Umarex Pistol Servicing

[Rikwaller1979]

That’s great, thanks for your help

[Aimstraight]

These pistols just keep on going, and if they worked fine before probably no action required. If you find that the slide release catch is stiff/problematic, remove the slide (easy job) and put a smear of grease on the vertical plates that lock the slide; that will transform one that is problematic.

[Benelli B76]

The most number of repairs I get on these pistols is the bending of the pressure plate because owners over tighten the brass nut before closing the lever. When the pressure plate gets slightly bent it "over cams" and drops the capsule nozzle back a few thou off the seal and the gas leaks. Immediately they think the seal is worn which it isn't. I just re-bend the Zamak casting and try to re-educate the user.

Baz

[Aimstraight]

The most number of repairs I get on these pistols is the bending of the pressure plate because owners over tighten the brass nut before closing the lever. When the pressure plate gets slightly bent it "over cams" and drops the capsule nozzle back a few thou off the seal and the gas leaks. Immediately they think the seal is worn which it isn't. I just re-bend the Zamak casting and try to re-educate the user.

Baz

Out of interest, which part gets bent, the bear metal one (with the brass screw in it) or the black coated lever that presses on that? I just noticed that black lever on the CP88 is less substantial than the 92fs.

[Doxbox]

Out of interest, which part gets bent, the bear metal one (with the brass screw in it) or the black coated lever that presses on that? I just noticed that black lever on the CP88 is less substantial than the 92fs.

The one with the brass screw in, it deforms and causes the brass screw to bind If you try to straighten it you'll more than likely snap it so just remove the brass screw and grind a bit of the casting away to allow the screw to come out fully. You can get get away with that a couple of times then you'll need a new pusher plate.

[Benelli B76]

I have never snapped one when reforming over the last 8 years I have been doing these. You must slightly warm the metal in the area affected before re-straightening, I find it to be a quick and easy fix, as long as you are capable to strip these pistols and re-assemble them. I can't see how grinding the brass screw will stop the pressure plate falling back when closing.

Baz

[Aimstraight]

Thanks for the replies, most informative. That plate looks quite hefty (although it is an alloy), it must suffer some abuse by those using the gorilla technique. I have seen vids on YouTube where folk close the lever by pressing it on a table (with their whole body weight)....seems OTT to punchure the thin metal on the neck of the CO2 bulb