Front wheel bearings

[mtnbkr01201]

Hi everyone
Just a quick question, I have a 73 TR7RV, has any one here ever replaced your front wheel bearings with 'Timken' bearings ?, if so - would you know what the Timken number would be ?.

Thank you

Bill G.

 

[grandpaul]

Don't really need a number if you can measure it carefully. They are not high tolerance spec, as far as I know. O.D., I.D. and width...

 

[garbln]

The numbers on the old bearings will interchange with new ones at any good bearing supply house. I used sealed bearings to replace the open ones on mine.

 

[mtnbkr01201]

Hi Guys
Being that my bike is my only source of transport, I was really just hoping to pull the old ones out and replace them on the spot with the new bearings, to do that would require the numbers ahead of time, I can get the bearings where I work, Timken is the only brand of bearing we carry.

Bill G.

 

[otherwise]

They look like 6205's from a very quick Google

http://cgi.ebay.com.au/ws/eBayISAPI.dll?VISuperSize&item=180925413514
http://www.ebay.com.au/sch/sis.html...el Motorcycle Spoke Kit &_itemId=170682892257

Search about and confirm this and then do a Timken conversion, all too easy.

 

[mtnbkr01201]

They look like 6205's from a very quick Google


http://www.ebay.com.au/sch/sis.html?_nkw=Triumph T140 Front Wheel Motorcycle Spoke Kit &_itemId=170682892257

Search about and confirm this and then do a Timken conversion, all too easy.

That one right there may just do the trick, the numbers on the bearings were quite clear, now I just need to make sure there the right ones for my bike, easy to figure with the dimensions.
This may save me several steps.

Thank you

Bill G.

 

[garbln]

I'll go out to the shop in the morning, I MAY have the old ones laying around out there and will get the numbers.

 

[mtnbkr01201]

I'll go out to the shop in the morning, I MAY have the old ones laying around out there and will get the numbers.

Thank you, that's quite kind of you, there were three other numbers on that bearing, I'll let the guys at work see what they can come up with as well (6205 2AS or 5).

Bill G.

 

[otherwise]

Thank you, that's quite kind of you, there were three other numbers on that bearing, I'll let the guys at work see what they can come up with as well (6205 2AS or 5).

Bill G.

Those other numbers probably relate to shielded and or clearances, 6205 is the size. For front wheel bearings any will do as long as long as they are 6205. Personally I'd use shielded if available.

 

[garbln]

Hmmm, my bearings were 6204's, well one was anyway. According to my parts catalog the right and left were different on the front. The back was the same on both sides. I went out this morning and found all four (old) bearings, 3 6204's and one marked 205. It looks like you may need two different sizes for the front, a 6204 and a 6205 of one configuration or another, the 05 is a larger ID and OD. I changed the bearings out on my 73 this spring because the bike had sat for a long time and the axles had rusted in place so I had to pound them out. The bearings looked OK but with all the side force put on them I decided to replace them just to be safe. I do remember one was different but I couldn't remember witch one.

Good luck!

 

[mtnbkr01201]

I hope your wrong about the two different sizes, I have two Timken bearings #205 FF on their way to my shop for the morning, my parts book for calls for #70-1070 for the left and right side, I'll find out tomorrow.
BTW, the FF at the end of the Timken numbers are related to the seal on the side of the bearing, #205 F would be sealed on one side, 205 FF - sealed on both sides.

 

[otherwise]

I hope your wrong about the two different sizes, I have two Timken bearings #205 FF on their way to my shop for the morning, my parts book for calls for #70-1070 for the left and right side, I'll find out tomorrow.
BTW, the FF at the end of the Timken numbers are related to the seal on the side of the bearing, #205 F would be sealed on one side, 205 FF - sealed on both sides.

I always take double sealed, then when I actually look at the job if I find open is a better option I just pop the seals off, all too easy.
Wheel bearings don't have to be close tolerance but seals on the outside usually are a good thing to keep water and dirt out. The other argument is seals can keep the water in.

 

[mtnbkr01201]

I always take double sealed, then when I actually look at the job if I find open is a better option I just pop the seals off, all too easy.
Wheel bearings don't have to be close tolerance but seals on the outside usually are a good thing to keep water and dirt out. The other argument is seals can keep the water in.

I totally agree on the seals both sides, and always have, unless I know the bearing was meant to be in a fluid bath of some kind.

 

[garbln]

In one of my manuals it tells you to replace the open ones with sealed ones when needed. Apparently the factory switched over at some time.

 

[CarlS]

In one of my manuals it tells you to replace the open ones with sealed ones when needed. Apparently the factory switched over at some time.

Good information

 

[avion]

If I can jump in here....

For eg 6205, that number depicts the size as gp mentioned earlier.
Numbers after that will depict the dust covers for that bearing.

If your bike uses additional seals on the outside of the bearing, I would run an open bearing or just remove the dust seals on the bearing.
Pack it full of your chosen grease.

When replacing the bearings always replace the seals too. Nine times out of ten you damage the seals getting to the bearings.

hth

 

[mtnbkr01201]

In one of my manuals it tells you to replace the open ones with sealed ones when needed. Apparently the factory switched over at some time.

I have several manuals, the Triumph shop manual has a note = Early models were fitted with bearings of the non-sealed type. Always fit bearings of the latest sealed type when servicing.

 

[mtnbkr01201]

I think an update is in order.
I did indeed find that the bearings are two different sizes, the O.D. is the same both sides, the I.D. shaft hole is smaller then the Timken 205FF, that makes it a 204FF for the right side.
What I noticed and didn't really care for was the fact that not only did the bearings not have any seals - but on the inside was a hollow in the hub where all the grease on the inboard side went, that side should have a seal 'minimum', sealed both sides would be good but I see as not a necessity as there really no place for the grease on the outbound side to go.
The bearings were quite loose and the grease was no longer grease per say,.
I also found the job the be relatively easy WITHOUT any special tools.



Thank you for everyone's guidance and help, especially Sir garbln.
All very good info.

Bill G.
An Irishman on a Limey

 

[CarlS]

Very good. Thanks for the detailed update.

 

[mtnbkr01201]

Very good. Thanks for the detailed update.

Your very welcome, all of you here.