| Author | Message | ||
     Barry Brears Experienced User Username: turney_2009 Post Number: 39 Registered: 8-2009 |
G'day All,The electric front passenger seat has never worked since I've had SBH17291 Bentley T1.So I stripped the motor cleaned up the commutator dressed up brushes (can't get new brushes locally)tested the motor alls well it worked fine.I then bolted it up to the seat mechanism and the armature siezed it would not turn.I checked the drivers side to make sure I had bolted it up correctley and the bush which fits around the spindle was in the correct way.I also checked with a cordless drill and bit to see if the worm gear was moving freely by placing the bit on slot at the end of the worm gear and it was so applyed plenty of WD40 and tried again,alas it wouldn't move.Can anyone help? | ||
| Peter Talbot Experienced User Username: squerryes Post Number: 31 Registered: 7-2010 |
Barry - I think the seat actuator motors to your Bentley T1 are the same as those in my 1986 RR Spirit - I had similar problems. Just to confirm your situation: I gather you've cleaned up the motors and they work fine BUT: is this just on the test bench or are you using the inbuilt multi-function seat position control switch in the car? If not used, this switch can (a) get sticky or (b) needs its contacts cleaned up 'cos they get fouled by either corrosion or just ages of dirt. Next on: I think, if I undersood you right, - you've applied torque via a cordless drill to the seat drive mechanism as a trial substitute for the seat motor and the seat moves. My experience would suggest that you have an alignment issue so try this: 1. Make sure the motors work under control of multi-function switch 2. Ensure that seat mechanisms work when torque applied 3. Conect up motors to seat mechanism but leave securing bolts only part done up so the two are real floppy. 4. Give it a try (helpful to have two of you for this), determine best alignment, then tighten bolts slowly - testing frequently that all still works. Worked for me, hope it works for you Regards, Peter | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 635 Registered: 6-2006 |
Hi Barry, Peter's mechanism is different, but 3. Connect up motors to seat mechanism but leave securing bolts only part done up so the two are real floppy. Or hold on with hand pressure. If you hold (stall) the motor, will it still be able to spin? Try swapping the motors. Good Luck. | ||
| Peter Talbot Experienced User Username: squerryes Post Number: 32 Registered: 7-2010 |
Barry I think Paul is kind of agreeing with my earlier posting, albeit I've got it a bit wrong, that it's an alignment problem. Keep us updated please. As a side issue - I can get real confused with Posting Times as living in the UK it's now just coming up to 9.55pm on Thursday 5th August !! H.G.Wells really knew something about time travel. Peter | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 636 Registered: 6-2006 |
Peter I wasn't kind of agreeing with you Grrrr I was agreeing with you. Probably alignment  Also - sometimes the motors will spin happily when not under load but do not have sufficient starting torque to get things moving from stop. It's a tricky one to check though. (Watch your fingers!) | ||
| Peter Talbot Experienced User Username: squerryes Post Number: 33 Registered: 7-2010 |
Paul Abject apologies my mistake, please forgive me. I take your point re free off load spin and on load lack of adequate starting torque from stop. I'll have a think on how best to resolve this one. Peter | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 637 Registered: 6-2006 |
No need for apologies - just having a laugh ;) | ||
| Bill Coburn Moderator Username: bill_coburn Post Number: 1265 Registered: 4-2003 |
Hmm. All this talk about censoring the internet! I have just received a moan from Barry via email about time travel and time zones via-a-vis the UK and OZ but it still hasn't hit this forum! Anyway Barry, YOU should complain, what about this poor colonial who has to wait until nearly bedtime to send requests to UK suppliers for bits or insults to Paul Yorke and by that time after my medicinal glasses of red and my fingers of single malt I am anybody's. But I struggle through the haze and so far have survived. I often boast that I can get parts from London quicker than I can from Melbourne (the OZ one that is). | ||
| Barry Brears Experienced User Username: turney_2009 Post Number: 40 Registered: 8-2009 |
Now now boys and girls lets have a bit of decorum.Yes alignment seems to be the problem but now the motor is coughing and f====rting so have spotted a second hand one on ebay for 35 quid (gosh hav'nt said quid for a long time)by all accounts it goes came out of a SS so should fit my Bentley.This forum is great seems to operate 24/7 because of time zones. Barry | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 638 Registered: 6-2006 |
Bill you are quite right , as usual, about the time zones. In these modern days, with electric lights and computerisation it is no longer necessary. Fair enough it was important when we sent you guys over there, but now you should fall into line and just join GMT. Sorted, none of the waiting to place orders or having to wait to be insulted back. ;) Of course another bonus is being able to raise your glass to the sunrise without anybody batting an eyelid! | ||
| Peter Talbot Experienced User Username: squerryes Post Number: 34 Registered: 7-2010 |
Paul I had appreciated your humour - that's why my apology was couched in ironic terms. Must agree with you about universal use of GMT, especially in the far off Antipodes populated by the descendants of miscreants. Closer to home: a great pity that guy Offa didn't dig his ditch deeper to better keep out the tiresome Welsh. Having exchanged pleasantries, back to the issue in hand - seat motors: This is just a thought, haven't had time to try it out yet. If all motors spin freely under no-load conditions but some stall under load conditions, there is an implied difference in the available power input converted to output torque. Put simply, it doesn't take much power to spin up a motor under no-load conditions so a low power input would have little obvious effect but put on a load and a motor with a low power input just doesn't have the guts to actuate the seat mechanism from a standing start. Suggestion: set up each motor (no-load) sequentially on the test bench with an ammeter in line, apply 12 volts, measure and record current. Disconnect from 12 volt supply, measure and record resistance using an ohmmeter (most amp/volt meters have this facilty). The recorded reading should be reasonably similar for all motors tested, except that the one which stalls under load may differ. Explanation: if there is a partial discontinuity or fault in the motor windings, leading to an increased electrical resistance, there would be a concomitant reduction in available input power. Peter | ||
| Peter Talbot Experienced User Username: squerryes Post Number: 35 Registered: 7-2010 |
Addendum to above: The above presumed the fault might be in the motor but I failed to appreciate the implications of Paul's suggestion to swap motors around. It could be that there is nothing the matter with the motor but that there is a fault in the wiring loom leading to an increased electrical resistance in the supply circuit with resultant voltage reduction so: measure voltage supply to ? defective motor and compare with that to functional motors / just switch motors around and see what works. Barry - £35 for a secondhand motor, which you don't know if it's in working order, sounds steep. You can get a brand new one from Flying Spares for £50 + VAT. Peter | ||
| Barry Brears Experienced User Username: turney_2009 Post Number: 41 Registered: 8-2009 |
Peter,I checked Flying Spares website and none were listed,so then I checked Introcar and there price for a reconditioned motor was 155GBP so I thought that FS would be about the same price.In hindsight I should have emailed FS for a quote,but it is now too late as I have commited myself to the SH on Barry | ||
| Barry Brears Experienced User Username: turney_2009 Post Number: 46 Registered: 8-2009 |
Hi Thanks to everyones input the second hand motor I bought on Ebay for 35 quid works so all is well once more,now for the next problem re hanging the exhaust,never a dull moment at this house. Barry | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 650 Registered: 6-2006 |
Good job Barry |
