Lower spherical joint

9 posts / 0 new
Last post
Limitless
Limitless's picture
Offline
Last seen: 12 hours 27 min ago
Joined: 17/04/2014
Lower spherical joint

Maybe a noob question but does this need any servicing in the way of greasing?

Thanks in advance. Thumb Up

SM25T
SM25T's picture
Online
Last seen: 47 sec ago
Joined: 17/04/2014
No. Sealed bearings. No rollers or balls. Grease would attract dirt to stick.
Nick Chan
Nick Chan's picture
Online
Last seen: 1 min 39 sec ago
Joined: 17/04/2014

Its still an idea I believe to check them from time to time to make sure they move freely but as SM25T states, they are maintenance free.

Nick

Bricol
Online
Last seen: 3 min 27 sec ago
Joined: 17/04/2014

And I'm stunned to still find both of mine are in good working order, 19 years and 50,000 miles on crap roads later in all weathers, with several years of no garaging . . .

Limitless
Limitless's picture
Offline
Last seen: 12 hours 27 min ago
Joined: 17/04/2014

Thanks to all, I did wonder if they were sealed. It's a far cry from my old Triumph Spitfire trunnions...thank God! Clap

Geoff Brown
Geoff Brown's picture
Offline
Last seen: 11 hours 45 min ago
Joined: 17/04/2014

Just a regular external clean with a light application of WD40 (other similar products are available) to keep the crud down.

Beware - they do wear but I think it is due to how the suspension is set up & the duress they come under - constant track driving etc.

If all wheel bearing play has been eliminated the easiest way to check  for wear - if you are nimble - is to raise the front of the car up, place one hand at the top of the tyre (12:00) & the other at the bottom (18:00) but with the palm far enough inboard for the middle finger to touch the bearing. Then try to move the wheel in & out vertically if there is any play your finger will know!

Otherwise have an assistant 'wobble' the wheel while you inspect the bearing. 

 

DJ.
DJ.'s picture
Online
Last seen: 4 min 41 sec ago
Joined: 17/04/2014

That sounds a good tip, thanks Geoff Smile

Duncan

Bricol
Online
Last seen: 3 min 27 sec ago
Joined: 17/04/2014

As an industrial specifier and user of such devices, this is pretty standard advice from suppliers of this type of bearing:

 

Lubrication of Steel-On-PTFE Spherical Plain Bearings

For steel-on-PTFE lined (fabric or composite) spherical plain bearings, there should not be any additional lubrication added. Any lubrication of the sliding contact surfaces could disturb the internal self-lubricating properties and shorten bearing life. Therefore, lubrication of these bearings is not advisable.

 

 

blueyedbiker
blueyedbiker's picture
Offline
Last seen: 5 hours 20 min ago
Joined: 17/04/2014

Very superior garage floor, most impressive.