Dear .

Well, it did not turned very circular but spinning retort as if it were wrong the gearbox mainshaft (or perhaps failed the bearing).
So I think I should replace or gearbox mainshaft and/or the bearing.

Oh Dear .

Yes , Mainshafts probably BENT , May even be cracked , Radialy . I which case it would SHEAR .

As This would / could be unhealthy ; A NEW Mainshaft - or unbent replacement .
The Bearings likely to be custard also . Inexpensive so replace anyway .

Free and Washed , rotating is likly Not Even .

A Close Inspection of the Gears . Particularly the one it was in , 2nd? 3rd ? when the drama occured would be advisable .

It is Also possable to BEND or Break the Layshaft . Bent it will loosen the bearing in the case .

You would be wise to remove and fully dismantle & inspect Ea Component of the Transmisson .

You Have D T I 's & a plate of Glass ?

Bernhard · Jun 17, 2016

pierodn said:
Hi.
I cannot unscrew the rotor nut, neither with pneamatic gun!
It seems well melted ith the rotor steel spacer.
Can i fire the nut and try again with the air compressed gun?
Ciao
Piero

The alternator may have melted its self onto the thread, in that case you need a blow torch to heat up the nut and something like a Villers Hammer spanner and a 2 lb club hammer;

http://thevintagetoolco.com/index.php?m ... cts_id=149

lcrken · Jun 17, 2016

Hi Piero,

regarding the sprocket runout, I think you have assessed it correctly. You have either a bent mainshaft or worn output bearing, or both. The only way to be sure is to disassemble the gearbox and inspect. Good luck with getting the bike back on the road as soon as possible.

Ken

pierodn · Jun 17, 2016

Hi Ken,
i will replace the msinshaft and the bearing and all the other parts will be necesssry.
But i cannot understand as a mainshaft/clutch chainwell that turn retort can caused the melted rotor/stator.
Ciao
Piero

jaydee75 · Jun 17, 2016

Piero,
Can you translate another word for "retort". I don't think we know exactly what you mean.
Jaydee

pierodn · Jun 18, 2016

jaydee75 said:
Piero,
Can you translate another word for "retort". I don't think we know exactly what you mean.
Jaydee

Hi.
I would say that the shaft doesnt spin circular but irregularly.
Ciao
Piero

gortnipper · Jun 18, 2016

pierodn said:
jaydee75 said:

Piero,
Can you translate another word for "retort". I don't think we know exactly what you mean.
Jaydee

Click to expand...

Hi.
I would say that the shaft doesnt spin circular but irregularly.
Ciao
Piero

Eccentric

Off-center

Out of round

pierodn · Jun 18, 2016

gortnipper said:
pierodn said:

jaydee75 said:

Piero,
Can you translate another word for "retort". I don't think we know exactly what you mean.
Jaydee

Click to expand...

Hi.
I would say that the shaft doesnt spin circular but irregularly.
Ciao
Piero

Click to expand...

Eccentric

Off-center

Out of round

Yes,
chose you one pf the three words, mean the same for me.
Ciao
Piero

pierodn · Jul 28, 2016

Hi.
New gearbox main shaft and bearing and seal.
New inner chain case.
New alternator studs and nuts and washers.
New primary chain.
New clutch center bearing.
New crankshaft spacer and shims.
New Lucas rotor.
New keys crankshaft and rotor.
New rotor nut and spring washer.
New Lucas one phase stator.
New Podtronics power box one phase with capacitor into.
0,20/0.25 mm air gap all around between rotor and stator.
Primary chain 5 mm loose up and down that turns regular.
The chain sprocket turns regular.
200 cc 20W50 oil into the primary cover.
The bike rides great and the battery charges.
I have some Commando, all rebuilt from me, all they run great without any problem.
But this, that is my favourite bike, breaks whenever I use it for long distances
And now, What will happen the next time?
Ciao
Piero

Crankshaft play end and maximum tolerance

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