First PCP... nova freedom and some pellet experiments

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Did you manage to remove the black piece using a pin wrench and if so, how? Any other issues? Just bought a second hand aspen and it has the same pump stuck in the middle issue. I read somewhere that small pieces of the degraded o’rings can block the small bb’s that in the check valves and either cause leaks or in this case a vacuum.
 
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I would like to ask for some help as I also realized that it only takes me 15 pumps to get the gauge from 0-3600! That’s seams Way too little as I read people taking about 75 strokes to get it to 3600!

Also weird is that I only get 3-4 shots from 3600-1000psi, on low power and 2 shots from 3600-1000psi on high power! this is confirmed by the fact it takes me 5 strokes after each shot to get back to 3600 on high power and about 2-3 strokes on low power. im so confused as this .25 Aspen is suppose to see 9-11 decent shots on high power and 15-17 shots on low power! 

Could I have a faulty gauge? Could it be that the previous owner adjusted the hammer spring (I don’t understand the function of adjusting it) and made it put too much pressure through each shot?

I also noticed that my trigger is “loose” (warbles left, rite, back and forth) before it engages the final trigger click. It does not seem to have a 2 stage or any spring to keep the trigger from having this free play. Could this be the issue for such high pressure usage per shot?

any advice would be great guys 🙏🏻


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Allow me please, to jump in a little over my experience grade

FWIW I do own a pair of Freedom 22

If it were my gun I'd begin methodically exploring causes one at a time

Based on your comments I'd work in this order

- Hammer Spring adjustment (unlikely, but rule it out first)

- Evidence of debris clogging the air path

- Bad gauge (requires removing the action from the stock)

Save the trigger issues for another day BTW

HAMMER SPRING

- Counting the turns CW screw the adjuster in until it stops. (do not force it)

- Take note of the number of turns

- Back the adjuster out CCW 3 turns

This will put the adjustment into a reasonable range.

Try shooting the gun

If no change move on

DEBRIS

- pump up the gun

- slowly open the bleed screw letting all air escape

- remove the screw & inspect inside the hole for signs of debris.

- pump the gun with the screw open while watching for debris

- if none, put a few drops of silicone oil in the hole and reinstall the screw

GAUGE

- after removing the stock, remove the gauge and repeat the process for DEBRIS

Further testing would require a hand pump or a tank

It might pay to have a spare gauge on hand to simply swap in

When reinstalling the gauge check condition of O Ring and/or white plastic seal in the bottom of the hole



Post your results please.



Also, I've attached a copy of the Aspen Assembly Instructions.& Parts List

Somewhere in my bookmarks there is a thread on disassembling the gun

When found I will PM it to you

Hope this helps

And of course, anyone with greater experience or different advice, please chime in (and correct me if needed)

Ed

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View attachment AssemblyForSenecaAspen.1.1601133276.pdf

















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Silent Squirrel thank you so much for the steps of elimination. Would have never figured that process out 👍🏻 I will go through them and see if I get any results. I will post The results here.

i love the power and accuracy of this awesome investment! If I can get the pump and pressure system To work perfectly that will be the cherry on the cake!
 
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Silent Squirrel thank you so much for the steps of elimination. Would have never figured that process out 👍🏻 I will go through them and see if I get any results. I will post The results here.

i love the power and accuracy of this awesome investment! If I can get the pump and pressure system To work perfectly that will be the cherry on the cake!
Click to expand...


cedg

You're welcome

Hopefully others, of greater experience, will chime in as well.

If my Freedoms are good indication, once working properly you will thoroughly enjoy the accuracy & power adjustability of the rifle.

As well as the freedom (no pun intended) from compressors.

BTW

As a backup to the on board pump, it is possible to fill it using a PCP hand pump.

It's a small reservoir; and fills easily

Ed

PS

Did the PM get to you?






 
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So to update on the kind suggestions posted here, I kept using the gun yesterday and added more oil as suggested to see if i could get the precharge piston to loosen up and move before following the steps of elimination shared by SilentSquirrel. So I decided to fill a little past 3600 to near 4000psi (I knew the burst disk is rated for 4500), and suddenly I heard a snap/springing sound from near the pump and the pressure gauge dropped to about 2000. So I began to pump it up and instantly there was no more resistance on the extension stroke, and it took about 40 strokes to pump the gun up to 3600. Now it shoots the 14-16 shots on low power like it’s suppose to! 


i can’t say for sure what it was, but I believe it was the precharged piston being stuck.



Thanks again to everyone for being so supportive and informative. Awesome forum!
 
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So to update on the kind suggestions posted here, I kept using the gun yesterday and added more oil as suggested to see if i could get the precharge piston to loosen up and move before following the steps of elimination shared by SilentSquirrel. So I decided to fill a little past 3600 to near 4000psi (I knew the burst disk is rated for 4500), and suddenly I heard a snap/springing sound from near the pump and the pressure gauge dropped to about 2000. So I began to pump it up and instantly there was no more resistance on the extension stroke, and it took about 40 strokes to pump the gun up to 3600. Now it shoots the 14-16 shots on low power like it’s suppose to! 


i can’t say for sure what it was, but I believe it was the precharged piston being stuck.



Thanks again to everyone for being so supportive and informative. Awesome forum!
Click to expand...


cedg

Great to hear that you are up & running.

As you become accustomed to the gun you might want to try shooting fewer shots before pumping.

Some members believe it saves wear & tear on the pump; and dependent upon fill psi may take some pressure (pun intended) off the seals

Some also find benefit in the consistency of fps provided.

If I recall correctly, Android turned me on to this; and referred to remarks in a great 5 part review in Air Gun Academy

The links are posted below

FWIW,

In my use of the gun, protecting the urban home mini orchard from varmints, my preference is a 2880 fill shooting; 3 shots and re-pumping.

No matter what you end up doing, now that the gun is shooting have some fun.

Ed

Air Venturi Seneca Aspen precharged pneumatic air rifle: Part 1 | Air gun blog - Pyramyd Air Report

Air Venturi Seneca Aspen precharged pneumatic air rifle: Part 2 | Air gun blog - Pyramyd Air Report

Air Venturi Seneca Aspen precharged pneumatic air rifle: Part 3 | Air gun blog - Pyramyd Air Report

Air Venturi Seneca Aspen precharged pneumatic air rifle: Part 4 | Air gun blog - Pyramyd Air Report

Air Venturi Seneca Aspen precharged pneumatic air rifle: Part 5 | Air gun blog - Pyramyd Air Report














 
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I am afraid to report that after some more shooting, the power plant is behaving strangely again. It is once again only taking 10-15 pumps to fill to 3600 from 0 and I am getting resistance on the outward extending stroke. I also only get 2-3 shots on low and it’s empty again. It is 100% an issue of not getting the full storage volume of the reservoir, I just can’t understand why or how this issue is happening again😭😭😭. Could there be a blockage somewhere or perhaps lubrications is not getting to the part which occasionally gets stuck (pre-charge piston)?

Does anyone know where I can find the special fill adapter for the pre-charge service valve on the front end of the gun? Would like to get it incase I need to repair and refill to the factory 1700-1800.
 
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This should prove useful. This is from GTA.



THANK YOU SOUPYYY ;- )

https://onedrive.live.com/?authkey=%21APXSqWpleX0gbH8&cid=1B7D28328A998C44&id=1B7D28328A998C44%2118230&parId=1B7D28328A998C44%21106&o=OneUp

Here is info on the gasket seal ! ....Again from Soupyyy

https://www.aliexpress.com/item/10pcs-Green-FKM-O-Ring-Seal-Gasket-2-5mm-CS-Oring-Seal-Washer-7-5-9/32987530138.html?spm=a2g0s.9042311.0.0.27424c4dAFf8Jb

Here is another set of How To Photos
https://www.airgunnation.com/topic/stuck-halfway-thru-seneca-aspen-nova-freedom-pump-repair-photos/

Here is another post on trigger adjustment.
https://hardairmagazine.com/reviews/power-tuning-nova-freedom-air-rifle/

There is a set of PDF PARTS drawings also some where ...Those to were on a post that Soupyyy responded to I believe

https://drive.google.com/drive/folders/1_Wv4mkAVJt_ZSP6MXaHSn3P5UtBilHsq
 
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