Author Topic: TS Main Bearings  (Read 3129 times)

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Offline carcrank

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TS Main Bearings
« on: 06 Oct 2010 at 07:17 »
As the motor is completely apart or should I say nearly apart.  I'm not sure how to remove the main bearings from the case. Also are they a standard bearing and would it be possible to use a sealed one to help keep the oil in.

Offline MRD

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Re: TS Main Bearings
« Reply #1 on: 06 Oct 2010 at 08:15 »
Hi Carcrank
The bearings are as follows:-
Drive side- 20mm x 52mm x 21mm if you go to bearing factors quote the number 4304 (sorry I cant remember the make)
Timming side 20mm x 52mm x 12mm with a number of 6304

Unfortunately the Douglas club have run out and are in the process of obtaining some for stock.
Regards       Martin

Offline kmd

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Re: TS Main Bearings
« Reply #2 on: 06 Oct 2010 at 08:28 »
Hi Carcrank
When buying the bearings make sure that they are metal cages not resin ones.
Regards
Kevin

Offline carcrank

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Re: TS Main Bearings
« Reply #3 on: 06 Oct 2010 at 09:22 »
Thanks Martin & Kevin
I'll go down to our local bearing bloke and get/order them tomorrow, any hints on removal?

Regards

Mark

Offline Chris

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Re: TS Main Bearings
« Reply #4 on: 06 Oct 2010 at 10:59 »
Hi Mark
    The bearings often come out with the crankshaft. If they remain in the crankcase halves then warming the cases is usually sufficient to allow them to drop out when tapped down firmlyonto a flat surface, preferable wood or something that is not going to damage the faces. In extreme cases it has been known to be necessary to drill a couple of small holes in line with the outer ring of the ball races so that a pin punch can be used to persuade their release. This should be a last resort and is not usually necessary. Chris.

 

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