Daisy 881 rebuild
Select Gate
READ GTA FORUM RULES BEFORE POSTING
GTA Forum Help Desk
GTA Announcement Gate
Dealer Area
GRIP
AirgunWeb Airgun Videos
Airgun Repository of Knowledge
Vendors and Vendor Videos
AirGun Expo 2021
Airgun Expo 2022
Contests and Giveaways!!!
Welcome New Members
In Memoriam
GTA Contributing Members
Shot Show Videos
Hajimoto Productions
Airgun Detectives
Air Gun Gate
BB Guns and Such
"Bob and Lloyds Workshop"
American/U.S. Air Gun Gates
European/Asian Air Gun Gates
PCP/CO2/HPA Air Gun Gates "The Darkside"
Air Archery
Vintage Air Gun Gate
Air Guns And Related Accessories Review Gates
Hunting Gate
Machine Shop Talk & AG Parts Machining
3D printing and files
Buyer's, Seller's & Trader's Comments
Bargain Gate
Back Room
Target Shooting Discussion Gate
Target Match Rules
Shooting Match Gates
Field Target Gates
The Long Range Club
100 Yard Match
Discussions By States
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
About
Help
Old GTA
Gallery
Search
Stats
Login
Register
Advertise Here
GTA
»
All Springer/NP/PCP Air Gun Discussion General
»
Air Gun Gate
(Moderators:
dk1677
,
GTA-Airgunner
,
Tater
) »
Daisy 881 rebuild
« previous
next »
Print
Pages: [
1
]
Go Down
Share This!
Author
Topic: Daisy 881 rebuild (Read 4275 times))
teknobel
Shooter
Posts: 19
Real Name: Tom
Daisy 881 rebuild
«
on:
June 27, 2013, 12:56:46 AM »
I'm sure someone here will know the solution to my problem. Sorry if this isn't the correct place for the question.
I was given an old Daisy 881 a few years ago. It would only hold pressure to 3 pumps. Beyond that the valve would leak out any additional pumps. I purchased a new valve assembly and seal kit to rebuild it. The new valve assembly isn't leaking, but the new chamber seal is not sealng either. I can get one pump in, but any further pumps empties the chamber and starts from scratch. I lubed the new seal when I installed it. I don't see any nicks or deformity with the new chamber seal. Is there some trick to getting them to seal? Or should I just assume I can't see the defect and order another seal?
Suggestions?
Tom
Logged
Colorado Springs, CO
Dick Tracey
Sharp Shooter
Posts: 965
It Is What It Is, Because It Is
Real Name: Dick Tracey
Re: Daisy 881 rebuild
«
Reply #1 on:
June 27, 2013, 11:15:48 AM »
If you have not tried it, cock the rifle and leave breach open, then pump it up.
DT
Logged
Knoxville, TN
Smooth Twist Technology
It Is What It Is, Because It Is
Dick Tracey
teknobel
Shooter
Posts: 19
Real Name: Tom
Re: Daisy 881 rebuild
«
Reply #2 on:
June 27, 2013, 11:26:13 AM »
Thanks for the suggestion Dick, but that is my procedure. I have this problem when I do those steps.
Logged
Colorado Springs, CO
Dick Tracey
Sharp Shooter
Posts: 965
It Is What It Is, Because It Is
Real Name: Dick Tracey
Re: Daisy 881 rebuild
«
Reply #3 on:
June 27, 2013, 08:19:10 PM »
No problem, that is sometimes an overlooked step. The last rebuild I did was an 850 and it leaked when I was done. I dissassembled cleaned and relubed and assembled again and it worked for me. Must have missed getting a seal right, they can be picky sometimes.
DT
Logged
Knoxville, TN
Smooth Twist Technology
It Is What It Is, Because It Is
Dick Tracey
teknobel
Shooter
Posts: 19
Real Name: Tom
Re: Daisy 881 rebuild
«
Reply #4 on:
June 27, 2013, 10:51:45 PM »
Tonight I disassembled the rifle again thinking that I would re-clean and re-assemble. The process helped me identify more of what is happening. On the first compression stroke, the mechanism seems to work correctly. Then when the "pump" mechanism is withdrawn for the second compression stroke, the chamber seal is being pulled (by vacuum) or pushed (by positive air pressure) (or both) over the ridge formed in the pneumatic tube that the seal seats against.
Is there a mechanism I am missing that lets air back into the pump stroke to permit the compression pump to be withdrawn without the vacuum resistance?
Logged
Colorado Springs, CO
robert w
when guns are outlawed , only out laws will have guns
GTA Senior Contributor
Posts: 4338
Real Name: robert
Re: Daisy 881 rebuild
«
Reply #5 on:
June 27, 2013, 11:27:24 PM »
just a thought did you by chance put the valve in backwards? don't know on a daisy but a crosman pumper you can. ask me I did
Logged
in 1939 hitler said give up your guns and germany will be a safer place... then a short time after all guns were taken ,he told the jews "board the train" a word in histroy
teknobel
Shooter
Posts: 19
Real Name: Tom
Re: Daisy 881 rebuild
«
Reply #6 on:
June 28, 2013, 12:29:20 AM »
I don't believe I did it wrong. The valve is threaded on one end and can only fit one way.
I'm assuming you actually meant the chamber seal. The seal is flat on one side with a groove cut at the edge that matches with the ridge in the pneumatic tube. I believe that face should be toward the pump mechanism (on the other side of the ridge in the pneumatic tube). The other side of the seal is formed with the expandable edge of the skirt and is formed with a nubb for a spring to seat against. It seems that face should be toward the compression chamber since the valve body pushes on the other end of the spring. This orientation would permit the skirt on the seal to press/seal against the pneumatic tube within the compression chamber. The schematic diagrams seem to show the orientation I have it installed.
I appreciate the ideas so far. They are definitely helping me work through the issue. Please keep them coming.
Logged
Colorado Springs, CO
DavidS
GTA Senior Contributor
Posts: 3273
Re: Daisy 881 rebuild
«
Reply #7 on:
January 07, 2015, 09:09:29 PM »
Seems odd. I would think that the ridge in the pump tube would make that impossible.
Are you using the original metal face for that seal?
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
GTA
»
All Springer/NP/PCP Air Gun Discussion General
»
Air Gun Gate
(Moderators:
dk1677
,
GTA-Airgunner
,
Tater
) »
Daisy 881 rebuild