FWB 100 problems

[Azmodan]

Hi
i;m having problems with my newly bought FWB100 (from egun.de).
When i got it everything was OK. After 100 pellets (and some dry-firing) it started to not eject all the compressed air on trigger pull (when opening the pump lever air would escape, or if i cocked the gun manually, a second burst of air would come out without pumping) and the pellet flies visibly slower.

I read that the number 9 screw controlled the striker spring, so i screwed it in a bit. That solved the problem for a few shots, than the problem reappeared.
Now i got to the end of the screw length (no more travel space) and the gun still manifests the same problem.
If i leave it alone for some time (~15 minutes) i can get a couple of correct shots and after the problem reappears.

what could be the problem? the striker spring? the valve? the seals?

thank you

[Rover]

I would first put in a new striker spring...…..quick, easy, and cheap.

[Azmodan]

in the end it was just the valve seal. i replaced 1750.214.1 and 1750.215.1 and now it works perfectly.

odd behavior for an old seal (to not expel all the compressed air), but apparently it is the normal symptom for this issue.

[Azmodan]

made a presentation film for my fwb: https://youtu.be/vFPi4_v8YTw (english voiceover!)

[Azmodan]

made a short instruction video on how to replace the valve O-ring: https://youtu.be/7Z_U8ognTKU

[Azmodan]

this is the risk of buying 25 years old guns. the pump lever broke (piece 1840.139.1) after ~2000 shots

[LuckyD]

That is horrible, did you find a replacement part?

[Azmodan]

yes. it;s on the way...

but i couldn;t find any instructions on how to do the replacement. i;ll have to wing it... :/

also, i didn;t find anyone else who had this problem (on the internet... )

[Gwhite]

The college team I help coach has had three IZH's break part of the pump linkage in a very similar location & fashion. The IZH parts look a bit less rugged than the FWB part, but the repair experts I spoke with all swore they'd never seen one snap before. The two pins that hold the linkage part are swaged in place. I managed to locate the 3 linkage pieces we needed, but only 4 pins. I have to machine a couple from scratch and then rig up a swaging system to install them. So far so good...

[LuckyD]

Keep us posted, I got one of these at home as well.

[Azmodan]

got the replacement piece. disassembled the pistol and found out another piece was broken too (part of the piston)- luckily i ordered that piece too (ordered all small pieces under 5$ - just to be safe and not pay shipment for small amounts :) )
after some time figuring how to do it, managed to replace the all the broken parts.

works ok now (chrono tests before and after)

[Gwhite]

Nicely done! You should get a lot of good use out of it.

[LuckyD]

Glad to hear you got everything sorted out. By the way, where do you get your parts?

[Azmodan]

Glad to hear you got everything sorted out. By the way, where do you get your parts?

https://www.waffencenter-gotha.de/shop/ ... 8_653.html

payment is a bit problematic. they use some unsafe payment processor (chrome protested when i tried to open their page) or bank transfer via SEPA - that is not available outside EU

[gunnery]

yes. it;s on the way...

but i couldn;t find any instructions on how to do the replacement. i;ll have to wing it... :/

also, i didn;t find anyone else who had this problem (on the internet... )

I had that problem on a Pardini fiocchi P10 air pistol

[Azmodan]

hi
now i have a new problem with my FWB100. the trigger sometimes releases with very little force and almost no movement
see video: https://youtu.be/aZ9Mg5jONRg

i recently took it apart and cleaned it. but the problem was not resolved.

20200222_203756.jpg (49.5 KiB) Viewed 3200 times

i have no idea what is the problem or what part of the trigger mechanism is broken. any help?

[trev]

Its not the sear ajustment thats needs to be reset as per the instructions in the handbook.