View Single Post
Old February 13th, 2023, 12:05   #1
Xedilian
 
Xedilian's Avatar
 
Join Date: Feb 2011
Location: The 450
[CM048S] Gearbox not cycling - Piston/spring issue

Hello,

It's been quite a few years since I looked at this one, it just kinda stayed in a "ugh i'll do this later" ziploc bag and considering my last thread is from 2015, it has been a while.

The gist of the problem is : Gearbox isn't cycling. Motor connectors get very hot, so does the battery. It jams at what I can imagine is the last tooth of the sector gear, the piston is about 3 shims away from the back of the box, and rotating the bevel gear is met by a blockage. Only way to reset it is to pull the anti-reversal latch and release pressure.

Components :
Stock Cyma V3 gearbox
Guarder SP110 spring
15 Teeth SHS piston (7 steel)
SHS-040 piston head
Short V3 cylinder head
Long V3 nozzle
SHS trigger switch/block
SHS tappet plate
Stock 8.4 1200MAh battery

As far as I know, I haven't ordered any gears, so these are most likely stock.

I've got a feeling that the piston is travelling too far back before release and can't complete the cycle due to some X reason which i'm guessing is the gear has too many teeth? Or maybe the piston. Or maybe removing the spring guide shims (or at least two of them)...

Also yes, I know it lacks some grease right now, I just want to get it to cycle once or twice properly then i'll give it the workover. To give you an idea, the cylinder head is now welded to the cylinder.
And the tappet plate spring, frankly I don't know what happened here, but it is a little mangled and weird looking. Will have to get a new one at some point.

PICTURES!
20230213_115650_HDR.jpg

20230213_115523_HDR.jpg

20230213_115354.jpg

Any help sure will be appreciated!
__________________

GIT GUD OR STAY PLEB

Last edited by Xedilian; February 13th, 2023 at 12:08..
Xedilian is offline   Reply With Quote