Hi All,
I recently bought a G&P Magpul Moe with some miles on the clock for a good price. Bought with the view of learning how to work on gearboxes for myself in the long run. Just figured it was a good place to start as there is plenty of content out there for advise on how to install certain parts and correct methods.
I've stripped the gear box and I'm currently in the process of getting my head around AofE and shimming.
I believe I've correct A of E correctly with a sorbo pad, the sector gear meets the piston at around the 1 o'clock position with the spring in. The sorbo pad however, in diameter a 0.5-1mm wider then that of the cylinder head. Is that much of an issue or not?
Secondly, looking at the shimming. When I opened up the gearbox I found that there was bearings instead of bushings, which I wasn't expecting. The bearings in certain sections have a tiny amount of movement, but on the bevel gear, quite alot. I will try and upload a video but its close to 1mm maybe pushing 2mm movement in the cut out for the bearing (horizontal movement when gear box is upright).
From my understanding this will negate any shimming efforts by myself, its quite a lot of movement.
I have ordered some SHS bushings, however if I get the same effect I feel logic says I would have to bond the bearings or bushings into the gearbox.
If I do have to do this, is best to have the bearing/bushing in as deep as possible and then shim from this point?
Also, bearing or bushings?
The plan is to stick to stock internals, install a gate aster mosfter and run 11.1 Lipo on the stock GPM120 motor.
Any advice on the points above would be great!