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Author Topic: Fuel tank waterdrains/sump drains??  (Read 3006 times)

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Offline speedbird1

  • Posts: 549
  • Country: us
Fuel tank waterdrains/sump drains??
« on: Sunday March 24, 2013, 16:33:29 UTC »
Hi Guys,

Does anyone know the part number for the fuel tank drains??  Otherwise known as sump drains.  This is for a UK produced machine.

My parts book does not seem to show them, or age has got my eyesight as well??

Speedbird1.

Offline Nigel Stevens

  • Moderator
  • Posts: 245
  • Country: fr
Re: Fuel tank waterdrains/sump drains??
« Reply #1 on: Sunday March 24, 2013, 17:06:47 UTC »
The standard drain plugs are numbered 4PT  123, with a stores reference of 26AE/1411. Is that what you want or are you looking for the details of mod H 311 which introduced Vickers type A5268 Mk B valves as an optional change?
Nigel

Offline speedbird1

  • Posts: 549
  • Country: us
Re: Fuel tank waterdrains/sump drains??
« Reply #2 on: Sunday March 24, 2013, 17:28:10 UTC »
Thank you Nigel,

One of the aircraft record cards shows that all modifications up to H339 were incorporated in 1991, with a few exceptions that does not include H311, so I guess I have the Vickers valves??  Now to find one or two as i have one that weeps now and again especially when full??

Many thanks.

Speedbird 1.

proplover

  • Guest
Re: Fuel tank waterdrains/sump drains??
« Reply #3 on: Monday March 25, 2013, 22:32:08 UTC »
Before you rush out and spend lots of cash just make sure the weep isnt due to something as simple as a worn\perished seal - I had a weepy one and it cost me 10p to fix :-)

Offline speedbird1

  • Posts: 549
  • Country: us
Re: Fuel tank waterdrains/sump drains??
« Reply #4 on: Monday March 25, 2013, 23:26:16 UTC »
Thanks Proplover,

I have just been quoted a sum similar the the Cyprus bail out for one, and it is the only one, so I may be looking for where I can find the "O" ring to fix what I have??

Regards & Thanks,

Speedbird 1

Offline Biggles2

  • Posts: 59
Re: Fuel tank waterdrains/sump drains??
« Reply #5 on: Sunday April 07, 2013, 20:43:58 UTC »
I,d say the Cyprus bail out one possibly has a perished rubber, sorry eraser, oh no, O - ring !! Find a 10p new ring. :-D

Offline speedbird1

  • Posts: 549
  • Country: us
Re: Fuel tank waterdrains/sump drains??
« Reply #6 on: Sunday April 07, 2013, 21:26:34 UTC »
Thanks Biggles,

I found that the "O" ring from a standard Cessan/Piper Curtis drain fitted well and did the job.  You were correct the old one was as hard as a rock and came off in pieces.

Speedbird 1.

proplover

  • Guest
Re: Fuel tank waterdrains/sump drains??
« Reply #7 on: Monday April 08, 2013, 10:59:09 UTC »
Problem solved! Simples!!

Offline Dick Gower

  • Posts: 302
  • Country: au
Re: Fuel tank waterdrains/sump drains??
« Reply #8 on: Friday April 26, 2013, 04:31:28 UTC »
And if anyone needs to make an adaptor, the thread on the 4PT 123 is 11.5 TPI Whitworth form.  I have forever wondered why!
Dick Gower
Melbourne,
Australia.

Offline john henderson

  • Posts: 276
  • Country: gb
Re: Fuel tank waterdrains/sump drains??
« Reply #9 on: Friday April 26, 2013, 07:41:14 UTC »
I believe it is a BSP fitting - British Standard Pipe thread pitch and angle!
john h

Offline Dick Gower

  • Posts: 302
  • Country: au
Re: Fuel tank waterdrains/sump drains??
« Reply #10 on: Friday April 26, 2013, 12:36:44 UTC »
There is 11 and a half  TPI in the US NPT threads but is there one in the BSP range John?  Must take a look.

When I imported mine it had the 4PT.123 plug wirelocked in place and I had to make an adaptor to take a Curtis drain valve before it could be certified here hence the dim recollection that it was an odball thread.

Regards,
Dick Gower
Melbourne,
Australia.

Offline p51aba

  • Posts: 3
  • Country: gb
Re: Fuel tank waterdrains/sump drains??
« Reply #11 on: Thursday December 06, 2018, 19:32:05 UTC »
Does anyone have the Part Number for the rubber O Ring seal on the fuel tank drains? They are the Vickers type Push to drain type, introduced by Modification H311. The required seal is part of the valve (internal seat of the valve) and not the aluminium crush washers that seal the valve to the tank sump.

Thank you. Kind regards, Bryan

 

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