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Air Gun Home Forum Index » Rifles » modding a multi pump gun? Goto page Previous  1, 2, 3  Next    View previous topic :: View next topic    Posted: Wed Dec 31, 2008 11:17 pm broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands Crosman140 wrote: Nope, look at the rifle he's talking about, daisy powerline 856. I guarantee, he won't be tired after pumping that 20 times. A very easy gun to pump...well, unless he's 6 years old. Well, okay, but maybe a bit shakey? I know I don't want a pumper because I want instand power and I generally have the strength of a 6 year old. One that's about 6 feet tall, but still... _________________ BIG GAP   Posted: Fri Jan 02, 2009 3:27 am Crosman140 Senior Member Joined: 13 Dec 2008 Posts: 663 Location: USA I've never had anything but pumpers, but I can definitely see the advantage of a one "pump" springer. _________________ My Critter Gitters .22 Crosman 140 (1955) .177 Crosman G1 (2009) .177 Crosman 1377 (2009) .177 Daisy 880 (2019) BB Daisy Red Ryder (2012) BB Daisy Buck (2019) BB Crosman 1600 (1980) BB Marksman 1010 (1979)   Posted: Fri Jan 02, 2009 9:45 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands Pumpers are for hard workers. _________________ BIG GAP   Posted: Sun Jan 04, 2009 10:01 am Crosman140 Senior Member Joined: 13 Dec 2008 Posts: 663 Location: USA My Crosman 140 is a real tough pumper. I reach 8 and call it good. _________________ My Critter Gitters .22 Crosman 140 (1955) .177 Crosman G1 (2009) .177 Crosman 1377 (2009) .177 Daisy 880 (2019) BB Daisy Red Ryder (2012) BB Daisy Buck (2019) BB Crosman 1600 (1980) BB Marksman 1010 (1979)   Posted: Thu Feb 04, 2010 7:04 pm midnightsniper Member Joined: 04 Feb 2010 Posts: 60 Location: Upstate,SC,USA This topic went astray.The older Daisy 880 with the metal receiver can be modified.Port n polish on everything,re-crown and polish,brass flat top piston,springs,standard trigger mods to smooth and lighten the pull,and quality seals.It'd be a good idear to find a person that knows modding and Daisy guns.Then get them to make the parts need and get springs from them.Most of the parts can be made and sent for less than $100.If you have already gotten your moneys worth out of the gun,and it's time to freshen up the seals,why not?There's not many $100 guns that can push 800 to 900fps and be accurate.Shoulder stocks and fore stock can be made from quality ply and Gorrila glue or cut out of 2x stock.If it's quality wood you can stain,varnish, or coat with polyurathane.If not,just paint it up in tactical black.I have my 880 and a friends 880 that needs a reseal.I am trying to talk him into letting me mod his first.He don't shoot as much as I do plus he has a lot of guns to fall back on.If you have the plastic receiver model,I'd just do a seal kit and enjoy plinking and small game hunting.   Posted: Thu Feb 04, 2010 9:01 pm kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Hummm ..sat here reading though this thread.. Almost all of the posts before I realise its over a year old... what a dumb a$$.... Pete   Posted: Thu Feb 04, 2010 10:01 pm midnightsniper Member Joined: 04 Feb 2010 Posts: 60 Location: Upstate,SC,USA kanyon wrote: Hummm ..sat here reading though this thread.. Almost all of the posts before I realise its over a year old... what a dumb a$$.... Pete I added the info because I know a lot of people ask about the daisy 880.People who actually search the forums, like I did, will turn these over and hopefully find some useful info.I direct people with questions to this site.If they are not already a member.   Posted: Fri Feb 05, 2010 3:17 am Crosman140 Senior Member Joined: 13 Dec 2008 Posts: 663 Location: USA midnightsniper wrote: kanyon wrote: Hummm ..sat here reading though this thread.. Almost all of the posts before I realise its over a year old... what a dumb a$$.... Pete I added the info because I know a lot of people ask about the daisy 880.People who actually search the forums, like I did, will turn these over and hopefully find some useful info.I direct people with questions to this site.If they are not already a member. You did fine, Midnightsniper. One thing I find with airgun forums versus firearm forums is the level of maturity varies accordingly. _________________ My Critter Gitters .22 Crosman 140 (1955) .177 Crosman G1 (2009) .177 Crosman 1377 (2009) .177 Daisy 880 (2019) BB Daisy Red Ryder (2012) BB Daisy Buck (2019) BB Crosman 1600 (1980) BB Marksman 1010 (1979)   Posted: Fri Feb 05, 2010 2:20 pm midnightsniper Member Joined: 04 Feb 2010 Posts: 60 Location: Upstate,SC,USA Crosman140 wrote: midnightsniper wrote: kanyon wrote: Hummm ..sat here reading though this thread.. Almost all of the posts before I realise its over a year old... what a dumb a$$.... Pete I added the info because I know a lot of people ask about the daisy 880.People who actually search the forums, like I did, will turn these over and hopefully find some useful info.I direct people with questions to this site.If they are not already a member. You did fine, Midnightsniper. One thing I find with airgun forums versus firearm forums is the level of maturity varies accordingly. Yes,I agree.   Posted: Mon Dec 19, 2011 7:40 pm radar Silver Status Member Joined: 13 Nov 2011 Posts: 1138 Location: Des Moines, Iowa, USA Just to stay out of trouble, I don't recommend anyone getting inside their airguns, because I never know what anyone else can or can't do. But here's a little power mod I did to my Daisy 901. I got about 10% more muzzle energy with it. But probably not a lot can be done with this design. This is where the the hammer opens the valve…and not very much. The hammer is the more or less flat bar that pries open the valve stem quickly as it swings up and hits it after the trigger is pulled. As the hammer flies upward (in the picture) it catches the C-clip on the valve stem, knocking it open and holding it open until the gun is cocked again. The little chamber area under the valve stem is where the pressurized air is contained after pumping up the gun. This valve allows the air to blast upwards through a port into the chamber, driving out the pellet. In order to open the valve sooner and further to help airflow, I cleaned and roughed up the hammer notch that hits the valve and used J-B Weld to fasten a small steel washer over it. Shaped and filed: I also stretched the hammer spring just a little to make it stronger. (Safety glasses on whenever working with, removing, or installing springs.) This is where it fits over the spring boss on the hammer. This is the trigger safety catch that will not allow the trigger to be pulled until the bolt is closed. It goes in like this if it falls out. The end has to drop into that little shelf there. The hammer holds it in. The trigger has a little nub that has to go up through the rectangular hole in the safety tab. This was a little tricky. I take the cross pin out of the hammer and slide it to the rear of the action to get some space between the hammer and trigger spring bosses in order to get the spring to fit between them. Then I shove the hammer forward again and try to get the hammer pin hole to line up with the holes in the sides of the housing. If it hangs up not wanting to go forward, it is usually that safety tab is popping up and need a finger to push it down while the hammer is aligned. The safety tab likes to pop up and out of that little ledge if it isn’t held down. A nail, a little smaller than the hole on one side, and a pin punch on the other helped. The top view of the safety tab as it sets. If it is sticking all the way up so the nose isn’t caught under the ledge there, the bolt will not close. Note this safety has nothing to do with the trigger block safety that you operate by hand. Last edited by radar on Tue Dec 20, 2011 7:20 pm; edited 1 time in total   Posted: Tue Dec 20, 2011 4:33 am Alstone Moderator & Site Supporter Joined: 01 Mar 2007 Posts: 4139 Location: Linconshire, ENGLAND Nice little mod their Radar, and good photos showing how to do it. Al _________________   Posted: Tue Dec 20, 2011 8:34 am radar Silver Status Member Joined: 13 Nov 2011 Posts: 1138 Location: Des Moines, Iowa, USA Thank you. This was probably an almost pointless exercise in tinkering with a sub-$60, but it was sorta fun. Crosman is the hot pumper to mod, but I like these Daisy Powerline-design rifles, actually. They are fairly powerful at 8-10 FPE typical, surprisingly accurate for a cheap gun, and the innards are pretty much metal in spite of the external plastic. I like how they are easy to understand and pretty forgiving to disassemble-assemble. Later on I took the valve apart and drilled out the port to the next size bit, and polished up the sealing face. That gained little to nothing in velocity as I think I've gotten all the valve can give with this mod, but showed me I could take it apart right to the last bit and still put it back together in working order. No pictures of that operation, I afraid. I think Daisy has done a very good engineering job on these to make an inexpensive, repairable, good performer for a discount store price point. The 880, 901, 22SG, are all about the same inside, and I bet the .177 could be converted to a .22 with a barrel swap and a little chamber drilling. I've found the barrel (the actual shot tube) will come out of and go into the valve body with a little heating of the valve body with a butane torch.   Posted: Tue Dec 20, 2011 9:19 am Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Quote: This was probably an almost pointless exercise in tinkering with a sub-$60, but it was sorta fun. To the contrary, this is the kind of gun to tinker with, because the exercise is low risk and potentially high gain. Tinker with a $500 gun and you risk wrecking it for nothing. Look at the legions of guys that play with Chinese B3's. Quote: drilled out the port to the next size bit, and polished up the sealing face. That gained little to nothing in velocity I did that with a Marksman 2004 pistol, with the same result. Except - while the velocity didn't increase much, it became more consistent from shot to shot. I appreciate the quality of your photography and the effort you put into preparing the post. If I ever find a Daisy in front of me this will be my first reference. _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Tue Dec 20, 2011 1:00 pm midnightsniper Member Joined: 04 Feb 2010 Posts: 60 Location: Upstate,SC,USA radar wrote: Thank you. This was probably an almost pointless exercise in tinkering with a sub-$60, but it was sorta fun. Crosman is the hot pumper to mod, but I like these Daisy Powerline-design rifles, actually. They are fairly powerful at 8-10 FPE typical, surprisingly accurate for a cheap gun, and the innards are pretty much metal in spite of the external plastic. I like how they are easy to understand and pretty forgiving to disassemble-assemble. Later on I took the valve apart and drilled out the port to the next size bit, and polished up the sealing face. That gained little to nothing in velocity as I think I've gotten all the valve can give with this mod, but showed me I could take it apart right to the last bit and still put it back together in working order. No pictures of that operation, I afraid. I think Daisy has done a very good engineering job on these to make an inexpensive, repairable, good performer for a discount store price point. The 880, 901, 22SG, are all about the same inside, and I bet the .177 could be converted to a .22 with a barrel swap and a little chamber drilling. I've found the barrel (the actual shot tube) will come out of and go into the valve body with a little heating of the valve body with a butane torch. Thanks for that write up.I'll have to give it a try on my 880.The SG22 will swap over, but it's pointless,unless you on both guns and the 22SG is beyond repair.The stocks will swap over.The wood SG stock makes the .177 feel more rifle like than cheap bb/pellet gun. _________________ Received my new Crosman 1377 from Crosman.   Posted: Tue Dec 20, 2011 7:17 pm radar Silver Status Member Joined: 13 Nov 2011 Posts: 1138 Location: Des Moines, Iowa, USA Well Slavia, thank you. I'm honored...and that's a good point. It is pretty low risk to the cheapie gun. mignightsniper, I just got done with reconverting an 880 that had been an 22SG...but now had the wooden stock...the one I call Frankendaisy...back to .22 cal. I had problems with the SG leaking, and then it wouldn't hold a group for some reason. Barrel loose I guess. Si I took the good 880 valve body and drilled the chamber out to .22 caliber. Put the re-crowned .22 barrel back on it, then, and reseated in in the 880 barrel shroud. I haven't shot it yet, but I am hoping to have my 22SG back in order. I love that these parts cross over and they are really fun to work on. The Powerlines are a very straightforward design. modding a multi pump gun?     Air Gun Home Forum Index » Rifles You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 2 of 3   Goto page Previous  1, 2, 3  Next All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." 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