Removing TRV

[The Medway Handyman]

Trying to remove the head of a TRV
http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv001.jpg

but the black plastic bit won't unscrew, seems to have a roll pin or similar
holding it in
http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv002.jpg

Can't see a makers name anywhere, otherwise I'd ask them.

Anyone tell me what make it is? Or ideas on how to get the bugger off?

--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

[Harry Bloomfield]

The Medway Handyman was thinking very hard :

> Trying to remove the head of a TRV
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv001.jpg
>
> but the black plastic bit won't unscrew, seems to have a roll pin or similar
> holding it in
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv002.jpg
>
> Can't see a makers name anywhere, otherwise I'd ask them.
>
> Anyone tell me what make it is? Or ideas on how to get the bugger off?

I think you will find that the roll pin is an Allen grub screw.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

[The Medway Handyman]

Harry Bloomfield wrote:
> The Medway Handyman was thinking very hard :
>> Trying to remove the head of a TRV
>> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv001.jpg
>>
>> but the black plastic bit won't unscrew, seems to have a roll pin or
>> similar holding it in
>> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv002.jpg
>>
>> Can't see a makers name anywhere, otherwise I'd ask them.
>>
>> Anyone tell me what make it is? Or ideas on how to get the bugger
>> off?
>
> I think you will find that the roll pin is an Allen grub screw.

I did think that, but close inspection with a magnifying glass doesn't
reveal a hexagon. Seems circular, which lead me to believe its a pin of
some sort.

[Unknown]

The Medway Handyman wrote:
> Trying to remove the head of a TRV
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv001.jpg
>
> but the black plastic bit won't unscrew, seems to have a roll pin or similar
> holding it in
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv002.jpg
>
> Can't see a makers name anywhere, otherwise I'd ask them.
>
> Anyone tell me what make it is? Or ideas on how to get the bugger off?

Is it an older Danfoss TRV?

[Harry Bloomfield]

on 22/11/2009, The Medway Handyman supposed :

> I did think that, but close inspection with a magnifying glass doesn't reveal
> a hexagon. Seems circular, which lead me to believe its a pin of some sort.

I am CERTAIN that all of that particular make / model I have come
across had an Allen grub screw. A roll pin just would not work to hold
it in place. Try offering a small Allen key into the head.

[Tim W]

The Medway Handyman <davi...@nospamblueyonder.co.uk>
wibbled on Sunday 22 November 2009 20:33

> Trying to remove the head of a TRV
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv001.jpg
>
> but the black plastic bit won't unscrew, seems to have a roll pin or
> similar holding it in
> http://i99.photobucket.com/albums/l284/davidlang_photos/TRV/trv002.jpg
>
> Can't see a makers name anywhere, otherwise I'd ask them.
>
> Anyone tell me what make it is? Or ideas on how to get the bugger off?
>
>

Being lateral, do any of the black bits want to rotate by hand? My last ones
had a knurled black ring at the base that if rotated, locked and allowe
dthe head to be lifted off. Didn't look exactly like yours though, so
probably not helpful...

--
Tim Watts

This space intentionally left blank...

[The Medway Handyman]

Harry Bloomfield wrote:
> on 22/11/2009, The Medway Handyman supposed :
>> I did think that, but close inspection with a magnifying glass
>> doesn't reveal a hexagon. Seems circular, which lead me to believe
>> its a pin of some sort.
>
> I am CERTAIN that all of that particular make / model I have come
> across had an Allen grub screw. A roll pin just would not work to hold
> it in place. Try offering a small Allen key into the head.

Thanks Harry - I shall try an allen key. Maybe previous attempts at removal
have damaged the hexagon.

[Dave Liquorice]

On Sun, 22 Nov 2009 20:57:15 GMT, The Medway Handyman wrote:

> I did think that, but close inspection with a magnifying glass doesn't
> reveal a hexagon. Seems circular, which lead me to believe its a pin of
> some sort.

The split in a roll pin would visible on the end.

--
Cheers
Dave.

[YAPH]

On Sun, 22 Nov 2009 20:33:17 +0000, The Medway Handyman wrote:

> Anyone tell me what make it is? Or ideas on how to get the bugger off?

Clearly a job for the Angle Grinder :-)

BSF the old Danfoss-es used to have a cussed arrangement where you rotated
a plastic collet-type-thingy against spring-loading whilst pulling away at
the same time. Must say I don't recognise those Bar Stewards in your
photos, Dave, but Sod's Law, I'll come up against them myself in the next
week or so :-(

--
John Stumbles -- http://yaph.co.uk

The floggings will continue until morale improves

[Usenet Nutter]

Even through the fuzziness of that pic the "pin" does appear to have a
recess so probably is a grub screw .

[Andy Barron]

I still have some of these at home, I think they were made by Thorn or
at least some company beginning with 'T'.

Anyway they are definitely held on by grub screws, the older ones
actually had a plastic collar/clamp around them held with an ordinary
screw.

[Andy Barron]

I was talking B@ll@x, they are indeed old Danfoss TRVs.

[The Medway Handyman]

The Medway Handyman wrote:
> Trying to remove the head of a TRV

Thanks chaps. It will have an allen key inserted. "They don't like it up
em".