HW100 air leak

[Scrinja]

There are 10 o rings in a HW100 regulator any one of them failing will give you an air leak Buddy
Repeated below from the WOC is the list of o rings

Here's the full list of factory O-rings and some recommended alternatives All O-rings are NBR 70 unless otherwise stated.


O-ring HW 100, 37.1 x 1.6 Cylinder clamp 2682C
O-ring HW 100, 15.6 x 2.5 Barrel clamp 2682B
O-ring HW 100, 32 x 2.5 (or BS#124) Magazine 2603A*
O-ring HW 100, 13 x 2 Adaptor A 2704
O-ring HW 100, 2.57 x 1.78 Adaptor B 2703B

O-ring HW 100, 3 x 1.5 (PTFE) Valve stem 2655D
O-ring HW 100, 12 x 1.2 Breech block main (12 x 1) recommended 2658
O-ring HW 100, 5.5 x 1 Breech/probe seal .22 2659A*
O-ring HW 100, 4.5 x 1 Breech/probe seal .177 2659A*
O-ring HW 100, 4 x 1.5 Probe buffer 2618A*
O-ring HW 100, 2.57 x 1.78 (PUR70) recommended Main valve inlet 2665D
O-ring HW 100, 7 x 1.5 Main valve outlet 2666
O-ring HW 100, 2 x 2 Main valve internal (2.57 x 1.78) recommended N/A
O-ring HW 100, 7 x 1.5 Regulator piston 2668
O-ring HW 100, 10 x 1.5 Tension adjuster (sometimes omitted) 2672
O-ring HW 100, 8 x 1.5 Barrel 2679

The only one missing is the 14 x 1.5 where the main valve assembly screws up inside the Reg block insert inside 2673 (Later quick fill models)

[krisko]

i feared that someone will bring that list in. completely useless.

you end up with loads of spare excess, surplus to requirements.

where is the fill probe o ring size on it.
where is the o ring size of the one which is in the quick fill port which causes the cylinder to slow leak?
where is the o ring listed which is inside the cylinder sealing endcaps.

I am not even convinced the german would use the non metric on the brass nipple, it does work but is it the right one?

he has already replaced the 1.78 o ring.

wondering if your barrel screw is not too long, than maybe the cylinder is not going all the way deep in, or as i said can be a scratch in the area where the small o ring seals agains.
try to get a second cylinder to test in the gun.
or the insert or the brass flying saucer bit unscrewed and not seated deep enough. did you change the 14 o ring?
if the gun is so old/without maintenance. Perhaps the main inlet valve o ring also failed, thats the one which seals/shuts with the piston and the ball bearing seats into. If that is not closed maybe other o rings also let 200bar pass them instead of the usual 80-90bar.

[Scrinja]

The OP has already stated his leak is coming out from one of the holes underneath the valve block !!
dependant on which hole the air is coming out of it will be one of 5 o rings that needs replacing 3 required for the hole nearest the cylinder 2 for the other
All of them are in the useless list Buddy

where is the fill probe o ring size on it.
where is the o ring size of the one which is in the quick fill port which causes the cylinder to slow leak?
where is the o ring listed which is inside the cylinder sealing endcaps.

None of the above is relevant as he does not have a leak from the cylinder if he did they are all available on the WOC if you care to look

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