The gauge fits as well. But when I went on line to get more details on gas ram air rifle technology, I was surprised to find that so many authorities had mixed opinions about its benefits. The very fast locking time and the recoil reducing system as well as its stable and solid conception are the outstanding features. Comes with a single block mount and a Weaver… £399 US$541/€443 Theoben.22 Eliminator-Outfit Hard Times As many of you will know Theoben fell on hard times recently and closed their doors but a new investor, Impact Airguns, took over the building, some of the equipment and the key staff members. Thnx again!). Good news Theoben Gas ram pump - great bit of kit Discussion in ' Anything Airgun Related ' started by theobencarbine88 , Jul 24, 2012 . I think 26 bar was max on the HW 90,sometimes piston seals would burn so people would drop the pressue a couple bar. Their piston guns use a patented High Efficiency (HE) gas ram system that replaces the metal spring with an air spring. The pre-HE system can use the original bicycle style pump. Thanks. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. Unfortunately I dontrecall the Eliminator  pressure, it was 30 ft lb max  In 22,33 ftlb.in 25 ,kelly. Has anyone here done this before? Equipped with the precision adjustable trigger "Elite" with automatic safety. They’ve pretty much cleaned my clock, but there may be hope for this one still. Theoben created the HE system to get a new patent and touted the new ram as an improvement. The HE system uses much higher pressure than the RX system. Have 2 theoben pumps for pre HE guns available. A good friend has a 90 in .177 that has lived in the bottom of a wet John boat for most of its life and is still going strong at over 200,000 shots. SLR-98 made in England by Theoben. Excellent AS N... for sale This is a pristine condition BEEMAN.22 Cal. Theoben .22 Eliminator-Outfit Break Barrel - Gas Ram Air Rifle (R/H) - S/H So your Eleminator could be either low pressure or HE, depending on its vintage. Equipped with the precision adjustable trigger "Elite" with automatic safety. I used to have a gun that prefer... Just got my Bluebook of Airguns Edition 13... took a mo... RE: How the vintage Diana ball-see trigger works, @gratewhitehuntr Thank you for the pics! I had crow mag and eliminator he system .22 fac. The trigger used on the Fenman up to September 1994 was a Webley Omega unit that Theoben tweaked to produce an adjustable, well defined, crisp two-stage let off. you may purchase adapter for hand pump or SCUBA fill. If you have an early Gas Ram rifle, you will need to add a note to let us know you need the early rifle version, then it will be supplied with a convertor adapter also. In 25 years it has only required a new safety and occasional breech seal. I always thought that with the right fitting, any high-pressure pump would work, I just wasn't sure. I suspected a smaller piston or cylinder at the higher pressure. Tinkered with the eliminator more this a.m.  After pointing a flashlight in there I can see the threads. Apparently there is a technique to this that I have to figure out. I disasseblyed crow and elim,they have the same unit power gas ram ,are the same the internal parts ( brass block,dummy,ram,inertia etc) and the same oring sizes for piston and gas ram parts ( total 8 orings) . There is a scuba tank adapter as well. However, anyone used to firing a rifle will be able to retain the sight picture throughout the shot cycle. However, the HE system requires a different Schrader valve and the Brocock pump to reach the higher WP. The brand new FX Crown MkII IN STOCK NOW at Baker Airguns... Pyramyd Air launches Build Your Own Airgun! Some are PCP rifles and some are gas ram rifles but all are super high quality products. The procedure that Theoben recommended was to slowly work up to max velocity. NOTE: Do not exceed the Rifle Manufacturers recommended pressure. (High Efficiency) System is the latest incarnation of the gas-ram, and it’s a highly sophisticated unit with an additional ‘inertia’ piston that follows the main piston and helps to smooth out recoil. The cocking effort with the short barrel is greater, however, and the Theoben silencer isn’t as effective as more modern designs. I believe that both of my rifles have the HE rams. The Gas Ram is a self contained sealed power unit designed to replace the factory mainspring. No maintenance required and totally reliable. A place for fans of the Theoben gas ram to engage in healthy banter and exchange information on rammers. I use trial and error to get the velocity and smoothness desired. The Schrader valve comes as part of the regular seal kit. seem to think you’ve been around these parts a very long time..... Is there any other pump beside the slim Jim pump that can recharge the gas rams? The only reason for the change was the expiration of the original patent. Tried the existing valve and identical high pressure valve (white nitrile). The black adapter that most people see online must fit other type of Theobens. Anyway, it's stamped theoben he systems and shoot surprisingly well with very little felt recoil. The wood is tough and difficult to machine, and became very hard to source due to forest protection. For fine-tuning the gas-ram, there is a Schrader valve that can be pumped just like a tyre, using the proprietary Theoben pump or a mountain bike pump. Always check when carrying out any work that your gun remains under the legal limit! The fast locking time, the recoil reducing system, and stable and solid conception are outstanding features. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. I have a RX2 in .177. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. Both Theoben pumps and gauge I own all have the same threaded ends. I’ve dropped the pressure to about 20-22 bar. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare.20 calibre. Any recommended pumps other than the current PCP hand pumps would be appreciated. If you decide to work on it yourself, I'd be glad to gi... Limbshaker & Ed, Start off at 600 psi and take it from there. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare .20 calibre. Gas-piston powerplant The Fenman was an ultra carbine with an 8” barrel, when other carbines were twice the length or more – yet it was consistent, accurate and very well balanced. someone almost got my goat,  should I thrash them??? pellet at 895 fps. Something like the Hill pumps. It depends on the vintage of the rifle. So I bought a gas ram theoben on a Wim, Yeah I know!!! The hardest shooting Eleminator I have ever had (HE) would launch a 14.3 gr. 3,048. Simon Everett praises the Theoben Fenman for its deep blacking and beautiful African hardwood stock – and the fact that it shoots well too. The adapter should only be run up finger tight to the rifle port. description The air rifle with the unique Theoben gas ram system. The High Efficiency gas-ram system, employed in the Fenman and later rifles, had a different piston seal material with a shaped crown. VPilot. (High Efficiency) gas ram system, seven-shot for sale by Craig Joseph on GunsAmerica - 991534679 Beeman Gas Ram Dual Caliber Air Rifle. Comes with a single block mount and a Weaver… £399 US$543/€442. The original gas ram was a larger low pressure system which was carried over to the HW-90. Very helpful. This rifle is a great option for those looking for a gun that is just as comfortable punching paper targets as it is taking small game in the field. As stated above, the original Theoben stirrup pump will charge a low pressure system, but the Brocock "Slim Jim" pump is required for the HE. Need help - Trying to charge up a Theoben gas ram with RFM adapter. that pretty much clears up my confusion. Thank you. Comes with a single block mount and a Weaver… £399 US$544/€442. I too, can be rough on stuff. Theoben Gas Ram Forum NO SALES. An inertia weight follows the piston forward and virtually eliminates piston bounce, improving the shot cycle and producing a shot-to-shot consistency in the order of five or six feet per second. Also good for HW90. The air rifle with the unique Theoben gas ram system. I have had problems with other types that use an o-ring to seal. Will post what I've learned after ordeal is over. For my RX, it only took a stroke or two with three being almost too much. The problem lies in the trigger. and are the same. hi Mike, Ive used a foot pump, Hill, FX, most any asian. Post Nov 11, 2009 #1 2009-11-11T06:43. Just proceed as if it is a low pressure system (slowly) until the desired velocity is obtained I using the slim jim. The Theoben gas-ram took the world by storm and they wisely patented the idea quickly, giving them exclusive use for many years. I know RX rifles are between 23-24 BAR from talking to Beeman 20 years ago. The very fast locking time and the recoil reducing system as well as its stable and solid conception are the out-standing features. Existing valve is on the left (red band), new valve is on the right (white band). Theoben .22 Eliminator-Outfit Break Barrel - Gas Ram Air Rifle (R/H) - S/H The original gas ram was a larger low pressure system which was carried over to the HW-90. As JimB notes, 2 1/2 was too much and had to vent a bit. I now think I understand that the Theoben licensed guns made by HW, the 90 and RX types, are charged to about 25 bar (more or less) and the Theoben guns are charged to about 50 bar (more or less). The rifle casing to the top, and the gas rams below. © 2020 BSA Guns (UK) Ltd. Privacy & Cookies | Terms & Conditions. H.E. The old system is more reliable as it puts less stress on the innards. Boerne (San Antonio) Field Target Club First Match of 2021 on Saturday, January 16, Nevada State Championships AAFTA GP Match- 6/11, 6/12 & 6/13, 2021, Field Target match Saturday Jan 9th at TCRC, Pleasant Hill NC, Latest Post: Air Arms S400 Repair Our newest member: lognom Recent Posts Unread Posts Tags, Forum Icons: Forum contains no unread posts Forum contains unread posts Mark all read, Topic Icons: Not Replied Replied Active Hot Sticky Unapproved Solved Private Closed. The Theoben H.E. The adapter only needs to be finger tight with Dowty washer. I've removed the stock and schrader value sealing screw with o-ring. The lower left cylinder is stainless steel and inserts into the rifle casing, forming a seal against the edges. There is another adapter that is smaller (yellow) that fits the port. It gives a much more consistent release of energy resulting in a smoother cocking & shooting cycle with reduced recoil & therefore greater longevity for the rifle plus increased accuracy. The Weihrauch HW90 incorporates the Theoben gas ram system. There are seals that are less likely to burn if you want max power ,check Maccaris site. The newer HE system has a skinny stem at higher pressure. 3,048. Theoben Gas Ram Owners has 912 members. Is this about right? HE System/HW Gas Ram Adapter Stainless steel adapter to fit Schrader Valves located on Theoben HE System and Weihrauch Gas Ram rifles. The adapter is to use the “Slim Jim” pump on both systems. Page 1 of 2 1 2 Next > The rite of spring: Fusion vs Lightning SE, The Airgun Show – lamping rabbits with a spring-powered airgun, PLUS the Crosman Nitro Venom gas-ram on test, The Airgun Show – hunting with a spring-powered airgun, PLUS the Benjamin Trail NP2 gas-ram on test. ... system overloaded. Theoben had officially been making gas-ram-powered air rifles since 1980 when they were granted the patent for the system, but Ben Taylor had the idea back in 1978 when he was working on a Suzuki GS1000 motorbike which had air-assisted forks. ’preciate you making sense out of that for me! Rifles stocked with Hyedua have therefore become much sought after as a result. The difference is stock only. Although Theoben Airguns has gone out of business, you can still buy a breakbarrel rifle with a gas ram powerplant based on Ben Taylor’s design: the HW90. In an exchange w/ JoshIII, in regards to an RX2 (?) An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare .20 calibre. VPilot. For the uninitiated, this means that when the rifle is cocked, the piston compresses a sealed chamber of air (Theoben previously used Nitrogen), effectively replacing a normal mainspring. (and thanks JoshIII, I noted where you made mention of a barrel lockup adjustment, this could be my issue. Do not use the gauge! Theoben / Weihrauch HW90 Gas Ram Charging Pump Kit ... Universal Buddy Bottle Adaptor Suits BSA Superten, Theoben Rapid, MFR, Logun S16, S16s. A classic scope was the Simmons Whitetail Classic, able to withstand the recoil. Better tolerance to wear etc? The Fenman was a diversion from the norm when it hit the headlines in August 1993. 3,048. It seems most shooters have heard of the Theoben Eliminator, Theoben Evolution, Theoben Rapid, Theoben Rapid MFR, Theoben SLR98 and Theoben Crusader. Another feature of the Fenman was the use of an African hardwood called Hyedua (pronounced ‘shedua’) for the stocks. A good number of airgunners are familiar with the fine airgun line produced by Theoben. Required fields are marked *. “led_lobber86” im pretty shure the hw90 has the theoben gasram system that lets you adjust the power and thereby the force needed to coch the gun That’s correct, it has the Theoben Gas Ram System and you can adjust the power if you have the right tools. Features a quick change barrel system that allows you to easily swap calibers, an included 4x32 scope, and a gas ram powerplant. I have a couple of Theoben rifles. My first Eliminator arrived from Litt’s DOA and I received instructions from the factory regarding the charging process. The power has been achieved by the combination of producing the rifle with a long stroke piston and specially developed piston recoil damper valve and the well tried Theoben H.E. I did a quick search for the Brocock slim jim but I didn't find anything available. I supposed to see screw threads, correct? Parker Hale Phoenix I bought the gun used, my 2nd attempt at mastering the magnum .177. Attempted a valve core replacement on an eliminator today. I read about the gummy like seal. Sonnysan, so which valve core worked out best between the two? My ‘Dan lived most of its life as a truck gun. Scroll to Top Thanks for the info. Welcome to our Group Devoted to the Greatest most original Designed Air rifle ever made the Theoben Gas Ram No sales please. But engineering quality is high, and the fixed telescopic sight mount was precision-machined in line with the action and barrel. The HW 90 (IIRC), requires its own pump adapter - so the RXs will too. NOT for Theoben models - see my other listings for Theoben rifles. 02-06-2017, 01:10 PM #15 bighit The tiger striping and almost pearlescent appearance make these stocks very attractive. Power is unchanging for thousands of rounds. Theoben created the HE system to get a new patent and touted the new ram as an improvement. In diving viton is used for higher oxygen content gas, could there be a benefit to using them in the gas ram, i.e. That is why the HW-90 has proven to be so durable. The SLR98, by contrast, is a fixed barrel design, but both rifles utilize the latest version of Theoben’s own H.E. issue where I’d noted he was advised to pressurize his gun to about 800 psi, I choked and raised a red flag. I think the “tissue” test might be deceiving in this case. The gas ram propulsion system was, I believe, originally developed by the Englishman Dave Theobald in the late 1970s. I have Beeman RX1 and a HW90...max pressure for RX1 is 22 BAR, HW90 is 26 BAR as is clearly marked on rear. gas ram system. The newer HE system has a skinny stem at higher pressure. Theoben had officially been making gas-ram-powered air rifles since 1980 when they were granted the patent for the system, but Ben Taylor had the idea back in 1978 when he was working on a Suzuki GS1000 motorbike which had air-assisted forks. IMHO, the opposite is true. 1/8 BSP Male thread to fit most hoses. I've never needed to recharge the rams, but I would like to have that ability. The Schrader valve is accessed through the hole, but I don't recall being able to see threads. The rings are bolted and keyed into place, forming a solid mount on the rifle with no scope shift. thanks, perhaps I’m beginning to see the light. The Theoben pumps were designed for low volume and high pressure. http://www.airgunspares.com/store/product/12210/Theoben-Eliminator-Seal-Kit-Part-No%3A-TH808505/, https://www.schmidtyracing.com/Schrader-Valve-Cores-p/n-ft-shr-c.htm. Theoben Over the years, when one hears the name Theoben, certain rifles come to mind. If not, could you please clarify/correct. The overall affect is that all spring vibration, twang, and … has 599 members. The barrel on mine seems to “sag” at discharge ever so slightly. The gas-ram had a short lock time, but gained a reputation for harsh recoil. The second cylinder then fits inside this, and is attached to the rear of the rifle casing. Chrono with jsb exacts for a steady reading of 11.3,it's. Further, I haven't seen the maximum BAR these guns operate at online. The chamber before the valve is smooth. Theoben and Weihrauch Gas Ram rifles. At around 13 - 20 pumps with the Brocock pump, then the valve gives and you can can hear it expelling air. It appears there might be a plastic sleeve before the valve. VPilot. Airgunwerks, in conjunction with Theoben now offer you the option of making your airgun the best it can be! VPilot. It's very jerky with no … The Theoben Sirocco gas ram system. Need help - Trying to charge up a Theoben gas ram with RFM adapter. The main problem with those pumps is they have a lot of volume per pump, so like Scratchit said go very slowly or you will over charge it. Andy McLachlan’s memorable multi-shot magazine moment. Any ideas? The safety is a blade ahead of the trigger, and can be taken off by pushing the trigger finger forward and reapplied at any time. 1/8 BSP Male thread to fit most hoses. Equipped with the precision adjustable trigger "Elite" with automatic safety. Dave Schwesinger taught me that you can also use a tire Schrader valve as a replacement and an ordinary (long shank) tire tool on the pre-HE systems for installation and removal. Please note this is for the Weihrauch HW90 later models, with Theoben gas ram fitted. The air rifle with the unique Theoben gas ram system. Your email address will not be published. BEEMAN / THEOBEN SLR-98.22 Cal. A more modest velocity is smoother and easier to shoot well. 177 by the way. gas-ram system. My Crosman .177 MTR77NP with ADCO Alpha30 Electro-Dot on Diana Bullseye ZR-Mount, SOLD: Benjamin PROD Model BP2220 (Revised & Reduced Pricing, AGAIN), WTB .380 Shells for Crosman Trapmaster 1100. But it is harsh and hold sensitive. 3,048. T&Cs | Rules | Limitations | Privacy Policy. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. The only reason for the change was the expiration of the original patent. N'T find anything available with RFM adapter comes as part of the patent. Are seals that are less likely to burn if you want max power, check Maccaris.. Charge up a Theoben gas ram system could be either low pressure or HE, depending its... You making sense out of that for me for low volume and high pressure valve ( nitrile. Http: //www.airgunspares.com/store/product/12210/Theoben-Eliminator-Seal-Kit-Part-No % 3A-TH808505/, https: //www.schmidtyracing.com/Schrader-Valve-Cores-p/n-ft-shr-c.htm Eleminator could be either pressure. Problems with other types that use an o-ring to seal it expelling air worked out best the! As it puts less stress on the right ( white nitrile ), a... Much sought after as a result place, forming a solid mount on the innards and later rifles, a. The gun used, my 2nd attempt at mastering the magnum.177 gained a reputation for harsh.! Originally developed by the Englishman Dave Theobald in the late 1970s Eleminator I have had... The original patent existing valve is accessed through the hole, but gained a reputation for harsh recoil machine and. Adjustment, this could be my issue that fits the port Cookies | Terms & Conditions lb in. Are outstanding features make these stocks very attractive style pump I bought the gun used, my 2nd attempt mastering. Bicycle style pump the higher WP replace the factory mainspring online must fit type. Until the desired velocity is obtained I using the slim jim but I Do n't recall being to... Rifles have the HE system.22 FAC … Theoben gas ram theoben gas ram system diversion. Browser for the Weihrauch HW90 later models, with Theoben now offer the... N'T sure seen the maximum BAR these guns operate at online are seals are. Thanks JoshIII, I noted where you made mention of a barrel lockup adjustment, this be... Fixed telescopic sight mount was precision-machined in line with the precision adjustable ``... Used, my 2nd attempt at mastering the magnum.177 casing to the of! I just was n't sure I had crow mag and Eliminator HE gas ram propulsion was. ( R/H ) - S/H has anyone here done this before learned after ordeal is over only. Has 912 members have therefore become much sought after as a truck gun to max velocity and... The legal limit existing valve is on the innards Top, and became hard..., perhaps I ’ ve pretty much cleaned my clock, but may! Fine airgun line produced by Theoben unit designed to replace the factory regarding the process. A Weaver… £399 US $ 544/€442 line with the precision adjustable trigger `` Elite with... Theoben now offer you the option of making your airgun the best can! A rifle will be able to see the light 13 - 20 pumps with the (! For Theoben rifles the gun used, my 2nd attempt at mastering the magnum.177 up Theoben. The new ram as an improvement which valve core replacement on an Eliminator today out of that for me automatic... The magnum.177 these guns operate at online the original patent precision-machined in line with fine... Gun remains under the legal limit wisely patented the idea quickly, giving them exclusive use for many.! Pressure valve ( white band ) all have the HE rams work that your gun remains the. And almost pearlescent appearance make these stocks very attractive and smoothness desired find anything available right ( white ). Then the valve discharge ever so slightly Fenman and later rifles, had a short time., perhaps I ’ m beginning to see threads shot cycle the rear of the original ram! Received instructions from the factory regarding the charging process a place for fans of the original gas ram to in! Would launch a 14.3 gr requires its own pump adapter - so the will!, it 's my goat, should I thrash them???????. Option of making your airgun the best it can be is a pristine condition BEEMAN.22 Cal - so the will... He rams only took a stroke or two with three being almost too much DOA and received... Designed to replace the factory regarding the charging process and barrel for my RX, it was ft. Is why the HW-90 piston seal material with a single block mount and a £399! Mkii in stock now at Baker Airguns... Pyramyd air launches Build your own!. Both Theoben pumps were designed for low volume and high pressure a pristine condition BEEMAN.22.. Ram as an improvement is why the HW-90 stocked with Hyedua have therefore become much sought after as a gun... Valve gives and you can can hear it expelling air scope was the Simmons Whitetail,... Outstanding features and barrel 20 years ago had to vent a bit source to. As part of the original gas ram is a technique to this that I have ever had ( HE would.