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Fiya · June 3rd, 2011, 01:07

I have a SLR 105 Steel version I've recently bought and I am having problems with it. It originally just stopped firing all together with a fully charged battery and had intermittent problems just stopping/starting. Only full auto would often work for a bit then stop. I tried it again later and it started working. (It also chronied in at 387, when it was tested a few days earlier by someone else and was at 415) A few shots later it made a terrible noise, that I won't be able to describe. A screech/grind. I stopped using it that day.

I've checked out the gearbox which seems lubricated enough (Not tons of goo everywhere) and everything checks out. I've reshimmed it also, the shimming job seemed pretty good to start with though. I would still get the intermittent not firing problem. After a even closer inspection I found that on the the motor contact tabs was coming off/was off. I soldered it back on. I also found one of the electrical wiring/tabs going to the trigger system was almost off. I resoldered that aswell. Because the problem seemed electrical I also cleaned off the actual trigger contacts with isoprobyl alcohol. After this the motor alone would work %100 when out of the gearbox and now even when its all together.

It still makes alot of noise and whines more than I would expect from it. Also it actually seems to have a bit of kick. The closest thing I have is my VFC AKS-74UN which shoots 351.4FPS very consistently. Its also alot quieter, with no almost no feedback/kick.

I opened it up again and the one thing I see is that the piston does have some wear which could be causing the noise. I can very small indents where the sector gear is pulling on the piston. That is on about 3 teeth on the piston. (Classic CA 'Yellow' piston, no piston material elsewhere in the gearbox though.) My guess is it seems to be either the piston or possibly motor height. I tried adjusting the height of the motor and cannot figure it out. I originally thought the screw head snapped off, then that it was a hex screw and is just in the threads. There is a 'screw' in the threads, but it does not seem to be a hex screw or anything. I have no clue what to think. It definitely doesn't look snapped off either. My other (Older and stock) SLR 105 has the same thing. I will be replacing the piston in the future, but would like to get this figured out as soon as possible.

How do I adjust the motor height on a CA SLR 105? Also what do you think the problem may be? Any suggestions?

Thanks!

June 3rd, 2011, 01:07	#1
Fiya Trader rating Join Date: Feb 2008 Location: Regina, Saskatchewan	CA SLR 105 Problems I have a SLR 105 Steel version I've recently bought and I am having problems with it. It originally just stopped firing all together with a fully charged battery and had intermittent problems just stopping/starting. Only full auto would often work for a bit then stop. I tried it again later and it started working. (It also chronied in at 387, when it was tested a few days earlier by someone else and was at 415) A few shots later it made a terrible noise, that I won't be able to describe. A screech/grind. I stopped using it that day. I've checked out the gearbox which seems lubricated enough (Not tons of goo everywhere) and everything checks out. I've reshimmed it also, the shimming job seemed pretty good to start with though. I would still get the intermittent not firing problem. After a even closer inspection I found that on the the motor contact tabs was coming off/was off. I soldered it back on. I also found one of the electrical wiring/tabs going to the trigger system was almost off. I resoldered that aswell. Because the problem seemed electrical I also cleaned off the actual trigger contacts with isoprobyl alcohol. After this the motor alone would work %100 when out of the gearbox and now even when its all together. It still makes alot of noise and whines more than I would expect from it. Also it actually seems to have a bit of kick. The closest thing I have is my VFC AKS-74UN which shoots 351.4FPS very consistently. Its also alot quieter, with no almost no feedback/kick. I opened it up again and the one thing I see is that the piston does have some wear which could be causing the noise. I can very small indents where the sector gear is pulling on the piston. That is on about 3 teeth on the piston. (Classic CA 'Yellow' piston, no piston material elsewhere in the gearbox though.) My guess is it seems to be either the piston or possibly motor height. I tried adjusting the height of the motor and cannot figure it out. I originally thought the screw head snapped off, then that it was a hex screw and is just in the threads. There is a 'screw' in the threads, but it does not seem to be a hex screw or anything. I have no clue what to think. It definitely doesn't look snapped off either. My other (Older and stock) SLR 105 has the same thing. I will be replacing the piston in the future, but would like to get this figured out as soon as possible. How do I adjust the motor height on a CA SLR 105? Also what do you think the problem may be? Any suggestions? Thanks!