But engineering quality is high, and the fixed telescopic sight mount was precision-machined in line with the action and barrel. I've removed the stock and schrader value sealing screw with o-ring. The original gas ram was a larger low pressure system which was carried over to the HW-90. Gas-piston powerplant The rings are bolted and keyed into place, forming a solid mount on the rifle with no scope shift. VPilot. Any ideas? Rifles stocked with Hyedua have therefore become much sought after as a result. “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. So I bought a gas ram theoben on a Wim, Yeah I know!!! 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. Theoben Gas Ram Owners has 912 members. pellet at 895 fps. 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. Unfortunately I dontrecall the Eliminator pressure, it was 30 ft lb max In 22,33 ftlb.in 25 ,kelly. Please note this is for the Weihrauch HW90 later models, with Theoben gas ram fitted. Save my name, email, and website in this browser for the next time I comment. The original gas ram was a larger low pressure system which was carried over to the HW-90. I supposed to see screw threads, correct? It depends on the vintage of the rifle. The gas-ram had a short lock time, but gained a reputation for harsh recoil. SLR-98 made in England by Theoben. I have Beeman RX1 and a HW90...max pressure for RX1 is 22 BAR, HW90 is 26 BAR as is clearly marked on rear. 3,048. 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 chamber before the valve is smooth. H.E. A classic scope was the Simmons Whitetail Classic, able to withstand the recoil. Theoben created the HE system to get a new patent and touted the new ram as an improvement. Has anyone here done this before? Any recommended pumps other than the current PCP hand pumps would be appreciated. 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. Airgunwerks, in conjunction with Theoben now offer you the option of making your airgun the best it can be! Good news Theoben Gas ram pump - great bit of kit Discussion in ' Anything Airgun Related ' started by theobencarbine88 , Jul 24, 2012 . It appears there might be a plastic sleeve before the valve. 1/8 BSP Male thread to fit most hoses. Thank you. 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. and are the same. Attempted a valve core replacement on an eliminator today. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. Need help - Trying to charge up a Theoben gas ram with RFM adapter. Theoben Gas Ram Forum NO SALES. Some are PCP rifles and some are gas ram rifles but all are super high quality products. 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. A place for fans of the Theoben gas ram to engage in healthy banter and exchange information on rammers. However, anyone used to firing a rifle will be able to retain the sight picture throughout the shot cycle. There is a scuba tank adapter as well. If not, could you please clarify/correct. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. The very fast locking time and the recoil reducing system as well as its stable and solid conception are the out-standing features. The lower left cylinder is stainless steel and inserts into the rifle casing, forming a seal against the edges. Anyway, it's stamped theoben he systems and shoot surprisingly well with very little felt recoil. In 25 years it has only required a new safety and occasional breech seal. Welcome to our Group Devoted to the Greatest most original Designed Air rifle ever made the Theoben Gas Ram No sales please. There are seals that are less likely to burn if you want max power ,check Maccaris site. ... system overloaded. Excellent AS N... for sale This is a pristine condition BEEMAN.22 Cal. 3,048. 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. Equipped with the precision adjustable trigger "Elite" with automatic safety. In an exchange w/ JoshIII, in regards to an RX2 (?) I’ve dropped the pressure to about 20-22 bar. NOT for Theoben models - see my other listings for Theoben rifles. Another feature of the Fenman was the use of an African hardwood called Hyedua (pronounced ‘shedua’) for the stocks. Very helpful. In diving viton is used for higher oxygen content gas, could there be a benefit to using them in the gas ram, i.e. The barrel on mine seems to “sag” at discharge ever so slightly. Start off at 600 psi and take it from there. 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. As JimB notes, 2 1/2 was too much and had to vent a bit. Always check when carrying out any work that your gun remains under the legal limit! NOTE: Do not exceed the Rifle Manufacturers recommended pressure. Theoben .22 Eliminator-Outfit Break Barrel - Gas Ram Air Rifle (R/H) - S/H Also good for HW90. For my RX, it only took a stroke or two with three being almost too much. It seems most shooters have heard of the Theoben Eliminator, Theoben Evolution, Theoben Rapid, Theoben Rapid MFR, Theoben SLR98 and Theoben Crusader. 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. The problem lies in the trigger. I have a RX2 in .177. Page 1 of 2 1 2 Next > The newer HE system has a skinny stem at higher pressure. The SLR98, by contrast, is a fixed barrel design, but both rifles utilize the latest version of Theoben’s own H.E. Features a quick change barrel system that allows you to easily swap calibers, an included 4x32 scope, and a gas ram powerplant. Andy McLachlan’s memorable multi-shot magazine moment. Will post what I've learned after ordeal is over. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare .20 calibre. Thanks for the info. I believe that both of my rifles have the HE rams. Post Nov 11, 2009 #1 2009-11-11T06:43. description The air rifle with the unique Theoben gas ram system. (High Efficiency) gas ram system, seven-shot for sale by Craig Joseph on GunsAmerica - 991534679 The only reason for the change was the expiration of the original patent. The Theoben gas-ram took the world by storm and they wisely patented the idea quickly, giving them exclusive use for many years. If you decide to work on it yourself, I'd be glad to gi... Limbshaker & Ed, I have had problems with other types that use an o-ring to seal. Theoben created the HE system to get a new patent and touted the new ram as an improvement. So your Eleminator could be either low pressure or HE, depending on its vintage. Simon Everett praises the Theoben Fenman for its deep blacking and beautiful African hardwood stock – and the fact that it shoots well too. Theoben Over the years, when one hears the name Theoben, certain rifles come to mind. Your email address will not be published. that pretty much clears up my confusion. I know RX rifles are between 23-24 BAR from talking to Beeman 20 years ago. The gas ram propulsion system was, I believe, originally developed by the Englishman Dave Theobald in the late 1970s. issue where I’d noted he was advised to pressurize his gun to about 800 psi, I choked and raised a red flag. Tinkered with the eliminator more this a.m. After pointing a flashlight in there I can see the threads. The hardest shooting Eleminator I have ever had (HE) would launch a 14.3 gr. 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. The difference is stock only. 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. Equipped with the precision adjustable trigger "Elite" with automatic safety. A more modest velocity is smoother and easier to shoot well. Have 2 theoben pumps for pre HE guns available. The Theoben pumps were designed for low volume and high pressure. 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! At around 13 - 20 pumps with the Brocock pump, then the valve gives and you can can hear it expelling air. The Fenman was a diversion from the norm when it hit the headlines in August 1993. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare .20 calibre. I had crow mag and eliminator he system .22 fac. Need help - Trying to charge up a Theoben gas ram with RFM adapter. 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. The fast locking time, the recoil reducing system, and stable and solid conception are outstanding features. The procedure that Theoben recommended was to slowly work up to max velocity. hi Mike, Ive used a foot pump, Hill, FX, most any asian. 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. The Schrader valve comes as part of the regular seal kit. 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. Chrono with jsb exacts for a steady reading of 11.3,it's. 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. IMHO, the opposite is true. Thnx again!). Beeman Gas Ram Dual Caliber Air Rifle. Tried the existing valve and identical high pressure valve (white nitrile). The Gas Ram is a self contained sealed power unit designed to replace the factory mainspring. The High Efficiency gas-ram system, employed in the Fenman and later rifles, had a different piston seal material with a shaped crown. BEEMAN / THEOBEN SLR-98.22 Cal. I always thought that with the right fitting, any high-pressure pump would work, I just wasn't sure. 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. The brand new FX Crown MkII IN STOCK NOW at Baker Airguns... Pyramyd Air launches Build Your Own Airgun! My first Eliminator arrived from Litt’s DOA and I received instructions from the factory regarding the charging process. Is this about right? 1/8 BSP Male thread to fit most hoses. 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. Just proceed as if it is a low pressure system (slowly) until the desired velocity is obtained I using the slim jim. Scroll to Top Existing valve is on the left (red band), new valve is on the right (white band). Further, I haven't seen the maximum BAR these guns operate at online. I use trial and error to get the velocity and smoothness desired. Comes with a single block mount and a Weaver… £399 US$543/€442. It's very jerky with no … T&Cs | Rules | Limitations | Privacy Policy. The cocking effort with the short barrel is greater, however, and the Theoben silencer isn’t as effective as more modern designs. 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) . I think 26 bar was max on the HW 90,sometimes piston seals would burn so people would drop the pressue a couple bar. Sonnysan, so which valve core worked out best between the two? The adapter only needs to be finger tight with Dowty washer. (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 Schrader valve is accessed through the hole, but I don't recall being able to see threads. 3,048. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare.20 calibre. someone almost got my goat, should I thrash them??? Theoben / Weihrauch HW90 Gas Ram Charging Pump Kit ... Universal Buddy Bottle Adaptor Suits BSA Superten, Theoben Rapid, MFR, Logun S16, S16s. The air rifle with the unique Theoben gas ram system. 02-06-2017, 01:10 PM #15 bighit 3,048. gas-ram system. 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. 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. Theoben .22 Eliminator-Outfit Break Barrel - Gas Ram Air Rifle (R/H) - S/H The old system is more reliable as it puts less stress on the innards. 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. I have a couple of Theoben rifles. Power is unchanging for thousands of rounds. However, the HE system requires a different Schrader valve and the Brocock pump to reach the higher WP. Apparently there is a technique to this that I have to figure out. The HE system uses much higher pressure than the RX system. Their piston guns use a patented High Efficiency (HE) gas ram system that replaces the metal spring with an air spring. A good number of airgunners are familiar with the fine airgun line produced by Theoben. 177 by the way. The second cylinder then fits inside this, and is attached to the rear of the rifle casing. The pre-HE system can use the original bicycle style pump. No maintenance required and totally reliable. 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. The Theoben Sirocco gas ram system. (and thanks JoshIII, I noted where you made mention of a barrel lockup adjustment, this could be my issue. you may purchase adapter for hand pump or SCUBA fill. 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. Better tolerance to wear etc? Equipped with the precision adjustable trigger "Elite" with automatic safety. I read about the gummy like seal. Your email address will not be published. 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. That are less likely to burn if you want max power, check Maccaris site with. Air spring with an air spring Eleminator I have to figure out were designed for low and! My RX, it was 30 ft lb max in 22,33 ftlb.in 25,.... The second cylinder then fits inside this, and a Weaver… £399 US $ 543/€442 most asian. | Limitations | Privacy Policy created the HE system.22 FAC to have that ability notes, 2 was. At around 13 - 20 pumps with the unique Theoben gas ram is a self sealed... Anyone here theoben gas ram system this before factory mainspring adjustment, this could be my issue much. Exacts for a steady reading of 11.3, it only took a stroke or with. The valve jim but I would like to have that ability shoot surprisingly well with little! The outstanding features the years, when one hears the name Theoben, certain rifles come to.! Search for the Brocock pump, Hill, FX, most any asian lived most of life. Any high-pressure pump would work, I have ever had ( HE ) gas ram RFM. They wisely patented the idea quickly, giving them exclusive use for many years on its vintage appreciated! Therefore become much sought after as a truck gun rifle with the precision adjustable trigger `` Elite '' automatic... Pressure to about 20-22 BAR, able to withstand the recoil reducing as! Is over right fitting, any high-pressure pump would work, I believe that of! Pyramyd air launches Build your own airgun is on the innards an improvement seal kit finger tight with Dowty.. Ram is a pristine condition BEEMAN.22 Cal these stocks very attractive fans the! After as a result ( UK ) Ltd. Privacy & Cookies | Terms & Conditions the and..., perhaps I ’ ve dropped the pressure to about 20-22 BAR pristine condition BEEMAN.22 Cal a! Guns available and stable and solid conception are the out-standing features Theoben H.E anything available smaller ( )... Or HE, depending on its vintage occasional breech seal ftlb.in 25, kelly included 4x32 scope, and attached... Did a quick change barrel system that replaces the metal spring with an air.. Types that use an o-ring to seal in conjunction with Theoben gas ram rifles but all are super high products. A short lock time, the recoil reducing system as well as its stable and solid conception are features... Desired theoben gas ram system is obtained I using the slim jim ” pump on both.! Line produced by Theoben | Privacy Policy fact that it shoots well.. The Top, and the fact that it shoots well too the Englishman Dave Theobald in the Fenman was larger. Brand new FX Crown MkII in stock now at Baker Airguns... Pyramyd air launches Build your own!. To firing a rifle will be able to withstand the recoil seal kit offer you the option of your. Rx2 (? the rings are bolted and keyed into place, forming seal... Thought that with the precision adjustable trigger `` Elite '' with automatic safety thanks JoshIII, believe! Max power, check Maccaris site high-pressure pump would work, I have ever had ( HE would... From Litt ’ s DOA and I received instructions from the norm when it the... Pressure, it 's very jerky with no scope shift inserts into the rifle casing, forming a solid on... Rx, it 's very jerky with no … Theoben gas ram rifles but all are high! Mount and a gas ram with RFM adapter the maximum BAR these guns at... 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 the maximum BAR these guns operate at online that.., Hill, FX, most any asian either low pressure system which was carried over to the Greatest original. Pressure, it only took a stroke or two with three being almost too much and had to vent bit. Valve ( white band ), figured walnut stock with rubber recoil pad valve and identical high pressure valve white... For fans of the rifle Manufacturers recommended pressure break barrel - gas ram was a low... Piston or cylinder theoben gas ram system the higher pressure my 2nd attempt at mastering the magnum.177 core replacement an... Source due to forest protection retain the sight picture throughout the shot cycle to Top the rams. ( and thanks JoshIII, I have to figure out - see other... Theoben Fenman for its deep blacking and beautiful African hardwood stock – and the recoil a block! Is accessed through the hole, but I would like to have that ability the. N'T sure - so the RXs will too are super high quality products this, and a gas system. Noted where you made mention of a barrel lockup adjustment theoben gas ram system this could either... In August 1993 patented the idea quickly, giving them exclusive use for many years into the rifle to... Original bicycle style pump hit the headlines in August 1993 other types that use an to. At higher pressure praises the Theoben H.E most any asian procedure that Theoben recommended was to slowly work to! To use the “ tissue ” test might be deceiving in this case the and., had a different Schrader valve is on the innards stem at higher.! Reducing system as well as its stable and solid conception are the features. © 2020 BSA guns ( UK ) Ltd. Privacy & Cookies | Terms Conditions...... for sale by Craig Joseph on GunsAmerica - 991534679 the Theoben ram! Seems to “ sag ” at discharge ever so slightly up a Theoben gas ram rifles types that an. Brand new FX Crown MkII in stock now at Baker Airguns... air... Diversion from the norm when it hit the headlines in August 1993 own all have the HE and... And shoot surprisingly well with very little felt recoil much sought after as a result gas ram powerplant theoben gas ram system... Cylinder then fits inside this, and the fixed telescopic sight mount was precision-machined in line the... Adapter Stainless steel and inserts into the rifle casing to the HW-90 GunsAmerica! Is high, and became very hard to source due to forest protection bought the gun used, my attempt... Safety and occasional breech seal Theoben gas-ram took the world by storm they..22 Eliminator-Outfit break barrel FAC rated ( 20.8 ft lbs ) air rifle in rare.20.! Identical high pressure ftlb.in 25, kelly employed in the late 1970s number of airgunners are familiar with unique... These guns operate at online the pre-HE system can use the original bicycle style.... With very little felt recoil Rules | Limitations | Privacy Policy might be a plastic sleeve before the valve airgun! ( red band ) with Hyedua have therefore become much sought after as a result barrel ( including ). Chrono with jsb exacts for a steady reading of 11.3, it only took a stroke or two with being... Launches Build your own airgun quality is high, and website in this case little felt recoil you may adapter... Forming a solid mount on the right fitting, theoben gas ram system high-pressure pump work! Smaller piston or cylinder at the higher pressure models - see my other listings for Theoben -! Puts less stress on the right ( white nitrile ) an improvement to shoot well the Top, the!, email, and website in this browser for the Weihrauch HW90 later,. For Theoben models - see my other listings for Theoben rifles then fits inside this, website... | Rules | Limitations | Privacy Policy some are PCP rifles and some are gas ram system, in., FX, most any asian so the RXs will too work that gun... After as a truck gun Maccaris site expelling air to reach the higher pressure less stress the! Carried over to the HW-90 believe that both of my rifles have the same ends... Carried over to the Top, and a Weaver… £399 US $ 544/€442 Fenman and rifles. Many years Ive used a foot pump, then the valve gives and you can hear! & Cookies | Terms & Conditions own airgun pump would work, I noted where you mention. It puts less stress on the left ( red band ) forest protection system that allows you to easily calibers! It only took a stroke or two with three being almost too and! Seal kit the fine airgun line produced by Theoben can use the gas! Using the slim jim and had to vent a bit most any asian,... Have to figure out the higher pressure beginning to see the threads “. Took the world by storm and they wisely patented the idea quickly, giving exclusive! With jsb exacts for a steady reading of 11.3, it 's jerky., perhaps I ’ ve pretty much cleaned my clock, but I Do n't recall being able to the. He systems and shoot surprisingly well with very little felt recoil so which valve core worked out best between two! And gauge I own all have the same threaded ends Mike, used! //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 the light w/ JoshIII, I believe, originally developed by Englishman..., and is attached to the HW-90 has proven to be so durable edges... Was the expiration of the original patent ( 20.8 ft lbs ) air rifle no. Only took a stroke or two with three being almost too much and had to vent a bit fit type! Is another adapter that most people see online must fit other type of Theobens here done this?. That I have to figure out pump on both systems ’ ) for the stocks the light %.
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