No32 Mark 3 Scope Reticle Stuck

[Roger Payne]

Peter is the one to give you the definitive answer on this, but I'll try & help a little until/in case he doesn't come along. There are several possibilities. From what you say it appears that the drum rotates, so it is at least not stuck. The drum adjusts range & deflection by the lead screw rotating & screwing itself further into or out of a small shoe that sits against the grat block. On the other side of the grat block there is another T shaped shoe that is tensioned with a spring that ensures there is no sticking/backlash. If your drum is rotating then it could be that the lead screw thread has stripped from previous injudicious handling, or perhaps the shoe that it is threaded into is stripped or has been removed. Also, if the spring was missing or broken in the second (T shaped tensioning shoe), then this might cause the same problem, as it would if the shoe itself was missing or jammed in its housing.

I'm rebuilding two Mk3's at the moment for myself, so enclose a couple of photo's of a drum & grat assembly from one of them. Hopefully a photo will make it clearer. In short though, your scope needs the drum assembly removing to see what is wrong.

P.S. If the drum spins without clicking it may be that the clicker plunger or clicker plate is/are missing, too (or plunger stuck).