Systema Piston Head - where do the bearings go?

[Panoptes]

As title, where do the spacing washers and bearing thingy go?...

[johnnyj]

Re: Systema Piston Head - where do the bearings go?

if your going to use them inside the piston

the order would be :
piston head - piston - 1 metal spacer - bearings - metal spacer - cap - screw

[Panoptes]

Re: Systema Piston Head - where do the bearings go?

Hmm, thanks.

What confuses me is that they have no mechanical contact with the top of the piston that way - like they're just there for no reason...

[johnnyj]

Re: Systema Piston Head - where do the bearings go?

there to help the spring waste of time tbh as they hadd extra weight to the piston, i use bearing spring guides ( dont use both )

[Panoptes]

Re: Systema Piston Head - where do the bearings go?

Grrrrrrrr. Damn this thing. Isn't the nozzle supposed to rest in the forward position after firing? Test firing reveals that the nozzle and gears stop in different positions after each firing and sometimes fully to the rear. Is this what could be causing the double feeds? Any ideas what's wrong?

[johnnyj]

Re: Systema Piston Head - where do the bearings go?

on semi it should come to the forward position , what battery you using now ? and what motor ?

[Panoptes]

Re: Systema Piston Head - where do the bearings go?

Batteries tested are: 20C 7.4v Lipo and a 1500mAh Nimh (appears to be firing the same on both).

Motor is a TM Hyper 1000.

Cheers.

[johnnyj]

Re: Systema Piston Head - where do the bearings go?

they should be fine its like the motor is still spinning for that split second longer than it should got to run work now sorry i cant help any more but with out seeing it i cant realy think whats going on

[North West Outpost]

Re: Systema Piston Head - where do the bearings go?

I am no expert on the eletrical side of things but I have thought about this for a while. The trigger is just like a simple switch, I doesn't start and stop in exactly the same place every shot due to the tiny ammount of time it takes to cycle the system. So they do vary a bit each shot. My thoughts anyway. That with the anti reverse won't allow it to return to spring extended position, so can be left compressed.

[Panoptes]

Re: Systema Piston Head - where do the bearings go?

Ah well, on the fourth re-assemble today, the gearbox destroyed itself by the sound of things. Really bad grinding noise of teeth stripping.

Busy now so will send it off to F-S for repair as there's obviously something seriously wrong somewhere...

Thanks for everyone's help.

[North West Outpost]

Re: Systema Piston Head - where do the bearings go?

Hmm, thanks.

What confuses me is that they have no mechanical contact with the top of the piston that way - like they're just there for no reason...

They are pushed against the inside of the piston by the spring.