strykerles Posted July 8, 2021 Posted July 8, 2021 My cyma SVD decided to shit itself last week and just come to fix it. changed the piston and the trigger box as it had stripped and there were sparks from the wires Replaced the piston fine Replaced the Trigger box (standard V3) The problem I now have is that when I pull the trigger the trolley jumps over the trigger catch as it comes back and won't fire again unless I manually push it back into position pics to follow 20210708_194054.mp4
Supporters Adolf Hamster Posted July 8, 2021 Supporters Posted July 8, 2021 without wishing to sound too obvious, but the return spring hasn't popped off the trolley?
strykerles Posted July 8, 2021 Author Posted July 8, 2021 12 minutes ago, Adolf Hamster said: without wishing to sound too obvious, but the return spring hasn't popped off the trolley? lol no the spring is still definetly there, it's almost as though it's lifting up could the spring do that? I'm thinking it may be something to do with the COL
Supporters Adolf Hamster Posted July 9, 2021 Supporters Posted July 9, 2021 13 hours ago, strykerles said: lol no the spring is still definetly there, it's almost as though it's lifting up could the spring do that? I'm thinking it may be something to do with the COL could be, the col should be kicking the trolley up and the spring pulls it back over the trigger. last time i had this issue was with a boneyard mp5 where the trigger and trolley weren't matched, but i'm assuming that's not the case here.
Supporters Adolf Hamster Posted July 9, 2021 Supporters Posted July 9, 2021 12 minutes ago, strykerles said: No they are a pair ? whatever it is reckon only way to be sure is to pull her apart again.
Supporters Adolf Hamster Posted July 9, 2021 Supporters Posted July 9, 2021 19 minutes ago, strykerles said: Third time lucky ? don't worry, we've all been there
strykerles Posted July 13, 2021 Author Posted July 13, 2021 I'm gonna bump my own post now as this is getting annoying changed out the whole trigger unit and fitted a new RS COL and it's stiill jumping over on return it looks like it's the kick from firing that's doing it I'm at a loss now where's @Sitting Duck when you need him
Supporters Adolf Hamster Posted July 14, 2021 Supporters Posted July 14, 2021 same, it should be kicked up by the col, pulled back by the spring, then when you release the trigger it should drop down again and be caught next time you pull.
strykerles Posted July 14, 2021 Author Posted July 14, 2021 it's not dropping down on release so I'm a bit stuck ?
Supporters Adolf Hamster Posted July 14, 2021 Supporters Posted July 14, 2021 8 minutes ago, strykerles said: it's not dropping down on release so I'm a bit stuck ? yeah. it's one of those things is a pain to try and diagnose remotely, wish i could be more helpful than that
strykerles Posted July 14, 2021 Author Posted July 14, 2021 I appreciate the help, may have to give up and send it to a tech
Stratton Oakmont Posted July 17, 2021 Posted July 17, 2021 Looks to me like the cog on the left is 1 tooth out of sync
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