Author Topic: NEB Engineering Belt Drive  (Read 4262 times)

Offline DazSeaton

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NEB Engineering Belt Drive
« on: 26.01. 2012 21:00 »
Well I didn't expect that. Just removed the primary drive cover and half a cupful of oil came out. Thing is, it's got a NEB engieering belt drive conversion. I was under the impression the chain case should now be dry!! Although saying that, the reason I am dismantling is a severe oil leak from the gearbox final drive. Didn't think it would leak into the chain case though.

Wondering if someone could help me out. Has anyone got the installation instructions for the NEB engineering belt drive they could send me? Would be much appreciated. (That's if such a thing exists).

Also whilst the chain case is off is it an easy job to replace the engine main bearing oil seal? Might as well do that whilst its in pieces?
I have read the Haynes book of lies and it states its best to get the 61-3362 clutch sleeve extractor. is this good advice?

Any good advice appreciated. Cheers!
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
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Re: NEB Engineering Belt Drive
« Reply #1 on: 27.01. 2012 14:11 »
The oil in your case probably came from the engine.  Replace the seal while you're in there.
Joe
1961 Super Rocket
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2009 Harley Electra Glide Classic
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Southern Illinois, USA

Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #2 on: 27.01. 2012 19:22 »
The oil in your case probably came from the engine.  Replace the seal while you're in there.
Joe

just had the engine srocket off and it does look like it came from the engine rather than the gearbox (which is a newish seal due to the belt drive conversion). Am I right in saying once i get the back of the chain case off its just a matter of prising out the main crankshaft oil seal?
cheers
Darren
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
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Offline muskrat

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Re: NEB Engineering Belt Drive
« Reply #3 on: 27.01. 2012 19:34 »
G'day Darren, you don't need to remove the inner primary cover to get at the seal. Behind the cush & pully is a spacer that the seal works on. I use a magnet to pull it out then the seal is easy to replace.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #4 on: 27.01. 2012 19:49 »
G'day Darren, you don't need to remove the inner primary cover to get at the seal. Behind the cush & pully is a spacer that the seal works on. I use a magnet to pull it out then the seal is easy to replace.
Cheers
Ah right, the spacer was the last thing I took off (it's bloody freezing in the garage). that must be the seal behind it. Got to get the rear case off anyway to replace the final drive seal on the gearbox :O(
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
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Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #5 on: 27.01. 2012 19:54 »
Anyone know the best way to remove the inner clutch wheel?. It has two threaded holes which i inserted two bolts but didnt want to overtighten them and damage the edge of the outer wheel oil seal which is just behind them. I can't get my hub puller into the large holes. The woodruff key has disappeared well into the hole.
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Offline muskrat

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Re: NEB Engineering Belt Drive
« Reply #6 on: 27.01. 2012 20:08 »
#9 on the pic is the spacer I meant.
Can't help with the clutch, don't know how those ones are held on.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline muskrat

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Re: NEB Engineering Belt Drive
« Reply #7 on: 27.01. 2012 20:22 »
Doh missed the pics.
You need a puller to attach by bolts into the threaded holes and work against the shaft.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

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Re: NEB Engineering Belt Drive
« Reply #8 on: 27.01. 2012 21:05 »
Hi Daz,
You need to get or make a puller which will press on the Centre shaft of the gearbox  *ex* *ex*
NOT against the pulley wheel !!
A 2 legged puller with slots for the legs will be good then some suitable bolts instead of the puller legs will screw into the threaded holes in the clutch centre,
Here is a link to a good one,

http://sykes-pickavant.com/Portals/0/PDFs/Pullers/Pullers%202011/Pullers%20&%20Separators%20-%20Thin%20Jaw%20Gear%20Pullers%20&%20Kits.pdf

I have the 08600000 pullers which I find very useful!! I have made a couple of special legs for it to remove the crank timing gear

Please post some photos of the rest of the NEB when you have it removed?

Regards
John O R
1961 Super Rocket
1963 RGS (ongoing)

Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #9 on: 27.01. 2012 21:55 »
thanks guys, have an incling thats what i would need to cobble together.
cheers.
darren
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
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Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #10 on: 27.01. 2012 22:03 »
Hi Daz,
You need to get or make a puller which will press on the Centre shaft of the gearbox  *ex* *ex*
NOT against the pulley wheel !!
A 2 legged puller with slots for the legs will be good then some suitable bolts instead of the puller legs will screw into the threaded holes in the clutch centre,
Here is a link to a good one,

http://sykes-pickavant.com/Portals/0/PDFs/Pullers/Pullers%202011/Pullers%20&%20Separators%20-%20Thin%20Jaw%20Gear%20Pullers%20&%20Kits.pdf

I have the 08600000 pullers which I find very useful!! I have made a couple of special legs for it to remove the crank timing gear

Please post some photos of the rest of the NEB when you have it removed?

Regards
John O R

will do John, thanks for your help.
Darren
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
2007 Suzuki Bandit 1250 SA

Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #11 on: 08.02. 2012 22:37 »
Hi Daz,
You need to get or make a puller which will press on the Centre shaft of the gearbox  *ex* *ex*
NOT against the pulley wheel !!
A 2 legged puller with slots for the legs will be good then some suitable bolts instead of the puller legs will screw into the threaded holes in the clutch centre,
Here is a link to a good one,

http://sykes-pickavant.com/Portals/0/PDFs/Pullers/Pullers%202011/Pullers%20&%20Separators%20-%20Thin%20Jaw%20Gear%20Pullers%20&%20Kits.pdf

I have the 08600000 pullers which I find very useful!! I have made a couple of special legs for it to remove the crank timing gear

Please post some photos of the rest of the NEB when you have it removed?

Regards
John O R


John,
Heres the photos as promised
1. is of the pulley bracket i made up. worked brilliantly.
rest are photos of the belt drive as promised.
Darren
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
2007 Suzuki Bandit 1250 SA

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Re: NEB Engineering Belt Drive
« Reply #12 on: 09.02. 2012 00:17 »
Hi Darren,
Many thanks for the photos  *smile*
Since you last posted I was doing a little research into the belt drive setup on a T120 that I am working on
I think that it has a Hayward setup fitted??
Anyway a "Google" brought me here!!

http://www.britcycle.com/manuals/hayward_belt_drive_hints_and_tips.htm

This recommends oil in the primary if the outer case is fitted, it can run dry if the primary case is missing or well ventilated (kinda logical really  *eek* *eek*)
Basically the belt can overheat in a closed atmosphere!!!!
I had not heard of that before
Soooooo! maybe some oil in the NEB setup is in order ???? ???? ???? ???? ???? ???? ???? ???? ???? ????

CONFUSED *ex* *ex*
John O R
1961 Super Rocket
1963 RGS (ongoing)

Offline DazSeaton

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Re: NEB Engineering Belt Drive
« Reply #13 on: 09.02. 2012 13:48 »
Hi Darren,
Many thanks for the photos  *smile*
Since you last posted I was doing a little research into the belt drive setup on a T120 that I am working on
I think that it has a Hayward setup fitted??
Anyway a "Google" brought me here!!

http://www.britcycle.com/manuals/hayward_belt_drive_hints_and_tips.htm

This recommends oil in the primary if the outer case is fitted, it can run dry if the primary case is missing or well ventilated (kinda logical really  *eek* *eek*)
Basically the belt can overheat in a closed atmosphere!!!!
I had not heard of that before
Soooooo! maybe some oil in the NEB setup is in order ???? ???? ???? ???? ???? ???? ???? ???? ???? ????

CONFUSED *ex* *ex*
John O R

Huh!?!? Oil on a belt?? sounds a bit dodgy to me. In fact motor manufacturers recommend changing drive belts if contaminated with oil!
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
2007 Suzuki Bandit 1250 SA

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Re: NEB Engineering Belt Drive
« Reply #14 on: 09.02. 2012 14:42 »
Darren,
Different material completely !!!

John
1961 Super Rocket
1963 RGS (ongoing)