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Posted: 12/16/2006 6:37:42 PM EDT
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I picked up a 1982 HK93A2 last week, read the manual, cleaned it and took it to the range this a.m. The rifle came w/ a 4" adjustment tool that has a Phillips-head on 1 end and cylinder adjustment prongs embedded at the handle end. The tool # is 1013-W4. After several well-grouped shots, it was evident the elevation POI needed to be raised. P. 18 of 24 in the Instruction Manual states: - Insert elevation adjustment tool into the rear cylinder so that the wedges of the tool engage i the two splines in the cylinder which contain the catch bolts. (Now the adjustment tool shown in Fig. 42 looks similar to mine but not exact. Is this a problem? Also There are 2 pair of splines in the cylinder, how do I know which pair contain the catch bolts?) - Press Phillips-head screwdriver downward into the adjustment tool and hold fast. (I think I was holding fast w/ the prong end of the adjustment tool.) - Turn rear sight cylinder manually in the desired direction...If the sight cylinder is marked w/ the "2", "3" and "4". This is where my problem is. Nothing was holding fast. I was pressing the adjustment tool downward, but when I manually turn the sight cylinder the adjustment tool is not holding the bolt down/fast and is rotating along w/ the sight cylinder rotation. Somehow the catch bolts are not disengaging from the splines. I don't know if I've got the wrong tool, or if I need to put some gun oil in there to help w/ the disengagement or something else. TIA IP |
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It's hard until you get the hang of it. Look into the "barrel" you will see four notches around the inside. The tool basically pushes the pins into the center disengauging them from the barrel. Which allows you to rotate the barrel up and down to adjust. Push the sleeve down into barrel. Engauging the pins with the arms of the tool. Pushing the screwdriver portion into the sleeve will release the barrel to turn. Adjust, shoot, repeat! |
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Thanks for the replies guys, but I'm not having much luck yet. I have pressed both the adjustment tool and some needle nosed pliers into the 2 notches which contain the catch bolts. I can't tell if the catch bolts are supposed to move down or in towards the barrel. I removed the clamping bolt and removed the rear sight so I could better see what's going on. I saw the spring which set's the cylinder settings, and I saw some kind of screw which I guess the barrel rotates on. I placed a coupe of drops into the catch bolt/spline area to try to get the barrel/cylinder to loosen up, but I do not believe the catch bolts are disengaging even when I press fairly hard (down or in?) w/ the pliers. Again, TIA for any guidance. I want to get this aspect of my HK right and shoot it every w-e. IP |
A huge +1 on this. You essentially use the pliers/hemostats to sqeeze the 2 divits inwards which then allows the cylinder to rotate freely (must keep divits pressed in during that), then dial up/down, release hemostats and then move the drum unil they reengage. |
the catch bolts move inward to release the drum
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