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Indian 500 bullet mainshaft bearing

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Indian 500 bullet mainshaft bearing
Started at 11:48am on the 2nd November, 2017 by mart
mart Subject: Indian 500 bullet mainshaft bearing
1995 500 Indian Bullet: what is the best way to fit the g/box mainshaft bearing please? fit the bearing to the shft first or fit the bearing to the case first? thanks in advance
Posted: 11:48am 2nd November, 2017
Mark M Subject: Indian 500 bullet mainshaft bearing
Fit bearing to case first. Put it in the oven (get it as clean as you can first or there will be a lot of smoke!) and cook it at 250* for about 20 minutes. Put the bearing (wrapped in plastic to prevent rust) in the freezer the night before. With the case hot and the bearing cold it should just drop in but use the layshaft sleeve as a mandrel to guide it in, apart from anything else, you'll need it to keep your hands away from the hot case.

REgards, Mark
Posted: 12:06pm 2nd November, 2017
mart Subject: Indian 500 bullet mainshaft bearing
thanks Mark- forgot to say the case is still in the frame so I assume I could warm it with a blow torch? (after removing carb and tank) i have some Nomex oven gloves which are perfect for handling hot engine cases etc.
Posted: 12:42pm 2nd November, 2017
Mark M Subject: Indian 500 bullet mainshaft bearing
Of course you can. I suggested oven because I normally do bearing replacement when the box or engine are apart. I use an oven for even heating and time saving, once the component is in the oven I can just leave it while I do something else. Just make sure you heat the area evenly, gentle to start, play the torch all around then build up heat steadily. Once it seems hot enough a gentle tap from the outside to see if the bearing moves, if not keep heating. Once it's out get the torch back on to bring up to temp again before attempting to fit the new bearing as the alloy case will cool quickly.

REgards, Mark
Posted: 12:53pm 2nd November, 2017
mart Subject: Indian 500 bullet mainshaft bearing
can the gearbox case be removed from the frame without removing the engine? ta
Posted: 01:39pm 2nd November, 2017
vince Subject: Indian 500 bullet mainshaft bearing
Hi, The gearbox can be removed separately but is a bit fiddly realigning the bolts on assembly. if you need to heat gearbox in the frame, try pouring boiling water over it to get temperature up then apply blowlamp. Vince
Posted: 02:06pm 2nd November, 2017
Mark M Subject: Indian 500 bullet mainshaft bearing
Boiling water may be a bit messy! A hot air paint stripper gun is a good tool to get some warmth in to start with. Advantage to getting the case out is that you can do the phosphor bronze layshaft bush at the same time, if your mainshaft bearing is worn out the bush will probably be not far behind.

REgards, Mark
Posted: 02:23pm 2nd November, 2017
mart Subject: Indian 500 bullet mainshaft bearing
thanks for the good advice. I think Ill ltake the case out- itll be much easier in the long run. Im only replacing the bearing as it came out with the shaft. the bearing was very tight on the shaft
Posted: 05:58pm 2nd November, 2017
Mark M Subject: Indian 500 bullet mainshaft bearing
Mart, that's a bit of a worry, it might suggest the bearing has been spinning in the case in which case the housing will have become oversized and your new bearing may not be tight enough to resist turning as well. If I was you I'd go ahead as planned and see how tight the fit on the new one is once it's all cooled down. If it is a bit loose then Loctite Bearing Fit will solve the problem. This is not unknown on Enfields of all varieties, the gearbox is quite poorly designed and weak in this area. It's usually more of a problem on the higher powered models, Bearing Fit gets a lot of use on interceptor boxes for instance, guess how I know!

REgards, Mark
Posted: 06:47pm 2nd November, 2017
martyn15 Subject: Indian 500 bullet mainshaft bearing
thanks for the info- ive fitted the bearing no problems and assembled the 'box'- but the high gear pinion and high gear kickstart pinion dont mesh fully. please have a look at this pic- the gearbox cover fits on OK and the kick start mech. engages OK. (Ive changed my username from mart to martyn15) https://ibb.co/gjdxk6 as always many thnanks
Posted: 10:41am 27th November, 2017
martyn15 Subject: Indian 500 bullet mainshaft bearing
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Posted: 10:48am 27th November, 2017
Tim NZ Subject: Indian 500 bullet mainshaft bearing
In service the mainshaft is located inside the end cover bearing, ie to the right.
You may simply be in a situation where the shaft (and its gears) and all sitting too far to the left?
If you have had the High gear pinnion dog off, make 100% certain that it has gone back onto the shaft the right way around, or you will be able to engage 3rd and 4th gears simultaneously!
Death!
Posted: 07:09pm 27th November, 2017
martyn15 Subject: Indian 500 bullet mainshaft bearing
thanks Tim - the shaft is torqued up at the clutch end with no thread protruding past the nut itself, so I think the shaft itself is OK. i was wondering if the small high gear pinion has been pushed too far onto the shaft? is this possible? the dog engages correctly and all the other gears in the box line up fine. cheers
Posted: 07:51pm 27th November, 2017
Tim NZ Subject: Indian 500 bullet mainshaft bearing
I am not sure I understand how you are assembling the gear box???
The sleeve gear is retained by the gearbox sprocket and nut. Is that the nut you are referring too?
If you insert the mainshaft and all is associated gears into place in the casing, the mainshaft will be positioned too far in, and you will have issues with not being able to rotate the gear cluster.
The fitting of the oil slingers either side of the inner cover bearing are pulled up onto both sides of the bearing when you tighten the LH thread nut at the end, effectively drawing the main shaft back out of the gearbox to align all gears.

If you dummy preassemble both shafts and gear sets onto the inner cover (which is from where the gears and shaft are aligned and spaced out from) you will then be able to see if you have any gear alignment issues.
Dont loose the layshaft thrust washer inside the end of the Kstart!!!
Posted: 10:01pm 27th November, 2017
martyn15 Subject: Indian 500 bullet mainshaft bearing
thanks Tim I was referring to the nut on the inner shaft that holds the clutch on. Ill try the dummy assembly as you suggest
Posted: 01:24pm 28th November, 2017
martyn15 Subject: Indian 500 bullet mainshaft bearing
it all lines up now- thanks
Posted: 10:50am 4th December, 2017

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