I have purchased a Weihrauch HW100s .177 30J 9 (used) , I am filling it with the MK4 Hills Pump and I noticed after filling it up to 200 bars it drops very slightly. The manometer needle drops by about 1mm or 2mm within 2 or 3 days. I presume that it could be a slight leak. its bullseye accurate at 20m
Who is the accredited technicians/ specialists for Weihrauchs in Pretoria.
Protea FT Team '19
SAFTAA FT Colours '15
The Sultan of Spring 2017
If you leave it for, say, 6 days does it drop even more? If so, then yes it's leaking.
If not I'd put it down to the (massively compressed) air in the cylinder getting warm and registering a higher pressure on the gauge. If it REALLY bothers you, fill the rifle to 205bar.
If it is leaking, chat to Wyan Schoonwinkel (he's wyan on this forum.) He's in PTA, very capable, and can probably help you out.
I filled it to just a little over 200 bar on 20 Jan and today (31 Jan) its on 190 bar...probably need to chat to Wyan.
Thank you Mark,
dunk the breech block in a bowl of water and you will see where the bubbles are coming from. then we know which seals to change... head over to POK sticky thread on weihrauch forum. lots info there on leaking HW100
helped me sort mine out. is not difficult, but you must follow logical process.
this will get you started..
HW100 tweaks - Weihrauch Owners Club