The Triumph Dolomite Club - Discussion Forum

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PostPosted: Thu Oct 11, 2018 8:42 am 
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Hi all,
I have a mis-match in my propshaft centre bearing and the mounting brackets. The bearing fitted has the mounting lugs level with each other, which mean it should be mounted using 2 brackets 156985.
BUT the 2 brackets I have are 159396.... suitable for bearings with the offset (one high, one low compared to the 3-9 centre line)

Anyone got 2 156985 brackets spare?
They are the ones with the holes like this:

Image


For reference the ones I have are like this:

Image

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PostPosted: Thu Oct 11, 2018 7:41 pm 
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Not sure what you're getting at here Sam!

ALL centre bearings i've seen have lugs level at the centre line, the Sprint prop gets its offset by rather unhandily mounting 1 lug above the bracket and the other below. The first time I saw this, I thought someone had made a cock up, but it's correct! All others, well the OHV cars at least, have BOTH lugs on the centre bearing fitted ABOVE the brackets.

156985 is given as the part number for Toledo and Sprint in my parts lists so probably fits just about all Dolomites, don't know what the other one is for!

Think I have a spare pair, will check tomorrow in daylight!

HTH Steve

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2 door '73 Toledo with Vauxhall Carlton 2.0 8v engine OWF 797M (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 45 years and home of Maverick Triumph.PM for more info or quotes.


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PostPosted: Thu Oct 11, 2018 8:06 pm 
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Thanks Steve, I have the application c brackets shown here: http://cdn.triumphowners.com/wp-content ... pshaft.pdf
I have 2 different centre bearings on different props, 1 equal at 3-9 the other with offset mountings as per c (unfortunately not usable)

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PostPosted: Fri Oct 12, 2018 9:48 am 
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Quote:
Thanks Steve, I have the application c brackets shown here: http://cdn.triumphowners.com/wp-content ... pshaft.pdf
I have 2 different centre bearings on different props, 1 equal at 3-9 the other with offset mountings as per c (unfortunately not usable)
If i've read the drawing right, then the brackets you have are correct for your car, "Dolomite", ie pre facelift 1850, with auto trans which is probably why i've never seen one before! It's obviously not a general auto thing, as the 1500 auto I broke recently was built up as per app A with 156985 brackets. The purpose seems to be to displace the bearing to the right of the centre line, God knows why, it's probably to do with avoiding harmonics! And nothing to do with the offset.

I rather fancy you will struggle to find a NOS OFFSET bearing these days, but I have successfully fitted 3-9 bearings in offset Sprint applications, so I don't see why you shouldn't be able to get away with it too. Ditch the spacers from the O/S bracket (app C WH0809) and assemble as per app B using the app C brackets and 3-9 bearing and see how you get on! But first, get the prop balance checked by a competent specialist! No amount of faffing about with fittings like this will help if the prop is out of balance!

Steve

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2 door '73 Toledo with Vauxhall Carlton 2.0 8v engine OWF 797M (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 45 years and home of Maverick Triumph.PM for more info or quotes.


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PostPosted: Fri Oct 12, 2018 9:53 am 
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Without the spacers on the OS you can't fit the prop. Either the captive nut or the bolt head fowls the body. Hence me trying to source the other brackets.
Spare prop assembly. Is going to dunning and fairbank in Hunslet on Monday for rebuild and balance.

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PostPosted: Fri Oct 12, 2018 10:51 am 
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Location: Highley, Shropshire
Quote:
Without the spacers on the OS you can't fit the prop. Either the captive nut or the bolt head fowls the body. Hence me trying to source the other brackets.
Spare prop assembly. Is going to dunning and fairbank in Hunslet on Monday for rebuild and balance.
Yeah, that makes sense! But there MUST be some way to make it work! If they made special brackets, just for that one model, they must have had a good reason, not just to give us bother 40 years down the line! My bet is that the cars were developing harmonic vibrations from having the prop TOO much in a straight line (don't laugh, it CAN happen) and rather than displace it vertically, which might affect the rear section adversely, they chose to go to one side. So it would probably be counterproductive to go against the design. How about if you keep the spacers and go 3-9 and app A? Maybe stretch the spacers with a flat washer or 2?

I can still look for the 156985 brackets for you, but I think it might drop you out of the frying pan and into the fire to use them!

Steve

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2 door '73 Toledo with Vauxhall Carlton 2.0 8v engine OWF 797M (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 45 years and home of Maverick Triumph.PM for more info or quotes.


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 Post subject: Aye,....
PostPosted: Wed Oct 17, 2018 6:55 pm 
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Are you sorted yet Sam?

I have found a propshaft centre mounting outer ring (that has become detached from the rubber)
complete with two of they brackets. It is off a '74 Sprint.

If you still need the brackets please PM me your contact details,
but please note I am unlikely to be able to post until Monday.



thanks,

Ian.

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