How do I get this wheel off my radio tuner - UK Vintage Radio Repair and Restoration Discussion Forum

Emibell · 30th Mar 2020, 7:24 pm

I need to remove the wheel in the centre of the picture. It had two grub screws onto the shaft which I took out - that was hard enough! But now I can’t budge it. It looks like it is just pushed on to two flats on the shaft. Is it just fused on with age or is there some other fixing I’ve missed? It is really stuck!

paulsherwin · 30th Mar 2020, 7:31 pm

It won't be 'fused on' but it may well be stuck. Try applying some dismantling fluid such as Plus-gas, or apply some heat to the wheel boss.

You may be able to use a puller if you have access to a suitable one.

Emibell · 30th Mar 2020, 7:51 pm

Thanks Paul.

SiriusHardware · 31st Mar 2020, 12:17 am

If it's really stuck, consider something like a windscreen wiper / bearing puller like these examples:-

https://www.amazon.co.uk/Silverline-.../dp/B007Z9DG0A

https://www.amazon.co.uk/Adjustable-.../dp/B06ZYGX7PR

(The above were the first examples of the two types I had in mind - available from many other sources and sellers).

The main thing to consider is whether there is enough space between the wheel and the nearby surface for the 'claws' of the puller to slip underneath it.

Station X · 31st Mar 2020, 1:29 pm

Are those four axial screws visible on the front face of the "wheel"? If so removing them and leaving just the boss behind might make it easier to use a puller.

If it's possible to withdraw the shaft from the chassis, the assembly would be easier to work on.

vidjoman · 31st Mar 2020, 3:04 pm

Quote:

Originally Posted by Station X

Are those four axial screws visible on the front face of the "wheel"?

They look like moulding marks where the flywheel was cast.

Incidentally - the screw and nut on the nearest transistor look as though they are loose and should be tight.

Radio Wrangler · 31st Mar 2020, 7:19 pm

Diecasting ejector marks, I think.

A puller seems to be the only way to go, but the Mazak metal may have gone crumbly.
At worst, you may need to find a friend with a lathe, and a chunk of brass or steel to make a new flywheel

David

Emibell · 31st Mar 2020, 8:24 pm

Thanks for all replies, wheel still not budging but I haven’t spent much time on it.
Re. Screw on near transistor, yes it was loose thanks (but I hadn’t completely re-fitted them at this point).
Can’t get the shaft out due to string wrapped round it which I don’t want to mess with. Only need wheel off so that I can pull the back of the chassis down a bit more to get better access under pcb.
Will have to buy or devise a puller methinks.

TowerRadio · 31st Mar 2020, 8:52 pm

I would persist with the oil.Try wrapping masking tape where you have the blue stuff(several turns) then grip the shaft there with mole grips/parallel pliers.A slight to and fro action on the flywheel may be enough to get it moving.Les.

Richard · 31st Mar 2020, 9:00 pm

Personally I would start by locking a pair of mini Molegrips onto the shaft then try and twist the weight on the shaft, see if you can break its hold.

Richard

Goldieoldie · 31st Mar 2020, 9:05 pm

As Paul suggested use penetrating oil and heat
If you stand the unit it on its end and use something to form a well around the centre .
Fill with the oil and leave for a while .
Then use perhaps two soldering irons together to get to a high enough heat on the centre boss .
Cheers
Pete

poppydog · 31st Mar 2020, 9:17 pm

Quote:

Originally Posted by Richard

Personally I would start by locking a pair of mini Molegrips onto the shaft then try and twist the weight on the shaft, see if you can break its hold.

Richard

If there are no flats machined on the inside of the weight, I can't quite see any on the front of the wheel in pic, then Richard's suggestion is the way to go.

poppydog

BRASSBITS · 31st Mar 2020, 9:19 pm

Check that the shaft doesn't run in a nylon/plastic bearing before applying heat.

vinrads · 1st Apr 2020, 9:12 am

I hesitate to ask but why do you want to remove it ? Mick.

John10b · 1st Apr 2020, 1:02 pm

I didn’t like to ask, but I did wonder why.
John

Station X · 1st Apr 2020, 1:38 pm

The answer is/was here:-

Quote:

Originally Posted by Emibell

Only need wheel off so that I can pull the back of the chassis down a bit more to get better access under pcb.

ms660 · 1st Apr 2020, 1:49 pm

Sometimes the pressure of the grub screws forms a ridge on the shaft that's large enough to prevent easy removal of whatever it is the grub screws were fixing, might worth trying to lock the shaft with some mole grips and trying to rotate the wheel while at the same time pulling it, I used to rotate whatever it was that was stuck anti-clockwise.

Lawrence.

Outrun_uk · 1st Apr 2020, 2:25 pm

Quote:

Originally Posted by SiriusHardware

If it's really stuck, consider something like a windscreen wiper / bearing puller like these examples:-

https://www.amazon.co.uk/Silverline-.../dp/B007Z9DG0A

https://www.amazon.co.uk/Adjustable-.../dp/B06ZYGX7PR

(The above were the first examples of the two types I had in mind - available from many other sources and sellers).

The main thing to consider is whether there is enough space between the wheel and the nearby surface for the 'claws' of the puller to slip underneath it.

Never knew the wiper puller tool existed! Could have done with one of those a while back on a previous car

Techman · 1st Apr 2020, 3:42 pm

Quote:

Originally Posted by ms660

lock the shaft with some mole grips and trying to rotate the wheel while at the same time pulling it.

That's exactly the way to do it.

Avoid a puller - the main flywheel part looks like 'monkey metal', and could easily bust into several pieces!

vinrads · 1st Apr 2020, 5:53 pm

Nope ! I still don't get it why removing the flywheel would give you better access , removing the shaft as well maybe. Mick.

30th Mar 2020, 7:24 pm	#1
Emibell Tetrode Join Date: Jan 2016 Location: Shepperton, Surrey, UK. Posts: 91	How do I get this wheel off my radio tuner I need to remove the wheel in the centre of the picture. It had two grub screws onto the shaft which I took out - that was hard enough! But now I can’t budge it. It looks like it is just pushed on to two flats on the shaft. Is it just fused on with age or is there some other fixing I’ve missed? It is really stuck! Attached Thumbnails

30th Mar 2020, 7:31 pm	#2
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,947	Re: How do I get this wheel off my radio tuner It won't be 'fused on' but it may well be stuck. Try applying some dismantling fluid such as Plus-gas, or apply some heat to the wheel boss. You may be able to use a puller if you have access to a suitable one.

30th Mar 2020, 7:51 pm	#3
Emibell Tetrode Join Date: Jan 2016 Location: Shepperton, Surrey, UK. Posts: 91	Re: How do I get this wheel off my radio tuner Thanks Paul.

31st Mar 2020, 12:17 am	#4
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,560	Re: How do I get this wheel off my radio tuner If it's really stuck, consider something like a windscreen wiper / bearing puller like these examples:- https://www.amazon.co.uk/Silverline-.../dp/B007Z9DG0A https://www.amazon.co.uk/Adjustable-.../dp/B06ZYGX7PR (The above were the first examples of the two types I had in mind - available from many other sources and sellers). The main thing to consider is whether there is enough space between the wheel and the nearby surface for the 'claws' of the puller to slip underneath it.

31st Mar 2020, 1:29 pm	#5
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: How do I get this wheel off my radio tuner Are those four axial screws visible on the front face of the "wheel"? If so removing them and leaving just the boss behind might make it easier to use a puller. If it's possible to withdraw the shaft from the chassis, the assembly would be easier to work on. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

31st Mar 2020, 7:19 pm	#7
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,878	Re: How do I get this wheel off my radio tuner Diecasting ejector marks, I think. A puller seems to be the only way to go, but the Mazak metal may have gone crumbly. At worst, you may need to find a friend with a lathe, and a chunk of brass or steel to make a new flywheel David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

31st Mar 2020, 8:24 pm	#8
Emibell Tetrode Join Date: Jan 2016 Location: Shepperton, Surrey, UK. Posts: 91	Re: How do I get this wheel off my radio tuner Thanks for all replies, wheel still not budging but I haven’t spent much time on it. Re. Screw on near transistor, yes it was loose thanks (but I hadn’t completely re-fitted them at this point). Can’t get the shaft out due to string wrapped round it which I don’t want to mess with. Only need wheel off so that I can pull the back of the chassis down a bit more to get better access under pcb. Will have to buy or devise a puller methinks.

31st Mar 2020, 8:52 pm	#9
TowerRadio Hexode Join Date: Mar 2008 Location: Bristol, UK. Posts: 388	Re: How do I get this wheel off my radio tuner I would persist with the oil.Try wrapping masking tape where you have the blue stuff(several turns) then grip the shaft there with mole grips/parallel pliers.A slight to and fro action on the flywheel may be enough to get it moving.Les.

31st Mar 2020, 9:00 pm	#10
Richard Heptode Join Date: Feb 2003 Location: Garnant, near Ammanford, South Wales, UK. Posts: 657	Re: How do I get this wheel off my radio tuner Personally I would start by locking a pair of mini Molegrips onto the shaft then try and twist the weight on the shaft, see if you can break its hold. Richard __________________ BVWS member.

31st Mar 2020, 9:05 pm	#11
Goldieoldie Octode Join Date: Jul 2014 Location: Petersfield, Hampshire, UK. Posts: 1,043	Re: How do I get this wheel off my radio tuner As Paul suggested use penetrating oil and heat If you stand the unit it on its end and use something to form a well around the centre . Fill with the oil and leave for a while . Then use perhaps two soldering irons together to get to a high enough heat on the centre boss . Cheers Pete

31st Mar 2020, 9:19 pm	#13
BRASSBITS Hexode Join Date: Dec 2018 Location: Sheffield, South Yorkshire, UK. Posts: 364	Re: How do I get this wheel off my radio tuner Check that the shaft doesn't run in a nylon/plastic bearing before applying heat.

1st Apr 2020, 9:12 am	#14
vinrads Dekatron Join Date: Feb 2009 Location: Chesterfield, Derbyshire, UK. Posts: 3,762	Re: How do I get this wheel off my radio tuner I hesitate to ask but why do you want to remove it ? Mick.

1st Apr 2020, 1:02 pm	#15
John10b Nonode Join Date: Nov 2016 Location: Aberaeron, Ceredigion, Wales, UK. Posts: 2,884	Re: How do I get this wheel off my radio tuner I didn’t like to ask, but I did wonder why. John

1st Apr 2020, 1:49 pm	#17
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: How do I get this wheel off my radio tuner Sometimes the pressure of the grub screws forms a ridge on the shaft that's large enough to prevent easy removal of whatever it is the grub screws were fixing, might worth trying to lock the shaft with some mole grips and trying to rotate the wheel while at the same time pulling it, I used to rotate whatever it was that was stuck anti-clockwise. Lawrence.

1st Apr 2020, 5:53 pm	#20
vinrads Dekatron Join Date: Feb 2009 Location: Chesterfield, Derbyshire, UK. Posts: 3,762	Re: How do I get this wheel off my radio tuner Nope ! I still don't get it why removing the flywheel would give you better access , removing the shaft as well maybe. Mick.