I'm sure I have one of these citroen "Bungs" in a box of sphere plugs. I now understand how they work. The bung is threaded so the gas adapter can lock down onto the sphere, with no other means of compression.
The original filling plugs are shear bolts, so after the sphere is full, the bolt is tightened until it shears off, leaving just the plug.
I can't see any reason the bungs you have couldn't be re-used, they will need loosening and possibly a new O ring. A lathe and milling machine and you could make them for peanuts.
Wanted: Sphere Pressure Tester
-
- Global Moderator
- Posts: 14454
- Joined: Thu Jun 18, 2009 6:44 pm
Re: Wanted: Sphere Pressure Tester
91 3.0 sei M. 4852 EXY Black
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
Prev
90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
Prev
90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White
- White Exec
- Citroen God!
- Posts: 6642
- Joined: Fri Mar 11, 2011 7:38 pm
- Orga / RP numbers: RP7165
1996 2.5TD saloon, Exclusive, Polar White
1992 BX19D Millesime, Sable Phenicien - Location: ex-Ealing, Cheshire, W.Sussex & Surrey. Now living in Sayalonga (Malaga, Spain)
Re: Wanted: Sphere Pressure Tester
?? No signs of shear on any on the OE plugs I have. All are smooth sides and top, with just a few lines from where the stilson I used remove them.Dieselman wrote:The original filling plugs are shear bolts, so after the sphere is full, the bolt is tightened until it shears off, leaving just the plug.
O-rings:
These 2.62mm Viton items produce a more positive nip-seal to the sphere surface than the OE and Valprex items:
https://www.polymax.co.uk/catalogsearch ... q=BS110V75.
Has been written up before.
Chris
1996 XM 2.5TD Exclusive RP7165 Polar White
1992 BX19D Millesime RP5800 Sable
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998..2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001..2003
1996 XM 2.5TD Exclusive RP7165 Polar White
1992 BX19D Millesime RP5800 Sable
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998..2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001..2003
-
- Global Moderator
- Posts: 14454
- Joined: Thu Jun 18, 2009 6:44 pm
Re: Wanted: Sphere Pressure Tester
Look at enough bongs and you will see ones with the shear there, not properly ground off. It may be that newer ones have a different method of gripping the bung, but I doubt it because, as you have noted, it leaves marks.White Exec wrote:?? No signs of shear on any on the OE plugs I have. All are smooth sides and top, with just a few lines from where the stilson I used remove them.Dieselman wrote:The original filling plugs are shear bolts, so after the sphere is full, the bolt is tightened until it shears off, leaving just the plug.
Shear bolts are commonly used for single use bolts on cars, such as steering locks.
91 3.0 sei M. 4852 EXY Black
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
Prev
90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
Prev
90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White
-
- Citrobics expert
- Posts: 547
- Joined: Wed Apr 15, 2009 10:00 am
Re: Wanted: Sphere Pressure Tester
Here's a few more pictures of the valves as requested:



That's me recharged 4 of the 6 spheres on the CX now, the main accumulator, brake accumulator and both front spheres, there's no room to regass the rear spheres in situ and to get the sphere off you have to remove the whole strut so that was a job for another day.
David.



That's me recharged 4 of the 6 spheres on the CX now, the main accumulator, brake accumulator and both front spheres, there's no room to regass the rear spheres in situ and to get the sphere off you have to remove the whole strut so that was a job for another day.
David.
'98 Xantia Activa V6 
'00 XM V6 Exclusive
'12 C6 3.0 HDi Exclusive
'15 C4 BlueHDi Feel

'00 XM V6 Exclusive
'12 C6 3.0 HDi Exclusive
'15 C4 BlueHDi Feel