| Author | Message | ||
     Avery Wise New User Username: hans3 Post Number: 23 Registered: 08-2017 |
On both an SY and SZ I've observed my under-floorpan spare tire tray lowering itself (via vibration on the screw rod) in just a few hundred miles, if that. Is there a TSB or preferred means for keeping the screw rod under more tension? I suppose a sufficiently large lock washer could suffice. | ||
| David Gore Moderator Username: david_gore Post Number: 3744 Registered: 04-2003 |
Avery, I would be looking for the source of the vibration to eliminate the cause rather than trying to stop the retaining screw self-undoing. I would be concerned about future problems lowering the spare wheel when needed associated with the use of high-torque retention. I would be looking at the following areas for the cause: 1. Out-of-balance wheels or tyre tread separation. 2 Misaligned drive shafts due to self-levelling system not functioning/coil spring misalignment/spring bottom retainer corrosion. 3. Worn Detroit trunnions [swap sides if they are still in their original delivery locations]. 4. Worn wheel bearings [most difficult replacement] . | ||
| michael vass Frequent User Username: mikebentleyturbo2 Post Number: 682 Registered: 07-2015 |
Hi Avery Add to David's list 5 bad spheres, hard suspension Mike | ||
| Avery Wise New User Username: hans3 Post Number: 24 Registered: 08-2017 |
Thanks for the replies but there's no discernible vibration or abnormal vibration in the car--the car rides fine. I have to presume it's some sort of subtle vibration that's causing this well-oiled rack screw to turn on its own. There's no secondary retaining mechanism for the screw (by design), hence my question regarding TSBs or improvisations. | ||
| Robert J. Sprauer Frequent User Username: wraithman Post Number: 628 Registered: 11-2017 |
TSB's are on the Bentley Heritage site. | ||
| David Gore Moderator Username: david_gore Post Number: 3745 Registered: 04-2003 |
I had this problem for a short period of time with DRH14434 which had been fitted with Avon tyres in the UK before shipment to Australia - fixed by having all wheels dynamically balanced and adjusting the rear ride height control settings so the drive shafts were horizontal at all times. | ||
| Trevor Hodgekinson Experienced User Username: wm20 Post Number: 187 Registered: 11-2006 |
To stop bit falling off vintage motorcycles the usual trick is to put an O ring under the fasteners if they are applying a critical load. In theory the tyre should be damping out the vibrations | ||
| Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 2338 Registered: 09-2004 |
In theory the tyre should be damping out the vibrations Only if it is the correct size and inflated correctly. |
