Hi,
I am currently rebuilding my 83 sprite. Got tired of bodywork to decided to strip the engine. Could not find any issues with it so started on gearbox. I can see a ball race from above and it appears that the bearing cage is broken, it is partly there but there are ball bearing rolling around the bearing casing without a cage.
I have no experience of mini gearboxes and i am assuming this is not right. Having just watched a video of a gearbox rebuild they call this the "third motion bearing".
Do these fail and break up?
I will take a photo tomorrow to show you all.
The rest of the engine is almost prefect, I am wondering if the car was taken off the road due to this gearbox failure.
Any opinions gratefully received.
Neil
Gearbox Bearing Question
Started by
nrwilliams
, May 31 2011 09:42 PM
5 replies to this topic
#1
nrwilliams
-
- Noobies
-
- 133 posts
Mini Mad
- Location: Uckfield, East Sussex
Posted 31 May 2011 - 09:42 PM
#2
bmcecosse
-
- Members
-
- 9,699 posts
Crazy About Mini's
- Local Club: http://www.srps.org.uk/
Posted 31 May 2011 - 09:44 PM
Yes - if the cage is broken it needs a new bearing......
#3
yeti21586
-
- TMF+ Member
-
- 3,724 posts
He's A Lumberjack And He's OK
- Name: Chris
- Location: Hampshire
- Local Club: None
Posted 31 May 2011 - 09:52 PM
is the bearing on the diff? and does it look like this??
if it is the big bearings either side on the diff and they look like mine above then yes they are fubard
YetI
if it is the big bearings either side on the diff and they look like mine above then yes they are fubard
YetI
#4
AndyMiniMad.
-
- Members
-
- 3,295 posts
Up Into Fourth
- Location: Under The Bonnet.
Posted 31 May 2011 - 10:39 PM
While your at the gearbox its a good Idea to replace the main shaft double roller bearing. They can fail in the same way, causing an awfull whine. Might be as well to change the baulk rings to.
#5
Guess-Works.com
-
- Traders
-
- 19,838 posts
Gearbox Guru
- Local Club: Rugby Classic Mini Owners Club
Posted 01 June 2011 - 06:30 AM
I hope it was my video's you were looking at 
http://www.guess-wor...m/Tech/Rebuild/
and yes double rollers or 3rd motion bearings do fail, however, during production the bearing change from a full steel bronze bound bearing, which are very strong but noisy, to a cheaper 3/4 steel and a fibre/plastic binding, and then back to a full steel nylon/plastic binding in which are the ones currently available. The 3/4 steel variations are the most likely to break up.
When purchasing a double roller ( or any bearing for that matter ) don't be tempted by cheap unbranded versions, it's false economy. Brands to look for... RHP, SKF, Torrington, Timken and made in the EU.
http://www.guess-wor...m/Tech/Rebuild/
and yes double rollers or 3rd motion bearings do fail, however, during production the bearing change from a full steel bronze bound bearing, which are very strong but noisy, to a cheaper 3/4 steel and a fibre/plastic binding, and then back to a full steel nylon/plastic binding in which are the ones currently available. The 3/4 steel variations are the most likely to break up.
When purchasing a double roller ( or any bearing for that matter ) don't be tempted by cheap unbranded versions, it's false economy. Brands to look for... RHP, SKF, Torrington, Timken and made in the EU.
Edited by Guess-Works.com, 01 June 2011 - 06:37 AM.
#6
nrwilliams
-
- Noobies
-
- 133 posts
Mini Mad
- Location: Uckfield, East Sussex
Posted 01 June 2011 - 02:31 PM
Thanks for the responses.
Its not the diff bearing but it does look like the photo you have posted. The race is broken.
And yes guess works it was your video
)
More expense!)
Its not the diff bearing but it does look like the photo you have posted. The race is broken.
And yes guess works it was your video
)More expense!
)
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
