Swivel seat clunking noise as swivel

[Katies-travels]

Fiat Ducato swivel seat making a clunking noise when sitting on and swivel was slight noise when bought 5 yrs ago now getting worse any ideas.
i did see a post about removing plastic bumpers ?

 

[Lenny HB]

Is the main central bolt tight?
If that is the problem loosen it put some thread lock on the thread and retighten.

 

[Katies-travels]

Hi thankyou for your reply, is the central bolt accessible ?

 

[Lenny HB]

Should be a big nut under the centre of the seat.

 

[Katies-travels]

Thanks I’ll take a look

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[Katies-travels]

Hi there is no if but because it sits on round bearing about 300mm dia

 

[Lenny HB]

Hi there is no if but because it sits on round bearing about 300mm dia

What make seat and swivel are they?

 

[Katies-travels]

It’s on a Fiat Ducato 2016

 

[Lenny HB]

It’s on a Fiat Ducato 2016

It could be a Fiat, ISRI or Aguti, sounds like it may be a Fiat, if so I'm not familiar with them.

 

[Spriddler]

My seat (VW T4 base vehicle) rotates on a ring of maybe ten 1/2" dia steel balls, each retained by a 'hole' in a heavy steel plate (also about 300mm dia) which is attached to the underside of the seat. The plate is secured to the seat base by a threaded stud with a locknut. I had to remove the surprisingly very heavy seat completely (by removing the seat slider 'stops' and sliding it forward and off its runners/rails) to access the plate.
It's a frustrating job lining up the very heavy seat's 'feet' with and into the runners when putting the seat back.

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[Katies-travels]

Thanks for that sounds like a big job
Did you have to replace the bearings of grease up and did it solve the problem ?

 

[Spriddler]

Thanks for that sounds like a big job
Did you have to replace the bearings of grease up and did it solve the problem ?

My problem was not a clunking noise but that the seat slider mechanism was jammed and it wouldn't slide. I had put the job off for about 4 years!
TBH removing and replacing the heavy seat was a trial of strength and patience - manipulating the unwieldy seat was knuckle-scraping work, really needing two people but there's not enough room for two people to handle it, plus hidden or virtually inaccessible Allen-headed bolts and nuts dropping off into voids........(and I've been restoring classic vehicles as a hobby for 40 years).
Yours may be easier. Grease may help but you'll still have to get to the right place although as a wild guess I doubt that lack of grease is the problem as it is unlikely that the balls have become sufficiently 'dry' to make a clunking noise.
If the bearing plate is loose you will probably be able to rock/lean/wobble the whole seat back and forward and side to side.

 

[Tea Bag]

big nut under the centre of the seat.

Hi Lenny HB.
NOT the Big Nut behind the Wheel ?
Tea Bag

 

[M-J]

Should be a big nut under the centre of the seat.

You’re correct, I just looked and Donald Trump is under there.