I've got two HW90'S a 1990 and 2005 version, nice easy guns to work on,I took the piston of my MK1 HW90 in.22 to a machine shop to get it worked on and fit two delrin bearings fitted front and back, It was a bit of a experiment and wasn't sure if it would work for it being a gas ram, but 2000 shots later it is absolutely a pleasure to shoot, I also took the interia weight out of the gas ram and fitted a green Aussie seal to it and upgraded the Schrader valve, its set to 11.5ftlbs and smooth and accurate to shoot, they are great rifles.
Really good video of how to remove the cocking arm & axis pin. I would like to know if you could do a video on how to properly insatll & set a Weihrauch cocking Lever Axis Pin. I would like to do this to an HW80 & also an R10 I have. Thank You for the quality videos.
Hi Geoff, Thank you for posting your video. I found it very interesting and informative. May I ask please, is the HW90 a good air rifle to buy and have? There's plenty of good reviews on them and they seem well liked. How reliable is the air system? Do they retain their air? If they are well looked after, are they still prone to air leaks? Are the older ones better than the newer ones? I'm considering buying one, though theyre heavy and I have a 97K and an 80. Im not sure what I would be gaining? I like the fact they can be left cocked, only if I missed a shot. If you have any advice, I would be grateful. By the way, that's a beautiful vice you have there. Ive seen similar on the gunsmith stands at the Shooting Show in Birmingham. I think they come from the aircraft industry, or thats what I was told. A beautiful piece of kit. Thank you Geoff, best wishes. Ian.
Thanks for a great video, Geoff. I have a question that you may well be able answer. I have recently been given one of these rifles and it's strange that when I break it open there's a dead section and the cocking lever doesn't engage with piston until its about a third of the way into the cocking stroke. It may have been short stroked but if the cocking lever pin is put into the hole nearer to the action the rifle will not cock which leads me to think there are two variations of piston and that I need a longer cocking lever. Have I got a 12 ft lbs piston with an fac spec cocking lever or an fac piston that's been short stroked with a piston head adapter? The rifle's serial number indicates it was made circa 2000 and produces 10.3 ft lbs on the chrono with JSB RS in .22cal.
Nicely presented demo, thanks. Out of interest, is that dummy piston, the stationary bit at the back, hollow? That would indicate about a compression ratio of around 2:1 if it is.
EXTREEEEEMLY useful video Squire👌 Me & my 90 have been together now for well over 20 years & NOT once has she ever cheated on me! it was love at first sight! She looks great around the house but really knows her way around the garden if you know what I mean 😏lol ! was already a hottie at 10 years old 😬when I bought her and has always been brilliant but I'm sure she's lost some of her umff 😔 I've heard you can stick a footpump round the back😏 or do I have to get a slim Jim in for her? Also do you know the psi for legal limit again I'd heard 300 but idk ? Anywayzzz a great vid & very happy to see! a fellow Brit instead of a yank! ;)👍 Happy shooting!
Hi my friend if you are on Facebook join the Weihrauch hw90 group, its a private group with alot of knowledgeable people. As for your question you can top up the pressure by buying a cheap PCP pump off eBay bought mine for £20 and you need to buy the HW90 bestfittings adapter, you can get them on eBay aswell, its better getting a PCP pump with pressure gauge than getting a slim jim pump because there is no pressure gauge on it, you need around 19 - 21 bar of pressure in the ram for 11.5ftlbs power, hope this helps.
God I'm cringing at you twisting the bolt on the barrel. Just break the barrel open and you can nearly unscrew it with your bare fingers, please! Hurts to watch
