Heym SR21 Bolt Dissasembly
- Thread starter Spartan Refinishing
- Start date
K
Many thanks for the info - we’ve done this and still can’t get it undone ??. Wondering if we’ve missed something
Stalker62
Well-Known Member
RescueMe0007
Well-Known Member
When I'm storing the bolt separate to my rifle I press the little stud in which allows the bolt handle to rotate and releases the compression of the firing pin spring. I've never dismantled my bolt further than that, hope it helps.
My vague memory from having one of these is that there is a small internal piece that can break and jam with whole thing.
I had to send it to @Ronin to get it sorted. He may remember what the exact problem was and how he resolved it.
Ronin
Distinguished Member
Withdraw the sear using a paralell Jaw vice to hold the sear securely and without causing damage to the sides
Rotate the bolt unscrewing it until the detent prevents further rotation (whilst pulling it so the sear is clear of the bolt tube notch / cocking helical surface)
Press detent and continue rotating (pressing detent each time) until the cocking piece and firing pin becomes detached from the internal thread of the bolt tube
Rotate the bolt unscrewing it until the detent prevents further rotation (whilst pulling it so the sear is clear of the bolt tube notch / cocking helical surface)
Press detent and continue rotating (pressing detent each time) until the cocking piece and firing pin becomes detached from the internal thread of the bolt tube
Last edited:
Many thanks for this - done!!
RescueMe0007
Well-Known Member
I am in need of any assistance anyone may provide. I removed my bolt from my rifle and de-cocked the firing pin spring by depressing the little stud and rotating the bolt down. I've done this previously without mishap, when returning the bolt to the rifle, by reversing the process. Not on this occasion! The bolt handle refuses to rotate up when I have the stud compressed. Any assistance would be most welcome! For some reason I cannot attach the images I took.
RescueMe0007
Well-Known Member
RescueMe0007
Well-Known Member
Ronin
Distinguished Member
You need a vice with parallel jaws or something to attach to the cocking sear
Withdraw it sufficiently to cock the bolt and turn to cocked position
Easier with parallel vice that won’t mark the sear causing it to drag on the shroud and action inlet raceway
I can’t remember exactly (it’s been a while since I had a heym in) but the cyclindrical detent may need pushing in to get to end stage cocked position too
Withdraw it sufficiently to cock the bolt and turn to cocked position
Easier with parallel vice that won’t mark the sear causing it to drag on the shroud and action inlet raceway
I can’t remember exactly (it’s been a while since I had a heym in) but the cyclindrical detent may need pushing in to get to end stage cocked position too
RescueMe0007
Well-Known Member
Thank you Ronin for your much appreciated assistance! I have managed to solve the issue based on your advice, but I had to go at it slightly differently. I used a piece of cord around the silver bar (Klenchblaize's earlier image) with the red directional arrow. I had the cord fixed on a piece of baton so I could stand on it and pull against the spring pressure (took both hands). Once that was extended, an extra pair of hands (my son) rotated the bolt handle and depressed the small cylindrical button which allowed the bolt into the cocked position. So all good. A lesson learned.
HonestJohn
Well-Known Member
I think it’s quite similar to a Mauser 98 disassembly
Similar threads
