The hardest shooting Eleminator I have ever had (HE) would launch a 14.3 gr. 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. The HW 90 (IIRC), requires its own pump adapter - so the RXs will too. 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. The HE system uses much higher pressure than the RX system. someone almost got my goat,  should I thrash them??? Simon Everett praises the Theoben Fenman for its deep blacking and beautiful African hardwood stock – and the fact that it shoots well too. H.E. The Gas Ram is a self contained sealed power unit designed to replace the factory mainspring. The Schrader valve comes as part of the regular seal kit. gas-ram system. 3,048. The second cylinder then fits inside this, and is attached to the rear of the rifle casing. Any ideas? ... system overloaded. 3,048. The pre-HE system can use the original bicycle style pump. The difference is stock only. Have 2 theoben pumps for pre HE guns available. The fast locking time, the recoil reducing system, and stable and solid conception are outstanding features. An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare.20 calibre. 3,048. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. The rings are bolted and keyed into place, forming a solid mount on the rifle with no scope shift. Parker Hale Phoenix issue where I’d noted he was advised to pressurize his gun to about 800 psi, I choked and raised a red flag. 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. gas ram system. pellet at 895 fps. Something like the Hill pumps. Chrono with jsb exacts for a steady reading of 11.3,it's. That is why the HW-90 has proven to be so durable. I did a quick search for the Brocock slim jim but I didn't find anything available. I suspected a smaller piston or cylinder at the higher 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. I have a couple of Theoben rifles. (High Efficiency) gas ram system, seven-shot for sale by Craig Joseph on GunsAmerica - 991534679 The original gas ram was a larger low pressure system which was carried over to the HW-90. Theoben Gas Ram Owners has 912 members. that pretty much clears up my confusion. I've removed the stock and schrader value sealing screw with o-ring. The only reason for the change was the expiration of the original patent. 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. Gas-piston powerplant The Theoben Sirocco gas ram system. Both Theoben pumps and gauge I own all have the same threaded ends. However, anyone used to firing a rifle will be able to retain the sight picture throughout the shot cycle. 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. 02-06-2017, 01:10 PM #15 bighit The Theoben H.E. However, the HE system requires a different Schrader valve and the Brocock pump to reach the higher WP. The Theoben gas-ram took the world by storm and they wisely patented the idea quickly, giving them exclusive use for many years. The newer HE system has a skinny stem at higher pressure. Theoben created the HE system to get a new patent and touted the new ram as an improvement. Theoben / Weihrauch HW90 Gas Ram Charging Pump Kit ... Universal Buddy Bottle Adaptor Suits BSA Superten, Theoben Rapid, MFR, Logun S16, S16s. They’ve pretty much cleaned my clock, but there may be hope for this one still. I too, can be rough on stuff. Equipped with the precision adjustable trigger "Elite" with automatic safety. Need help - Trying to charge up a Theoben gas ram with RFM adapter. But it is harsh and hold sensitive. Please note this is for the Weihrauch HW90 later models, with Theoben gas ram fitted. 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. If not, could you please clarify/correct. There is another adapter that is smaller (yellow) that fits the port. Any recommended pumps other than the current PCP hand pumps would be appreciated. Page 1 of 2 1 2 Next > T&Cs | Rules | Limitations | Privacy Policy. The lower left cylinder is stainless steel and inserts into the rifle casing, forming a seal against the edges. 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. Sonnysan, so which valve core worked out best between the two? The newer HE system has a skinny stem at higher pressure. Also good for HW90. There is a scuba tank adapter as well. 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. 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) . you may purchase adapter for hand pump or SCUBA fill. The gauge fits as well. 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 wood is tough and difficult to machine, and became very hard to source due to forest protection. There are seals that are less likely to burn if you want max power ,check Maccaris site. I’ve dropped the pressure to about 20-22 bar. Theoben Over the years, when one hears the name Theoben, certain rifles come to mind. The gas ram propulsion system was, I believe, originally developed by the Englishman Dave Theobald in the late 1970s. The tiger striping and almost pearlescent appearance make these stocks very attractive. The air rifle with the unique Theoben gas ram system. I think 26 bar was max on the HW 90,sometimes piston seals would burn so people would drop the pressue a couple bar. 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 outstanding features. I read about the gummy like seal. Excellent AS N... for sale This is a pristine condition BEEMAN.22 Cal. Theoben created the HE system to get a new patent and touted the new ram as an improvement. No maintenance required and totally reliable. Existing valve is on the left (red band), new valve is on the right (white band). Tinkered with the eliminator more this a.m.  After pointing a flashlight in there I can see the threads. Anyway, it's stamped theoben he systems and shoot surprisingly well with very little felt recoil. ( yellow ) that fits the port ’ m beginning to see threads Fenman and later rifles had... Regular seal kit the tiger striping and almost pearlescent appearance make these stocks very attractive less likely to burn you! Cylinder is Stainless steel adapter to fit Schrader Valves located on Theoben HE system a. 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